/*
 *
 *  oFono - Open Source Telephony
 *
 *  Copyright (C) 2017 Vincent Cesson. All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

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

#include <errno.h>
#include <stdlib.h>

#include <glib.h>
#include <gatchat.h>
#include <gattty.h>

#define OFONO_API_SUBJECT_TO_CHANGE
#include <ofono/plugin.h>
#include <ofono/log.h>
#include <ofono/modem.h>
#include <ofono/call-barring.h>
#include <ofono/call-forwarding.h>
#include <ofono/call-meter.h>
#include <ofono/call-settings.h>
#include <ofono/devinfo.h>
#include <ofono/message-waiting.h>
#include <ofono/netreg.h>
#include <ofono/phonebook.h>
#include <ofono/sim.h>
#include <ofono/sms.h>
#include <ofono/ussd.h>
#include <ofono/voicecall.h>
#include <ofono/gprs.h>
#include <ofono/gprs-context.h>
#include <ofono/location-reporting.h>

#include <drivers/atmodem/atutil.h>
#include <drivers/atmodem/vendor.h>


struct gemalto_data {
	GAtChat *app;
	GAtChat *mdm;
};

static int gemalto_probe(struct ofono_modem *modem)
{
	struct gemalto_data *data;

	data = g_try_new0(struct gemalto_data, 1);
	if (data == NULL)
		return -ENOMEM;

	ofono_modem_set_data(modem, data);

	return 0;
}

static void gemalto_remove(struct ofono_modem *modem)
{
	struct gemalto_data *data = ofono_modem_get_data(modem);

	ofono_modem_set_data(modem, NULL);
	g_free(data);
}

static void gemalto_debug(const char *str, void *user_data)
{
	const char *prefix = user_data;

	ofono_info("%s%s", prefix, str);
}

static GAtChat *open_device(const char *device)
{
	GAtSyntax *syntax;
	GIOChannel *channel;
	GAtChat *chat;

	DBG("Opening device %s", device);

	channel = g_at_tty_open(device, NULL);
	if (channel == NULL)
		return NULL;

	syntax = g_at_syntax_new_gsm_permissive();
	chat = g_at_chat_new(channel, syntax);
	g_at_syntax_unref(syntax);
	g_io_channel_unref(channel);

	if (chat == NULL)
		return NULL;

	return chat;
}

static int gemalto_enable(struct ofono_modem *modem)
{
	struct gemalto_data *data = ofono_modem_get_data(modem);
	const char *app, *mdm;

	DBG("%p", modem);

	app = ofono_modem_get_string(modem, "Application");
	mdm = ofono_modem_get_string(modem, "Modem");

	if (app == NULL || mdm == NULL)
		return -EINVAL;

	/* Open devices */
	data->app = open_device(app);
	if (data->app == NULL)
		return -EINVAL;

	data->mdm = open_device(mdm);
	if (data->mdm == NULL) {
		g_at_chat_unref(data->app);
		data->app = NULL;
		return -EINVAL;
	}

	if (getenv("OFONO_AT_DEBUG")) {
		g_at_chat_set_debug(data->app, gemalto_debug, "App");
		g_at_chat_set_debug(data->mdm, gemalto_debug, "Mdm");
	}

	return 0;
}

static int gemalto_disable(struct ofono_modem *modem)
{
	struct gemalto_data *data = ofono_modem_get_data(modem);

	DBG("%p", modem);

	g_at_chat_send(data->app, "AT^SMSO", NULL, NULL, NULL, NULL);

	ofono_modem_set_data(modem, NULL);

	return 0;
}

static void set_online_cb(gboolean ok, GAtResult *result, gpointer user_data)
{
	struct cb_data *cbd = user_data;
	ofono_modem_online_cb_t cb = cbd->cb;
	struct ofono_error error;

	decode_at_error(&error, g_at_result_final_response(result));

	cb(&error, cbd->data);
}

static void gemalto_set_online(struct ofono_modem *modem, ofono_bool_t online,
		ofono_modem_online_cb_t cb, void *user_data)
{
	struct gemalto_data *data = ofono_modem_get_data(modem);
	struct cb_data *cbd = cb_data_new(cb, user_data);
	char const *command = online ? "AT+CFUN=1" : "AT+CFUN=0";

	DBG("modem %p %s", modem, online ? "online" : "offline");

	if (g_at_chat_send(data->app, command, NULL, set_online_cb, cbd, g_free))
		return;

	CALLBACK_WITH_FAILURE(cb, cbd->data);

	g_free(cbd);
}

static void gemalto_pre_sim(struct ofono_modem *modem)
{
	struct gemalto_data *data = ofono_modem_get_data(modem);
	struct ofono_sim *sim;

	DBG("%p", modem);

	ofono_devinfo_create(modem, 0, "atmodem", data->app);
	sim = ofono_sim_create(modem, 0, "atmodem", data->app);
	ofono_voicecall_create(modem, 0, "atmodem", data->app);
	ofono_location_reporting_create(modem, 0, "gemaltomodem", data->app);

	if (sim)
		ofono_sim_inserted_notify(sim, TRUE);
}

static void gemalto_post_sim(struct ofono_modem *modem)
{
	struct gemalto_data *data = ofono_modem_get_data(modem);

	DBG("%p", modem);

	ofono_phonebook_create(modem, 0, "atmodem", data->app);

	ofono_sms_create(modem, 0, "atmodem", data->app);
}

static void gemalto_post_online(struct ofono_modem *modem)
{
	struct gemalto_data *data = ofono_modem_get_data(modem);
	struct ofono_message_waiting *mw;
	struct ofono_gprs *gprs;
	struct ofono_gprs_context *gc;

	DBG("%p", modem);

	ofono_ussd_create(modem, 0, "atmodem", data->app);
	ofono_call_forwarding_create(modem, 0, "atmodem", data->app);
	ofono_call_settings_create(modem, 0, "atmodem", data->app);
	ofono_netreg_create(modem, OFONO_VENDOR_CINTERION, "atmodem", data->app);
	ofono_call_meter_create(modem, 0, "atmodem", data->app);
	ofono_call_barring_create(modem, 0, "atmodem", data->app);

	gprs = ofono_gprs_create(modem, 0, "atmodem", data->app);
	gc = ofono_gprs_context_create(modem, 0, "atmodem", data->mdm);

	if (gprs && gc)
		ofono_gprs_add_context(gprs, gc);

	mw = ofono_message_waiting_create(modem);
	if (mw)
		ofono_message_waiting_register(mw);
}

static struct ofono_modem_driver gemalto_driver = {
	.name		= "gemalto",
	.probe		= gemalto_probe,
	.remove		= gemalto_remove,
	.enable		= gemalto_enable,
	.disable	= gemalto_disable,
	.set_online	= gemalto_set_online,
	.pre_sim	= gemalto_pre_sim,
	.post_sim	= gemalto_post_sim,
	.post_online	= gemalto_post_online,
};

static int gemalto_init(void)
{
	return ofono_modem_driver_register(&gemalto_driver);
}

static void gemalto_exit(void)
{
	ofono_modem_driver_unregister(&gemalto_driver);
}

OFONO_PLUGIN_DEFINE(gemalto, "Gemalto modem plugin", VERSION,
		OFONO_PLUGIN_PRIORITY_DEFAULT, gemalto_init, gemalto_exit)