(function () {
    const originalConsole = {
        debug: console.debug.bind(console),
        log: console.log.bind(console),
        info: console.info.bind(console),
        warn: console.warn.bind(console),
        error: console.error.bind(console)
    };

    const levels = {
        silent: 0,
        error: 1,
        warn: 2,
        info: 3,
        debug: 4
    };

    function readLevel() {
        const params = new URLSearchParams(window.location.search);
        const queryLevel = params.get('log') || params.get('debug');
        if (queryLevel === '1' || queryLevel === 'true') return 'debug';
        if (queryLevel && levels[queryLevel]) return queryLevel;

        const savedLevel = localStorage.getItem('ai-if-log-level');
        if (savedLevel && Object.prototype.hasOwnProperty.call(levels, savedLevel)) {
            return savedLevel;
        }

        return 'warn';
    }

    const logger = {
        level: readLevel(),
        levels,
        originalConsole,

        setLevel(level) {
            if (!Object.prototype.hasOwnProperty.call(levels, level)) {
                originalConsole.warn(`Unknown log level "${level}". Use silent, error, warn, info, or debug.`);
                return;
            }
            this.level = level;
            localStorage.setItem('ai-if-log-level', level);
            originalConsole.info(`AI IF log level set to ${level}`);
        },

        shouldPrint(level) {
            return levels[this.level] >= levels[level];
        },

        write(level, args) {
            if (!this.shouldPrint(level)) return;
            const writer = originalConsole[level] || originalConsole.log;
            writer(...args);
        },

        debug(...args) {
            this.write('debug', args);
        },

        log(...args) {
            this.write('debug', args);
        },

        info(...args) {
            this.write('info', args);
        },

        warn(...args) {
            this.write('warn', args);
        },

        error(...args) {
            this.write('error', args);
        }
    };

    console.debug = (...args) => logger.debug(...args);
    console.log = (...args) => logger.log(...args);
    console.info = (...args) => logger.info(...args);
    console.warn = (...args) => logger.warn(...args);
    console.error = (...args) => logger.error(...args);

    window.AppLogger = logger;
})();