/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * This program 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *		Michael Zucchi <notzed@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

/* A plugin manager ui */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <gtk/gtk.h>
#include <glib/gi18n-lib.h>
#include <string.h>
#include <stdio.h>

#include "e-util/e-plugin.h"
#include "shell/e-shell-window.h"
#include "shell/e-shell-window-actions.h"

#define d(S) (S)

enum {
	LABEL_NAME,
	LABEL_AUTHOR,
	LABEL_DESCRIPTION,
	LABEL_LAST
};

enum
{
	COL_PLUGIN_ENABLED = 0,
	COL_PLUGIN_NAME,
	COL_PLUGIN_DATA,
	COL_PLUGIN_CFG_WIDGET
};

static struct {
	const gchar *label;
} label_info[LABEL_LAST] = {
	{ N_("Name"), },
	{ N_("Author(s)"), },
	{ N_("Description"), },
};

typedef struct _Manager Manager;
struct _Manager {
	GtkTreeView *treeview;
	GtkTreeModel *model;

	GtkLabel *labels[LABEL_LAST];
	GtkLabel *items[LABEL_LAST];

	GtkWidget *config_plugin_label;
	GtkWidget *active_cfg_widget;

	GSList *plugins;
};

/* for tracking if we're shown */
static GtkWidget *notebook;
static GtkWidget *configure_page;
static gint last_selected_page;
static gulong switch_page_handler_id;

gboolean	e_plugin_ui_init		(GtkUIManager *ui_manager,
						 EShellWindow *shell_window);

static void
eppm_set_label (GtkLabel *l, const gchar *v)
{
	gtk_label_set_label(l, v?v:_("Unknown"));
}

static void
eppm_switch_page_cb (GtkNotebook *notebook,
                     GtkNotebookPage *page,
                     guint page_num)
{
	last_selected_page = page_num;
}

static void
eppm_show_plugin (Manager *m, EPlugin *ep, GtkWidget *cfg_widget)
{
	if (ep) {
		gchar *string;

		string = g_strdup_printf ("<span size=\"x-large\">%s</span>", ep->name);
		gtk_label_set_markup (GTK_LABEL (m->items[LABEL_NAME]), string);
		gtk_label_set_markup (GTK_LABEL (m->config_plugin_label), string);
		g_free (string);

		if (ep->authors) {
			GSList *l = ep->authors;
			GString *out = g_string_new ("");

			for (; l; l = g_slist_next (l)) {
				EPluginAuthor *epa = l->data;

				if (l != ep->authors)
					g_string_append (out, ",\n");
				if (epa->name)
					g_string_append (out, epa->name);
				if (epa->email) {
					g_string_append (out, " <");
					g_string_append (out, epa->email);
					g_string_append (out, ">");
				}
			}
			gtk_label_set_label (m->items[LABEL_AUTHOR], out->str);
			g_string_free (out, TRUE);
		} else {
			eppm_set_label (m->items[LABEL_AUTHOR], NULL);
		}

		eppm_set_label (m->items[LABEL_DESCRIPTION], ep->description);
	} else {
		gint i;

		gtk_label_set_markup (GTK_LABEL (m->config_plugin_label), "");
		for (i = 0; i < LABEL_LAST; i++)
			gtk_label_set_label (m->items[i], "");
	}

	if (cfg_widget != NULL)
		gtk_notebook_append_page_menu (
			GTK_NOTEBOOK (notebook), configure_page,
			gtk_label_new (_("Configuration")), NULL);

	if (m->active_cfg_widget != cfg_widget) {
		if (m->active_cfg_widget)
			gtk_widget_hide (m->active_cfg_widget);

		if (cfg_widget)
			gtk_widget_show (cfg_widget);

		m->active_cfg_widget = cfg_widget;
	}
}

static void
eppm_selection_changed (GtkTreeSelection *selection, Manager *m)
{
	GtkTreeModel *model;
	GtkTreeIter iter;

	g_signal_handler_block (notebook, switch_page_handler_id);
	gtk_notebook_remove_page (GTK_NOTEBOOK (notebook), 1);
	g_signal_handler_unblock (notebook, switch_page_handler_id);

	if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
		EPlugin *ep;
		GtkWidget *cfg_widget = NULL;

		gtk_tree_model_get (model, &iter, COL_PLUGIN_DATA, &ep, COL_PLUGIN_CFG_WIDGET, &cfg_widget, -1);
		eppm_show_plugin (m, ep, cfg_widget);

	} else {
		eppm_show_plugin (m, NULL, NULL);
	}

	g_signal_handler_block (notebook, switch_page_handler_id);
	gtk_notebook_set_current_page (
		GTK_NOTEBOOK (notebook), last_selected_page);
	g_signal_handler_unblock (notebook, switch_page_handler_id);
}

static void
eppm_enable_toggled (GtkCellRendererToggle *renderer, const gchar *path_string, Manager *m)
{
	GtkTreePath *path;
	GtkTreeIter iter;
	EPlugin *plugin;

	path = gtk_tree_path_new_from_string (path_string);

	if (gtk_tree_model_get_iter (m->model, &iter, path)) {
		gtk_tree_model_get (m->model, &iter, COL_PLUGIN_DATA, &plugin, -1);
		e_plugin_enable (plugin, !plugin->enabled);

		g_warning ("%s", plugin->name);

		gtk_list_store_set (GTK_LIST_STORE(m->model), &iter,
				    COL_PLUGIN_ENABLED, plugin->enabled,
				    -1);
	}

	gtk_tree_path_free (path);
}

static void
eppm_free (gpointer data)
{
	Manager *m = data;
	GSList *l;

	for (l = m->plugins; l; l = g_slist_next (l))
		g_object_unref (l->data);

	g_slist_free (m->plugins);
	g_object_unref (m->model);
	g_free (m);
}

static void
action_plugin_manager_cb (GtkAction *action,
                          EShellWindow *shell_window)
{
	Manager *m;
	gint i;
	GtkWidget *dialog;
	GtkWidget *hbox, *w;
	GtkWidget *overview_page;
	GtkWidget *content_area;
	GtkListStore *store;
	GtkTreeSelection *selection;
	GtkCellRenderer *renderer;
	GSList *l;
	gchar *string;
	GtkWidget *subvbox;

	m = g_malloc0 (sizeof (*m));

	/* Setup the ui */
	dialog = gtk_dialog_new_with_buttons (
		_("Plugin Manager"),
		GTK_WINDOW (shell_window),
		GTK_DIALOG_DESTROY_WITH_PARENT,
		GTK_STOCK_CLOSE, GTK_RESPONSE_CLOSE, NULL);

	content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog));

	gtk_window_set_default_size (GTK_WINDOW (dialog), 640, 400);
	g_object_set (dialog, "has_separator", FALSE, NULL);

	hbox = gtk_hbox_new (FALSE, 0);
	gtk_container_set_border_width (GTK_CONTAINER (hbox), 12);
	gtk_box_pack_start (GTK_BOX (content_area), hbox, TRUE, TRUE, 0);

	string = g_strdup_printf ("<i>%s</i>", _("Note: Some changes will not take effect until restart"));

	w = g_object_new (gtk_label_get_type (),
			  "label", string,
			  "wrap", FALSE,
			  "use_markup", TRUE,
			  NULL);
	gtk_widget_show (w);
	g_free (string);

	gtk_box_pack_start (GTK_BOX (content_area), w, FALSE, TRUE, 6);

	notebook = gtk_notebook_new ();
	gtk_notebook_set_show_tabs (GTK_NOTEBOOK (notebook), TRUE);
	gtk_notebook_set_show_border (GTK_NOTEBOOK (notebook), FALSE);
	gtk_notebook_set_scrollable (GTK_NOTEBOOK (notebook), TRUE);

	switch_page_handler_id = g_signal_connect (
		notebook, "switch-page",
		G_CALLBACK (eppm_switch_page_cb), NULL);

	overview_page = gtk_vbox_new (FALSE, 0);
	configure_page = gtk_vbox_new (FALSE, 0);
	g_object_ref_sink (configure_page);
	gtk_container_set_border_width (GTK_CONTAINER (overview_page), 10);
	gtk_container_set_border_width (GTK_CONTAINER (configure_page), 10);
	gtk_notebook_append_page_menu (GTK_NOTEBOOK (notebook), overview_page, gtk_label_new (_("Overview")), NULL);

	gtk_widget_show (notebook);
	gtk_widget_show (overview_page);
	gtk_widget_show (configure_page);

	/* name of plugin on "Configuration" tab */
	m->config_plugin_label = g_object_new (
		gtk_label_get_type (),
		"wrap", TRUE,
		"selectable", FALSE,
		"xalign", 0.0,
		"yalign", 0.0, NULL);
	gtk_widget_show (m->config_plugin_label);
	gtk_box_pack_start (GTK_BOX (configure_page), m->config_plugin_label, FALSE, FALSE, 6);

	store = gtk_list_store_new (4, G_TYPE_BOOLEAN, G_TYPE_STRING, G_TYPE_POINTER, G_TYPE_POINTER);

	/* fill store */
	m->plugins = e_plugin_list_plugins ();

	for (l = m->plugins; l; l = g_slist_next (l)) {
		EPlugin *ep = l->data;
		GtkTreeIter iter;
		GtkWidget *cfg_widget;

		if (!g_getenv ("EVO_SHOW_ALL_PLUGINS")) {
			/* hide ourselves always */
			if (ep->flags & E_PLUGIN_FLAGS_SYSTEM_PLUGIN)
				continue;

		} else {
			/* Never ever show plugin-manager. User may disable it */
			if (!strcmp (ep->id, "org.gnome.evolution.plugin.manager"))
				continue;
		}

		cfg_widget = e_plugin_get_configure_widget (ep);
		if (cfg_widget) {
			gtk_widget_hide (cfg_widget);
			gtk_box_pack_start (GTK_BOX (configure_page), cfg_widget, TRUE, TRUE, 6);
		}

		gtk_list_store_append (store, &iter);
		gtk_list_store_set (store, &iter,
				    COL_PLUGIN_ENABLED, ep->enabled,
				    COL_PLUGIN_NAME, ep->name ? ep->name : ep->id,
				    COL_PLUGIN_DATA, ep,
				    COL_PLUGIN_CFG_WIDGET, cfg_widget,
				    -1);

	}

	/* setup the treeview */
	m->treeview = GTK_TREE_VIEW (gtk_tree_view_new ());
	gtk_tree_view_set_reorderable (m->treeview, FALSE);
	gtk_tree_view_set_model (m->treeview, GTK_TREE_MODEL (store));
	gtk_tree_view_set_search_column (m->treeview, COL_PLUGIN_NAME);
	gtk_tree_view_set_headers_visible (m->treeview, TRUE);

	m->model = GTK_TREE_MODEL (store);

	renderer = gtk_cell_renderer_toggle_new ();
	gtk_tree_view_insert_column_with_attributes (m->treeview,
						     COL_PLUGIN_ENABLED, _("Enabled"),
						     renderer, "active", COL_PLUGIN_ENABLED,
						     NULL);
	g_signal_connect (renderer, "toggled", G_CALLBACK (eppm_enable_toggled), m);

	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (m->treeview,
						     COL_PLUGIN_NAME, _("Plugin"),
						     renderer, "text", COL_PLUGIN_NAME,
						     NULL);

	/* set sort column */
	gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (m->model), COL_PLUGIN_NAME, GTK_SORT_ASCENDING);

	w = gtk_scrolled_window_new (NULL, NULL);
	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (w), GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);
	gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (w), GTK_SHADOW_IN);
	gtk_container_add (GTK_CONTAINER (w), GTK_WIDGET (m->treeview));

	gtk_box_pack_start (GTK_BOX (hbox), GTK_WIDGET (w), FALSE, TRUE, 6);

	/* Show all widgets in hbox before we pack there notebook, because not all widgets in notebook
	   are going to be visible at one moment. */
	gtk_widget_show_all (hbox);

	gtk_box_pack_start (GTK_BOX (hbox), notebook, TRUE, TRUE, 6);

	/* this is plugin's name label */
	subvbox = gtk_vbox_new (FALSE, 6);
	m->items[0] = g_object_new (gtk_label_get_type (),
				    "wrap", TRUE,
				    "selectable", FALSE,
				    "xalign", 0.0,
				    "yalign", 0.0, NULL);
	gtk_box_pack_start (GTK_BOX (subvbox), GTK_WIDGET (m->items[0]), TRUE, TRUE, 0);
	gtk_box_pack_start (GTK_BOX (overview_page), subvbox, FALSE, TRUE, 6);

	/* this is every other data */
	for (i = 1; i < LABEL_LAST; i++) {
		gchar *markup;

		subvbox = gtk_vbox_new (FALSE, 6);

		markup = g_strdup_printf ("<span weight=\"bold\">%s:</span>", _(label_info[i].label));
		m->labels[i] = g_object_new (gtk_label_get_type (),
					     "label", markup,
					     "use_markup", TRUE,
					     "xalign", 0.0,
					     "yalign", 0.0, NULL);
		gtk_box_pack_start (GTK_BOX (subvbox), GTK_WIDGET (m->labels[i]), FALSE, TRUE, 0);
		g_free (markup);

		m->items[i] = g_object_new (gtk_label_get_type (),
					    "wrap", TRUE,
					    "selectable", TRUE,
					    "can-focus", FALSE,
					    "xalign", 0.0,
					    "yalign", 0.0, NULL);
		gtk_box_pack_start (GTK_BOX (subvbox), GTK_WIDGET (m->items[i]), TRUE, TRUE, 0);

		gtk_box_pack_start (GTK_BOX (overview_page), subvbox, FALSE, TRUE, 6);
	}

	gtk_widget_show_all (overview_page);

	selection = gtk_tree_view_get_selection (m->treeview);
	gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
	g_signal_connect (selection, "changed", G_CALLBACK (eppm_selection_changed), m);

	atk_object_set_name (gtk_widget_get_accessible (GTK_WIDGET (m->treeview)), _("Plugin"));

	gtk_dialog_run (GTK_DIALOG (dialog));

	gtk_widget_destroy (dialog);
	eppm_free (m);
}

static GtkActionEntry entries[] = {

	{ "plugin-manager",
	  NULL,
	  N_("_Plugins"),
	  NULL,
	  N_("Enable and disable plugins"),
	  G_CALLBACK (action_plugin_manager_cb) }
};

gboolean
e_plugin_ui_init (GtkUIManager *ui_manager,
                  EShellWindow *shell_window)
{
	GtkActionGroup *action_group;

	action_group = E_SHELL_WINDOW_ACTION_GROUP_SHELL (shell_window);

	/* Add actions to the "shell" action group. */
	gtk_action_group_add_actions (
		action_group, entries,
		G_N_ELEMENTS (entries), shell_window);

	return TRUE;
}