package web

import (
	"net/http"

	"git.noroutes.net/NoRoutes/vibetunes/internal/auth"
	"git.noroutes.net/NoRoutes/vibetunes/internal/database"
)

func (h *Web) handlePlaylists(w http.ResponseWriter, r *http.Request) {
	user := auth.UserFromContext(r.Context())
	playlists, err := database.ListPlaylistsVisibleToUser(h.DB, user.ID)
	if err != nil {
		http.Error(w, "internal error", http.StatusInternalServerError)
		return
	}
	h.page(w, r, "playlists", "playlists", "Playlists", playlists)
}

func (h *Web) handlePlaylistCreate(w http.ResponseWriter, r *http.Request) {
	user := auth.UserFromContext(r.Context())
	if err := r.ParseForm(); err != nil {
		http.Error(w, "bad request", http.StatusBadRequest)
		return
	}
	name := r.FormValue("name")
	if name == "" {
		http.Redirect(w, r, "/playlists", http.StatusFound)
		return
	}
	if _, err := database.CreatePlaylist(h.DB, user.ID, name, "", false); err != nil {
		http.Error(w, "internal error", http.StatusInternalServerError)
		return
	}
	http.Redirect(w, r, "/playlists", http.StatusFound)
}

func (h *Web) handlePlaylist(w http.ResponseWriter, r *http.Request) {
	user := auth.UserFromContext(r.Context())
	id := r.PathValue("id")
	playlist, err := database.GetPlaylist(h.DB, id)
	if err != nil {
		http.NotFound(w, r)
		return
	}
	if playlist.OwnerID != user.ID && !playlist.IsPublic {
		http.Error(w, "403 Forbidden", http.StatusForbidden)
		return
	}
	entries, err := database.ListPlaylistEntries(h.DB, id)
	if err != nil {
		http.Error(w, "internal error", http.StatusInternalServerError)
		return
	}
	var rows []SongRow
	for _, e := range entries {
		song, err := database.GetSong(h.DB, e.SongID)
		if err != nil {
			continue
		}
		rows = append(rows, toSongRow(h.DB, song, albumOf(h.DB, song), user.ID))
	}
	h.page(w, r, "playlist", "playlists", playlist.Name, struct {
		Playlist *database.Playlist
		Songs    []SongRow
		Owned    bool
	}{playlist, rows, playlist.OwnerID == user.ID})
}

func (h *Web) handlePlaylistDelete(w http.ResponseWriter, r *http.Request) {
	user := auth.UserFromContext(r.Context())
	id := r.PathValue("id")
	playlist, err := database.GetPlaylist(h.DB, id)
	if err != nil {
		http.NotFound(w, r)
		return
	}
	if playlist.OwnerID != user.ID {
		http.Error(w, "403 Forbidden", http.StatusForbidden)
		return
	}
	if err := database.DeletePlaylist(h.DB, id); err != nil {
		http.Error(w, "internal error", http.StatusInternalServerError)
		return
	}
	http.Redirect(w, r, "/playlists", http.StatusFound)
}

func (h *Web) handleFavorites(w http.ResponseWriter, r *http.Request) {
	user := auth.UserFromContext(r.Context())

	artistIDs, _ := database.ListStarredIDs(h.DB, user.ID, "artist")
	var artists []ArtistView
	for _, id := range artistIDs {
		if a, err := database.GetArtist(h.DB, id); err == nil {
			artists = append(artists, toArtistView(a))
		}
	}

	albumIDs, _ := database.ListStarredIDs(h.DB, user.ID, "album")
	var albums []AlbumView
	for _, id := range albumIDs {
		if a, err := database.GetAlbum(h.DB, id); err == nil {
			albums = append(albums, toAlbumView(h.DB, a))
		}
	}

	songIDs, _ := database.ListStarredIDs(h.DB, user.ID, "song")
	var songs []SongRow
	for _, id := range songIDs {
		if s, err := database.GetSong(h.DB, id); err == nil {
			songs = append(songs, toSongRow(h.DB, s, albumOf(h.DB, s), user.ID))
		}
	}

	h.page(w, r, "favorites", "favorites", "Favorites", struct {
		Artists []ArtistView
		Albums  []AlbumView
		Songs   []SongRow
	}{artists, albums, songs})
}

func (h *Web) handleFavoriteStar(w http.ResponseWriter, r *http.Request) { h.setFavorite(w, r, true) }
func (h *Web) handleFavoriteUnstar(w http.ResponseWriter, r *http.Request) {
	h.setFavorite(w, r, false)
}

func (h *Web) setFavorite(w http.ResponseWriter, r *http.Request, star bool) {
	user := auth.UserFromContext(r.Context())
	if err := r.ParseForm(); err != nil {
		http.Error(w, "bad request", http.StatusBadRequest)
		return
	}
	itemType := r.FormValue("item_type")
	itemID := r.FormValue("item_id")
	next := safeRedirectPath(r.FormValue("next"))
	switch itemType {
	case "song", "album", "artist":
	default:
		http.Error(w, "bad request", http.StatusBadRequest)
		return
	}
	var err error
	if star {
		err = database.Star(h.DB, user.ID, itemType, itemID)
	} else {
		err = database.Unstar(h.DB, user.ID, itemType, itemID)
	}
	if err != nil {
		http.Error(w, "internal error", http.StatusInternalServerError)
		return
	}
	http.Redirect(w, r, next, http.StatusFound)
}

func (h *Web) handleRecent(w http.ResponseWriter, r *http.Request) {
	user := auth.UserFromContext(r.Context())
	history, err := database.ListRecentlyPlayed(h.DB, user.ID, 100)
	if err != nil {
		http.Error(w, "internal error", http.StatusInternalServerError)
		return
	}
	var rows []SongRow
	seen := map[string]bool{}
	for _, entry := range history {
		if seen[entry.SongID] {
			continue
		}
		seen[entry.SongID] = true
		song, err := database.GetSong(h.DB, entry.SongID)
		if err != nil {
			continue
		}
		rows = append(rows, toSongRow(h.DB, song, albumOf(h.DB, song), user.ID))
	}
	h.page(w, r, "recent", "recent", "Recently Played", rows)
}