'use strict';

var node = require('../../../_virtual/node.js');
var require$$1 = require('tty');
var require$$0 = require('util');
var index = require('../../supports-color/index.js');
var common = require('./common.js');

/**
 * Module dependencies.
 */

var hasRequiredNode;

function requireNode () {
	if (hasRequiredNode) return node.__module.exports;
	hasRequiredNode = 1;
	(function (module, exports) {
		const tty = require$$1;
		const util = require$$0;

		/**
		 * This is the Node.js implementation of `debug()`.
		 */

		exports.init = init;
		exports.log = log;
		exports.formatArgs = formatArgs;
		exports.save = save;
		exports.load = load;
		exports.useColors = useColors;
		exports.destroy = util.deprecate(
			() => {},
			'Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.'
		);

		/**
		 * Colors.
		 */

		exports.colors = [6, 2, 3, 4, 5, 1];

		try {
			// Optional dependency (as in, doesn't need to be installed, NOT like optionalDependencies in package.json)
			// eslint-disable-next-line import/no-extraneous-dependencies
			const supportsColor = index.__require();

			if (supportsColor && (supportsColor.stderr || supportsColor).level >= 2) {
				exports.colors = [
					20,
					21,
					26,
					27,
					32,
					33,
					38,
					39,
					40,
					41,
					42,
					43,
					44,
					45,
					56,
					57,
					62,
					63,
					68,
					69,
					74,
					75,
					76,
					77,
					78,
					79,
					80,
					81,
					92,
					93,
					98,
					99,
					112,
					113,
					128,
					129,
					134,
					135,
					148,
					149,
					160,
					161,
					162,
					163,
					164,
					165,
					166,
					167,
					168,
					169,
					170,
					171,
					172,
					173,
					178,
					179,
					184,
					185,
					196,
					197,
					198,
					199,
					200,
					201,
					202,
					203,
					204,
					205,
					206,
					207,
					208,
					209,
					214,
					215,
					220,
					221
				];
			}
		} catch (error) {
			// Swallow - we only care if `supports-color` is available; it doesn't have to be.
		}

		/**
		 * Build up the default `inspectOpts` object from the environment variables.
		 *
		 *   $ DEBUG_COLORS=no DEBUG_DEPTH=10 DEBUG_SHOW_HIDDEN=enabled node script.js
		 */

		exports.inspectOpts = Object.keys(process.env).filter(key => {
			return /^debug_/i.test(key);
		}).reduce((obj, key) => {
			// Camel-case
			const prop = key
				.substring(6)
				.toLowerCase()
				.replace(/_([a-z])/g, (_, k) => {
					return k.toUpperCase();
				});

			// Coerce string value into JS value
			let val = process.env[key];
			if (/^(yes|on|true|enabled)$/i.test(val)) {
				val = true;
			} else if (/^(no|off|false|disabled)$/i.test(val)) {
				val = false;
			} else if (val === 'null') {
				val = null;
			} else {
				val = Number(val);
			}

			obj[prop] = val;
			return obj;
		}, {});

		/**
		 * Is stdout a TTY? Colored output is enabled when `true`.
		 */

		function useColors() {
			return 'colors' in exports.inspectOpts ?
				Boolean(exports.inspectOpts.colors) :
				tty.isatty(process.stderr.fd);
		}

		/**
		 * Adds ANSI color escape codes if enabled.
		 *
		 * @api public
		 */

		function formatArgs(args) {
			const {namespace: name, useColors} = this;

			if (useColors) {
				const c = this.color;
				const colorCode = '\u001B[3' + (c < 8 ? c : '8;5;' + c);
				const prefix = `  ${colorCode};1m${name} \u001B[0m`;

				args[0] = prefix + args[0].split('\n').join('\n' + prefix);
				args.push(colorCode + 'm+' + module.exports.humanize(this.diff) + '\u001B[0m');
			} else {
				args[0] = getDate() + name + ' ' + args[0];
			}
		}

		function getDate() {
			if (exports.inspectOpts.hideDate) {
				return '';
			}
			return new Date().toISOString() + ' ';
		}

		/**
		 * Invokes `util.formatWithOptions()` with the specified arguments and writes to stderr.
		 */

		function log(...args) {
			return process.stderr.write(util.formatWithOptions(exports.inspectOpts, ...args) + '\n');
		}

		/**
		 * Save `namespaces`.
		 *
		 * @param {String} namespaces
		 * @api private
		 */
		function save(namespaces) {
			if (namespaces) {
				process.env.DEBUG = namespaces;
			} else {
				// If you set a process.env field to null or undefined, it gets cast to the
				// string 'null' or 'undefined'. Just delete instead.
				delete process.env.DEBUG;
			}
		}

		/**
		 * Load `namespaces`.
		 *
		 * @return {String} returns the previously persisted debug modes
		 * @api private
		 */

		function load() {
			return process.env.DEBUG;
		}

		/**
		 * Init logic for `debug` instances.
		 *
		 * Create a new `inspectOpts` object in case `useColors` is set
		 * differently for a particular `debug` instance.
		 */

		function init(debug) {
			debug.inspectOpts = {};

			const keys = Object.keys(exports.inspectOpts);
			for (let i = 0; i < keys.length; i++) {
				debug.inspectOpts[keys[i]] = exports.inspectOpts[keys[i]];
			}
		}

		module.exports = common.__require()(exports);

		const {formatters} = module.exports;

		/**
		 * Map %o to `util.inspect()`, all on a single line.
		 */

		formatters.o = function (v) {
			this.inspectOpts.colors = this.useColors;
			return util.inspect(v, this.inspectOpts)
				.split('\n')
				.map(str => str.trim())
				.join(' ');
		};

		/**
		 * Map %O to `util.inspect()`, allowing multiple lines if needed.
		 */

		formatters.O = function (v) {
			this.inspectOpts.colors = this.useColors;
			return util.inspect(v, this.inspectOpts);
		}; 
	} (node.__module, node.__module.exports));
	return node.__module.exports;
}

exports.__require = requireNode;
