// 工具类
class Utils {
    constructor() {
        this.logLevels = {
            debug: 0,
            info: 1,
            warn: 2,
            error: 3
        };
        this.currentLogLevel = this.logLevels[GameConfig.debug.logLevel];
    }

    // 日志记录
    log(level, message, ...args) {
        if (!GameConfig.debug.enableLogging) return;
        
        const levelNum = this.logLevels[level];
        if (levelNum >= this.currentLogLevel) {
            const timestamp = new Date().toISOString();
            const prefix = `[${timestamp}] [${level.toUpperCase()}]`;
            
            switch (level) {
                case 'debug':
                    console.debug(prefix, message, ...args);
                    break;
                case 'info':
                    console.info(prefix, message, ...args);
                    break;
                case 'warn':
                    console.warn(prefix, message, ...args);
                    break;
                case 'error':
                    console.error(prefix, message, ...args);
                    break;
            }
        }
    }

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

    info(message, ...args) {
        this.log('info', message, ...args);
    }

    warn(message, ...args) {
        this.log('warn', message, ...args);
    }

    error(message, ...args) {
        this.log('error', message, ...args);
    }

    // 性能监控
    measurePerformance(name, fn) {
        const start = performance.now();
        const result = fn();
        const end = performance.now();
        const duration = end - start;
        
        this.debug(`Performance [${name}]: ${duration.toFixed(2)}ms`);
        return { result, duration };
    }

    // 防抖函数
    debounce(func, wait) {
        let timeout;
        return function executedFunction(...args) {
            const later = () => {
                clearTimeout(timeout);
                func(...args);
            };
            clearTimeout(timeout);
            timeout = setTimeout(later, wait);
        };
    }

    // 节流函数
    throttle(func, limit) {
        let inThrottle;
        return function() {
            const args = arguments;
            const context = this;
            if (!inThrottle) {
                func.apply(context, args);
                inThrottle = true;
                setTimeout(() => inThrottle = false, limit);
            }
        };
    }

    // 坐标验证
    validateCoordinates(x, y, maxX = 400, maxY = 400) {
        // 坐标系以左下角为原点，x轴从左到右，y轴从下到上
        return x >= 0 && x <= maxX && y >= 0 && y <= maxY;
    }

    // 随机颜色生成
    generateRandomColor() {
        const colors = [
            '#ff6b6b', '#4ecdc4', '#45b7d1', '#96ceb4', 
            '#feca57', '#ff9ff3', '#54a0ff', '#5f27cd'
        ];
        return colors[Math.floor(Math.random() * colors.length)];
    }

    // 格式化时间
    formatTime(ms) {
        if (ms < 1000) return `${ms}ms`;
        if (ms < 60000) return `${(ms / 1000).toFixed(1)}s`;
        return `${(ms / 60000).toFixed(1)}m`;
    }

    // 格式化字节大小
    formatBytes(bytes) {
        if (bytes === 0) return '0 Bytes';
        const k = 1024;
        const sizes = ['Bytes', 'KB', 'MB', 'GB'];
        const i = Math.floor(Math.log(bytes) / Math.log(k));
        return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
    }

    // 深拷贝
    deepClone(obj) {
        if (obj === null || typeof obj !== 'object') return obj;
        if (obj instanceof Date) return new Date(obj.getTime());
        if (obj instanceof Array) return obj.map(item => this.deepClone(item));
        if (typeof obj === 'object') {
            const clonedObj = {};
            for (const key in obj) {
                if (obj.hasOwnProperty(key)) {
                    clonedObj[key] = this.deepClone(obj[key]);
                }
            }
            return clonedObj;
        }
    }

    // 本地存储工具
    storage = {
        set(key, value) {
            try {
                localStorage.setItem(key, JSON.stringify(value));
            } catch (error) {
                console.error('Failed to save to localStorage:', error);
            }
        },

        get(key, defaultValue = null) {
            try {
                const item = localStorage.getItem(key);
                return item ? JSON.parse(item) : defaultValue;
            } catch (error) {
                console.error('Failed to read from localStorage:', error);
                return defaultValue;
            }
        },

        remove(key) {
            try {
                localStorage.removeItem(key);
            } catch (error) {
                console.error('Failed to remove from localStorage:', error);
            }
        }
    };

    // 网络状态检测
    checkNetworkStatus() {
        return navigator.onLine;
    }

    // 设备信息
    getDeviceInfo() {
        return {
            userAgent: navigator.userAgent,
            platform: navigator.platform,
            language: navigator.language,
            cookieEnabled: navigator.cookieEnabled,
            onLine: navigator.onLine,
            screenWidth: screen.width,
            screenHeight: screen.height,
            windowWidth: window.innerWidth,
            windowHeight: window.innerHeight
        };
    }

    // 错误处理
    handleError(error, context = '') {
        this.error(`Error in ${context}:`, error);
        
        // 可以在这里添加错误上报逻辑
        if (GameConfig.debug.showConnectionDetails) {
            console.group('Error Details');
            console.error('Error:', error);
            console.error('Context:', context);
            console.error('Stack:', error.stack);
            console.error('Device Info:', this.getDeviceInfo());
            console.groupEnd();
        }
    }
}

// 创建全局工具实例
const utils = new Utils();

// 导出工具类
if (typeof module !== 'undefined' && module.exports) {
    module.exports = Utils;
} else {
    window.Utils = Utils;
    window.utils = utils;
}