package observability

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

func NewLogger(level string) (*slog.Logger, error) {
	parsed, err := parseLevel(level)
	if err != nil {
		return nil, err
	}

	handler := slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{Level: parsed})
	return slog.New(handler), nil
}

func parseLevel(level string) (slog.Level, error) {
	switch strings.ToLower(strings.TrimSpace(level)) {
	case "debug":
		return slog.LevelDebug, nil
	case "info", "":
		return slog.LevelInfo, nil
	case "warn", "warning":
		return slog.LevelWarn, nil
	case "error":
		return slog.LevelError, nil
	default:
		return slog.LevelInfo, fmt.Errorf("unsupported LOG_LEVEL: %s", level)
	}
}