/*
 * Copyright 2016 (c) Anna Schumaker.
 */
#include <core/collection.h>
#include <gui/builder.h>
#include <gui/playlist.h>
#include <gui/sidebar.h>

enum playlist_sidebar_columns {
	P_SB_IMAGE,
	P_SB_NAME,
	P_SB_PLAYLIST,
};

static GtkTreeStore   *p_store;
static enum playlist_t p_cur;

static void __playlist_set(GtkTreeIter *iter,  const gchar *name,
			   const gchar *image, enum playlist_t plist)
{
	gtk_tree_store_set(p_store, iter, P_SB_NAME, name,
					  P_SB_IMAGE, image,
					  P_SB_PLAYLIST, plist, -1);
}

static void __playlist_add(GtkTreeIter *parent, const gchar *name,
			   const gchar *image,  enum playlist_t plist)
{
	GtkTreeIter iter;
	gtk_tree_store_insert(p_store, &iter, parent, -1);
	__playlist_set(&iter, name, image, plist);
}

void __playlist_selection_changed(GtkTreeSelection *selection, gpointer data)
{
	GtkStack *stack = GTK_STACK(gui_builder_widget("o_stack"));
	GtkTreeModel *model = GTK_TREE_MODEL(p_store);
	GtkTreeIter iter;

	if (gtk_tree_selection_get_selected(selection, &model, &iter)) {
		gtk_tree_model_get(model, &iter, P_SB_PLAYLIST, &p_cur, -1);

		gtk_stack_set_visible_child_name(stack, "queues");
		gui_sidebar_selected(SB_PLAYLIST,
				     gui_queue(playlist_get_queue(p_cur)));
		playlist_select(p_cur);
	}
}

static void *__playlist_init(struct queue *queue)
{
	return gui_queue_alloc(queue, "Playlist", 0);
}

static bool __playlist_erase(struct queue *queue, struct track *track)
{
	/* collection_unban() and playlist_remove() handle queue changes */
	if (gui_playlist_cur() == PL_HIDDEN)
		collection_unban(track);
	else
		playlist_remove(gui_playlist_cur(), track);
	return false;
}

void gui_playlist_init()
{
	GtkTreeView *treeview;
	GtkTreeIter parent;

	p_store = GTK_TREE_STORE(gui_builder_object("o_playlist_store"));

	/* Add "Playlist" header. */
	gtk_tree_store_insert(p_store, &parent, NULL, -1);
	gtk_tree_store_insert(p_store, &parent, NULL, -1);
	__playlist_set(&parent, "<span size='large'>Playlists</span>",
				"emblem-documents", 0);

	/* Add playlists. */
	__playlist_add(&parent, "Favorites",    "emblem-favorite", PL_FAVORITED);
	__playlist_add(&parent, "Hidden",       "window-close",PL_HIDDEN);
	__playlist_add(&parent, "Most Played",  "go-up",   PL_MOST_PLAYED);
	__playlist_add(&parent, "Least Played", "go-down", PL_LEAST_PLAYED);
	__playlist_add(&parent, "Unplayed",     "audio-x-generic", PL_UNPLAYED);

	treeview = GTK_TREE_VIEW(gui_builder_widget("o_playlist_view"));
	gtk_tree_view_expand_all(treeview);
	gtk_tree_selection_set_select_function(
					gtk_tree_view_get_selection(treeview),
					gui_sidebar_on_select, NULL, NULL);

	gtk_tree_store_insert(p_store, &parent, NULL, -1);
}

enum playlist_t gui_playlist_cur()
{
	return p_cur;
}

struct queue_ops playlist_ops = {
	.qop_init    = __playlist_init,
	.qop_deinit  = gui_queue_free,
	.qop_added   = gui_queue_added,
	.qop_erase   = __playlist_erase,
	.qop_removed = gui_queue_removed,
	.qop_cleared = gui_queue_cleared,
	.qop_updated = gui_queue_updated,
};