package logging

import (
	"log/slog"
	"os"
	"strings"
)

func parseLevel(s string) slog.Level {
	s = strings.ToUpper(strings.TrimSpace(s))
	switch s {
	case "TRACE":
		return slog.LevelDebug
	case "DEBUG":
		return slog.LevelDebug
	case "INFO":
		return slog.LevelInfo
	case "WARN", "WARNING":
		return slog.LevelWarn
	case "ERROR":
		return slog.LevelError
	default:
		return slog.LevelInfo
	}
}

// Init initializes a global logger and returns it. Level is a string like "INFO" or "DEBUG".
func Init(level string) *slog.Logger {
	lvl := parseLevel(level)
	handler := slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{AddSource: false, Level: lvl})
	return slog.New(handler)
}