'use strict';

var browser = require('../../../_virtual/browser.js');
var common = require('./common.js');

/* eslint-env browser */

var hasRequiredBrowser;

function requireBrowser () {
	if (hasRequiredBrowser) return browser.__module.exports;
	hasRequiredBrowser = 1;
	(function (module, exports) {
		/**
		 * This is the web browser implementation of `debug()`.
		 */

		exports.formatArgs = formatArgs;
		exports.save = save;
		exports.load = load;
		exports.useColors = useColors;
		exports.storage = localstorage();
		exports.destroy = (() => {
			let warned = false;

			return () => {
				if (!warned) {
					warned = true;
					console.warn('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 = [
			'#0000CC',
			'#0000FF',
			'#0033CC',
			'#0033FF',
			'#0066CC',
			'#0066FF',
			'#0099CC',
			'#0099FF',
			'#00CC00',
			'#00CC33',
			'#00CC66',
			'#00CC99',
			'#00CCCC',
			'#00CCFF',
			'#3300CC',
			'#3300FF',
			'#3333CC',
			'#3333FF',
			'#3366CC',
			'#3366FF',
			'#3399CC',
			'#3399FF',
			'#33CC00',
			'#33CC33',
			'#33CC66',
			'#33CC99',
			'#33CCCC',
			'#33CCFF',
			'#6600CC',
			'#6600FF',
			'#6633CC',
			'#6633FF',
			'#66CC00',
			'#66CC33',
			'#9900CC',
			'#9900FF',
			'#9933CC',
			'#9933FF',
			'#99CC00',
			'#99CC33',
			'#CC0000',
			'#CC0033',
			'#CC0066',
			'#CC0099',
			'#CC00CC',
			'#CC00FF',
			'#CC3300',
			'#CC3333',
			'#CC3366',
			'#CC3399',
			'#CC33CC',
			'#CC33FF',
			'#CC6600',
			'#CC6633',
			'#CC9900',
			'#CC9933',
			'#CCCC00',
			'#CCCC33',
			'#FF0000',
			'#FF0033',
			'#FF0066',
			'#FF0099',
			'#FF00CC',
			'#FF00FF',
			'#FF3300',
			'#FF3333',
			'#FF3366',
			'#FF3399',
			'#FF33CC',
			'#FF33FF',
			'#FF6600',
			'#FF6633',
			'#FF9900',
			'#FF9933',
			'#FFCC00',
			'#FFCC33'
		];

		/**
		 * Currently only WebKit-based Web Inspectors, Firefox >= v31,
		 * and the Firebug extension (any Firefox version) are known
		 * to support "%c" CSS customizations.
		 *
		 * TODO: add a `localStorage` variable to explicitly enable/disable colors
		 */

		// eslint-disable-next-line complexity
		function useColors() {
			// NB: In an Electron preload script, document will be defined but not fully
			// initialized. Since we know we're in Chrome, we'll just detect this case
			// explicitly
			if (typeof window !== 'undefined' && window.process && (window.process.type === 'renderer' || window.process.__nwjs)) {
				return true;
			}

			// Internet Explorer and Edge do not support colors.
			if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
				return false;
			}

			// Is webkit? http://stackoverflow.com/a/16459606/376773
			// document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
			return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
				// Is firebug? http://stackoverflow.com/a/398120/376773
				(typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
				// Is firefox >= v31?
				// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
				(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
				// Double check webkit in userAgent just in case we are in a worker
				(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
		}

		/**
		 * Colorize log arguments if enabled.
		 *
		 * @api public
		 */

		function formatArgs(args) {
			args[0] = (this.useColors ? '%c' : '') +
				this.namespace +
				(this.useColors ? ' %c' : ' ') +
				args[0] +
				(this.useColors ? '%c ' : ' ') +
				'+' + module.exports.humanize(this.diff);

			if (!this.useColors) {
				return;
			}

			const c = 'color: ' + this.color;
			args.splice(1, 0, c, 'color: inherit');

			// The final "%c" is somewhat tricky, because there could be other
			// arguments passed either before or after the %c, so we need to
			// figure out the correct index to insert the CSS into
			let index = 0;
			let lastC = 0;
			args[0].replace(/%[a-zA-Z%]/g, match => {
				if (match === '%%') {
					return;
				}
				index++;
				if (match === '%c') {
					// We only are interested in the *last* %c
					// (the user may have provided their own)
					lastC = index;
				}
			});

			args.splice(lastC, 0, c);
		}

		/**
		 * Invokes `console.debug()` when available.
		 * No-op when `console.debug` is not a "function".
		 * If `console.debug` is not available, falls back
		 * to `console.log`.
		 *
		 * @api public
		 */
		exports.log = console.debug || console.log || (() => {});

		/**
		 * Save `namespaces`.
		 *
		 * @param {String} namespaces
		 * @api private
		 */
		function save(namespaces) {
			try {
				if (namespaces) {
					exports.storage.setItem('debug', namespaces);
				} else {
					exports.storage.removeItem('debug');
				}
			} catch (error) {
				// Swallow
				// XXX (@Qix-) should we be logging these?
			}
		}

		/**
		 * Load `namespaces`.
		 *
		 * @return {String} returns the previously persisted debug modes
		 * @api private
		 */
		function load() {
			let r;
			try {
				r = exports.storage.getItem('debug');
			} catch (error) {
				// Swallow
				// XXX (@Qix-) should we be logging these?
			}

			// If debug isn't set in LS, and we're in Electron, try to load $DEBUG
			if (!r && typeof process !== 'undefined' && 'env' in process) {
				r = process.env.DEBUG;
			}

			return r;
		}

		/**
		 * Localstorage attempts to return the localstorage.
		 *
		 * This is necessary because safari throws
		 * when a user disables cookies/localstorage
		 * and you attempt to access it.
		 *
		 * @return {LocalStorage}
		 * @api private
		 */

		function localstorage() {
			try {
				// TVMLKit (Apple TV JS Runtime) does not have a window object, just localStorage in the global context
				// The Browser also has localStorage in the global context.
				return localStorage;
			} catch (error) {
				// Swallow
				// XXX (@Qix-) should we be logging these?
			}
		}

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

		const {formatters} = module.exports;

		/**
		 * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
		 */

		formatters.j = function (v) {
			try {
				return JSON.stringify(v);
			} catch (error) {
				return '[UnexpectedJSONParseError]: ' + error.message;
			}
		}; 
	} (browser.__module, browser.__module.exports));
	return browser.__module.exports;
}

exports.__require = requireBrowser;
