/*
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */

import {
    AccountInfo,
    TenantProfile,
    updateAccountTenantProfileData,
} from "../account/AccountInfo.js";
import { extractTokenClaims } from "../account/AuthToken.js";
import { TokenClaims } from "../account/TokenClaims.js";
import { getAliasesFromStaticSources } from "../authority/AuthorityMetadata.js";
import { StaticAuthorityOptions } from "../authority/AuthorityOptions.js";
import { ICrypto } from "../crypto/ICrypto.js";
import { AuthError } from "../error/AuthError.js";
import { createCacheError } from "../error/CacheError.js";
import {
    ClientAuthErrorCodes,
    createClientAuthError,
} from "../error/ClientAuthError.js";
import { Logger } from "../logger/Logger.js";
import { name, version } from "../packageMetadata.js";
import { BaseAuthRequest } from "../request/BaseAuthRequest.js";
import { ScopeSet } from "../request/ScopeSet.js";
import { StoreInCache } from "../request/StoreInCache.js";
import { IPerformanceClient } from "../telemetry/performance/IPerformanceClient.js";
import * as Constants from "../utils/Constants.js";
import { AccessTokenEntity } from "./entities/AccessTokenEntity.js";
import { AccountEntity } from "./entities/AccountEntity.js";
import { AppMetadataEntity } from "./entities/AppMetadataEntity.js";
import { AuthorityMetadataEntity } from "./entities/AuthorityMetadataEntity.js";
import { CacheRecord } from "./entities/CacheRecord.js";
import { CredentialEntity } from "./entities/CredentialEntity.js";
import { IdTokenEntity } from "./entities/IdTokenEntity.js";
import { RefreshTokenEntity } from "./entities/RefreshTokenEntity.js";
import { ServerTelemetryEntity } from "./entities/ServerTelemetryEntity.js";
import { ThrottlingEntity } from "./entities/ThrottlingEntity.js";
import { ICacheManager } from "./interface/ICacheManager.js";
import * as AccountEntityUtils from "./utils/AccountEntityUtils.js";
import {
    AccountFilter,
    AppMetadataCache,
    AppMetadataFilter,
    CredentialFilter,
    TenantProfileFilter,
    TokenKeys,
    ValidCredentialType,
} from "./utils/CacheTypes.js";

/**
 * Interface class which implement cache storage functions used by MSAL to perform validity checks, and store tokens.
 * @internal
 */
export abstract class CacheManager implements ICacheManager {
    protected clientId: string;
    protected cryptoImpl: ICrypto;
    // Instance of logger for functions defined in the msal-common layer
    private commonLogger: Logger;
    private staticAuthorityOptions?: StaticAuthorityOptions;
    protected performanceClient: IPerformanceClient;

    constructor(
        clientId: string,
        cryptoImpl: ICrypto,
        logger: Logger,
        performanceClient: IPerformanceClient,
        staticAuthorityOptions?: StaticAuthorityOptions
    ) {
        this.clientId = clientId;
        this.cryptoImpl = cryptoImpl;
        this.commonLogger = logger.clone(name, version);
        this.staticAuthorityOptions = staticAuthorityOptions;
        this.performanceClient = performanceClient;
    }

    /**
     * fetch the account entity from the platform cache
     *  @param accountKey
     */
    abstract getAccount(
        accountKey: string,
        correlationId: string
    ): AccountEntity | null;

    /**
     * set account entity in the platform cache
     * @param account
     * @param correlationId
     */
    abstract setAccount(
        account: AccountEntity,
        correlationId: string,
        kmsi: boolean,
        apiId: number
    ): Promise<void>;

    /**
     * fetch the idToken entity from the platform cache
     * @param idTokenKey
     */
    abstract getIdTokenCredential(
        idTokenKey: string,
        correlationId: string
    ): IdTokenEntity | null;

    /**
     * set idToken entity to the platform cache
     * @param idToken
     * @param correlationId
     */
    abstract setIdTokenCredential(
        idToken: IdTokenEntity,
        correlationId: string,
        kmsi: boolean
    ): Promise<void>;

    /**
     * fetch the idToken entity from the platform cache
     * @param accessTokenKey
     */
    abstract getAccessTokenCredential(
        accessTokenKey: string,
        correlationId: string
    ): AccessTokenEntity | null;

    /**
     * set accessToken entity to the platform cache
     * @param accessToken
     * @param correlationId
     */
    abstract setAccessTokenCredential(
        accessToken: AccessTokenEntity,
        correlationId: string,
        kmsi: boolean
    ): Promise<void>;

    /**
     * fetch the idToken entity from the platform cache
     * @param refreshTokenKey
     */
    abstract getRefreshTokenCredential(
        refreshTokenKey: string,
        correlationId: string
    ): RefreshTokenEntity | null;

    /**
     * set refreshToken entity to the platform cache
     * @param refreshToken
     * @param correlationId
     */
    abstract setRefreshTokenCredential(
        refreshToken: RefreshTokenEntity,
        correlationId: string,
        kmsi: boolean
    ): Promise<void>;

    /**
     * fetch appMetadata entity from the platform cache
     * @param appMetadataKey
     * @param correlationId
     */
    abstract getAppMetadata(
        appMetadataKey: string,
        correlationId: string
    ): AppMetadataEntity | null;

    /**
     * set appMetadata entity to the platform cache
     * @param appMetadata
     */
    abstract setAppMetadata(
        appMetadata: AppMetadataEntity,
        correlationId: string
    ): void;

    /**
     * fetch server telemetry entity from the platform cache
     * @param serverTelemetryKey
     * @param correlationId
     */
    abstract getServerTelemetry(
        serverTelemetryKey: string,
        correlationId: string
    ): ServerTelemetryEntity | null;

    /**
     * set server telemetry entity to the platform cache
     * @param serverTelemetryKey
     * @param serverTelemetry
     * @param correlationId
     */
    abstract setServerTelemetry(
        serverTelemetryKey: string,
        serverTelemetry: ServerTelemetryEntity,
        correlationId: string
    ): void;

    /**
     * fetch cloud discovery metadata entity from the platform cache
     * @param key
     * @param correlationId
     */
    abstract getAuthorityMetadata(
        key: string,
        correlationId: string
    ): AuthorityMetadataEntity | null;

    /**
     *
     */
    abstract getAuthorityMetadataKeys(): Array<string>;

    /**
     * set cloud discovery metadata entity to the platform cache
     * @param key
     * @param value
     * @param correlationId
     */
    abstract setAuthorityMetadata(
        key: string,
        value: AuthorityMetadataEntity,
        correlationId: string
    ): void;

    /**
     * fetch throttling entity from the platform cache
     * @param throttlingCacheKey
     * @param correlationId
     */
    abstract getThrottlingCache(
        throttlingCacheKey: string,
        correlationId: string
    ): ThrottlingEntity | null;

    /**
     * set throttling entity to the platform cache
     * @param throttlingCacheKey
     * @param throttlingCache
     */
    abstract setThrottlingCache(
        throttlingCacheKey: string,
        throttlingCache: ThrottlingEntity,
        correlationId: string
    ): void;

    /**
     * Function to remove an item from cache given its key.
     * @param key
     */
    abstract removeItem(key: string, correlationId: string): void;

    /**
     * Function which retrieves all current keys from the cache.
     */
    abstract getKeys(): string[];

    /**
     * Function which retrieves all account keys from the cache
     */
    abstract getAccountKeys(): string[];

    /**
     * Function which retrieves all token keys from the cache
     */
    abstract getTokenKeys(): TokenKeys;

    /**
     * Returns credential cache key from the entity
     * @param credential
     */
    abstract generateCredentialKey(credential: CredentialEntity): string;

    /**
     * Returns the account cache key from the account info
     * @param account
     */
    abstract generateAccountKey(account: AccountInfo): string;

    /**
     * Returns all the accounts in the cache that match the optional filter. If no filter is provided, all accounts are returned.
     * @param accountFilter - (Optional) filter to narrow down the accounts returned
     * @returns Array of AccountInfo objects in cache
     */
    getAllAccounts(
        accountFilter: AccountFilter = {},
        correlationId: string
    ): AccountInfo[] {
        return this.buildTenantProfiles(
            this.getAccountsFilteredBy(accountFilter, correlationId),
            correlationId,
            accountFilter
        );
    }

    /**
     * Gets first tenanted AccountInfo object found based on provided filters
     */
    getAccountInfoFilteredBy(
        accountFilter: AccountFilter,
        correlationId: string
    ): AccountInfo | null {
        if (
            Object.keys(accountFilter).length === 0 ||
            Object.values(accountFilter).every(
                (value) => value === null || value === undefined || value === ""
            )
        ) {
            this.commonLogger.warning(
                "getAccountInfoFilteredBy: Account filter is empty or invalid, returning null",
                correlationId
            );
            return null;
        }
        const allAccounts = this.getAllAccounts(accountFilter, correlationId);
        if (allAccounts.length > 1) {
            // If one or more accounts are found, prioritize accounts that have an ID token
            const sortedAccounts = allAccounts.sort((a, b) => {
                const aHasClaims = a.idTokenClaims ? 1 : 0;
                const bHasClaims = b.idTokenClaims ? 1 : 0;
                return bHasClaims - aHasClaims;
            });
            return sortedAccounts[0];
        } else if (allAccounts.length === 1) {
            // If only one account is found, return it regardless of whether a matching ID token was found
            return allAccounts[0];
        } else {
            return null;
        }
    }

    /**
     * Returns a single matching
     * @param accountFilter
     * @returns
     */
    getBaseAccountInfo(
        accountFilter: AccountFilter,
        correlationId: string
    ): AccountInfo | null {
        const accountEntities = this.getAccountsFilteredBy(
            accountFilter,
            correlationId
        );
        if (accountEntities.length > 0) {
            return AccountEntityUtils.getAccountInfo(accountEntities[0]);
        } else {
            return null;
        }
    }

    /**
     * Matches filtered account entities with cached ID tokens that match the tenant profile-specific account filters
     * and builds the account info objects from the matching ID token's claims
     * @param cachedAccounts
     * @param accountFilter
     * @returns Array of AccountInfo objects that match account and tenant profile filters
     */
    private buildTenantProfiles(
        cachedAccounts: AccountEntity[],
        correlationId: string,
        accountFilter?: AccountFilter
    ): AccountInfo[] {
        return cachedAccounts.flatMap((accountEntity) => {
            return this.getTenantProfilesFromAccountEntity(
                accountEntity,
                correlationId,
                accountFilter?.tenantId,
                accountFilter
            );
        });
    }

    private getTenantedAccountInfoByFilter(
        accountInfo: AccountInfo,
        tokenKeys: TokenKeys,
        tenantProfile: TenantProfile,
        correlationId: string,
        tenantProfileFilter?: TenantProfileFilter
    ): AccountInfo | null {
        let tenantedAccountInfo: AccountInfo | null = null;
        let idTokenClaims: TokenClaims | undefined;

        if (tenantProfileFilter) {
            if (
                !this.tenantProfileMatchesFilter(
                    tenantProfile,
                    tenantProfileFilter
                )
            ) {
                return null;
            }
        }

        const idToken = this.getIdToken(
            accountInfo,
            correlationId,
            tokenKeys,
            tenantProfile.tenantId
        );

        if (idToken) {
            idTokenClaims = extractTokenClaims(
                idToken.secret,
                this.cryptoImpl.base64Decode
            );

            if (
                !this.idTokenClaimsMatchTenantProfileFilter(
                    idTokenClaims,
                    tenantProfileFilter
                )
            ) {
                // ID token sourced claims don't match so this tenant profile is not a match
                return null;
            }
        }

        // Expand tenant profile into account info based on matching tenant profile and if available matching ID token claims
        tenantedAccountInfo = updateAccountTenantProfileData(
            accountInfo,
            tenantProfile,
            idTokenClaims,
            idToken?.secret
        );

        return tenantedAccountInfo;
    }

    private getTenantProfilesFromAccountEntity(
        accountEntity: AccountEntity,
        correlationId: string,
        targetTenantId?: string,
        tenantProfileFilter?: TenantProfileFilter
    ): AccountInfo[] {
        const accountInfo = AccountEntityUtils.getAccountInfo(accountEntity);
        let searchTenantProfiles: Map<string, TenantProfile> =
            accountInfo.tenantProfiles || new Map<string, TenantProfile>();
        const tokenKeys = this.getTokenKeys();

        // If a tenant ID was provided, only return the tenant profile for that tenant ID if it exists
        if (targetTenantId) {
            const tenantProfile = searchTenantProfiles.get(targetTenantId);
            if (tenantProfile) {
                // Reduce search field to just this tenant profile
                searchTenantProfiles = new Map<string, TenantProfile>([
                    [targetTenantId, tenantProfile],
                ]);
            } else {
                // No tenant profile for search tenant ID, return empty array
                return [];
            }
        }

        const matchingTenantProfiles: AccountInfo[] = [];
        searchTenantProfiles.forEach((tenantProfile: TenantProfile) => {
            const tenantedAccountInfo = this.getTenantedAccountInfoByFilter(
                accountInfo,
                tokenKeys,
                tenantProfile,
                correlationId,
                tenantProfileFilter
            );
            if (tenantedAccountInfo) {
                matchingTenantProfiles.push(tenantedAccountInfo);
            }
        });

        return matchingTenantProfiles;
    }

    private tenantProfileMatchesFilter(
        tenantProfile: TenantProfile,
        tenantProfileFilter: TenantProfileFilter
    ): boolean {
        if (
            !!tenantProfileFilter.localAccountId &&
            !this.matchLocalAccountIdFromTenantProfile(
                tenantProfile,
                tenantProfileFilter.localAccountId
            )
        ) {
            return false;
        }

        if (
            !!tenantProfileFilter.name &&
            !(tenantProfile.name === tenantProfileFilter.name)
        ) {
            return false;
        }

        if (
            tenantProfileFilter.isHomeTenant !== undefined &&
            !(tenantProfile.isHomeTenant === tenantProfileFilter.isHomeTenant)
        ) {
            return false;
        }

        if (
            !!tenantProfileFilter.username &&
            !(
                this.matchUsername(
                    tenantProfile.username,
                    tenantProfileFilter.username
                ) ||
                !this.matchUsername(
                    tenantProfile.upn,
                    tenantProfileFilter.username
                )
            )
        ) {
            return false;
        }

        if (
            !!tenantProfileFilter.loginHint &&
            !this.matchLoginHintWithTenantProfile(
                tenantProfile,
                tenantProfileFilter.loginHint
            )
        ) {
            return false;
        }

        if (
            !!tenantProfileFilter.upn &&
            !(tenantProfile.upn === tenantProfileFilter.upn)
        ) {
            return false;
        }

        return true;
    }

    private idTokenClaimsMatchTenantProfileFilter(
        idTokenClaims: TokenClaims,
        tenantProfileFilter?: TenantProfileFilter
    ): boolean {
        // Tenant Profile filtering
        if (tenantProfileFilter) {
            if (
                !!tenantProfileFilter.localAccountId &&
                !this.matchLocalAccountIdFromTokenClaims(
                    idTokenClaims,
                    tenantProfileFilter.localAccountId
                )
            ) {
                return false;
            }

            if (
                !!tenantProfileFilter.loginHint &&
                !this.matchLoginHintFromTokenClaims(
                    idTokenClaims,
                    tenantProfileFilter.loginHint
                )
            ) {
                return false;
            }

            if (
                !!tenantProfileFilter.username &&
                !this.matchUsername(
                    idTokenClaims.preferred_username,
                    tenantProfileFilter.username
                ) &&
                !this.matchUsername(
                    idTokenClaims.upn,
                    tenantProfileFilter.username
                )
            ) {
                return false;
            }

            if (
                !!tenantProfileFilter.name &&
                !this.matchName(idTokenClaims, tenantProfileFilter.name)
            ) {
                return false;
            }

            if (
                !!tenantProfileFilter.sid &&
                !this.matchSid(idTokenClaims, tenantProfileFilter.sid)
            ) {
                return false;
            }
        }

        return true;
    }

    /**
     * saves a cache record
     * @param cacheRecord {CacheRecord}
     * @param storeInCache {?StoreInCache}
     * @param correlationId {?string} correlation id
     */
    async saveCacheRecord(
        cacheRecord: CacheRecord,
        correlationId: string,
        kmsi: boolean,
        apiId: number,
        storeInCache?: StoreInCache
    ): Promise<void> {
        if (!cacheRecord) {
            throw createClientAuthError(
                ClientAuthErrorCodes.invalidCacheRecord
            );
        }

        try {
            if (!!cacheRecord.account) {
                await this.setAccount(
                    cacheRecord.account,
                    correlationId,
                    kmsi,
                    apiId
                );
            }

            if (!!cacheRecord.idToken && storeInCache?.idToken !== false) {
                await this.setIdTokenCredential(
                    cacheRecord.idToken,
                    correlationId,
                    kmsi
                );
            }

            if (
                !!cacheRecord.accessToken &&
                storeInCache?.accessToken !== false
            ) {
                await this.saveAccessToken(
                    cacheRecord.accessToken,
                    correlationId,
                    kmsi
                );
            }

            if (
                !!cacheRecord.refreshToken &&
                storeInCache?.refreshToken !== false
            ) {
                await this.setRefreshTokenCredential(
                    cacheRecord.refreshToken,
                    correlationId,
                    kmsi
                );
            }

            if (!!cacheRecord.appMetadata) {
                this.setAppMetadata(cacheRecord.appMetadata, correlationId);
            }
        } catch (e: unknown) {
            this.commonLogger?.error(
                `CacheManager.saveCacheRecord: failed`,
                correlationId
            );
            if (e instanceof AuthError) {
                throw e;
            } else {
                throw createCacheError(e);
            }
        }
    }

    /**
     * saves access token credential
     * @param credential
     */
    private async saveAccessToken(
        credential: AccessTokenEntity,
        correlationId: string,
        kmsi: boolean
    ): Promise<void> {
        const accessTokenFilter: CredentialFilter = {
            clientId: credential.clientId,
            credentialType: credential.credentialType,
            environment: credential.environment,
            homeAccountId: credential.homeAccountId,
            realm: credential.realm,
            tokenType: credential.tokenType,
        };

        const tokenKeys = this.getTokenKeys();
        const currentScopes = ScopeSet.fromString(credential.target);

        tokenKeys.accessToken.forEach((key) => {
            if (
                !this.accessTokenKeyMatchesFilter(key, accessTokenFilter, false)
            ) {
                return;
            }

            const tokenEntity = this.getAccessTokenCredential(
                key,
                correlationId
            );

            if (
                tokenEntity &&
                this.credentialMatchesFilter(
                    tokenEntity,
                    accessTokenFilter,
                    correlationId
                )
            ) {
                const tokenScopeSet = ScopeSet.fromString(tokenEntity.target);
                if (tokenScopeSet.intersectingScopeSets(currentScopes)) {
                    this.removeAccessToken(key, correlationId);
                }
            }
        });
        await this.setAccessTokenCredential(credential, correlationId, kmsi);
    }

    /**
     * Retrieve account entities matching all provided tenant-agnostic filters; if no filter is set, get all account entities in the cache
     * Not checking for casing as keys are all generated in lower case, remember to convert to lower case if object properties are compared
     * @param accountFilter - An object containing Account properties to filter by
     */
    getAccountsFilteredBy(
        accountFilter: AccountFilter,
        correlationId: string
    ): AccountEntity[] {
        const allAccountKeys = this.getAccountKeys();
        const matchingAccounts: AccountEntity[] = [];
        allAccountKeys.forEach((cacheKey) => {
            const entity: AccountEntity | null = this.getAccount(
                cacheKey,
                correlationId
            );

            // Match base account fields

            if (!entity) {
                return;
            }

            if (
                !!accountFilter.homeAccountId &&
                !this.matchHomeAccountId(entity, accountFilter.homeAccountId)
            ) {
                return;
            }

            if (
                !!accountFilter.environment &&
                !this.matchEnvironment(
                    entity,
                    accountFilter.environment,
                    correlationId
                )
            ) {
                return;
            }

            if (
                !!accountFilter.realm &&
                !this.matchRealm(entity, accountFilter.realm)
            ) {
                return;
            }

            if (
                !!accountFilter.nativeAccountId &&
                !this.matchNativeAccountId(
                    entity,
                    accountFilter.nativeAccountId
                )
            ) {
                return;
            }

            if (
                !!accountFilter.authorityType &&
                !this.matchAuthorityType(entity, accountFilter.authorityType)
            ) {
                return;
            }

            // If at least one tenant profile matches the tenant profile filter, add the account to the list of matching accounts
            const tenantProfileFilter: TenantProfileFilter = {
                localAccountId: accountFilter?.localAccountId,
                name: accountFilter?.name,
                username: accountFilter?.username,
                loginHint: accountFilter?.loginHint,
                upn: accountFilter?.upn,
            };

            const matchingTenantProfiles = entity.tenantProfiles?.filter(
                (tenantProfile: TenantProfile) => {
                    return this.tenantProfileMatchesFilter(
                        tenantProfile,
                        tenantProfileFilter
                    );
                }
            );

            if (matchingTenantProfiles && matchingTenantProfiles.length === 0) {
                // No tenant profile for this account matches filter, don't add to list of matching accounts
                return;
            }

            matchingAccounts.push(entity);
        });

        return matchingAccounts;
    }

    /**
     * Returns whether or not the given credential entity matches the filter
     * @param entity
     * @param filter
     * @param correlationId
     * @returns
     */
    credentialMatchesFilter(
        entity: ValidCredentialType,
        filter: CredentialFilter,
        correlationId: string
    ): boolean {
        if (!!filter.clientId && !this.matchClientId(entity, filter.clientId)) {
            return false;
        }

        if (
            !!filter.userAssertionHash &&
            !this.matchUserAssertionHash(entity, filter.userAssertionHash)
        ) {
            return false;
        }

        /*
         * homeAccountId can be undefined, and we want to filter out cached items that have a homeAccountId of ""
         * because we don't want a client_credential request to return a cached token that has a homeAccountId
         */
        if (
            typeof filter.homeAccountId === "string" &&
            !this.matchHomeAccountId(entity, filter.homeAccountId)
        ) {
            return false;
        }

        if (
            !!filter.environment &&
            !this.matchEnvironment(entity, filter.environment, correlationId)
        ) {
            return false;
        }

        if (!!filter.realm && !this.matchRealm(entity, filter.realm)) {
            return false;
        }

        if (
            !!filter.credentialType &&
            !this.matchCredentialType(entity, filter.credentialType)
        ) {
            return false;
        }

        if (!!filter.familyId && !this.matchFamilyId(entity, filter.familyId)) {
            return false;
        }

        /*
         * idTokens do not have "target", target specific refreshTokens do exist for some types of authentication
         * Resource specific refresh tokens case will be added when the support is deemed necessary
         */
        if (!!filter.target && !this.matchTarget(entity, filter.target)) {
            return false;
        }

        // Access Token with Auth Scheme specific matching
        if (
            entity.credentialType ===
            Constants.CredentialType.ACCESS_TOKEN_WITH_AUTH_SCHEME
        ) {
            if (
                !!filter.tokenType &&
                !this.matchTokenType(entity, filter.tokenType)
            ) {
                return false;
            }

            // KeyId (sshKid) in request must match cached SSH certificate keyId because SSH cert is bound to a specific key
            if (filter.tokenType === Constants.AuthenticationScheme.SSH) {
                if (filter.keyId && !this.matchKeyId(entity, filter.keyId)) {
                    return false;
                }
            }
        }

        return true;
    }

    /**
     * retrieve appMetadata matching all provided filters; if no filter is set, get all appMetadata
     * @param filter
     * @param correlationId
     */
    getAppMetadataFilteredBy(
        filter: AppMetadataFilter,
        correlationId: string
    ): AppMetadataCache {
        const allCacheKeys = this.getKeys();
        const matchingAppMetadata: AppMetadataCache = {};

        allCacheKeys.forEach((cacheKey) => {
            // don't parse any non-appMetadata type cache entities
            if (!this.isAppMetadata(cacheKey)) {
                return;
            }

            // Attempt retrieval
            const entity = this.getAppMetadata(cacheKey, correlationId);

            if (!entity) {
                return;
            }

            if (
                !!filter.environment &&
                !this.matchEnvironment(
                    entity,
                    filter.environment,
                    correlationId
                )
            ) {
                return;
            }

            if (
                !!filter.clientId &&
                !this.matchClientId(entity, filter.clientId)
            ) {
                return;
            }

            matchingAppMetadata[cacheKey] = entity;
        });

        return matchingAppMetadata;
    }

    /**
     * retrieve authorityMetadata that contains a matching alias
     * @param host
     * @param correlationId
     */
    getAuthorityMetadataByAlias(
        host: string,
        correlationId: string
    ): AuthorityMetadataEntity | null {
        const allCacheKeys = this.getAuthorityMetadataKeys();
        let matchedEntity = null;

        allCacheKeys.forEach((cacheKey) => {
            // don't parse any non-authorityMetadata type cache entities
            if (
                !this.isAuthorityMetadata(cacheKey) ||
                cacheKey.indexOf(this.clientId) === -1
            ) {
                return;
            }

            // Attempt retrieval
            const entity = this.getAuthorityMetadata(cacheKey, correlationId);

            if (!entity) {
                return;
            }

            if (entity.aliases.indexOf(host) === -1) {
                return;
            }

            matchedEntity = entity;
        });

        return matchedEntity;
    }

    /**
     * Removes all accounts and related tokens from cache.
     */
    removeAllAccounts(correlationId: string): void {
        const accounts = this.getAllAccounts({}, correlationId);
        accounts.forEach((account) => {
            this.removeAccount(account, correlationId);
        });
    }

    /**
     * Removes the account and related tokens for a given account key
     * @param account
     */
    removeAccount(account: AccountInfo, correlationId: string): void {
        this.removeAccountContext(account, correlationId);
        const accountKeys = this.getAccountKeys();
        const keyFilter = (key: string): boolean => {
            return (
                key.includes(account.homeAccountId) &&
                key.includes(account.environment)
            );
        };
        accountKeys.filter(keyFilter).forEach((key) => {
            this.removeItem(key, correlationId);
            this.performanceClient.incrementFields(
                { accountsRemoved: 1 },
                correlationId
            );
        });
    }

    /**
     * Removes credentials associated with the provided account
     * @param account
     */
    removeAccountContext(account: AccountInfo, correlationId: string): void {
        const allTokenKeys = this.getTokenKeys();
        const keyFilter = (key: string): boolean => {
            return (
                key.includes(account.homeAccountId) &&
                key.includes(account.environment)
            );
        };

        allTokenKeys.idToken.filter(keyFilter).forEach((key) => {
            this.removeIdToken(key, correlationId);
        });

        allTokenKeys.accessToken.filter(keyFilter).forEach((key) => {
            this.removeAccessToken(key, correlationId);
        });

        allTokenKeys.refreshToken.filter(keyFilter).forEach((key) => {
            this.removeRefreshToken(key, correlationId);
        });
    }

    /**
     * returns a boolean if the given credential is removed
     * @param key
     * @param correlationId
     */
    removeAccessToken(key: string, correlationId: string): void {
        const credential = this.getAccessTokenCredential(key, correlationId);
        if (!credential) {
            return;
        }

        this.removeItem(key, correlationId);
        this.performanceClient.incrementFields(
            { accessTokensRemoved: 1 },
            correlationId
        );

        // Remove Token Binding Key from key store for PoP Tokens Credentials
        if (
            credential.credentialType.toLowerCase() ===
            Constants.CredentialType.ACCESS_TOKEN_WITH_AUTH_SCHEME.toLowerCase()
        ) {
            if (credential.tokenType === Constants.AuthenticationScheme.POP) {
                const accessTokenWithAuthSchemeEntity =
                    credential as AccessTokenEntity;
                const kid = accessTokenWithAuthSchemeEntity.keyId;

                if (kid) {
                    void this.cryptoImpl
                        .removeTokenBindingKey(kid, correlationId)
                        .catch(() => {
                            this.commonLogger.error(
                                `Failed to remove token binding key '${kid}'`,
                                correlationId
                            );
                            this.performanceClient?.incrementFields(
                                { removeTokenBindingKeyFailure: 1 },
                                correlationId
                            );
                        });
                }
            }
        }
    }

    /**
     * Removes all app metadata objects from cache.
     */
    removeAppMetadata(correlationId: string): boolean {
        const allCacheKeys = this.getKeys();
        allCacheKeys.forEach((cacheKey) => {
            if (this.isAppMetadata(cacheKey)) {
                this.removeItem(cacheKey, correlationId);
            }
        });

        return true;
    }

    /**
     * Retrieve IdTokenEntity from cache
     * @param account {AccountInfo}
     * @param tokenKeys {?TokenKeys}
     * @param targetRealm {?string}
     * @param performanceClient {?IPerformanceClient}
     * @param correlationId {?string}
     */
    getIdToken(
        account: AccountInfo,
        correlationId: string,
        tokenKeys?: TokenKeys,
        targetRealm?: string
    ): IdTokenEntity | null {
        this.commonLogger.trace(
            "CacheManager - getIdToken called",
            correlationId
        );
        const idTokenFilter: CredentialFilter = {
            homeAccountId: account.homeAccountId,
            environment: account.environment,
            credentialType: Constants.CredentialType.ID_TOKEN,
            clientId: this.clientId,
            realm: targetRealm,
        };

        const idTokenMap: Map<string, IdTokenEntity> = this.getIdTokensByFilter(
            idTokenFilter,
            correlationId,
            tokenKeys
        );

        const numIdTokens = idTokenMap.size;

        if (numIdTokens < 1) {
            this.commonLogger.info(
                "CacheManager:getIdToken - No token found",
                correlationId
            );
            return null;
        } else if (numIdTokens > 1) {
            let tokensToBeRemoved: Map<string, IdTokenEntity> = idTokenMap;
            // Multiple tenant profiles and no tenant specified, pick home account
            if (!targetRealm) {
                const homeIdTokenMap: Map<string, IdTokenEntity> = new Map<
                    string,
                    IdTokenEntity
                >();
                idTokenMap.forEach((idToken, key) => {
                    if (idToken.realm === account.tenantId) {
                        homeIdTokenMap.set(key, idToken);
                    }
                });
                const numHomeIdTokens = homeIdTokenMap.size;
                if (numHomeIdTokens < 1) {
                    this.commonLogger.info(
                        "CacheManager:getIdToken - Multiple ID tokens found for account but none match account entity tenant id, returning first result",
                        correlationId
                    );
                    return idTokenMap.values().next().value ?? null;
                } else if (numHomeIdTokens === 1) {
                    this.commonLogger.info(
                        "CacheManager:getIdToken - Multiple ID tokens found for account, defaulting to home tenant profile",
                        correlationId
                    );
                    return homeIdTokenMap.values().next().value ?? null;
                } else {
                    // Multiple ID tokens for home tenant profile, remove all and return null
                    tokensToBeRemoved = homeIdTokenMap;
                }
            }
            // Multiple tokens for a single tenant profile, remove all and return null
            this.commonLogger.info(
                "CacheManager:getIdToken - Multiple matching ID tokens found, clearing them",
                correlationId
            );
            tokensToBeRemoved.forEach((idToken, key) => {
                this.removeIdToken(key, correlationId);
            });
            this.performanceClient.addFields(
                { multiMatchedID: idTokenMap.size },
                correlationId
            );
            return null;
        }

        this.commonLogger.info(
            "CacheManager:getIdToken - Returning ID token",
            correlationId
        );
        return idTokenMap.values().next().value ?? null;
    }

    /**
     * Gets all idTokens matching the given filter
     * @param filter
     * @returns
     */
    getIdTokensByFilter(
        filter: CredentialFilter,
        correlationId: string,
        tokenKeys?: TokenKeys
    ): Map<string, IdTokenEntity> {
        const idTokenKeys =
            (tokenKeys && tokenKeys.idToken) || this.getTokenKeys().idToken;

        const idTokens: Map<string, IdTokenEntity> = new Map<
            string,
            IdTokenEntity
        >();
        idTokenKeys.forEach((key) => {
            if (
                !this.idTokenKeyMatchesFilter(key, {
                    clientId: this.clientId,
                    ...filter,
                })
            ) {
                return;
            }
            const idToken = this.getIdTokenCredential(key, correlationId);
            if (
                idToken &&
                this.credentialMatchesFilter(idToken, filter, correlationId)
            ) {
                idTokens.set(key, idToken);
            }
        });

        return idTokens;
    }

    /**
     * Validate the cache key against filter before retrieving and parsing cache value
     * @param key
     * @param filter
     * @returns
     */
    idTokenKeyMatchesFilter(
        inputKey: string,
        filter: CredentialFilter
    ): boolean {
        const key = inputKey.toLowerCase();
        if (
            filter.clientId &&
            key.indexOf(filter.clientId.toLowerCase()) === -1
        ) {
            return false;
        }

        if (
            filter.homeAccountId &&
            key.indexOf(filter.homeAccountId.toLowerCase()) === -1
        ) {
            return false;
        }

        return true;
    }

    /**
     * Removes idToken from the cache
     * @param key
     */
    removeIdToken(key: string, correlationId: string): void {
        this.removeItem(key, correlationId);
    }

    /**
     * Removes refresh token from the cache
     * @param key
     */
    removeRefreshToken(key: string, correlationId: string): void {
        this.removeItem(key, correlationId);
    }

    /**
     * Retrieve AccessTokenEntity from cache
     * @param account {AccountInfo}
     * @param request {BaseAuthRequest}
     * @param tokenKeys {?TokenKeys}
     * @param performanceClient {?IPerformanceClient}
     */
    getAccessToken(
        account: AccountInfo,
        request: BaseAuthRequest,
        tokenKeys?: TokenKeys,
        targetRealm?: string
    ): AccessTokenEntity | null {
        const correlationId = request.correlationId;
        this.commonLogger.trace(
            "CacheManager - getAccessToken called",
            correlationId
        );
        const scopes = ScopeSet.createSearchScopes(request.scopes);
        const authScheme =
            request.authenticationScheme ||
            Constants.AuthenticationScheme.BEARER;
        /*
         * Distinguish between Bearer and PoP/SSH token cache types
         * Cast to lowercase to handle "bearer" from ADFS
         */
        const credentialType =
            authScheme &&
            authScheme.toLowerCase() !==
                Constants.AuthenticationScheme.BEARER.toLowerCase()
                ? Constants.CredentialType.ACCESS_TOKEN_WITH_AUTH_SCHEME
                : Constants.CredentialType.ACCESS_TOKEN;

        const accessTokenFilter: CredentialFilter = {
            homeAccountId: account.homeAccountId,
            environment: account.environment,
            credentialType: credentialType,
            clientId: this.clientId,
            realm: targetRealm || account.tenantId,
            target: scopes,
            tokenType: authScheme,
            keyId: request.sshKid,
        };

        const accessTokenKeys =
            (tokenKeys && tokenKeys.accessToken) ||
            this.getTokenKeys().accessToken;
        const accessTokens: AccessTokenEntity[] = [];

        accessTokenKeys.forEach((key) => {
            // Validate key
            if (
                this.accessTokenKeyMatchesFilter(key, accessTokenFilter, true)
            ) {
                const accessToken = this.getAccessTokenCredential(
                    key,
                    correlationId
                );

                // Validate value
                if (
                    accessToken &&
                    this.credentialMatchesFilter(
                        accessToken,
                        accessTokenFilter,
                        correlationId
                    )
                ) {
                    accessTokens.push(accessToken);
                }
            }
        });

        const numAccessTokens = accessTokens.length;
        if (numAccessTokens < 1) {
            this.commonLogger.info(
                "CacheManager:getAccessToken - No token found",
                correlationId
            );
            return null;
        } else if (numAccessTokens > 1) {
            this.commonLogger.info(
                "CacheManager:getAccessToken - Multiple access tokens found, clearing them",
                correlationId
            );
            accessTokens.forEach((accessToken) => {
                this.removeAccessToken(
                    this.generateCredentialKey(accessToken),
                    correlationId
                );
            });
            this.performanceClient.addFields(
                { multiMatchedAT: accessTokens.length },
                correlationId
            );
            return null;
        }

        this.commonLogger.info(
            "CacheManager:getAccessToken - Returning access token",
            correlationId
        );
        return accessTokens[0];
    }

    /**
     * Validate the cache key against filter before retrieving and parsing cache value
     * @param key
     * @param filter
     * @param keyMustContainAllScopes
     * @returns
     */
    accessTokenKeyMatchesFilter(
        inputKey: string,
        filter: CredentialFilter,
        keyMustContainAllScopes: boolean
    ): boolean {
        const key = inputKey.toLowerCase();
        if (
            filter.clientId &&
            key.indexOf(filter.clientId.toLowerCase()) === -1
        ) {
            return false;
        }

        if (
            filter.homeAccountId &&
            key.indexOf(filter.homeAccountId.toLowerCase()) === -1
        ) {
            return false;
        }

        if (filter.realm && key.indexOf(filter.realm.toLowerCase()) === -1) {
            return false;
        }

        if (filter.target) {
            const scopes = filter.target.asArray();
            for (let i = 0; i < scopes.length; i++) {
                if (
                    keyMustContainAllScopes &&
                    !key.includes(scopes[i].toLowerCase())
                ) {
                    // When performing a cache lookup a missing scope would be a cache miss
                    return false;
                } else if (
                    !keyMustContainAllScopes &&
                    key.includes(scopes[i].toLowerCase())
                ) {
                    // When performing a cache write, any token with a subset of requested scopes should be replaced
                    return true;
                }
            }
        }

        return true;
    }

    /**
     * Gets all access tokens matching the filter
     * @param filter
     * @returns
     */
    getAccessTokensByFilter(
        filter: CredentialFilter,
        correlationId: string
    ): AccessTokenEntity[] {
        const tokenKeys = this.getTokenKeys();

        const accessTokens: AccessTokenEntity[] = [];
        tokenKeys.accessToken.forEach((key) => {
            if (!this.accessTokenKeyMatchesFilter(key, filter, true)) {
                return;
            }

            const accessToken = this.getAccessTokenCredential(
                key,
                correlationId
            );
            if (
                accessToken &&
                this.credentialMatchesFilter(accessToken, filter, correlationId)
            ) {
                accessTokens.push(accessToken);
            }
        });

        return accessTokens;
    }

    /**
     * Helper to retrieve the appropriate refresh token from cache
     * @param account {AccountInfo}
     * @param familyRT {boolean}
     * @param tokenKeys {?TokenKeys}
     * @param performanceClient {?IPerformanceClient}
     * @param correlationId {?string}
     */
    getRefreshToken(
        account: AccountInfo,
        familyRT: boolean,
        correlationId: string,
        tokenKeys?: TokenKeys
    ): RefreshTokenEntity | null {
        this.commonLogger.trace(
            "CacheManager - getRefreshToken called",
            correlationId
        );
        const id = familyRT ? Constants.THE_FAMILY_ID : undefined;
        const refreshTokenFilter: CredentialFilter = {
            homeAccountId: account.homeAccountId,
            environment: account.environment,
            credentialType: Constants.CredentialType.REFRESH_TOKEN,
            clientId: this.clientId,
            familyId: id,
        };

        const refreshTokenKeys =
            (tokenKeys && tokenKeys.refreshToken) ||
            this.getTokenKeys().refreshToken;
        const refreshTokens: RefreshTokenEntity[] = [];

        refreshTokenKeys.forEach((key) => {
            // Validate key
            if (this.refreshTokenKeyMatchesFilter(key, refreshTokenFilter)) {
                const refreshToken = this.getRefreshTokenCredential(
                    key,
                    correlationId
                );
                // Validate value
                if (
                    refreshToken &&
                    this.credentialMatchesFilter(
                        refreshToken,
                        refreshTokenFilter,
                        correlationId
                    )
                ) {
                    refreshTokens.push(refreshToken);
                }
            }
        });

        const numRefreshTokens = refreshTokens.length;
        if (numRefreshTokens < 1) {
            this.commonLogger.info(
                "CacheManager:getRefreshToken - No refresh token found.",
                correlationId
            );
            return null;
        }
        // address the else case after remove functions address environment aliases

        if (numRefreshTokens > 1) {
            this.performanceClient.addFields(
                { multiMatchedRT: numRefreshTokens },
                correlationId
            );
        }

        this.commonLogger.info(
            "CacheManager:getRefreshToken - returning refresh token",
            correlationId
        );
        return refreshTokens[0] as RefreshTokenEntity;
    }

    /**
     * Validate the cache key against filter before retrieving and parsing cache value
     * @param key
     * @param filter
     */
    refreshTokenKeyMatchesFilter(
        inputKey: string,
        filter: CredentialFilter
    ): boolean {
        const key = inputKey.toLowerCase();
        if (
            filter.familyId &&
            key.indexOf(filter.familyId.toLowerCase()) === -1
        ) {
            return false;
        }

        // If familyId is used, clientId is not in the key
        if (
            !filter.familyId &&
            filter.clientId &&
            key.indexOf(filter.clientId.toLowerCase()) === -1
        ) {
            return false;
        }

        if (
            filter.homeAccountId &&
            key.indexOf(filter.homeAccountId.toLowerCase()) === -1
        ) {
            return false;
        }

        return true;
    }

    /**
     * Retrieve AppMetadataEntity from cache
     */
    readAppMetadataFromCache(
        environment: string,
        correlationId: string
    ): AppMetadataEntity | null {
        const appMetadataFilter: AppMetadataFilter = {
            environment,
            clientId: this.clientId,
        };

        const appMetadata: AppMetadataCache = this.getAppMetadataFilteredBy(
            appMetadataFilter,
            correlationId
        );
        const appMetadataEntries: AppMetadataEntity[] = Object.keys(
            appMetadata
        ).map((key) => appMetadata[key]);

        const numAppMetadata = appMetadataEntries.length;
        if (numAppMetadata < 1) {
            return null;
        } else if (numAppMetadata > 1) {
            throw createClientAuthError(
                ClientAuthErrorCodes.multipleMatchingAppMetadata
            );
        }

        return appMetadataEntries[0] as AppMetadataEntity;
    }

    /**
     * Return the family_id value associated  with FOCI
     * @param environment
     * @param clientId
     */
    isAppMetadataFOCI(environment: string, correlationId: string): boolean {
        const appMetadata = this.readAppMetadataFromCache(
            environment,
            correlationId
        );
        return !!(
            appMetadata && appMetadata.familyId === Constants.THE_FAMILY_ID
        );
    }

    /**
     * helper to match account ids
     * @param value
     * @param homeAccountId
     */
    private matchHomeAccountId(
        entity: AccountEntity | CredentialEntity,
        homeAccountId: string
    ): boolean {
        return !!(
            typeof entity.homeAccountId === "string" &&
            homeAccountId === entity.homeAccountId
        );
    }

    /**
     * helper to match account ids
     * @param entity
     * @param localAccountId
     * @returns
     */
    private matchLocalAccountIdFromTokenClaims(
        tokenClaims: TokenClaims,
        localAccountId: string
    ): boolean {
        const idTokenLocalAccountId = tokenClaims.oid || tokenClaims.sub;
        return localAccountId === idTokenLocalAccountId;
    }

    private matchLocalAccountIdFromTenantProfile(
        tenantProfile: TenantProfile,
        localAccountId: string
    ): boolean {
        return tenantProfile.localAccountId === localAccountId;
    }

    /**
     * helper to match names
     * @param entity
     * @param name
     * @returns true if the downcased name properties are present and match in the filter and the entity
     */
    private matchName(claims: TokenClaims, name: string): boolean {
        return !!(name.toLowerCase() === claims.name?.toLowerCase());
    }

    /**
     * helper to match usernames
     * @param entity
     * @param username
     * @returns
     */
    private matchUsername(
        cachedUsername?: string,
        filterUsername?: string
    ): boolean {
        return !!(
            cachedUsername &&
            typeof cachedUsername === "string" &&
            filterUsername?.toLowerCase() === cachedUsername.toLowerCase()
        );
    }

    /**
     * helper to match loginhints
     * @param entity
     * @param loginHint
     * @returns
     */
    private matchLoginHintWithTenantProfile(
        tenantProfile: TenantProfile,
        loginHintFilter: string
    ): boolean {
        return (
            tenantProfile.loginHint === loginHintFilter ||
            tenantProfile.username === loginHintFilter ||
            tenantProfile.upn === loginHintFilter
        );
    }

    /**
     * helper to match assertion
     * @param value
     * @param oboAssertion
     */
    private matchUserAssertionHash(
        entity: CredentialEntity,
        userAssertionHash: string
    ): boolean {
        return !!(
            entity.userAssertionHash &&
            userAssertionHash === entity.userAssertionHash
        );
    }

    /**
     * helper to match environment
     * @param value
     * @param environment
     */
    private matchEnvironment(
        entity: AccountEntity | CredentialEntity | AppMetadataEntity,
        environment: string,
        correlationId: string
    ): boolean {
        // Check static authority options first for cases where authority metadata has not been resolved and cached yet
        if (this.staticAuthorityOptions) {
            const staticAliases = getAliasesFromStaticSources(
                this.staticAuthorityOptions,
                this.commonLogger,
                correlationId
            );
            if (
                staticAliases.includes(environment) &&
                staticAliases.includes(entity.environment)
            ) {
                return true;
            }
        }

        // Query metadata cache if no static authority configuration has aliases that match enviroment
        const cloudMetadata = this.getAuthorityMetadataByAlias(
            environment,
            correlationId
        );
        if (
            cloudMetadata &&
            cloudMetadata.aliases.indexOf(entity.environment) > -1
        ) {
            return true;
        }
        return false;
    }

    /**
     * helper to match credential type
     * @param entity
     * @param credentialType
     */
    private matchCredentialType(
        entity: CredentialEntity,
        credentialType: string
    ): boolean {
        return (
            entity.credentialType &&
            credentialType.toLowerCase() === entity.credentialType.toLowerCase()
        );
    }

    /**
     * helper to match client ids
     * @param entity
     * @param clientId
     */
    private matchClientId(
        entity: CredentialEntity | AppMetadataEntity,
        clientId: string
    ): boolean {
        return !!(entity.clientId && clientId === entity.clientId);
    }

    /**
     * helper to match family ids
     * @param entity
     * @param familyId
     */
    private matchFamilyId(
        entity: CredentialEntity | AppMetadataEntity,
        familyId: string
    ): boolean {
        return !!(entity.familyId && familyId === entity.familyId);
    }

    /**
     * helper to match realm
     * @param entity
     * @param realm
     */
    private matchRealm(
        entity: AccountEntity | CredentialEntity,
        realm: string
    ): boolean {
        return !!(entity.realm?.toLowerCase() === realm.toLowerCase());
    }

    /**
     * helper to match nativeAccountId
     * @param entity
     * @param nativeAccountId
     * @returns boolean indicating the match result
     */
    private matchNativeAccountId(
        entity: AccountEntity,
        nativeAccountId: string
    ): boolean {
        return !!(
            entity.nativeAccountId && nativeAccountId === entity.nativeAccountId
        );
    }

    /**
     * helper to match loginHint which can be either:
     * 1. login_hint ID token claim
     * 2. username in cached account object
     * 3. upn in ID token claims
     * @param entity
     * @param loginHint
     * @returns
     */
    private matchLoginHintFromTokenClaims(
        tokenClaims: TokenClaims,
        loginHint: string
    ): boolean {
        if (tokenClaims.login_hint === loginHint) {
            return true;
        }

        if (tokenClaims.preferred_username === loginHint) {
            return true;
        }

        if (tokenClaims.upn === loginHint) {
            return true;
        }

        // check login hint against list of emails in token claims
        if (tokenClaims.emails && tokenClaims.emails.includes(loginHint)) {
            return true;
        }

        return false;
    }

    /**
     * Helper to match sid
     * @param entity
     * @param sid
     * @returns true if the sid claim is present and matches the filter
     */
    private matchSid(idTokenClaims: TokenClaims, sid: string): boolean {
        return idTokenClaims.sid === sid;
    }

    private matchAuthorityType(
        entity: AccountEntity,
        authorityType: string
    ): boolean {
        return !!(
            entity.authorityType &&
            authorityType.toLowerCase() === entity.authorityType.toLowerCase()
        );
    }

    /**
     * Returns true if the target scopes are a subset of the current entity's scopes, false otherwise.
     * @param entity
     * @param target
     */
    private matchTarget(entity: CredentialEntity, target: ScopeSet): boolean {
        const isNotAccessTokenCredential =
            entity.credentialType !== Constants.CredentialType.ACCESS_TOKEN &&
            entity.credentialType !==
                Constants.CredentialType.ACCESS_TOKEN_WITH_AUTH_SCHEME;

        if (isNotAccessTokenCredential || !entity.target) {
            return false;
        }

        const entityScopeSet: ScopeSet = ScopeSet.fromString(entity.target);

        return entityScopeSet.containsScopeSet(target);
    }

    /**
     * Returns true if the credential's tokenType or Authentication Scheme matches the one in the request, false otherwise
     * @param entity
     * @param tokenType
     */
    private matchTokenType(
        entity: CredentialEntity,
        tokenType: Constants.AuthenticationScheme
    ): boolean {
        return !!(entity.tokenType && entity.tokenType === tokenType);
    }

    /**
     * Returns true if the credential's keyId matches the one in the request, false otherwise
     * @param entity
     * @param keyId
     */
    private matchKeyId(entity: CredentialEntity, keyId: string): boolean {
        return !!(entity.keyId && entity.keyId === keyId);
    }

    /**
     * returns if a given cache entity is of the type appmetadata
     * @param key
     */
    private isAppMetadata(key: string): boolean {
        return key.indexOf(Constants.APP_METADATA) !== -1;
    }

    /**
     * returns if a given cache entity is of the type authoritymetadata
     * @param key
     */
    protected isAuthorityMetadata(key: string): boolean {
        return key.indexOf(Constants.AUTHORITY_METADATA_CACHE_KEY) !== -1;
    }

    /**
     * returns cache key used for cloud instance metadata
     */
    generateAuthorityMetadataCacheKey(authority: string): string {
        return `${Constants.AUTHORITY_METADATA_CACHE_KEY}-${this.clientId}-${authority}`;
    }

    /**
     * Helper to convert serialized data to object
     * @param obj
     * @param json
     */
    static toObject<T>(obj: T, json: object): T {
        for (const propertyName in json) {
            obj[propertyName] = json[propertyName];
        }
        return obj;
    }
}

/** @internal */
export class DefaultStorageClass extends CacheManager {
    async setAccount(): Promise<void> {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getAccount(): AccountEntity {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    async setIdTokenCredential(): Promise<void> {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getIdTokenCredential(): IdTokenEntity {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    async setAccessTokenCredential(): Promise<void> {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getAccessTokenCredential(): AccessTokenEntity {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    async setRefreshTokenCredential(): Promise<void> {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getRefreshTokenCredential(): RefreshTokenEntity {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    setAppMetadata(): void {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getAppMetadata(): AppMetadataEntity {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    setServerTelemetry(): void {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getServerTelemetry(): ServerTelemetryEntity {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    setAuthorityMetadata(): void {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getAuthorityMetadata(): AuthorityMetadataEntity | null {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getAuthorityMetadataKeys(): Array<string> {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    setThrottlingCache(): void {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getThrottlingCache(): ThrottlingEntity {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    removeItem(): boolean {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getKeys(): string[] {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getAccountKeys(): string[] {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    getTokenKeys(): TokenKeys {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    generateCredentialKey(): string {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
    generateAccountKey(): string {
        throw createClientAuthError(ClientAuthErrorCodes.methodNotImplemented);
    }
}
