package main

import (
	"log"
	"os"
	"path/filepath"
	"strings"
	"sync"
	"time"

	"github.com/dhowden/tag"
)

type Episode struct {
	Title       string
	File        string
	Cover       string
	PubDate     string
	Description string
	Artist      string
	Size        int64
}

var (
	lastMod time.Time
	rssLock sync.Mutex
)

func scanEpisodes() ([]Episode, error) {
	var episodes []Episode

	err := filepath.Walk(audioDir, func(path string, info os.FileInfo, err error) error {
		if err != nil || info.IsDir() || !strings.HasSuffix(strings.ToLower(path), ".mp3") {
			return nil
		}

		file, err := os.Open(path)
		if err != nil {
			return err
		}
		defer file.Close()

		meta, err := tag.ReadFrom(file)
		if err != nil {
			log.Printf("File %s senza metadati ID3: %v", path, err)
			return nil
		}

		// relPath, _ := filepath.Rel(".", path)
		baseName := strings.TrimSuffix(filepath.Base(path), filepath.Ext(path))
		// coverPath := filepath.Join(coversDir, baseName+".jpg")

		ep := Episode{
			Title:       meta.Title(),
			Artist:      meta.Artist(),
			Description: meta.Comment(),
			File:        baseName + ".mp3",
			Cover:       baseName + ".jpg",
			PubDate:     info.ModTime().Format(time.RFC1123),
			Size:        info.Size(),
		}

		if ep.Description == "" {
			ep.Description = ep.Title
		}

		episodes = append(episodes, ep)
		return nil
	})

	return episodes, err
}