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export type LogLevel = 'debug' | 'info' | 'warn' | 'error'; const levelOrder: Record<LogLevel, number> = { debug: 10, info: 20, warn: 30, error: 40, }; const envLevel = (process.env.LOG_LEVEL as LogLevel) || 'info'; export class Logger { constructor(private readonly level: LogLevel = envLevel) {} private shouldLog(level: LogLevel): boolean { return levelOrder[level] >= levelOrder[this.level]; } private format(message: string, context?: Record<string, unknown>) { return { timestamp: new Date().toISOString(), level: this.level, message, ...context, }; } debug(message: string, context?: Record<string, unknown>) { if (this.shouldLog('debug')) console.debug(JSON.stringify(this.format(message, context))); } info(message: string, context?: Record<string, unknown>) { if (this.shouldLog('info')) console.info(JSON.stringify(this.format(message, context))); } warn(message: string, context?: Record<string, unknown>) { if (this.shouldLog('warn')) console.warn(JSON.stringify(this.format(message, context))); } error(message: string, context?: Record<string, unknown>) { if (this.shouldLog('error')) console.error(JSON.stringify(this.format(message, context))); } } export const logger = new Logger();