package mic

import (
	"os"
	"path/filepath"
	"sort"
	"time"

	"tea.chunkbyte.com/kato/go-worm/lib/config"
)

type FileInfo struct {
	Name         string    `json:"name"`
	Size         int64     `json:"size"`
	ModifiedTime time.Time `json:"modified_time"`
}

func Dir() (string, error) {
	return config.MicDir()
}

func ListRecordings() ([]FileInfo, error) {
	dir, err := Dir()
	if err != nil {
		return nil, err
	}
	entries, err := os.ReadDir(dir)
	if err != nil {
		if os.IsNotExist(err) {
			return nil, nil
		}
		return nil, err
	}
	var files []FileInfo
	for _, entry := range entries {
		if entry.IsDir() || !ValidRecordingFilename(entry.Name()) {
			continue
		}
		info, err := entry.Info()
		if err != nil {
			continue
		}
		files = append(files, FileInfo{
			Name:         entry.Name(),
			Size:         info.Size(),
			ModifiedTime: info.ModTime(),
		})
	}
	sort.Slice(files, func(i, j int) bool {
		return files[i].ModifiedTime.After(files[j].ModifiedTime)
	})
	return files, nil
}

func OpenRecording(name string) (*os.File, os.FileInfo, error) {
	if !ValidRecordingFilename(name) {
		return nil, nil, os.ErrInvalid
	}
	dir, err := Dir()
	if err != nil {
		return nil, nil, err
	}
	path := filepath.Join(dir, filepath.Base(name))
	info, err := os.Stat(path)
	if err != nil {
		return nil, nil, err
	}
	if info.IsDir() {
		return nil, nil, os.ErrInvalid
	}
	file, err := os.Open(path)
	if err != nil {
		return nil, nil, err
	}
	return file, info, nil
}