/*! @azure/msal-common v14.4.0 2023-11-07 */
'use strict';
import { CacheOutcome, Constants, SERVER_TELEM_CONSTANTS, Separators } from '../../utils/Constants.mjs';
import { AuthError } from '../../error/AuthError.mjs';

/*
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
/** @internal */
class ServerTelemetryManager {
    constructor(telemetryRequest, cacheManager) {
        this.cacheOutcome = CacheOutcome.NOT_APPLICABLE;
        this.cacheManager = cacheManager;
        this.apiId = telemetryRequest.apiId;
        this.correlationId = telemetryRequest.correlationId;
        this.wrapperSKU = telemetryRequest.wrapperSKU || Constants.EMPTY_STRING;
        this.wrapperVer = telemetryRequest.wrapperVer || Constants.EMPTY_STRING;
        this.telemetryCacheKey =
            SERVER_TELEM_CONSTANTS.CACHE_KEY +
                Separators.CACHE_KEY_SEPARATOR +
                telemetryRequest.clientId;
    }
    /**
     * API to add MSER Telemetry to request
     */
    generateCurrentRequestHeaderValue() {
        const request = `${this.apiId}${SERVER_TELEM_CONSTANTS.VALUE_SEPARATOR}${this.cacheOutcome}`;
        const platformFields = [this.wrapperSKU, this.wrapperVer].join(SERVER_TELEM_CONSTANTS.VALUE_SEPARATOR);
        const regionDiscoveryFields = this.getRegionDiscoveryFields();
        const requestWithRegionDiscoveryFields = [
            request,
            regionDiscoveryFields,
        ].join(SERVER_TELEM_CONSTANTS.VALUE_SEPARATOR);
        return [
            SERVER_TELEM_CONSTANTS.SCHEMA_VERSION,
            requestWithRegionDiscoveryFields,
            platformFields,
        ].join(SERVER_TELEM_CONSTANTS.CATEGORY_SEPARATOR);
    }
    /**
     * API to add MSER Telemetry for the last failed request
     */
    generateLastRequestHeaderValue() {
        const lastRequests = this.getLastRequests();
        const maxErrors = ServerTelemetryManager.maxErrorsToSend(lastRequests);
        const failedRequests = lastRequests.failedRequests
            .slice(0, 2 * maxErrors)
            .join(SERVER_TELEM_CONSTANTS.VALUE_SEPARATOR);
        const errors = lastRequests.errors
            .slice(0, maxErrors)
            .join(SERVER_TELEM_CONSTANTS.VALUE_SEPARATOR);
        const errorCount = lastRequests.errors.length;
        // Indicate whether this header contains all data or partial data
        const overflow = maxErrors < errorCount
            ? SERVER_TELEM_CONSTANTS.OVERFLOW_TRUE
            : SERVER_TELEM_CONSTANTS.OVERFLOW_FALSE;
        const platformFields = [errorCount, overflow].join(SERVER_TELEM_CONSTANTS.VALUE_SEPARATOR);
        return [
            SERVER_TELEM_CONSTANTS.SCHEMA_VERSION,
            lastRequests.cacheHits,
            failedRequests,
            errors,
            platformFields,
        ].join(SERVER_TELEM_CONSTANTS.CATEGORY_SEPARATOR);
    }
    /**
     * API to cache token failures for MSER data capture
     * @param error
     */
    cacheFailedRequest(error) {
        const lastRequests = this.getLastRequests();
        if (lastRequests.errors.length >=
            SERVER_TELEM_CONSTANTS.MAX_CACHED_ERRORS) {
            // Remove a cached error to make room, first in first out
            lastRequests.failedRequests.shift(); // apiId
            lastRequests.failedRequests.shift(); // correlationId
            lastRequests.errors.shift();
        }
        lastRequests.failedRequests.push(this.apiId, this.correlationId);
        if (error instanceof Error && !!error && error.toString()) {
            if (error instanceof AuthError) {
                if (error.subError) {
                    lastRequests.errors.push(error.subError);
                }
                else if (error.errorCode) {
                    lastRequests.errors.push(error.errorCode);
                }
                else {
                    lastRequests.errors.push(error.toString());
                }
            }
            else {
                lastRequests.errors.push(error.toString());
            }
        }
        else {
            lastRequests.errors.push(SERVER_TELEM_CONSTANTS.UNKNOWN_ERROR);
        }
        this.cacheManager.setServerTelemetry(this.telemetryCacheKey, lastRequests);
        return;
    }
    /**
     * Update server telemetry cache entry by incrementing cache hit counter
     */
    incrementCacheHits() {
        const lastRequests = this.getLastRequests();
        lastRequests.cacheHits += 1;
        this.cacheManager.setServerTelemetry(this.telemetryCacheKey, lastRequests);
        return lastRequests.cacheHits;
    }
    /**
     * Get the server telemetry entity from cache or initialize a new one
     */
    getLastRequests() {
        const initialValue = {
            failedRequests: [],
            errors: [],
            cacheHits: 0,
        };
        const lastRequests = this.cacheManager.getServerTelemetry(this.telemetryCacheKey);
        return lastRequests || initialValue;
    }
    /**
     * Remove server telemetry cache entry
     */
    clearTelemetryCache() {
        const lastRequests = this.getLastRequests();
        const numErrorsFlushed = ServerTelemetryManager.maxErrorsToSend(lastRequests);
        const errorCount = lastRequests.errors.length;
        if (numErrorsFlushed === errorCount) {
            // All errors were sent on last request, clear Telemetry cache
            this.cacheManager.removeItem(this.telemetryCacheKey);
        }
        else {
            // Partial data was flushed to server, construct a new telemetry cache item with errors that were not flushed
            const serverTelemEntity = {
                failedRequests: lastRequests.failedRequests.slice(numErrorsFlushed * 2),
                errors: lastRequests.errors.slice(numErrorsFlushed),
                cacheHits: 0,
            };
            this.cacheManager.setServerTelemetry(this.telemetryCacheKey, serverTelemEntity);
        }
    }
    /**
     * Returns the maximum number of errors that can be flushed to the server in the next network request
     * @param serverTelemetryEntity
     */
    static maxErrorsToSend(serverTelemetryEntity) {
        let i;
        let maxErrors = 0;
        let dataSize = 0;
        const errorCount = serverTelemetryEntity.errors.length;
        for (i = 0; i < errorCount; i++) {
            // failedRequests parameter contains pairs of apiId and correlationId, multiply index by 2 to preserve pairs
            const apiId = serverTelemetryEntity.failedRequests[2 * i] ||
                Constants.EMPTY_STRING;
            const correlationId = serverTelemetryEntity.failedRequests[2 * i + 1] ||
                Constants.EMPTY_STRING;
            const errorCode = serverTelemetryEntity.errors[i] || Constants.EMPTY_STRING;
            // Count number of characters that would be added to header, each character is 1 byte. Add 3 at the end to account for separators
            dataSize +=
                apiId.toString().length +
                    correlationId.toString().length +
                    errorCode.length +
                    3;
            if (dataSize < SERVER_TELEM_CONSTANTS.MAX_LAST_HEADER_BYTES) {
                // Adding this entry to the header would still keep header size below the limit
                maxErrors += 1;
            }
            else {
                break;
            }
        }
        return maxErrors;
    }
    /**
     * Get the region discovery fields
     *
     * @returns string
     */
    getRegionDiscoveryFields() {
        const regionDiscoveryFields = [];
        regionDiscoveryFields.push(this.regionUsed || Constants.EMPTY_STRING);
        regionDiscoveryFields.push(this.regionSource || Constants.EMPTY_STRING);
        regionDiscoveryFields.push(this.regionOutcome || Constants.EMPTY_STRING);
        return regionDiscoveryFields.join(",");
    }
    /**
     * Update the region discovery metadata
     *
     * @param regionDiscoveryMetadata
     * @returns void
     */
    updateRegionDiscoveryMetadata(regionDiscoveryMetadata) {
        this.regionUsed = regionDiscoveryMetadata.region_used;
        this.regionSource = regionDiscoveryMetadata.region_source;
        this.regionOutcome = regionDiscoveryMetadata.region_outcome;
    }
    /**
     * Set cache outcome
     */
    setCacheOutcome(cacheOutcome) {
        this.cacheOutcome = cacheOutcome;
    }
}

export { ServerTelemetryManager };
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