let _level = null;

class Logger {
    static levels = ['error', 'warn', 'info', 'debug'];

    constructor(level) {
        if (!_level) {
            _level = level || 'debug';
        }

        this.isBrowser = typeof process === 'undefined'
            || process.type === 'renderer'
            || process.browser === true
            || process.__nwjs;
        if (!this.isBrowser) {
            this.colors = {
                start: '\x1b[2m',
                warn: '\x1b[35m',
                info: '\x1b[33m',
                debug: '\x1b[36m',
                error: '\x1b[31m',
                end: '\x1b[0m',
            };
        } else {
            this.colors = {
                start: '%c',
                warn: 'color : #ff00ff',
                info: 'color : #ffff00',
                debug: 'color : #00ffff',
                error: 'color : #ff0000',
                end: '',
            };
        }
        this.messageFormat = '[%t] [%l] - [%m]';
    }

    static setLevel(level) {
        _level = level;
    }

    /**
     *
     * @param level {string}
     * @returns {boolean}
     */
    canSend(level) {
        return (Logger.levels.indexOf(_level) >= Logger.levels.indexOf(level));
    }

    /**
     * @param message {string}
     */
    warn(message) {
        this._log('warn', message, this.colors.warn);
    }

    /**
     * @param message {string}
     */
    info(message) {
        this._log('info', message, this.colors.info);
    }

    /**
     * @param message {string}
     */
    debug(message) {
        this._log('debug', message, this.colors.debug);
    }

    /**
     * @param message {string}
     */
    error(message) {
        this._log('error', message, this.colors.error);
    }

    format(message, level) {
        return this.messageFormat.replace('%t', new Date().toISOString())
            .replace('%l', level.toUpperCase())
            .replace('%m', message);
    }

    /**
     * @param level {string}
     * @param message {string}
     * @param color {string}
     */
    _log(level, message, color) {
        if (!_level) {
            return;
        }
        if (this.canSend(level)) {
            if (!this.isBrowser) {
                console.log(color + this.format(message, level) + this.colors.end);
            } else {
                console.log(this.colors.start + this.format(message, level), color);
            }
        } else {

        }
    }
}

module.exports = Logger;