package logger

import (
	"io"
	"log/slog"
	"os"
	"time"

	"github.com/lmittmann/tint"
)

var (
	// Default logger is a tinted logger that writes to stdout
	defaultLogger *slog.Logger

	// Debug flag controls verbose logging
	debugMode bool
)

// Init initializes the global logger with the specified debug level
func Init(debug bool) {
	debugMode = debug

	// Set the minimum log level based on debug mode
	level := slog.LevelInfo
	if debug {
		level = slog.LevelDebug
	}

	// Create a tinted logger with time, level, and source
	defaultLogger = slog.New(
		tint.NewHandler(os.Stdout, &tint.Options{
			Level:      level,
			TimeFormat: time.RFC3339,
			AddSource:  debug,
		}),
	)

	// Set the default slog logger
	slog.SetDefault(defaultLogger)
}

// InitWithWriter initializes the logger with a custom writer (useful for testing)
func InitWithWriter(w io.Writer, debug bool) {
	debugMode = debug

	level := slog.LevelInfo
	if debug {
		level = slog.LevelDebug
	}

	defaultLogger = slog.New(
		tint.NewHandler(w, &tint.Options{
			Level:      level,
			TimeFormat: time.RFC3339,
			AddSource:  debug,
		}),
	)

	slog.SetDefault(defaultLogger)
}

// IsDebug returns true if debug mode is enabled
func IsDebug() bool {
	return debugMode
}

// Debug logs a message at debug level
func Debug(msg string, args ...any) {
	slog.Debug(msg, args...)
}

// Info logs a message at info level
func Info(msg string, args ...any) {
	slog.Info(msg, args...)
}

// Warn logs a message at warn level
func Warn(msg string, args ...any) {
	slog.Warn(msg, args...)
}

// Error logs a message at error level
func Error(msg string, args ...any) {
	slog.Error(msg, args...)
}

// With returns a new logger with the given attributes
func With(args ...any) *slog.Logger {
	return slog.With(args...)
}