/* This file is part of Cinaest.
 *
 * Copyright (C) 2009 Philipp Zabel
 *
 * Cinaest is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Cinaest is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Cinaest. If not, see <http://www.gnu.org/licenses/>.
 */

using Gtk;
using Hildon;

public class SourceListView : PannableArea {
	TreeView tree;
	ListStore store;
	TreeModelFilter filtered_store;
	bool filtered;

	public signal void source_activated (MovieSource source);

	public SourceListView (List<MovieSource> list, bool _filtered, Gtk.Window window) {
		filtered = _filtered;

		// Source list
		store = new ListStore (3, typeof (string), typeof (string), typeof (MovieSource));
		add_sources (list);

		if (filtered) {
			// Add filter wrapper
			filtered_store = new TreeModelFilter (store, null);
			filtered_store.set_visible_func (filter_visible_func);

			// Tree View
			tree = (TreeView) Hildon.gtk_tree_view_new_with_model (UIMode.NORMAL, filtered_store);
		} else {
			tree = (TreeView) Hildon.gtk_tree_view_new_with_model (UIMode.NORMAL, store);
		}
		tree.set_headers_visible (false);

		add (tree);

		tree.set_rules_hint (true);

		// Tree selection object
		var selection = tree.get_selection ();
		selection.set_mode (SelectionMode.SINGLE);

		// Source column
		var title_column = new TreeViewColumn ();
		title_column.set_title (_("Source"));
		title_column.set_reorderable (false);
		title_column.set_sizing (TreeViewColumnSizing.AUTOSIZE);
		title_column.set_expand (true);

		// Add name
		var vbox_renderer = new CellRendererVBox ();

		var renderer = new CellRendererText ();
		renderer.yalign = 1.0f;
		vbox_renderer.append (renderer, true);
		vbox_renderer.set_data ("name", renderer);

		// Add description
		renderer = new CellRendererText ();
		renderer.yalign = 0;
		renderer.ellipsize = Pango.EllipsizeMode.END;

		Pango.AttrList attr_list = new Pango.AttrList ();
		var style = Gtk.rc_get_style_by_paths (Gtk.Settings.get_default (), "SmallSystemFont", null, typeof (void));
		if (style != null) {
			var attr_font_desc = new Pango.AttrFontDesc (style.font_desc.copy ());
			attr_list.insert ((owned) attr_font_desc);
		}
		Gdk.Color color;
		window.ensure_style ();
		if (window.style.lookup_color ("SecondaryTextColor", out color)) {
			Pango.Attribute attr_color = Pango.attr_foreground_new (color.red, color.green, color.blue);
			attr_list.insert ((owned) attr_color);
		}
		renderer.attributes = attr_list;

		vbox_renderer.append (renderer, true);
		vbox_renderer.set_data ("description", renderer);

		title_column.pack_start (vbox_renderer, true);
		title_column.set_cell_data_func (vbox_renderer, vbox_data_func);

		tree.append_column (title_column);

		// Connect signals
		tree.row_activated.connect (on_row_activated);
	}

	bool filter_visible_func (TreeModel model, TreeIter iter) {
		MovieSource source = null;

		store.get (iter, 2, out source);
		
		return source.active;
	}

	public void add_sources (List<MovieSource> list) {
		foreach (MovieSource source in list) {
			TreeIter iter;

			store.insert_with_values (out iter, -1, 0, source.get_name (), 1, source.get_description (), 2, source);

			source.notify["active"].connect (this.on_source_changed);
		}
	}

	private void on_source_changed (GLib.Object _source, GLib.ParamSpec spec) {
		var source = (MovieSource) _source;
		TreeIter iter;

		if (get_iter (source, out iter)) {
			TreePath path = store.get_path (iter);
			store.row_changed (path, iter);
		}
	}

	public bool get_iter (MovieSource source, out Gtk.TreeIter iter) {
		if (store.get_iter_first (out iter)) do {
			MovieSource s = null;
			store.get (iter, 2, out s);
			if (s == source) {
				return true;
			}
		} while (store.iter_next (ref iter));

		return false;
	}

	public unowned TreeSelection get_selection () {
		return tree.get_selection ();
	}

	public void set_hildon_ui_mode (UIMode mode) {
		var selection = tree.get_selection ();

		if (mode == UIMode.NORMAL) {
			selection.set_mode (SelectionMode.NONE);
		}
		Hildon.gtk_tree_view_set_ui_mode (tree, mode);
		if (mode == UIMode.EDIT) {
			selection.set_mode (SelectionMode.MULTIPLE);
		}
	}

	public int length () {
		TreeIter iter;
		int len = 0;

		if (store.get_iter_first (out iter)) do {
			len++;
		} while (store.iter_next (ref iter));

		return len;
	}

	private void on_row_activated (TreeView tree, TreePath path_, TreeViewColumn column) {
		TreePath path = path_.copy (); // FIXME - calling model.get_iter with path_ directly causes a C qualifier warning
		TreeModel model = tree.model;
		TreeIter iter;

		if (model.get_iter (out iter, path)) {
			MovieSource source;
			model.get (iter, 2, out source);
			source_activated (source);
		}
	}

	private void vbox_data_func (CellLayout cell_layout, CellRenderer cell, TreeModel model, TreeIter iter) {
		CellRendererText renderer;
		string name;
		string description;

		model.get (iter, 0, out name, 1, out description);

		renderer = cell.get_data ("name");
		renderer.text = name;

		renderer = cell.get_data ("description");
		renderer.text = description;
	}
}