/*
 * 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)
 *
 */

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

#include <string.h>
#include <fcntl.h>
#include <stdlib.h>

#include <glib.h>
#include <gio/gio.h>

#include "e-cal-popup.h"
#include <libedataserver/e-data-server-util.h>
#include <libedataserverui/e-source-selector.h>

#include <camel/camel-mime-part.h>
#include <camel/camel-stream-vfs.h>
#include "e-util/e-util.h"
#include <glib/gi18n.h>
#include "e-util/e-mktemp.h"
#include "e-util/e-dialog-utils.h"

#include "gui/e-calendar-view.h"
#include "gui/e-cal-model.h"
#include "itip-utils.h"
#include "e-attachment.h"

static GObjectClass *ecalp_parent;

static void
ecalp_init(GObject *o)
{
	/*ECalPopup *eabp = (ECalPopup *)o; */
}

static void
ecalp_finalise(GObject *o)
{
	((GObjectClass *)ecalp_parent)->finalize(o);
}

static void
ecalp_target_free(EPopup *ep, EPopupTarget *t)
{
	switch (t->type) {
	case E_CAL_POPUP_TARGET_SELECT: {
		ECalPopupTargetSelect *s = (ECalPopupTargetSelect *)t;
		gint i;

		for (i=0;i<s->events->len;i++)
			e_cal_model_free_component_data(s->events->pdata[i]);
		g_ptr_array_free(s->events, TRUE);
		g_object_unref(s->model);
		break; }
	case E_CAL_POPUP_TARGET_SOURCE: {
		ECalPopupTargetSource *s = (ECalPopupTargetSource *)t;

		g_object_unref(s->selector);
		break; }
	}

	((EPopupClass *)ecalp_parent)->target_free(ep, t);
}

/* Standard menu code */

static void
ecalp_class_init(GObjectClass *klass)
{
	klass->finalize = ecalp_finalise;
	((EPopupClass *)klass)->target_free = ecalp_target_free;
}

GType
e_cal_popup_get_type(void)
{
	static GType type = 0;

	if (type == 0) {
		static const GTypeInfo info = {
			sizeof(ECalPopupClass),
			NULL, NULL,
			(GClassInitFunc)ecalp_class_init,
			NULL, NULL,
			sizeof(ECalPopup), 0,
			(GInstanceInitFunc)ecalp_init
		};
		ecalp_parent = g_type_class_ref(e_popup_get_type());
		type = g_type_register_static(e_popup_get_type(), "ECalPopup", &info, 0);
	}

	return type;
}

ECalPopup *e_cal_popup_new(const gchar *menuid)
{
	ECalPopup *eabp = g_object_new(e_cal_popup_get_type(), NULL);

	e_popup_construct(&eabp->popup, menuid);

	return eabp;
}

static icalproperty *
get_attendee_prop (icalcomponent *icalcomp, const gchar *address)
{

	icalproperty *prop;

	if (!(address && *address))
		return NULL;

	for (prop = icalcomponent_get_first_property (icalcomp, ICAL_ATTENDEE_PROPERTY);
			prop;
			prop = icalcomponent_get_next_property (icalcomp, ICAL_ATTENDEE_PROPERTY)) {
		const gchar *attendee = icalproperty_get_attendee (prop);

		if (g_str_equal (itip_strip_mailto (attendee), address)) {
			return prop;
		}
	}
	return NULL;
}

static gboolean
is_delegated (icalcomponent *icalcomp, gchar *user_email)
{
	icalproperty *prop;
	icalparameter *param;
	const gchar *delto = NULL;

	prop = get_attendee_prop (icalcomp, user_email);

	if (prop) {
		param = icalproperty_get_first_parameter (prop, ICAL_DELEGATEDTO_PARAMETER);
		if (param)
			delto = icalparameter_get_delegatedto (param);
	} else
		return FALSE;

	prop = get_attendee_prop (icalcomp, itip_strip_mailto (delto));

	if (prop) {
		const gchar *delfrom = NULL;
		icalparameter_partstat status = ICAL_PARTSTAT_NONE;

		param = icalproperty_get_first_parameter (prop, ICAL_DELEGATEDFROM_PARAMETER);
		if (param)
			delfrom = icalparameter_get_delegatedfrom (param);
		param = icalproperty_get_first_parameter (prop, ICAL_PARTSTAT_PARAMETER);
		if (param)
			status = icalparameter_get_partstat (param);
		if ((delfrom && *delfrom) && g_str_equal (itip_strip_mailto (delfrom), user_email)
				&& status != ICAL_PARTSTAT_DECLINED)
			return TRUE;
	}

	return FALSE;
}

static gboolean
needs_to_accept (icalcomponent *icalcomp, gchar *user_email)
{
	icalproperty *prop;
	icalparameter *param;
	icalparameter_partstat status = ICAL_PARTSTAT_NONE;

	prop = get_attendee_prop (icalcomp, user_email);

	/* It might be a mailing list */
	if (!prop)
		return TRUE;
	param = icalproperty_get_first_parameter (prop, ICAL_PARTSTAT_PARAMETER);
	if (param)
		status = icalparameter_get_partstat (param);

	if (status == ICAL_PARTSTAT_ACCEPTED || status == ICAL_PARTSTAT_TENTATIVE)
		return FALSE;

	return TRUE;
}

/**
 * e_cal_popup_target_new_select:
 * @eabp:
 * @model: The calendar model.
 * @events: An array of pointers to ECalModelComponent items.  These
 * items must be copied.  They, and the @events array will be freed by
 * the popup menu automatically.
 *
 * Create a new selection popup target.
 *
 * Return value:
 **/
ECalPopupTargetSelect *
e_cal_popup_target_new_select(ECalPopup *eabp, struct _ECalModel *model, GPtrArray *events)
{
	ECalPopupTargetSelect *t = e_popup_target_new(&eabp->popup, E_CAL_POPUP_TARGET_SELECT, sizeof(*t));
	guint32 mask = ~0;
	ECal *client;
	gboolean read_only, user_org = FALSE;

	/* FIXME: This is duplicated in e-cal-menu */

	t->model = model;
	g_object_ref(t->model);
	t->events = events;

	if (t->events->len == 0) {
		client = e_cal_model_get_default_client(t->model);
	} else {
		ECalModelComponent *comp_data = (ECalModelComponent *)t->events->pdata[0];
		ECalComponent *comp;
		gchar *user_email = NULL;

		comp = e_cal_component_new ();
		e_cal_component_set_icalcomponent (comp, icalcomponent_new_clone (comp_data->icalcomp));
		user_email = itip_get_comp_attendee (comp, comp_data->client);

		mask &= ~E_CAL_POPUP_SELECT_ANY;
		if (t->events->len == 1)
			mask &= ~E_CAL_POPUP_SELECT_ONE;
		else {
			gint i=0;

			mask &= ~E_CAL_POPUP_SELECT_MANY;
			/* Now check for any incomplete tasks and set the flags*/
			for (; i < t->events->len; i++) {
				ECalModelComponent *comp_data = (ECalModelComponent *)t->events->pdata[i];
				if (!icalcomponent_get_first_property (comp_data->icalcomp, ICAL_COMPLETED_PROPERTY))
					mask &= ~E_CAL_POPUP_SELECT_NOTCOMPLETE;
				else
					mask &= ~E_CAL_POPUP_SELECT_COMPLETE;
			}
		}

		if (icalcomponent_get_first_property (comp_data->icalcomp, ICAL_URL_PROPERTY))
			mask &= ~E_CAL_POPUP_SELECT_HASURL;

		if (e_cal_util_component_has_recurrences (comp_data->icalcomp))
			mask &= ~E_CAL_POPUP_SELECT_RECURRING;
		else if (e_cal_util_component_is_instance (comp_data->icalcomp))
			mask &= ~E_CAL_POPUP_SELECT_RECURRING;
		else
			mask &= ~E_CAL_POPUP_SELECT_NONRECURRING;

		if (e_cal_util_component_is_instance (comp_data->icalcomp))
			mask &= ~E_CAL_POPUP_SELECT_INSTANCE;

		if (e_cal_util_component_has_attendee (comp_data->icalcomp))
			mask &= ~E_CAL_POPUP_SELECT_MEETING;

		if (!e_cal_get_save_schedules (comp_data->client))
			mask &= ~E_CAL_POPUP_SELECT_NOSAVESCHEDULES;

		if (e_cal_util_component_has_organizer (comp_data->icalcomp)) {

			if (itip_organizer_is_user (comp, comp_data->client)) {
				mask &= ~E_CAL_POPUP_SELECT_ORGANIZER;
				user_org = TRUE;
			}

		} else {
			/* organiser is synonym for owner in this case */
			mask &= ~(E_CAL_POPUP_SELECT_ORGANIZER|E_CAL_POPUP_SELECT_NOTMEETING);
		}

		client = comp_data->client;

		if (e_cal_get_static_capability (client, CAL_STATIC_CAPABILITY_DELEGATE_SUPPORTED)) {

			if (e_cal_get_static_capability (client, CAL_STATIC_CAPABILITY_DELEGATE_TO_MANY))
				mask &= ~E_CAL_POPUP_SELECT_DELEGATABLE;
			else if (!user_org && !is_delegated (comp_data->icalcomp, user_email))
				mask &= ~E_CAL_POPUP_SELECT_DELEGATABLE;
		}

		if (e_cal_get_static_capability (client, CAL_STATIC_CAPABILITY_HAS_UNACCEPTED_MEETING) &&
				needs_to_accept (comp_data->icalcomp, user_email))
			mask &= ~E_CAL_POPUP_SELECT_ACCEPTABLE;

		if (!icalcomponent_get_first_property (comp_data->icalcomp, ICAL_COMPLETED_PROPERTY))
			mask &= ~E_CAL_POPUP_SELECT_NOTCOMPLETE;

		if (icalcomponent_get_first_property (comp_data->icalcomp, ICAL_COMPLETED_PROPERTY))
			mask &= ~E_CAL_POPUP_SELECT_COMPLETE;

		g_object_unref (comp);
		g_free (user_email);
	}

	e_cal_is_read_only(client, &read_only, NULL);
	if (!read_only)
		mask &= ~E_CAL_POPUP_SELECT_EDITABLE;

	if (!e_cal_get_static_capability (client, CAL_STATIC_CAPABILITY_NO_TASK_ASSIGNMENT)
	    && !e_cal_get_static_capability (client, CAL_STATIC_CAPABILITY_NO_CONV_TO_ASSIGN_TASK))
		mask &= ~E_CAL_POPUP_SELECT_ASSIGNABLE;

	/* This bit isn't implemented ... */
	mask &= ~E_CAL_POPUP_SELECT_NOTEDITING;

	t->target.mask = mask;

	return t;
}

ECalPopupTargetSource *
e_cal_popup_target_new_source(ECalPopup *eabp, ESourceSelector *selector)
{
	ECalPopupTargetSource *t = e_popup_target_new(&eabp->popup, E_CAL_POPUP_TARGET_SOURCE, sizeof(*t));
	guint32 mask = ~0;
	const gchar *relative_uri;
	gchar *uri;
	ESource *source;
	const gchar *offline = NULL;
	const gchar *delete = NULL;

	/* TODO: this is duplicated for addressbook too */

	t->selector = selector;
	g_object_ref(selector);

	/* TODO: perhaps we need to copy this so it doesn't change during the lifecycle */
	source = e_source_selector_peek_primary_selection(selector);
	if (source)
		mask &= ~E_CAL_POPUP_SOURCE_PRIMARY;

	/* FIXME Gross hack, should have a property or something */
	relative_uri = e_source_peek_relative_uri(source);
	if (relative_uri && !strcmp("system", relative_uri))
		mask &= ~E_CAL_POPUP_SOURCE_SYSTEM;
	else
		mask &= ~E_CAL_POPUP_SOURCE_USER;

	uri = e_source_get_uri (source);
	if (!uri || (g_ascii_strncasecmp (uri, "file://", 7) && g_ascii_strncasecmp (uri, "contacts://", 11))) {
		/* check for e_target_selector's offline_status property here */
		offline = e_source_get_property (source, "offline_sync");
		if (offline  && strcmp (offline, "1") == 0)
			mask &= ~E_CAL_POPUP_SOURCE_NO_OFFLINE;	/* set the menu item to Mark Offline */
		else
			mask &= ~E_CAL_POPUP_SOURCE_OFFLINE;
	} else {
		mask |= E_CAL_POPUP_SOURCE_NO_OFFLINE;
		mask |= E_CAL_POPUP_SOURCE_OFFLINE;
	}
	g_free (uri);

	/* check for delete_status property here */
	delete = e_source_get_property (source, "delete");
	if (delete && strcmp (delete, "no") == 0)
		mask &= ~E_CAL_POPUP_SOURCE_NO_DELETE;			/* set the menu item to non deletable */
	else
		mask &= ~E_CAL_POPUP_SOURCE_DELETE;

	t->target.mask = mask;

	return t;
}

/* ********************************************************************** */
/* Popup menu plugin handler */

/*
<e-plugin
  class="org.gnome.mail.plugin.popup:1.0"
  id="org.gnome.mail.plugin.popup.iteab:1.0"
  type="shlib"
  location="/opt/gnome2/lib/camel/1.0/libcamelimap.so"
  name="imap"
  description="IMAP4 and IMAP4v1 mail store">
  <hook class="org.gnome.mail.popupMenu:1.0"
        handler="HandlePopup">
  <menu id="any" target="select">
   <iteab
    type="iteab|toggle|radio|image|submenu|bar"
    active
    path="foo/bar"
    label="label"
    icon="foo"
    mask="select_one"
    activate="ecalp_view_eabacs"/>
  </menu>
  </extension>

*/

static gpointer ecalph_parent_class;
#define ecalph ((ECalPopupHook *)eph)

static const EPopupHookTargetMask ecalph_select_masks[] = {
	{ "one", E_CAL_POPUP_SELECT_ONE },
	{ "many", E_CAL_POPUP_SELECT_MANY },
	{ "editable", E_CAL_POPUP_SELECT_EDITABLE },
	{ "recurring", E_CAL_POPUP_SELECT_RECURRING },
	{ "non-recurring", E_CAL_POPUP_SELECT_NONRECURRING },
	{ "instance", E_CAL_POPUP_SELECT_INSTANCE },
	{ "organizer", E_CAL_POPUP_SELECT_ORGANIZER },
	{ "not-editing", E_CAL_POPUP_SELECT_NOTEDITING },
	{ "not-meeting", E_CAL_POPUP_SELECT_NOTMEETING },
	{ "meeting", E_CAL_POPUP_SELECT_MEETING },
	{ "assignable", E_CAL_POPUP_SELECT_ASSIGNABLE },
	{ "hasurl", E_CAL_POPUP_SELECT_HASURL },
	{ "delegate", E_CAL_POPUP_SELECT_DELEGATABLE },
	{ "accept", E_CAL_POPUP_SELECT_ACCEPTABLE },
	{ "not-complete", E_CAL_POPUP_SELECT_NOTCOMPLETE },
	{ "no-save-schedules", E_CAL_POPUP_SELECT_NOSAVESCHEDULES },
	{ "complete" , E_CAL_POPUP_SELECT_COMPLETE},
	{ NULL }
};

static const EPopupHookTargetMask ecalph_source_masks[] = {
	{ "primary", E_CAL_POPUP_SOURCE_PRIMARY },
	{ "system", E_CAL_POPUP_SOURCE_SYSTEM },
	{ "user", E_CAL_POPUP_SOURCE_USER },
	{ "offline", E_CAL_POPUP_SOURCE_OFFLINE},
	{ "no-offline", E_CAL_POPUP_SOURCE_NO_OFFLINE},
	{ "delete", E_CAL_POPUP_SOURCE_DELETE},
	{ "no-delete", E_CAL_POPUP_SOURCE_NO_DELETE},

	{ NULL }
};

static const EPopupHookTargetMask ecalph_attachments_masks[] = {
	{ "one", E_CAL_POPUP_ATTACHMENTS_ONE },
	{ "many", E_CAL_POPUP_ATTACHMENTS_MANY },
	{ "modify", E_CAL_POPUP_ATTACHMENTS_MODIFY },
	{ "multiple", E_CAL_POPUP_ATTACHMENTS_MULTIPLE },
	{ "image", E_CAL_POPUP_ATTACHMENTS_IMAGE },
	{ NULL }
};

static const EPopupHookTargetMap ecalph_targets[] = {
	{ "select", E_CAL_POPUP_TARGET_SELECT, ecalph_select_masks },
	{ "source", E_CAL_POPUP_TARGET_SOURCE, ecalph_source_masks },
	{ "attachments", E_CAL_POPUP_TARGET_ATTACHMENTS, ecalph_attachments_masks },
	{ NULL }
};

static void
ecalph_finalise(GObject *o)
{
	/*EPluginHook *eph = (EPluginHook *)o;*/

	((GObjectClass *)ecalph_parent_class)->finalize(o);
}

static void
ecalph_class_init(EPluginHookClass *klass)
{
	gint i;

	((GObjectClass *)klass)->finalize = ecalph_finalise;
	((EPluginHookClass *)klass)->id = "org.gnome.evolution.calendar.popup:1.0";

	for (i=0;ecalph_targets[i].type;i++)
		e_popup_hook_class_add_target_map((EPopupHookClass *)klass, &ecalph_targets[i]);

	((EPopupHookClass *)klass)->popup_class = g_type_class_ref(e_cal_popup_get_type());
}

GType
e_cal_popup_hook_get_type(void)
{
	static GType type = 0;

	if (!type) {
		static const GTypeInfo info = {
			sizeof(ECalPopupHookClass), NULL, NULL, (GClassInitFunc) ecalph_class_init, NULL, NULL,
			sizeof(ECalPopupHook), 0, (GInstanceInitFunc) NULL,
		};

		ecalph_parent_class = g_type_class_ref(e_popup_hook_get_type());
		type = g_type_register_static(e_popup_hook_get_type(), "ECalPopupHook", &info, 0);
	}

	return type;
}
