package audio

import (
	"errors"
	"os"
	"path/filepath"
	"strings"
)

// SupportedAudioFormats lists the audio formats that can be processed
type SupportedAudioFormats []string

var DefaultSupportedFormats = SupportedAudioFormats{
	".mp3",
	".wav",
	".flac",
	".m4a",
	".ogg",
	".opus",
}

// IsSupported checks if a file has a supported audio format
type AudioFile struct {
	Path   string
	Format string
	Size   int64
}

func NewAudioFile(path string) (*AudioFile, error) {
	fileInfo, err := os.Stat(path)
	if err != nil {
		return nil, err
	}

	ext := filepath.Ext(path)
	if !IsSupported(ext) {
		return nil, errors.New("unsupported audio format: " + ext)
	}

	return &AudioFile{
		Path:   path,
		Format: ext,
		Size:   fileInfo.Size(),
	}, nil
}

// IsSupported checks if the given extension is in supported formats
func IsSupported(ext string) bool {
	ext = strings.ToLower(ext)
	for _, format := range DefaultSupportedFormats {
		if ext == format {
			return true
		}
	}
	return false
}