package photo

import (
	"net/http"

	"git.kirsle.net/apps/gosocial/pkg/config"
	"git.kirsle.net/apps/gosocial/pkg/models"
	"git.kirsle.net/apps/gosocial/pkg/session"
	"git.kirsle.net/apps/gosocial/pkg/templates"
)

// SiteGallery controller (/photo/gallery) to view all members' public gallery pics.
func SiteGallery() http.HandlerFunc {
	tmpl := templates.Must("photo/gallery.html")
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		// Query params.
		var (
			viewStyle = r.FormValue("view") // cards (default), full
		)
		if viewStyle != "full" {
			viewStyle = "cards"
		}

		// Load the current user.
		currentUser, err := session.CurrentUser(r)
		if err != nil {
			session.FlashError(w, r, "Unexpected error: couldn't get CurrentUser")
		}

		// Get the page of photos.
		pager := &models.Pagination{
			Page:    1,
			PerPage: config.PageSizeSiteGallery,
			Sort:    "created_at desc",
		}
		pager.ParsePage(r)
		photos, err := models.PaginateGalleryPhotos(currentUser.ID, currentUser.IsAdmin, currentUser.Explicit, pager)

		// Bulk load the users associated with these photos.
		var userIDs = []uint64{}
		for _, photo := range photos {
			userIDs = append(userIDs, photo.UserID)
		}
		userMap, err := models.MapUsers(userIDs)
		if err != nil {
			session.FlashError(w, r, "Failed to MapUsers: %s", err)
		}

		// Get Likes information about these photos.
		var photoIDs = []uint64{}
		for _, p := range photos {
			photoIDs = append(photoIDs, p.ID)
		}
		likeMap := models.MapLikes(currentUser, "photos", photoIDs)

		var vars = map[string]interface{}{
			"IsSiteGallery": true,
			"Photos":        photos,
			"UserMap":       userMap,
			"LikeMap":       likeMap,
			"Pager":         pager,
			"ViewStyle":     viewStyle,
		}

		if err := tmpl.Execute(w, r, vars); err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
	})
}