package download

import (
	"context"
	"errors"
	"fmt"

	"github.com/kr/pretty"

	"github.com/tanaikech/go-getfilelist"

	"git.selly.red/Selly-Modules/logger"
	"google.golang.org/api/drive/v3"
	"google.golang.org/api/option"
)

type GoogleDrive struct {
	APIKey string

	svc *drive.Service
}

type GoogleDriveFile struct {
	ID   string
	Name string
}

func (g GoogleDrive) Init() (err error) {
	if g.APIKey == "" {
		err = errors.New("missing google api key")
		logger.Error("validation", logger.LogData{
			Source:  "download.google_drive.Init",
			Message: err.Error(),
			Data:    nil,
		})
		return
	}

	// init google drive
	svc, err := drive.NewService(context.Background(), option.WithAPIKey(g.APIKey))
	if err != nil {
		err = fmt.Errorf("unable to retrieve Drive: %v", err)
		logger.Error("init google drive service", logger.LogData{
			Source:  "download.google_drive.Init",
			Message: err.Error(),
			Data:    nil,
		})
		return
	}

	// assign
	g.svc = svc

	return
}

func (g GoogleDrive) GetFilesByFolderID(folderID string) ([]GoogleDriveFile, error) {
	var (
		result = make([]GoogleDriveFile, 0)
	)

	res, err := getfilelist.Folder(folderID).Fields("files(name,id)").Do(g.svc)
	if err != nil {
		err := fmt.Errorf("error when fetch folder %s: %s", folderID, err.Error())
		logger.Error("", logger.LogData{
			Source:  "download.google_drive.GetFilesByFolderID",
			Message: err.Error(),
			Data:    logger.Map{"folder": folderID},
		})
		return result, err
	}

	// if there is no files
	//if len(res.FileList) == 0 {
	//	return result, nil
	//}

	pretty.Println("res", res)

	return result, nil
}