/*
 *
 *  oFono - Open Source Telephony
 *
 *  Copyright (C) 2008-2011  Intel Corporation. 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 <string.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.h>

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

static const char *cfun_prefix[] = { "+CFUN:", NULL };
static const char *wind_prefix[] = { "+WIND:", NULL };
static const char *none_prefix[] = { NULL };

struct wavecom_data {
	GAtChat *chat;
	int have_enabled;
	gboolean have_sim;
	gboolean have_sms;
};

static enum ofono_vendor vendor(struct ofono_modem *modem)
{
	const char *model;

	model = ofono_modem_get_string(modem, "Model");
	if (model && strcmp(model, "Q2XXX") == 0)
		return OFONO_VENDOR_WAVECOM_Q2XXX;
	return 0;
}

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

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

static int wavecom_probe(struct ofono_modem *modem)
{
	struct wavecom_data *data;

	ofono_error("%p: %s", modem, __func__);

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

	ofono_modem_set_data(modem, data);

	return 0;
}

static void wavecom_remove(struct ofono_modem *modem)
{
	struct wavecom_data *data = ofono_modem_get_data(modem);

	ofono_error("%p: %s", modem, __func__);

	ofono_modem_set_data(modem, NULL);
	g_at_chat_unref(data->chat);
	g_free(data);
}

static void rf_off_cb(gboolean ok, GAtResult *result, gpointer user_data)
{
	struct ofono_modem *modem = user_data;

	ofono_modem_set_powered(modem, TRUE);
}

static void wind_notify(GAtResult *result, gpointer user_data)
{
	struct ofono_modem *modem = user_data;
	struct wavecom_data *data = ofono_modem_get_data(modem);
	struct ofono_sim *sim = __ofono_atom_find(OFONO_ATOM_TYPE_SIM, modem);
	GAtResultIter iter;
	int val;

	ofono_error("%p: %s", modem, __func__);

	g_at_result_iter_init(&iter, result);

	if (!g_at_result_iter_next(&iter, "+WIND:"))
		return;

	if (!g_at_result_iter_next_number(&iter, &val))
		return;

	switch (val) {
	case 3: /* ready to process AT commands */
		ofono_error("%s ready for AT commands. moving to off", ofono_modem_get_string(modem, "Device"));
		if (!data->have_enabled) {
			data->have_enabled = TRUE;
			g_at_chat_send(data->chat, "AT+CFUN=4", none_prefix, rf_off_cb, modem, NULL);
		}
		break;
	case 0: /* sim removed */
		ofono_error("%p sim removed", modem);
		data->have_sim = FALSE;
		if (sim)
			ofono_sim_inserted_notify(sim, FALSE);
		break;
	case 1: /* sim inserted */
		ofono_error("%p sim inserted", modem);
		data->have_sim = TRUE;
		break;
	case 16: /* SMS and SMS-CB services initialized */
		ofono_error("%p SMS ready %d", modem, data->have_sms);
		if (sim)
			ofono_sim_inserted_notify(sim, TRUE);
		break;
	case 7: /* service available for emergency call */
		break;
	case 8: /* network is lost */
	case 10: /* reload status of SIM phonebook */
		break;
	case 11: /* checksum of SIM phoenbook */
	case 13: /* rack has been detected closed */
		break;
	}
}


static void wind_set(gboolean ok, GAtResult *result, gpointer user_data)
{
	ofono_error("%s", __func__);
}

static int wavecom_enable(struct ofono_modem *modem)
{
	struct wavecom_data *data;
	GAtChat *chat;
	GIOChannel *channel;
	GAtSyntax *syntax;
	const char *device;
	GHashTable *options;

	ofono_error("%p: %s", modem, __func__);

 	data = ofono_modem_get_data(modem);

	if (data->chat) {
		ofono_error("%p the chat is still there!!!!", modem);
		g_at_chat_cancel_all(data->chat);
		g_at_chat_unregister_all(data->chat);
		g_at_chat_unref(data->chat);
		data->chat = NULL;
	}

	device = ofono_modem_get_string(modem, "Device");
	if (device == NULL)
		return -EINVAL;

	options = g_hash_table_new(g_str_hash, g_str_equal);

	if (options == NULL)
		return -ENOMEM;

	g_hash_table_insert(options, "Baud", "115200");
	g_hash_table_insert(options, "Parity", "none");
	g_hash_table_insert(options, "StopBits", "1");
	g_hash_table_insert(options, "DataBits", "8");

	channel = g_at_tty_open(device, options);

	g_hash_table_destroy(options);

	if (channel == NULL)
		return -EIO;

	/*
	 * Could not figure out whether it is fully compliant or not, use
	 * permissive for now
	 * */
	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 -ENOMEM;

	g_at_chat_register(chat, "+WIND", wind_notify,
			   FALSE, modem, NULL);

	g_at_chat_add_terminator(chat, "+CPIN:", 6, TRUE);

	if (getenv("OFONO_AT_DEBUG"))
		g_at_chat_set_debug(chat, wavecom_debug, "");

	data->chat = chat;

	g_at_chat_send(chat, "AT+WIND=32767", wind_prefix,
			wind_set, modem, NULL);

	/* restart and wait for the +WIND */
	data->have_enabled = FALSE;
	data->have_sim = FALSE;
	guint res = g_at_chat_send(chat, "AT+CFUN=1,1", none_prefix,
			NULL, modem, NULL);
	ofono_error("%p %p reset res %d\n", chat, modem, res);

	return -EINPROGRESS;
}

static void cfun_disable(gboolean ok, GAtResult *result, gpointer user_data)
{
	struct ofono_modem *modem = user_data;
	struct wavecom_data *data = ofono_modem_get_data(modem);

	ofono_error("%p: %s", modem, __func__);

	g_at_chat_unref(data->chat);
	data->chat = NULL;

	if (ok)
		ofono_modem_set_powered(modem, FALSE);
	else
		ofono_error("%p power down has failed!!!!", modem);
}

static int wavecom_disable(struct ofono_modem *modem)
{
	struct wavecom_data *data = ofono_modem_get_data(modem);

	ofono_error("%p: %s", modem, __func__);

	g_at_chat_cancel_all(data->chat);
	g_at_chat_unregister_all(data->chat);

	g_at_chat_send(data->chat, "AT+CFUN=0", cfun_prefix,
					cfun_disable, modem, NULL);

	return -EINPROGRESS;
}

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 wavecom_set_online(struct ofono_modem *modem, ofono_bool_t online,
				ofono_modem_online_cb_t cb, void *user_data)
{
	struct wavecom_data *data = ofono_modem_get_data(modem);
	struct cb_data *cbd = cb_data_new(cb, user_data);
	char const *command = online ? "AT+CFUN=1,0" : "AT+CFUN=4";

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

	if (g_at_chat_send(data->chat, command, cfun_prefix, set_online_cb,
					cbd, g_free) > 0)
		return;

	CALLBACK_WITH_FAILURE(cb, cbd->data);

	g_free(cbd);
}

static void wavecom_pre_sim(struct ofono_modem *modem)
{
	struct wavecom_data *data = ofono_modem_get_data(modem);
	struct ofono_sim *sim;

	ofono_error("%p: %s", modem, __func__);

	ofono_devinfo_create(modem, 0, "atmodem", data->chat);
	sim = ofono_sim_create(modem, vendor(modem), "atmodem", data->chat);
	ofono_voicecall_create(modem, 0, "atmodem", data->chat);

	if (sim && data->have_sim == TRUE) {
		data->have_sim = FALSE;
		ofono_sim_inserted_notify(sim, TRUE);
	}
}

static void wavecom_post_sim(struct ofono_modem *modem)
{
	struct wavecom_data *data = ofono_modem_get_data(modem);

	ofono_error("%p: %s", modem, __func__);

	/* TODO GPRS if we have aux line to the modem */
	/* only called... in case no one has asked to online us */
}

static void wavecom_post_online(struct ofono_modem *modem)
{
	struct ofono_message_waiting *mw;
	struct wavecom_data *data = ofono_modem_get_data(modem);

	ofono_error("%p: %s", modem, __func__);
	ofono_ussd_create(modem, 0, "atmodem", data->chat);
	ofono_call_forwarding_create(modem, 0, "atmodem", data->chat);
	ofono_call_settings_create(modem, 0, "atmodem", data->chat);
	ofono_netreg_create(modem, 0, "atmodem", data->chat);
	ofono_call_meter_create(modem, 0, "atmodem", data->chat);
	ofono_call_barring_create(modem, 0, "atmodem", data->chat);

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

	ofono_phonebook_create(modem, 0, "atmodem", data->chat);
	ofono_sms_create(modem, vendor(modem), "atmodem", data->chat);
}

#if 0
static void cfun_enable(gboolean ok, GAtResult *result, gpointer user_data)
{
	struct ofono_modem *modem = user_data;
	GAtChat *chat = ofono_modem_get_data(modem);

	DBG("ok %d", ok);

	if (!ok) {
		g_at_chat_unref(chat);
		ofono_modem_set_powered(modem, FALSE);
		return;
	}

	ofono_modem_set_powered(modem, TRUE);
}

static void cfun_disable2enable(gboolean ok, GAtResult *result, gpointer user_data)
{
	struct ofono_modem *modem = user_data;
	GAtChat *chat = ofono_modem_get_data(modem);

	DBG("ok %d", ok);

	if (!ok)
		return;

	g_at_chat_send(chat, "AT+CFUN=1", none_prefix,
			cfun_enable, modem, NULL);
}

static void cfun_disable(gboolean ok, GAtResult *result, gpointer user_data)
{
	struct ofono_modem *modem = user_data;
	GAtChat *chat = ofono_modem_get_data(modem);

	DBG("");

	g_at_chat_unref(chat);
	ofono_modem_set_data(modem, NULL);

	if (ok)
		ofono_modem_set_powered(modem, FALSE);
}

static int wavecom_disable(struct ofono_modem *modem)
{
	GAtChat *chat = ofono_modem_get_data(modem);

	DBG("%p", modem);

	g_at_chat_cancel_all(chat);
	g_at_chat_unregister_all(chat);

	g_at_chat_send(chat, "AT+CFUN=0", cfun_prefix,
			cfun_disable, modem, NULL);

	return 0;
}

static void wavecom_pre_sim(struct ofono_modem *modem)
{
	GAtChat *chat = ofono_modem_get_data(modem);

	DBG("%p", modem);

	ofono_devinfo_create(modem, 0, "atmodem", chat);
}

static void wavecom_post_sim(struct ofono_modem *modem)
{
	GAtChat *chat = ofono_modem_get_data(modem);

	DBG("%p", modem);

}
#endif

static struct ofono_modem_driver wavecom_driver = {
	.name		= "wavecom",
	.probe		= wavecom_probe,
	.remove		= wavecom_remove,
	.enable		= wavecom_enable,
	.disable	= wavecom_disable,
	.set_online	= wavecom_set_online,
	.pre_sim	= wavecom_pre_sim,
	.post_sim	= wavecom_post_sim,
	.post_online	= wavecom_post_online,
};

static int wavecom_init(void)
{
	return ofono_modem_driver_register(&wavecom_driver);
}

static void wavecom_exit(void)
{
	ofono_modem_driver_unregister(&wavecom_driver);
}

OFONO_PLUGIN_DEFINE(wavecom, "Wavecom driver", VERSION,
		OFONO_PLUGIN_PRIORITY_DEFAULT, wavecom_init, wavecom_exit)