package logger

import (
	"os"
	"strings"

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

var globalLogger *zap.Logger
var globalSugared *zap.SugaredLogger

func init() {
	InitLogger(os.Getenv("LOG_LEVEL"))
}

// InitLogger initializes the global Zap logger with proper formatting and log levels.
func InitLogger(level string) *zap.Logger {
	zapLevel := zapcore.InfoLevel
	switch strings.ToLower(level) {
	case "debug":
		zapLevel = zapcore.DebugLevel
	case "warn", "warning":
		zapLevel = zapcore.WarnLevel
	case "error":
		zapLevel = zapcore.ErrorLevel
	}

	encoderConfig := zapcore.EncoderConfig{
		TimeKey:        "time",
		LevelKey:       "level",
		NameKey:        "logger",
		CallerKey:      "caller",
		MessageKey:     "msg",
		StacktraceKey:  "stacktrace",
		LineEnding:     zapcore.DefaultLineEnding,
		EncodeLevel:    zapcore.CapitalColorLevelEncoder,
		EncodeTime:     zapcore.TimeEncoderOfLayout("15:04:05.000"),
		EncodeDuration: zapcore.StringDurationEncoder,
		EncodeCaller:   zapcore.ShortCallerEncoder,
	}

	core := zapcore.NewCore(
		zapcore.NewConsoleEncoder(encoderConfig),
		zapcore.AddSync(os.Stdout),
		zapLevel,
	)

	globalLogger = zap.New(core, zap.AddCaller())
	globalSugared = globalLogger.Sugar()
	return globalLogger
}

// L returns the global zap logger instance.
func L() *zap.Logger {
	if globalLogger == nil {
		InitLogger("info")
	}
	return globalLogger
}

// S returns the global sugared logger instance.
func S() *zap.SugaredLogger {
	if globalSugared == nil {
		InitLogger("info")
	}
	return globalSugared
}

// Named creates a child logger with a component name tag.
func Named(name string) *zap.Logger {
	return L().Named(name)
}