/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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:
 *
 * Copyright (C) 2008 - 2009 Novell, Inc.
 * Copyright (C) 2009 - 2010 Red Hat, Inc.
 */

#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "mm-modem-sierra-gsm.h"
#include "mm-errors.h"
#include "mm-callback-info.h"
#include "mm-modem-helpers.h"

static void modem_init (MMModem *modem_class);

G_DEFINE_TYPE_EXTENDED (MMModemSierraGsm, mm_modem_sierra_gsm, MM_TYPE_GENERIC_GSM, 0,
                        G_IMPLEMENT_INTERFACE (MM_TYPE_MODEM, modem_init))

#define MM_MODEM_SIERRA_GSM_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), MM_TYPE_MODEM_SIERRA_GSM, MMModemSierraGsmPrivate))

typedef struct {
    guint enable_wait_id;
} MMModemSierraGsmPrivate;

MMModem *
mm_modem_sierra_gsm_new (const char *device,
                         const char *driver,
                         const char *plugin)
{
    g_return_val_if_fail (device != NULL, NULL);
    g_return_val_if_fail (driver != NULL, NULL);
    g_return_val_if_fail (plugin != NULL, NULL);

    return MM_MODEM (g_object_new (MM_TYPE_MODEM_SIERRA_GSM,
                                   MM_MODEM_MASTER_DEVICE, device,
                                   MM_MODEM_DRIVER, driver,
                                   MM_MODEM_PLUGIN, plugin,
                                   NULL));
}

/*****************************************************************************/

static void
get_allowed_mode_done (MMAtSerialPort *port,
                       GString *response,
                       GError *error,
                       gpointer user_data)
{
    MMCallbackInfo *info = (MMCallbackInfo *) user_data;
    GRegex *r = NULL;
    GMatchInfo *match_info;

    info->error = mm_modem_check_removed (info->modem, error);
    if (info->error)
        goto done;

    /* Example response: !SELRAT: 03, UMTS 3G Preferred */
    r = g_regex_new ("!SELRAT:\\s*(\\d+).*$", 0, 0, NULL);
    if (!r) {
        info->error = g_error_new_literal (MM_MODEM_ERROR,
                                           MM_MODEM_ERROR_GENERAL,
                                           "Failed to parse the allowed mode response");
        goto done;
    }

    if (g_regex_match_full (r, response->str, response->len, 0, 0, &match_info, &info->error)) {
        MMModemGsmAllowedMode mode = MM_MODEM_GSM_ALLOWED_MODE_ANY;
        char *str;

        str = g_match_info_fetch (match_info, 1);
        switch (atoi (str)) {
        case 0:
            mode = MM_MODEM_GSM_ALLOWED_MODE_ANY;
            break;
        case 1:
            mode = MM_MODEM_GSM_ALLOWED_MODE_3G_ONLY;
            break;
        case 2:
            mode = MM_MODEM_GSM_ALLOWED_MODE_2G_ONLY;
            break;
        case 3:
            mode = MM_MODEM_GSM_ALLOWED_MODE_3G_PREFERRED;
            break;
        case 4:
            mode = MM_MODEM_GSM_ALLOWED_MODE_2G_PREFERRED;
            break;
        default:
            info->error = g_error_new (MM_MODEM_ERROR,
                                       MM_MODEM_ERROR_GENERAL,
                                       "Failed to parse the allowed mode response: '%s'",
                                       response->str);
            break;
        }
        g_free (str);

        mm_callback_info_set_result (info, GUINT_TO_POINTER (mode), NULL);
    }

done:
    if (r)
        g_regex_unref (r);
    mm_callback_info_schedule (info);
}

static void
get_allowed_mode (MMGenericGsm *gsm,
                  MMModemUIntFn callback,
                  gpointer user_data)
{
    MMCallbackInfo *info;
    MMAtSerialPort *primary;

    info = mm_callback_info_uint_new (MM_MODEM (gsm), callback, user_data);

    /* Sierra secondary ports don't have full AT command interpreters */
    primary = mm_generic_gsm_get_at_port (gsm, MM_PORT_TYPE_PRIMARY);
    if (!primary || mm_port_get_connected (MM_PORT (primary))) {
        g_set_error_literal (&info->error, MM_MODEM_ERROR, MM_MODEM_ERROR_CONNECTED,
                             "Cannot perform this operation while connected");
        mm_callback_info_schedule (info);
        return;
    }

    mm_at_serial_port_queue_command (primary, "!SELRAT?", 3, get_allowed_mode_done, info);
}

static void
set_allowed_mode_done (MMAtSerialPort *port,
                       GString *response,
                       GError *error,
                       gpointer user_data)
{
    MMCallbackInfo *info = (MMCallbackInfo *) user_data;

    if (error)
        info->error = g_error_copy (error);

   mm_callback_info_schedule (info);
}

static void
set_allowed_mode (MMGenericGsm *gsm,
                  MMModemGsmAllowedMode mode,
                  MMModemFn callback,
                  gpointer user_data)
{
    MMCallbackInfo *info;
    MMAtSerialPort *primary;
    char *command;
    int idx = 0;

    info = mm_callback_info_new (MM_MODEM (gsm), callback, user_data);

    /* Sierra secondary ports don't have full AT command interpreters */
    primary = mm_generic_gsm_get_at_port (gsm, MM_PORT_TYPE_PRIMARY);
    if (!primary || mm_port_get_connected (MM_PORT (primary))) {
        g_set_error_literal (&info->error, MM_MODEM_ERROR, MM_MODEM_ERROR_CONNECTED,
                             "Cannot perform this operation while connected");
        mm_callback_info_schedule (info);
        return;
    }

    switch (mode) {
    case MM_MODEM_GSM_ALLOWED_MODE_2G_ONLY:
        idx = 2;
        break;
    case MM_MODEM_GSM_ALLOWED_MODE_3G_ONLY:
        idx = 1;
        break;
    case MM_MODEM_GSM_ALLOWED_MODE_2G_PREFERRED:
        idx = 4;
        break;
    case MM_MODEM_GSM_ALLOWED_MODE_3G_PREFERRED:
        idx = 3;
        break;
    case MM_MODEM_GSM_ALLOWED_MODE_ANY:
    default:
        break;
    }

    command = g_strdup_printf ("!SELRAT=%d", idx);
    mm_at_serial_port_queue_command (primary, command, 3, set_allowed_mode_done, info);
    g_free (command);
}

static void
get_act_request_done (MMAtSerialPort *port,
                      GString *response,
                      GError *error,
                      gpointer user_data)
{
    MMCallbackInfo *info = user_data;
    MMModemGsmAccessTech act = MM_MODEM_GSM_ACCESS_TECH_UNKNOWN;
    const char *p;

    if (error)
        info->error = g_error_copy (error);
    else {
        p = mm_strip_tag (response->str, "*CNTI:");
        p = strchr (p, ',');
        if (p)
            act = mm_gsm_string_to_access_tech (p + 1);
    }

    mm_callback_info_set_result (info, GUINT_TO_POINTER (act), NULL);
    mm_callback_info_schedule (info);
}

static void
get_access_technology (MMGenericGsm *modem,
                       MMModemUIntFn callback,
                       gpointer user_data)
{
    MMAtSerialPort *port;
    MMCallbackInfo *info;

    info = mm_callback_info_uint_new (MM_MODEM (modem), callback, user_data);

    port = mm_generic_gsm_get_best_at_port (modem, &info->error);
    if (!port) {
        mm_callback_info_schedule (info);
        return;
    }

    mm_at_serial_port_queue_command (port, "*CNTI=0", 3, get_act_request_done, info);
}

/*****************************************************************************/
/*    Modem class override functions                                         */
/*****************************************************************************/

static gboolean
sierra_enabled (gpointer user_data)
{
    MMCallbackInfo *info = user_data;
    MMGenericGsm *modem;
    MMModemSierraGsmPrivate *priv;

    /* Make sure we don't use an invalid modem that may have been removed */
    if (info->modem) {
        modem = MM_GENERIC_GSM (info->modem);
        priv = MM_MODEM_SIERRA_GSM_GET_PRIVATE (modem);
        priv->enable_wait_id = 0;
        MM_GENERIC_GSM_CLASS (mm_modem_sierra_gsm_parent_class)->do_enable_power_up_done (modem, NULL, NULL, info);
    }
    return FALSE;
}

static void
real_do_enable_power_up_done (MMGenericGsm *gsm,
                              GString *response,
                              GError *error,
                              MMCallbackInfo *info)
{
    MMModemSierraGsmPrivate *priv = MM_MODEM_SIERRA_GSM_GET_PRIVATE (gsm);

    if (error) {
        /* Chain up to parent */
        MM_GENERIC_GSM_CLASS (mm_modem_sierra_gsm_parent_class)->do_enable_power_up_done (gsm, NULL, error, info);
        return;
    }

    /* Some Sierra devices return OK on +CFUN=1 right away but need some time
     * to finish initialization.
     */
    g_warn_if_fail (priv->enable_wait_id == 0);
    priv->enable_wait_id = g_timeout_add_seconds (10, sierra_enabled, info);
}

static gboolean
grab_port (MMModem *modem,
           const char *subsys,
           const char *name,
           MMPortType suggested_type,
           gpointer user_data,
           GError **error)
{
    MMGenericGsm *gsm = MM_GENERIC_GSM (modem);
    MMPortType ptype = MM_PORT_TYPE_IGNORED;
    MMPort *port;

    if (suggested_type == MM_PORT_TYPE_UNKNOWN) {
        if (!mm_generic_gsm_get_at_port (gsm, MM_PORT_TYPE_PRIMARY))
                ptype = MM_PORT_TYPE_PRIMARY;
        else if (!mm_generic_gsm_get_at_port (gsm, MM_PORT_TYPE_SECONDARY))
            ptype = MM_PORT_TYPE_SECONDARY;
    } else
        ptype = suggested_type;

    port = mm_generic_gsm_grab_port (gsm, subsys, name, ptype, error);

    if (port && MM_IS_AT_SERIAL_PORT (port)) {
        GRegex *regex;

        g_object_set (G_OBJECT (port), MM_PORT_CARRIER_DETECT, FALSE, NULL);

        regex = g_regex_new ("\\r\\n\\+PACSP0\\r\\n", G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
        mm_at_serial_port_add_unsolicited_msg_handler (MM_AT_SERIAL_PORT (port), regex, NULL, NULL, NULL);
        g_regex_unref (regex);
    }

    return !!port;
}

/*****************************************************************************/

static void
modem_init (MMModem *modem_class)
{
    modem_class->grab_port = grab_port;
}

static void
mm_modem_sierra_gsm_init (MMModemSierraGsm *self)
{
}

static void
dispose (GObject *object)
{
    MMModemSierraGsmPrivate *priv = MM_MODEM_SIERRA_GSM_GET_PRIVATE (object);

    if (priv->enable_wait_id)
        g_source_remove (priv->enable_wait_id);
}

static void
mm_modem_sierra_gsm_class_init (MMModemSierraGsmClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    MMGenericGsmClass *gsm_class = MM_GENERIC_GSM_CLASS (klass);

    mm_modem_sierra_gsm_parent_class = g_type_class_peek_parent (klass);
    g_type_class_add_private (object_class, sizeof (MMModemSierraGsmPrivate));

    object_class->dispose = dispose;
    gsm_class->do_enable_power_up_done = real_do_enable_power_up_done;
    gsm_class->set_allowed_mode = set_allowed_mode;
    gsm_class->get_allowed_mode = get_allowed_mode;
    gsm_class->get_access_technology = get_access_technology;
}