package api

import (
	"net/http"
	"path/filepath"

	"github.com/photoprism/photoprism/pkg/sanitize"

	"github.com/gin-gonic/gin"
	"github.com/photoprism/photoprism/internal/acl"
	"github.com/photoprism/photoprism/internal/event"
	"github.com/photoprism/photoprism/internal/i18n"
	"github.com/photoprism/photoprism/internal/photoprism"
	"github.com/photoprism/photoprism/internal/query"
	"github.com/photoprism/photoprism/internal/service"
)

// DELETE /api/v1/photos/:uid/files/:file_uid
//
// Parameters:
//   uid: string Photo UID as returned by the API
//   file_uid: string File UID as returned by the API
func DeleteFile(router *gin.RouterGroup) {
	router.DELETE("/photos/:uid/files/:file_uid", func(c *gin.Context) {
		s := Auth(SessionID(c), acl.ResourceFiles, acl.ActionDelete)

		if s.Invalid() {
			AbortUnauthorized(c)
			return
		}

		conf := service.Config()

		if conf.ReadOnly() || !conf.Settings().Features.Edit {
			Abort(c, http.StatusForbidden, i18n.ErrReadOnly)
			return
		}

		photoUID := sanitize.IdString(c.Param("uid"))
		fileUID := sanitize.IdString(c.Param("file_uid"))

		file, err := query.FileByUID(fileUID)

		if err != nil {
			log.Errorf("photo: %s (delete file)", err)
			AbortEntityNotFound(c)
			return
		}

		if file.FilePrimary {
			log.Errorf("photo: cannot delete primary file")
			AbortDeleteFailed(c)
			return
		}

		fileName := photoprism.FileName(file.FileRoot, file.FileName)
		baseName := filepath.Base(fileName)

		mediaFile, err := photoprism.NewMediaFile(fileName)

		if err != nil {
			log.Errorf("photo: %s (delete %s)", err, sanitize.Log(baseName))
			AbortEntityNotFound(c)
			return
		}

		if err := mediaFile.Remove(); err != nil {
			log.Errorf("photo: %s (delete %s from folder)", err, sanitize.Log(baseName))
		}

		if err := file.Delete(true); err != nil {
			log.Errorf("photo: %s (delete %s from index)", err, sanitize.Log(baseName))
			AbortDeleteFailed(c)
			return
		}

		// Notify clients by publishing events.
		PublishPhotoEvent(EntityUpdated, photoUID, c)

		event.SuccessMsg(i18n.MsgFileDeleted)

		if p, err := query.PhotoPreloadByUID(photoUID); err != nil {
			AbortEntityNotFound(c)
			return
		} else {
			c.JSON(http.StatusOK, p)
		}
	})
}