/*
 * evolution-book-config-carddav.c
 *
 * 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.
 *
 * 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 General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "evolution-config.h"

#include <glib/gi18n-lib.h>

#include <libebackend/libebackend.h>
#include <libedataserverui/libedataserverui.h>

#include <e-util/e-util.h>

typedef ESourceConfigBackend EBookConfigCardDAV;
typedef ESourceConfigBackendClass EBookConfigCardDAVClass;

typedef struct _Context Context;

struct _Context {
	ESourceConfigBackend *backend;		/* not referenced */
	ESource *scratch_source;		/* not referenced */

	GtkWidget *url_entry;
	GtkWidget *find_button;
	GtkWidget *avoid_ifmatch;
};

/* Module Entry Points */
void e_module_load (GTypeModule *type_module);
void e_module_unload (GTypeModule *type_module);

/* Forward Declarations */
GType e_book_config_carddav_get_type (void);

G_DEFINE_DYNAMIC_TYPE (
	EBookConfigCardDAV,
	e_book_config_carddav,
	E_TYPE_SOURCE_CONFIG_BACKEND)

static void
book_config_carddav_context_free (Context *context)
{
	g_clear_object (&context->url_entry);
	g_clear_object (&context->find_button);
	g_clear_object (&context->avoid_ifmatch);

	g_slice_free (Context, context);
}

static GtkWindow *
carddav_config_get_dialog_parent_cb (ECredentialsPrompter *prompter,
				     GtkWindow *dialog)
{
	return dialog;
}

static void
book_config_carddav_run_dialog (GtkButton *button,
				Context *context)
{
	ESourceConfig *config;
	ESourceRegistry *registry;
	ESourceWebdav *webdav_extension;
	ECredentialsPrompter *prompter;
	GUri *guri;
	gchar *base_url;
	GtkDialog *dialog;
	gpointer parent;
	gulong handler_id;
	guint supports_filter = 0;
	const gchar *title = NULL;

	config = e_source_config_backend_get_config (context->backend);
	registry = e_source_config_get_registry (config);

	parent = gtk_widget_get_toplevel (GTK_WIDGET (config));
	parent = gtk_widget_is_toplevel (parent) ? parent : NULL;

	supports_filter = E_WEBDAV_DISCOVER_SUPPORTS_CONTACTS;
	title = _("Choose an Address Book");

	webdav_extension = e_source_get_extension (context->scratch_source, E_SOURCE_EXTENSION_WEBDAV_BACKEND);

	guri = e_source_webdav_dup_uri (webdav_extension);

	prompter = e_credentials_prompter_new (registry);
	e_credentials_prompter_set_auto_prompt (prompter, FALSE);
	base_url = g_uri_to_string_partial (guri, G_URI_HIDE_PASSWORD);

	dialog = e_webdav_discover_dialog_new (parent, title, prompter, context->scratch_source, base_url, supports_filter);

	if (parent != NULL)
		e_binding_bind_property (
			parent, "icon-name",
			dialog, "icon-name",
			G_BINDING_SYNC_CREATE);

	handler_id = g_signal_connect (prompter, "get-dialog-parent",
		G_CALLBACK (carddav_config_get_dialog_parent_cb), dialog);

	e_webdav_discover_dialog_refresh (dialog);

	if (gtk_dialog_run (dialog) == GTK_RESPONSE_ACCEPT) {
		gchar *href = NULL, *display_name = NULL, *color = NULL, *email;
		guint supports = 0, order = 0;
		GtkWidget *content;

		content = e_webdav_discover_dialog_get_content (dialog);

		if (e_webdav_discover_content_get_selected (content, 0, &href, &supports, &display_name, &color, &order)) {
			g_uri_unref (guri);
			guri = g_uri_parse (href, SOUP_HTTP_URI_FLAGS | G_URI_FLAGS_PARSE_RELAXED, NULL);

			if (guri) {
				ESourceAddressBook *addressbook_extension;

				addressbook_extension = e_source_get_extension (context->scratch_source, E_SOURCE_EXTENSION_ADDRESS_BOOK);

				e_source_set_display_name (context->scratch_source, display_name);

				e_source_webdav_set_display_name (webdav_extension, display_name);
				e_source_webdav_set_uri (webdav_extension, guri);
				e_source_webdav_set_order (webdav_extension, order);

				e_source_address_book_set_order (addressbook_extension, order);
			}

			g_free (href);
			g_free (display_name);
			g_free (color);

			href = NULL;
			display_name = NULL;
			color = NULL;
		}

		email = e_webdav_discover_content_get_user_address (content);
		if (email && *email)
			e_source_webdav_set_email_address (webdav_extension, email);
		g_free (email);
	}

	g_signal_handler_disconnect (prompter, handler_id);

	gtk_widget_destroy (GTK_WIDGET (dialog));

	g_object_unref (prompter);
	if (guri)
		g_uri_unref (guri);
	g_free (base_url);
}

static void
book_config_carddav_insert_widgets (ESourceConfigBackend *backend,
				    ESource *scratch_source)
{
	ESourceConfig *config;
	ESource *collection_source;
	ESourceExtension *extension;
	GtkWidget *widget;
	Context *context;
	const gchar *extension_name;
	const gchar *uid;

	context = g_slice_new0 (Context);
	uid = e_source_get_uid (scratch_source);
	config = e_source_config_backend_get_config (backend);
	collection_source = e_source_config_get_collection_source (config);

	context->backend = backend;
	context->scratch_source = scratch_source;

	g_object_set_data_full (
		G_OBJECT (backend), uid, context,
		(GDestroyNotify) book_config_carddav_context_free);

	extension_name = E_SOURCE_EXTENSION_WEBDAV_BACKEND;
	extension = e_source_get_extension (scratch_source, extension_name);

	if (collection_source) {
		widget = gtk_label_new ("");
		g_object_set (G_OBJECT (widget),
			"ellipsize", PANGO_ELLIPSIZE_MIDDLE,
			"selectable", TRUE,
			NULL);
		e_source_config_insert_widget (config, scratch_source, _("URL:"), widget);
		gtk_widget_show (widget);

		e_binding_bind_property_full (
			extension, "uri",
			widget, "label",
			G_BINDING_SYNC_CREATE,
			e_binding_transform_uri_to_text,
			NULL,
			g_object_ref (scratch_source),
			(GDestroyNotify) g_object_unref);
	} else {
		widget = gtk_entry_new ();
		e_source_config_insert_widget (config, scratch_source, _("URL:"), widget);
		context->url_entry = g_object_ref (widget);
		gtk_widget_show (widget);
	}

	e_source_config_add_secure_connection_for_webdav (
		config, scratch_source);

	if (!collection_source) {
		e_source_config_add_user_entry (config, scratch_source);

		widget = gtk_button_new_with_label (_("Find Address Books"));
		e_source_config_insert_widget (config, scratch_source, NULL, widget);
		context->find_button = g_object_ref (widget);
		gtk_widget_show (widget);

		g_signal_connect (
			widget, "clicked",
			G_CALLBACK (book_config_carddav_run_dialog), context);
	}

	widget = gtk_check_button_new_with_label (
		_("Avoid IfMatch (needed on Apache < 2.2.8)"));
	e_source_config_insert_widget (
		config, scratch_source, NULL, widget);
	context->avoid_ifmatch = g_object_ref (widget);
	gtk_widget_show (widget);

	e_source_config_add_refresh_interval (config, scratch_source);
	e_source_config_add_refresh_on_metered_network (config, scratch_source);

	e_binding_bind_property (
		extension, "avoid-ifmatch",
		context->avoid_ifmatch, "active",
		G_BINDING_BIDIRECTIONAL |
		G_BINDING_SYNC_CREATE);

	if (context->url_entry) {
		e_binding_bind_property_full (
			extension, "uri",
			context->url_entry, "text",
			G_BINDING_BIDIRECTIONAL |
			G_BINDING_SYNC_CREATE,
			e_binding_transform_uri_to_text,
			e_binding_transform_text_to_uri,
			NULL, (GDestroyNotify) NULL);
	}
}

static gboolean
book_config_carddav_check_complete (ESourceConfigBackend *backend,
				    ESource *scratch_source)
{
	GUri *guri;
	GtkEntry *entry;
	Context *context;
	const gchar *uri_string;
	const gchar *uid;
	gboolean complete;

	uid = e_source_get_uid (scratch_source);
	context = g_object_get_data (G_OBJECT (backend), uid);
	g_return_val_if_fail (context != NULL, FALSE);

	if (!context->url_entry)
		return TRUE;

	entry = GTK_ENTRY (context->url_entry);
	uri_string = gtk_entry_get_text (entry);

	guri = g_uri_parse (uri_string, SOUP_HTTP_URI_FLAGS | G_URI_FLAGS_PARSE_RELAXED, NULL);
	complete = guri && (g_strcmp0 (g_uri_get_scheme (guri), "http") == 0 ||
			    g_strcmp0 (g_uri_get_scheme (guri), "https") == 0) &&
			    g_uri_get_host (guri) && g_uri_get_path (guri);

	if (guri)
		g_uri_unref (guri);

	e_util_set_entry_issue_hint (context->url_entry, complete ? NULL : _("URL is not a valid http:// nor https:// URL"));

	return complete;
}

static void
e_book_config_carddav_class_init (ESourceConfigBackendClass *class)
{
	EExtensionClass *extension_class;

	extension_class = E_EXTENSION_CLASS (class);
	extension_class->extensible_type = E_TYPE_BOOK_SOURCE_CONFIG;

	class->parent_uid = "carddav-stub";
	class->backend_name = "carddav";
	class->insert_widgets = book_config_carddav_insert_widgets;
	class->check_complete = book_config_carddav_check_complete;
}

static void
e_book_config_carddav_class_finalize (ESourceConfigBackendClass *class)
{
}

static void
e_book_config_carddav_init (ESourceConfigBackend *backend)
{
}

G_MODULE_EXPORT void
e_module_load (GTypeModule *type_module)
{
	e_book_config_carddav_register_type (type_module);
}

G_MODULE_EXPORT void
e_module_unload (GTypeModule *type_module)
{
}
