/*
 * Copyright 2016 (c) Anna Schumaker.
 */
#include <core/audio.h>
#include <core/idle.h>
#include <core/playlist.h>
#include <core/string.h>
#include <gui/playlists/system.h>
#include <gui/sidebar.h>

static struct playlist *favorites;
static struct playlist *hidden;

static bool __gui_pl_system_is_playlist(struct playlist *playlist)
{
	return string_match(playlist->pl_name, "Favorites") ||
	       string_match(playlist->pl_name, "Hidden");
}

static bool __gui_pl_system_is_dynamic(struct playlist *playlist)
{
	return string_match(playlist->pl_name, "Most Played")  ||
	       string_match(playlist->pl_name, "Least Played") ||
	       string_match(playlist->pl_name, "Unplayed");
}

static bool __gui_pl_system_find_descend_header(GtkTreeIter *iter,
						const gchar *name)
{
	GtkTreeIter header;

	if (!gui_sidebar_iter_first(&header))
		return false;
	if (!gui_sidebar_iter_find(&header, name, PL_MAX_TYPE))
		return false;
	return gui_sidebar_iter_down(&header, iter);
}

void __gui_pl_system_favorite_toggled(GtkToggleButton *toggle, gpointer data)
{
	if (gtk_toggle_button_get_active(toggle))
		playlist_add(favorites, audio_cur_track());
	else
		playlist_remove(favorites, audio_cur_track());
}

void __gui_pl_system_hide_toggled(GtkToggleButton *toggle, gpointer data)
{
	if (gtk_toggle_button_get_active(toggle)) {
		if (playlist_add(hidden, audio_cur_track()))
			audio_next();
	} else
		playlist_remove(hidden, audio_cur_track());
}

static bool __gui_pl_system_init_idle()
{
	GtkTreeIter iter;

	/* Add toplevel playlists. */
	gui_sidebar_iter_first(&iter);
	gui_sidebar_iter_add(&iter, playlist_lookup(PL_SYSTEM, "Queued Tracks"),
				    "audio-x-generic");
	gui_sidebar_iter_add(&iter, playlist_lookup(PL_SYSTEM, "Collection"),
				    "media-optical");
	gui_sidebar_iter_add(&iter, playlist_lookup(PL_SYSTEM, "History"),
				    "document-open-recent");

	/* Add user-modifiable playlists. */
	gui_sidebar_iter_find(&iter, "Playlists", PL_MAX_TYPE);
	gui_sidebar_iter_append_child(&iter, playlist_lookup(PL_SYSTEM, "Favorites"),
					     "emblem-favorite");
	gui_sidebar_iter_append_child(&iter, playlist_lookup(PL_SYSTEM, "Hidden"),
					     "window-close");

	/* Add dynamic playlists. */
	gui_sidebar_iter_find(&iter, "Dynamic", PL_MAX_TYPE);
	gui_sidebar_iter_append_child(&iter, playlist_lookup(PL_SYSTEM, "Most Played"),
					     "go-up");
	gui_sidebar_iter_append_child(&iter, playlist_lookup(PL_SYSTEM, "Least Played"),
					     "go-down");
	gui_sidebar_iter_append_child(&iter, playlist_lookup(PL_SYSTEM, "Unplayed"),
					     "audio-x-generic");

	return true;
}

void gui_pl_system_init()
{
	favorites = playlist_lookup(PL_SYSTEM, "Favorites");
	hidden    = playlist_lookup(PL_SYSTEM, "Hidden");
	idle_schedule(IDLE_SYNC, __gui_pl_system_init_idle, NULL);
}

void gui_pl_system_update(struct playlist *playlist)
{
	GtkTreeIter iter;

	if (__gui_pl_system_is_playlist(playlist)) {
		if (!__gui_pl_system_find_descend_header(&iter, "Playlists"))
			return;
	} else if (__gui_pl_system_is_dynamic(playlist)) {
		if (!__gui_pl_system_find_descend_header(&iter, "Dynamic"))
			return;
	} else {
		if (!gui_sidebar_iter_first(&iter))
			return;
	}

	if (gui_sidebar_iter_find(&iter, playlist->pl_name, playlist->pl_type))
		gui_sidebar_iter_update(&iter);
}

void gui_pl_system_select(struct playlist *playlist)
{
	GtkTreeIter iter;

	if (__gui_pl_system_is_playlist(playlist)) {
		if (!__gui_pl_system_find_descend_header(&iter, "Playlists"))
			return;
	} else if (__gui_pl_system_is_dynamic(playlist)) {
		if (!__gui_pl_system_find_descend_header(&iter, "Dynamic"))
			return;
	} else {
		if (!gui_sidebar_iter_first(&iter))
			return;
	}

	if (gui_sidebar_iter_find(&iter, playlist->pl_name, playlist->pl_type))
		gui_sidebar_iter_select(&iter);
}

void gui_pl_system_track_loaded(struct track *track)
{
	gtk_toggle_button_set_active(gui_favorite_button(),
				     playlist_has(favorites, track));
	gtk_toggle_button_set_active(gui_hide_button(),
				     playlist_has(hidden, track));
}