// ZCLAW 日志系统
type LogLevel = 'debug' | 'info' | 'warn' | 'error';

const LEVEL_PRIORITY: Record<LogLevel, number> = {
  debug: 0,
  info: 1,
  warn: 2,
  error: 3,
};

const LEVEL_COLORS: Record<LogLevel, string> = {
  debug: '\x1b[36m', // cyan
  info: '\x1b[32m',  // green
  warn: '\x1b[33m',  // yellow
  error: '\x1b[31m', // red
};

const RESET = '\x1b[0m';

let currentLevel: LogLevel = 'info';

export function setLogLevel(level: LogLevel): void {
  currentLevel = level;
}

function shouldLog(level: LogLevel): boolean {
  return LEVEL_PRIORITY[level] >= LEVEL_PRIORITY[currentLevel];
}

function formatTimestamp(): string {
  return new Date().toISOString().slice(11, 23);
}

function log(level: LogLevel, module: string, message: string, data?: any): void {
  if (!shouldLog(level)) return;

  const color = LEVEL_COLORS[level];
  const timestamp = formatTimestamp();
  const prefix = `${color}[${timestamp}] [${level.toUpperCase()}] [${module}]${RESET}`;

  if (data !== undefined) {
    console.log(`${prefix} ${message}`, typeof data === 'object' ? JSON.stringify(data, null, 2) : data);
  } else {
    console.log(`${prefix} ${message}`);
  }
}

export function createLogger(module: string) {
  return {
    debug: (message: string, data?: any) => log('debug', module, message, data),
    info: (message: string, data?: any) => log('info', module, message, data),
    warn: (message: string, data?: any) => log('warn', module, message, data),
    error: (message: string, data?: any) => log('error', module, message, data),
  };
}

export type Logger = ReturnType<typeof createLogger>;