/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* Evolution calendar importer component
 *
 * Copyright (C) 2004  Novell, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU 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 General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Authors: Chris Toshok <toshok@ximian.com>
 *          JP Rosevear <jpr@ximian.com>
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <string.h>

#include <gtk/gtkcheckbutton.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkvbox.h>
#include <gtk/gtkmain.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkradiobutton.h>
#include <gtk/gtknotebook.h>
#include <bonobo/bonobo-context.h>
#include <bonobo/bonobo-shlib-factory.h>
#include <bonobo/bonobo-control.h>


#include <libebook/e-book.h>

#include <importer/evolution-importer.h>
#include <importer/GNOME_Evolution_Importer.h>
#include <widgets/misc/e-source-selector.h>
#include <util/eab-book-util.h>

#define COMPONENT_FACTORY_IID "OAFIID:GNOME_Evolution_Addressbook_VCard_ImporterFactory"
#define COMPONENT_IID "OAFIID:GNOME_Evolution_Addressbook_VCard_Importer"

typedef struct {
	ESource *primary;
	
	GList *contactlist;
	GList *iterator;
	EBook *book;
	gboolean ready;
} VCardImporter;

/* EvolutionImporter methods */
static void
process_item_fn (EvolutionImporter *importer,
		 CORBA_Object listener,
		 void *closure,
		 CORBA_Environment *ev)
{
	VCardImporter *gci = (VCardImporter *) closure;
	EContact *contact;

	if (gci->iterator == NULL)
		gci->iterator = gci->contactlist;
	
	if (gci->ready == FALSE) {
		GNOME_Evolution_ImporterListener_notifyResult (listener,
							       GNOME_Evolution_ImporterListener_NOT_READY,
							       gci->iterator ? TRUE : FALSE, 
							       ev);
		return;
	}
	
	if (gci->iterator == NULL) {
		GNOME_Evolution_ImporterListener_notifyResult (listener,
							       GNOME_Evolution_ImporterListener_UNSUPPORTED_OPERATION,
							       FALSE, ev);
		return;
	}
	
	contact = gci->iterator->data;
	/* FIXME Error checking */
	e_book_add_contact (gci->book, contact, NULL);
	
	gci->iterator = gci->iterator->next;
	
	GNOME_Evolution_ImporterListener_notifyResult (listener,
						       GNOME_Evolution_ImporterListener_OK,
						       gci->iterator ? TRUE : FALSE, 
						       ev);
	if (ev->_major != CORBA_NO_EXCEPTION) {
		g_warning ("Error notifying listeners.");
	}
	
	return;
}

static char *supported_extensions[3] = {
	".vcf",
	".gcrd",
	NULL
};

/* Actually check the contents of this file */
static gboolean
check_file_is_vcard (const char *filename)
{
	FILE *handle;
	char line[4096];
	gboolean result;

	handle = fopen (filename, "r");
	if (handle == NULL) {
		g_print ("\n");
		return FALSE;
	}
		
	fgets (line, 4096, handle);
	if (line == NULL) {
		fclose (handle);
		g_print ("\n");
		return FALSE;
	}

	if (g_ascii_strncasecmp (line, "BEGIN:VCARD", 11) == 0) {
		result = TRUE;
	} else {
		result = FALSE;
	}

	fclose (handle);
	return result;
}

static void
primary_selection_changed_cb (ESourceSelector *selector, gpointer data)
{
	VCardImporter *gci = data;

	if (gci->primary)
		g_object_unref (gci->primary);
	gci->primary = g_object_ref (e_source_selector_peek_primary_selection (selector));
}

static void
create_control_fn (EvolutionImporter *importer, Bonobo_Control *control, void *closure)
{
	VCardImporter *gci = closure;
	GtkWidget *vbox, *selector;
	ESource *primary;
	ESourceList *source_list;	
	
	vbox = gtk_vbox_new (FALSE, FALSE);
	
	/* FIXME Better error handling */
	if (!e_book_get_addressbooks (&source_list, NULL))
		return;		

	selector = e_source_selector_new (source_list);
	e_source_selector_show_selection (E_SOURCE_SELECTOR (selector), FALSE);
	gtk_box_pack_start (GTK_BOX (vbox), selector, FALSE, TRUE, 6);
	
	/* FIXME What if no sources? */
	primary = e_source_list_peek_source_any (source_list);
	e_source_selector_set_primary_selection (E_SOURCE_SELECTOR (selector), primary);
	if (!gci->primary)
		gci->primary = g_object_ref (primary);
	g_object_unref (source_list);
		
	g_signal_connect (G_OBJECT (selector), "primary_selection_changed",
			  G_CALLBACK (primary_selection_changed_cb), gci);

	gtk_widget_show_all (vbox);
	
	*control = BONOBO_OBJREF (bonobo_control_new (vbox));
}

static gboolean
support_format_fn (EvolutionImporter *importer,
		   const char *filename,
		   void *closure)
{
	char *ext;
	int i;

	ext = strrchr (filename, '.');
	if (ext == NULL) {
		return check_file_is_vcard (filename);
	}
	for (i = 0; supported_extensions[i] != NULL; i++) {
		if (g_ascii_strcasecmp (supported_extensions[i], ext) == 0)
			return check_file_is_vcard (filename);
	}

	return FALSE;
}

static void
importer_destroy_cb (gpointer data,
		     GObject *where_object_was)
{
	VCardImporter *gci = data;

	if (gci->primary)
		g_object_unref (gci->primary);
	
	if (gci->book)
		g_object_unref (gci->book);

	g_list_foreach (gci->contactlist, (GFunc) g_object_unref, NULL);
	g_list_free (gci->contactlist);

	g_free (gci);
}

static gboolean
load_file_fn (EvolutionImporter *importer,
	      const char *filename,
	      void *closure)
{
	VCardImporter *gci;
	char *contents;
	
	if (check_file_is_vcard (filename) == FALSE) {
		return FALSE;
	}

	gci = (VCardImporter *) closure;
	gci->contactlist = NULL;
	gci->iterator = NULL;
	gci->ready = FALSE;
	
	/* Load the book */
	gci->book = e_book_new ();
	if (!gci->book) {
		g_message (G_STRLOC ":Couldn't create EBook.");
		return FALSE;
	}
	e_book_load_source (gci->book, gci->primary, TRUE, NULL);

	/* Load the file and the contacts */
	if (!g_file_get_contents (filename, &contents, NULL, NULL)) {
		g_message (G_STRLOC ":Couldn't read file.");
		return FALSE;
	}	
	gci->contactlist = eab_contact_list_from_string (contents);
	g_free (contents);

	gci->ready = TRUE;

	return TRUE;
}
					   
static BonoboObject *
factory_fn (BonoboGenericFactory *_factory,
	    const char *component_id,
	    void *closure)
{
	EvolutionImporter *importer;
	VCardImporter *gci;

	if (!strcmp (component_id, COMPONENT_IID)) {
		gci = g_new0 (VCardImporter, 1);
		importer = evolution_importer_new (create_control_fn, support_format_fn, 
						   load_file_fn, process_item_fn, NULL, gci);
	
		g_object_weak_ref (G_OBJECT (importer),
				   importer_destroy_cb, gci);
		return BONOBO_OBJECT (importer);
	}
	else {
		g_warning (COMPONENT_FACTORY_IID ": Don't know what to do with %s", component_id);
		return NULL;
	}
}

BONOBO_ACTIVATION_SHLIB_FACTORY (COMPONENT_FACTORY_IID, "Evolution VCard Importer Factory", factory_fn, NULL)