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'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var os = require('os');
var util = require('util');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var util__default = /*#__PURE__*/_interopDefaultLegacy(util);

// Copyright (c) Microsoft Corporation.
function log(message, ...args) {
    process.stderr.write(`${util__default["default"].format(message, ...args)}${os.EOL}`);
}

// Copyright (c) Microsoft Corporation.
const debugEnvVariable = (typeof process !== "undefined" && process.env && process.env.DEBUG) || undefined;
let enabledString;
let enabledNamespaces = [];
let skippedNamespaces = [];
const debuggers = [];
if (debugEnvVariable) {
    enable(debugEnvVariable);
}
const debugObj = Object.assign((namespace) => {
    return createDebugger(namespace);
}, {
    enable,
    enabled,
    disable,
    log,
});
function enable(namespaces) {
    enabledString = namespaces;
    enabledNamespaces = [];
    skippedNamespaces = [];
    const wildcard = /\*/g;
    const namespaceList = namespaces.split(",").map((ns) => ns.trim().replace(wildcard, ".*?"));
    for (const ns of namespaceList) {
        if (ns.startsWith("-")) {
            skippedNamespaces.push(new RegExp(`^${ns.substr(1)}$`));
        }
        else {
            enabledNamespaces.push(new RegExp(`^${ns}$`));
        }
    }
    for (const instance of debuggers) {
        instance.enabled = enabled(instance.namespace);
    }
}
function enabled(namespace) {
    if (namespace.endsWith("*")) {
        return true;
    }
    for (const skipped of skippedNamespaces) {
        if (skipped.test(namespace)) {
            return false;
        }
    }
    for (const enabledNamespace of enabledNamespaces) {
        if (enabledNamespace.test(namespace)) {
            return true;
        }
    }
    return false;
}
function disable() {
    const result = enabledString || "";
    enable("");
    return result;
}
function createDebugger(namespace) {
    const newDebugger = Object.assign(debug, {
        enabled: enabled(namespace),
        destroy,
        log: debugObj.log,
        namespace,
        extend,
    });
    function debug(...args) {
        if (!newDebugger.enabled) {
            return;
        }
        if (args.length > 0) {
            args[0] = `${namespace} ${args[0]}`;
        }
        newDebugger.log(...args);
    }
    debuggers.push(newDebugger);
    return newDebugger;
}
function destroy() {
    const index = debuggers.indexOf(this);
    if (index >= 0) {
        debuggers.splice(index, 1);
        return true;
    }
    return false;
}
function extend(namespace) {
    const newDebugger = createDebugger(`${this.namespace}:${namespace}`);
    newDebugger.log = this.log;
    return newDebugger;
}
var debug = debugObj;

// Copyright (c) Microsoft Corporation.
const registeredLoggers = new Set();
const logLevelFromEnv = (typeof process !== "undefined" && process.env && process.env.AZURE_LOG_LEVEL) || undefined;
let azureLogLevel;
/**
 * The AzureLogger provides a mechanism for overriding where logs are output to.
 * By default, logs are sent to stderr.
 * Override the `log` method to redirect logs to another location.
 */
const AzureLogger = debug("azure");
AzureLogger.log = (...args) => {
    debug.log(...args);
};
const AZURE_LOG_LEVELS = ["verbose", "info", "warning", "error"];
if (logLevelFromEnv) {
    // avoid calling setLogLevel because we don't want a mis-set environment variable to crash
    if (isAzureLogLevel(logLevelFromEnv)) {
        setLogLevel(logLevelFromEnv);
    }
    else {
        console.error(`AZURE_LOG_LEVEL set to unknown log level '${logLevelFromEnv}'; logging is not enabled. Acceptable values: ${AZURE_LOG_LEVELS.join(", ")}.`);
    }
}
/**
 * Immediately enables logging at the specified log level. If no level is specified, logging is disabled.
 * @param level - The log level to enable for logging.
 * Options from most verbose to least verbose are:
 * - verbose
 * - info
 * - warning
 * - error
 */
function setLogLevel(level) {
    if (level && !isAzureLogLevel(level)) {
        throw new Error(`Unknown log level '${level}'. Acceptable values: ${AZURE_LOG_LEVELS.join(",")}`);
    }
    azureLogLevel = level;
    const enabledNamespaces = [];
    for (const logger of registeredLoggers) {
        if (shouldEnable(logger)) {
            enabledNamespaces.push(logger.namespace);
        }
    }
    debug.enable(enabledNamespaces.join(","));
}
/**
 * Retrieves the currently specified log level.
 */
function getLogLevel() {
    return azureLogLevel;
}
const levelMap = {
    verbose: 400,
    info: 300,
    warning: 200,
    error: 100,
};
/**
 * Creates a logger for use by the Azure SDKs that inherits from `AzureLogger`.
 * @param namespace - The name of the SDK package.
 * @hidden
 */
function createClientLogger(namespace) {
    const clientRootLogger = AzureLogger.extend(namespace);
    patchLogMethod(AzureLogger, clientRootLogger);
    return {
        error: createLogger(clientRootLogger, "error"),
        warning: createLogger(clientRootLogger, "warning"),
        info: createLogger(clientRootLogger, "info"),
        verbose: createLogger(clientRootLogger, "verbose"),
    };
}
function patchLogMethod(parent, child) {
    child.log = (...args) => {
        parent.log(...args);
    };
}
function createLogger(parent, level) {
    const logger = Object.assign(parent.extend(level), {
        level,
    });
    patchLogMethod(parent, logger);
    if (shouldEnable(logger)) {
        const enabledNamespaces = debug.disable();
        debug.enable(enabledNamespaces + "," + logger.namespace);
    }
    registeredLoggers.add(logger);
    return logger;
}
function shouldEnable(logger) {
    return Boolean(azureLogLevel && levelMap[logger.level] <= levelMap[azureLogLevel]);
}
function isAzureLogLevel(logLevel) {
    return AZURE_LOG_LEVELS.includes(logLevel);
}

exports.AzureLogger = AzureLogger;
exports.createClientLogger = createClientLogger;
exports.getLogLevel = getLogLevel;
exports.setLogLevel = setLogLevel;
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