/*
 * Copyright 2016 (c) Anna Schumaker.
 */
#include <core/playlist.h>
#include <core/string.h>
#include <gui/builder.h>
#include <gui/model.h>
#include <gui/queue.h>
#include <gui/view.h>

static struct gui_queue *gq_queue = NULL;

enum gq_filter_how {
	GQ_FILTER_DEFAULT,
	GQ_FILTER_ALBUM,
	GQ_FILTER_ARTIST,
	GQ_FILTER_GENRE,
	GQ_FILTER_TITLE,
};


static void __queue_toggle_flag(bool active, GtkWidget *widget,
				enum queue_flags flag)
{
	if (gq_queue == NULL)
		return;

	/*
	 * Some GTK themes have trouble with toggle buttons,
	 * so let's help users by changing image sensitivity.
	 */
	if (active)
		queue_set_flag(gq_queue->gq_queue, flag);
	else
		queue_unset_flag(gq_queue->gq_queue, flag);

	gtk_widget_set_sensitive(widget, active);
}

void __queue_random(GtkToggleButton *button, gpointer data)
{
	__queue_toggle_flag(gtk_toggle_button_get_active(button),
			    gtk_button_get_image(GTK_BUTTON(button)),
			    Q_RANDOM);
	if (gq_queue && gq_queue->gq_playlist) {
		playlist_set_random(gq_queue->gq_playlist->pl_type,
				    gq_queue->gq_playlist->pl_name,
				    gtk_toggle_button_get_active(button));
	}
}

void __queue_repeat(GtkToggleButton *button, gpointer data)
{
	__queue_toggle_flag(gtk_toggle_button_get_active(button),
			    gtk_button_get_image(GTK_BUTTON(button)),
			    Q_REPEAT);
}

void __queue_disabled(GtkSwitch *enabled, GParamSpec *pspec, gpointer data)
{
	__queue_toggle_flag(gtk_switch_get_active(enabled),
			    gui_builder_widget("o_treeview"),
			    Q_ENABLED);
}

static gboolean __queue_visible_func(GtkTreeModel *model, GtkTreeIter *iter,
				     gpointer data)
{
	struct track *track;
	unsigned int i;
	gchar *token;
	bool match;

	if (!gq_queue || !gq_queue->gq_search)
		return TRUE;

	track = gui_queue_model_iter_get_track(iter);

	for (i = 0; gq_queue->gq_search[i]; i++) {
		token = gq_queue->gq_search[i];

		switch (gq_queue->gq_active) {
		case GQ_FILTER_ALBUM:
			match = album_match_token(track->tr_album, token);
			break;
		case GQ_FILTER_ARTIST:
			match = artist_match_token(track->tr_artist, token);
			break;
		case GQ_FILTER_GENRE:
			match = genre_match_token(track->tr_genre, token);
			break;
		case GQ_FILTER_TITLE:
			match = track_match_token(track, token);
			break;
		default: /* GQ_FILTER_DEFAULT */
			match = track_match_token(track, token) ||
				album_match_token(track->tr_album,   token) ||
				artist_match_token(track->tr_artist, token) ||
				genre_match_token(track->tr_genre,   token);
		}

		if (!match)
			return false;
	}

	return TRUE;
}

void __queue_filter(GtkSearchEntry *entry, gpointer data)
{
	const gchar *text  = gtk_entry_get_text(GTK_ENTRY(entry));
	GtkComboBox *combo = GTK_COMBO_BOX(gui_builder_widget("filter_how"));

	if (!gq_queue)
		return;
	if (gq_queue->gq_search) {
		g_strfreev(gq_queue->gq_search);
		gq_queue->gq_search = NULL;
	}
	if (strlen(text) > 0) {
		gq_queue->gq_search = g_str_tokenize_and_fold(text, NULL, NULL);
		gq_queue->gq_active = gtk_combo_box_get_active(combo);
	}

	gtk_tree_model_filter_refilter(gui_view_get_filter());
	gui_view_scroll();
}

void __queue_filter_how_changed(int n)
{
	__queue_filter(GTK_SEARCH_ENTRY(gui_builder_widget("o_search")), NULL);
}

void gui_queue_init(void)
{
	gtk_tree_model_filter_set_visible_func(gui_view_get_filter(),
						__queue_visible_func,
						gui_builder_object("o_search"),
						NULL);
}

struct gui_queue *gui_queue_alloc(struct playlist *playlist, struct queue *queue,
				  const gchar *text, unsigned int flags)
{
	struct gui_queue *gq = g_malloc(sizeof(struct gui_queue));

	gq->gq_flags  = flags;
	gq->gq_text   = g_strdup(text);
	gq->gq_search = NULL;
	gq->gq_playlist = playlist;
	gq->gq_queue    = queue;

	return gq;
}

void gui_queue_free(struct queue *queue)
{
	struct gui_queue *gq  = gui_queue(queue);

	queue->q_private = NULL;

	if (gq_queue == gq)
		gui_view_set_queue(NULL);
	if (gq->gq_search)
		g_strfreev(gq->gq_search);
	g_free(gq->gq_text);
	g_free(gq);
}

void gui_queue_show(struct gui_queue *queue)
{
	GtkTreeView *view  = GTK_TREE_VIEW(gui_builder_widget("o_treeview"));
	GtkButton *random  = GTK_BUTTON(gui_builder_widget("o_random"));
	GtkButton *repeat  = GTK_BUTTON(gui_builder_widget("o_repeat"));
	GtkSwitch *enabled = GTK_SWITCH(gui_builder_widget("o_enable"));
	GtkEntry  *search  = GTK_ENTRY(gui_builder_widget("o_search"));
	bool has_random = false, has_repeat = false, is_enabled = false;;
	gchar *text;

	gq_queue = queue;

	gtk_widget_set_sensitive(GTK_WIDGET(random),  gui_queue_can_random(queue));
	gtk_widget_set_sensitive(GTK_WIDGET(repeat),  gui_queue_can_repeat(queue));
	gtk_widget_set_sensitive(GTK_WIDGET(enabled), gui_queue_can_disable(queue));

	if (queue) {
		has_random = queue_has_flag(queue->gq_queue, Q_RANDOM);
		has_repeat = queue_has_flag(queue->gq_queue, Q_REPEAT);
		is_enabled = queue_has_flag(queue->gq_queue, Q_ENABLED);
		gui_view_set_queue(queue->gq_queue);
	} else
		gui_view_set_queue(NULL);

	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(random),  has_random);
	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(repeat),  has_repeat);
	gtk_switch_set_active(GTK_SWITCH(enabled), is_enabled);

	/*
	 * Some GTK themes have trouble with toggle buttons,
	 * so let's help users know what the current state is.
	 */
	gtk_widget_set_sensitive(gtk_button_get_image(random), has_random);
	gtk_widget_set_sensitive(gtk_button_get_image(repeat), has_repeat);
	gtk_widget_set_sensitive(GTK_WIDGET(view), is_enabled);

	gtk_widget_set_sensitive(GTK_WIDGET(search), queue != NULL);

	if (queue && queue->gq_search) {
		text = g_strjoinv(" ", queue->gq_search);
		gtk_entry_set_text(search, text);
		g_free(text);
	} else
		gtk_entry_set_text(search, "");
}