package media

import (
	"context"
	"errors"
	"fmt"
	"log"
)

type MediaSetService struct{}

func (s *MediaSetService) GetMediaSet(ctx context.Context, source string, id string) (*MediaSet, error) {
	log.Printf("GetMediaSet called with source %q, id %q", source, id)

	if source != "youtube" {
		return nil, errors.New("unknown source")
	}

	// try to load and return a cached MediaSet, if possible:
	mediaSet := NewMediaSet(id)
	if mediaSet.Exists() {
		if err := mediaSet.Load(); err != nil {
			return nil, fmt.Errorf("error loading MediaSet: %v", err)
		}
		return mediaSet, nil
	}

	return &MediaSet{ID: id}, nil
}