package logger

import (
	"os"

	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
)

// NewLogger creates a production-grade logger with appropriate configuration
func NewLogger(isDevelopment bool) (*zap.Logger, error) {
    var config zap.Config

    if isDevelopment {
        config = zap.NewDevelopmentConfig()
        config.EncoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder
    } else {
        config = zap.NewProductionConfig()
        config.EncoderConfig.TimeKey = "timestamp"
        config.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
    }

    // 👇 关键修改：直接拉到 Fatal 级别
    // 这样 Error, Warn, Info, Debug 全部都会被忽略
    // 彻底消除 IO 锁竞争
    config.Level = zap.NewAtomicLevelAt(zapcore.FatalLevel)

    logger, err := config.Build()
    if err != nil {
        return nil, err
    }

    return logger, nil
}

// NewLoggerFromEnv creates logger based on environment
func NewLoggerFromEnv() (*zap.Logger, error) {
	env := os.Getenv("ENVIRONMENT")
	isDev := env == "" || env == "development" || env == "dev"
	return NewLogger(isDev)
}