package logging

import (
	"log/slog"
	"strings"
)

// Level represents a logging level.
type Level int

const (
	LevelDebug Level = iota
	LevelInfo
	LevelWarn
	LevelError
)

// String returns the string representation of the level.
func (l Level) String() string {
	switch l {
	case LevelDebug:
		return "debug"
	case LevelInfo:
		return "info"
	case LevelWarn:
		return "warn"
	case LevelError:
		return "error"
	default:
		return "info"
	}
}

// SlogLevel converts to slog.Level.
func (l Level) SlogLevel() slog.Level {
	switch l {
	case LevelDebug:
		return slog.LevelDebug
	case LevelInfo:
		return slog.LevelInfo
	case LevelWarn:
		return slog.LevelWarn
	case LevelError:
		return slog.LevelError
	default:
		return slog.LevelInfo
	}
}

// ParseLevel parses a string into a Level.
// Returns LevelInfo if the string is not recognized.
func ParseLevel(s string) Level {
	switch strings.ToLower(strings.TrimSpace(s)) {
	case "debug":
		return LevelDebug
	case "info":
		return LevelInfo
	case "warn", "warning":
		return LevelWarn
	case "error", "err":
		return LevelError
	default:
		return LevelInfo
	}
}