/* gnome-about-me-fingerprint.h
 * Copyright (C) 2008 Bastien Nocera <hadess@hadess.net>
 *
 * 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, 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.
 *
 * 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.
 */

#include "config.h"

#include <stdlib.h>
#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include <dbus/dbus-glib-bindings.h>

#include "um-fingerprint-dialog.h"

#include "fingerprint-strings.h"

/* Retrieve a widget from the UI object */
#define WID(s) GTK_WIDGET (gtk_builder_get_object (dialog, s))

/* Translate fprintd strings */
#define TR(s) dgettext("fprintd", s)

/* This must match the number of images on the 2nd page in the UI file */
#define MAX_ENROLL_STAGES 5

static DBusGProxy *manager = NULL;
static DBusGConnection *connection = NULL;
static gboolean is_disable = FALSE;

enum {
        STATE_NONE,
        STATE_CLAIMED,
        STATE_ENROLLING
};

typedef struct {
        GtkWidget *label1;
        GtkWidget *label2;

        GtkWidget *ass;
        GtkBuilder *dialog;

        DBusGProxy *device;
        gboolean is_swipe;
        int num_enroll_stages;
        int num_stages_done;
        char *name;
        const char *finger;
        gint state;
} EnrollData;

static void create_manager (void)
{
        GError *error = NULL;

        connection = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error);
        if (connection == NULL) {
                g_warning ("Failed to connect to session bus: %s", error->message);
                return;
        }

        manager = dbus_g_proxy_new_for_name (connection,
                                             "net.reactivated.Fprint",
                                             "/net/reactivated/Fprint/Manager",
                                             "net.reactivated.Fprint.Manager");
}

static DBusGProxy *
get_first_device (void)
{
        DBusGProxy *device;
        char *device_str;

        if (!dbus_g_proxy_call (manager, "GetDefaultDevice", NULL, G_TYPE_INVALID,
                                DBUS_TYPE_G_OBJECT_PATH, &device_str, G_TYPE_INVALID)) {
                return NULL;
        }

        device = dbus_g_proxy_new_for_name(connection,
                                           "net.reactivated.Fprint",
                                           device_str,
                                           "net.reactivated.Fprint.Device");

        g_free (device_str);

        return device;
}

static const char *
get_reason_for_error (const char *dbus_error)
{
        if (g_str_equal (dbus_error, "net.reactivated.Fprint.Error.PermissionDenied"))
                return N_("You are not allowed to access the device. Contact your system administrator.");
        if (g_str_equal (dbus_error, "net.reactivated.Fprint.Error.AlreadyInUse"))
                return N_("The device is already in use.");
        if (g_str_equal (dbus_error, "net.reactivated.Fprint.Error.Internal"))
                return N_("An internal error occurred.");

        return NULL;
}

static GtkWidget *
get_error_dialog (const char *title,
                  const char *dbus_error,
                  GtkWindow *parent)
{
        GtkWidget *error_dialog;
        const char *reason;

        if (dbus_error == NULL)
                g_warning ("get_error_dialog called with reason == NULL");

        error_dialog =
                gtk_message_dialog_new (parent,
                                GTK_DIALOG_MODAL,
                                GTK_MESSAGE_ERROR,
                                GTK_BUTTONS_OK,
                                "%s", title);
        reason = get_reason_for_error (dbus_error);
        gtk_message_dialog_format_secondary_text
                (GTK_MESSAGE_DIALOG (error_dialog), "%s", reason ? _(reason) : _(dbus_error));

        gtk_window_set_title (GTK_WINDOW (error_dialog), ""); /* as per HIG */
        gtk_container_set_border_width (GTK_CONTAINER (error_dialog), 5);
        gtk_dialog_set_default_response (GTK_DIALOG (error_dialog),
                                         GTK_RESPONSE_OK);
        gtk_window_set_modal (GTK_WINDOW (error_dialog), TRUE);
        gtk_window_set_position (GTK_WINDOW (error_dialog), GTK_WIN_POS_CENTER_ON_PARENT);

        return error_dialog;
}

gboolean
set_fingerprint_label (GtkWidget *label1,
                       GtkWidget *label2)
{
        char **fingers;
        DBusGProxy *device;
        GError *error = NULL;

        if (manager == NULL) {
                create_manager ();
                if (manager == NULL) {
                        return FALSE;
                }
        }

        device = get_first_device ();
        if (device == NULL)
                return FALSE;

        if (!dbus_g_proxy_call (device, "ListEnrolledFingers", &error, G_TYPE_STRING, "", G_TYPE_INVALID,
                                G_TYPE_STRV, &fingers, G_TYPE_INVALID)) {
                if (dbus_g_error_has_name (error, "net.reactivated.Fprint.Error.NoEnrolledPrints") == FALSE) {
                        g_object_unref (device);
                        return FALSE;
                }
                fingers = NULL;
        }

        if (fingers == NULL || g_strv_length (fingers) == 0) {
                is_disable = FALSE;
                gtk_label_set_text (GTK_LABEL (label1), _("Disabled"));
                gtk_label_set_text (GTK_LABEL (label2), _("Disabled"));
        } else {
                is_disable = TRUE;
                gtk_label_set_text (GTK_LABEL (label1), _("Enabled"));
                gtk_label_set_text (GTK_LABEL (label2), _("Enabled"));
        }

        g_strfreev (fingers);
        g_object_unref (device);

        return TRUE;
}

static void
delete_fingerprints (void)
{
        DBusGProxy *device;

        if (manager == NULL) {
                create_manager ();
                if (manager == NULL)
                        return;
        }

        device = get_first_device ();
        if (device == NULL)
                return;

        dbus_g_proxy_call (device, "DeleteEnrolledFingers", NULL, G_TYPE_STRING, "", G_TYPE_INVALID, G_TYPE_INVALID);

        g_object_unref (device);
}

static void
delete_fingerprints_question (GtkWindow *parent,
                              GtkWidget *label1,
                              GtkWidget *label2,
                              UmUser    *user)
{
        GtkWidget *question;
        GtkWidget *button;

        question = gtk_message_dialog_new (parent,
                                           GTK_DIALOG_MODAL,
                                           GTK_MESSAGE_QUESTION,
                                           GTK_BUTTONS_NONE,
                                           _("Delete registered fingerprints?"));
        gtk_dialog_add_button (GTK_DIALOG (question), GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL);
        gtk_window_set_modal (GTK_WINDOW (question), TRUE);

        button = gtk_button_new_with_mnemonic (_("_Delete Fingerprints"));
        gtk_button_set_image (GTK_BUTTON (button), gtk_image_new_from_stock (GTK_STOCK_DELETE, GTK_ICON_SIZE_BUTTON));
        gtk_widget_set_can_default (button, TRUE);
        gtk_widget_show (button);
        gtk_dialog_add_action_widget (GTK_DIALOG (question), button, GTK_RESPONSE_OK);

        gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (question),
                                                  _("Do you want to delete your registered fingerprints so fingerprint login is disabled?"));
        gtk_container_set_border_width (GTK_CONTAINER (question), 5);
        gtk_dialog_set_default_response (GTK_DIALOG (question), GTK_RESPONSE_OK);
        gtk_window_set_position (GTK_WINDOW (question), GTK_WIN_POS_CENTER_ON_PARENT);
        gtk_window_set_modal (GTK_WINDOW (question), TRUE);

        if (gtk_dialog_run (GTK_DIALOG (question)) == GTK_RESPONSE_OK) {
                delete_fingerprints ();
                set_fingerprint_label (label1, label2);
        }

        gtk_widget_destroy (question);
}

static void
enroll_data_destroy (EnrollData *data)
{
        switch (data->state) {
        case STATE_ENROLLING:
                dbus_g_proxy_call(data->device, "EnrollStop", NULL, G_TYPE_INVALID, G_TYPE_INVALID);
                /* fall-through */
        case STATE_CLAIMED:
                dbus_g_proxy_call(data->device, "Release", NULL, G_TYPE_INVALID, G_TYPE_INVALID);
                /* fall-through */
        case STATE_NONE:
                g_free (data->name);
                g_object_unref (data->device);
                g_object_unref (data->dialog);
                gtk_widget_destroy (data->ass);

                g_free (data);
        }
}

static const char *
selected_finger (GtkBuilder *dialog)
{
        int index;

        if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (WID ("radiobutton1")))) {
                gtk_widget_set_sensitive (WID ("finger_combobox"), FALSE);
                return "right-index-finger";
        }
        if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (WID ("radiobutton2")))) {
                gtk_widget_set_sensitive (WID ("finger_combobox"), FALSE);
                return "left-index-finger";
        }
        gtk_widget_set_sensitive (WID ("finger_combobox"), TRUE);
        index = gtk_combo_box_get_active (GTK_COMBO_BOX (WID ("finger_combobox")));
        switch (index) {
        case 0:
                return "left-thumb";
        case 1:
                return "left-middle-finger";
        case 2:
                return "left-ring-finger";
        case 3:
                return "left-little-finger";
        case 4:
                return "right-thumb";
        case 5:
                return "right-middle-finger";
        case 6:
                return "right-ring-finger";
        case 7:
                return "right-little-finger";
        default:
                g_assert_not_reached ();
        }

        return NULL;
}

static void
finger_radio_button_toggled (GtkToggleButton *button, EnrollData *data)
{
        GtkBuilder *dialog = data->dialog;
        char *msg;

        data->finger = selected_finger (data->dialog);

        msg = g_strdup_printf (TR(finger_str_to_msg (data->finger, data->is_swipe)), data->name);
        gtk_label_set_text (GTK_LABEL (WID("enroll-label")), msg);
        g_free (msg);
}

static void
finger_combobox_changed (GtkComboBox *combobox, EnrollData *data)
{
        GtkBuilder *dialog = data->dialog;
        char *msg;

        data->finger = selected_finger (data->dialog);

        msg = g_strdup_printf (TR(finger_str_to_msg (data->finger, data->is_swipe)), data->name);
        gtk_label_set_text (GTK_LABEL (WID("enroll-label")), msg);
        g_free (msg);
}

static void
assistant_cancelled (GtkAssistant *ass, EnrollData *data)
{
        GtkWidget *label1, *label2;

        label1 = data->label1;
        label2 = data->label2;

        enroll_data_destroy (data);
        set_fingerprint_label (label1, label2);
}

static void
enroll_result (GObject *object, const char *result, gboolean done, EnrollData *data)
{
        GtkBuilder *dialog = data->dialog;
        char *msg;

        if (g_str_equal (result, "enroll-completed") || g_str_equal (result, "enroll-stage-passed")) {
                char *name, *path;

                data->num_stages_done++;
                name = g_strdup_printf ("image%d", data->num_stages_done);
                path = g_build_filename (UM_PIXMAP_DIR, "print_ok.png", NULL);
                gtk_image_set_from_file (GTK_IMAGE (WID (name)), path);
                g_free (name);
                g_free (path);
        }
        if (g_str_equal (result, "enroll-completed")) {
                gtk_label_set_text (GTK_LABEL (WID ("status-label")), _("Done!"));
                gtk_assistant_set_page_complete (GTK_ASSISTANT (data->ass), WID ("page2"), TRUE);
        }

        if (done != FALSE) {
                dbus_g_proxy_call(data->device, "EnrollStop", NULL, G_TYPE_INVALID, G_TYPE_INVALID);
                data->state = STATE_CLAIMED;
                if (g_str_equal (result, "enroll-completed") == FALSE) {
                        /* The enrollment failed, restart it */
                        dbus_g_proxy_call(data->device, "EnrollStart", NULL, G_TYPE_STRING, data->finger, G_TYPE_INVALID, G_TYPE_INVALID);
                        data->state = STATE_ENROLLING;
                        result = "enroll-retry-scan";
                } else {
                        return;
                }
        }

        msg = g_strdup_printf (TR(enroll_result_str_to_msg (result, data->is_swipe)), data->name);
        gtk_label_set_text (GTK_LABEL (WID ("status-label")), msg);
        g_free (msg);
}

static void
assistant_prepare (GtkAssistant *ass, GtkWidget *page, EnrollData *data)
{
        const char *name;

        name = g_object_get_data (G_OBJECT (page), "name");
        if (name == NULL)
                return;

        if (g_str_equal (name, "enroll")) {
                DBusGProxy *p;
                GError *error = NULL;
                GtkBuilder *dialog = data->dialog;
                char *path;
                guint i;
                GValue value = { 0, };

                if (!dbus_g_proxy_call (data->device, "Claim", &error, G_TYPE_STRING, "", G_TYPE_INVALID, G_TYPE_INVALID)) {
                        GtkWidget *d;
                        char *msg;

                        /* translators:
                         * The variable is the name of the device, for example:
                         * "Could you not access "Digital Persona U.are.U 4000/4000B" device */
                        msg = g_strdup_printf (_("Could not access '%s' device"), data->name);
                        d = get_error_dialog (msg, dbus_g_error_get_name (error), GTK_WINDOW (data->ass));
                        g_error_free (error);
                        gtk_dialog_run (GTK_DIALOG (d));
                        gtk_widget_destroy (d);
                        g_free (msg);

                        enroll_data_destroy (data);

                        return;
                }
                data->state = STATE_CLAIMED;

                p = dbus_g_proxy_new_from_proxy (data->device, "org.freedesktop.DBus.Properties", NULL);
                if (!dbus_g_proxy_call (p, "Get", NULL, G_TYPE_STRING, "net.reactivated.Fprint.Device", G_TYPE_STRING, "num-enroll-stages", G_TYPE_INVALID,
                                       G_TYPE_VALUE, &value, G_TYPE_INVALID) || g_value_get_int (&value) < 1) {
                        GtkWidget *d;
                        char *msg;

                        /* translators:
                         * The variable is the name of the device, for example:
                         * "Could you not access "Digital Persona U.are.U 4000/4000B" device */
                        msg = g_strdup_printf (_("Could not access '%s' device"), data->name);
                        d = get_error_dialog (msg, "net.reactivated.Fprint.Error.Internal", GTK_WINDOW (data->ass));
                        gtk_dialog_run (GTK_DIALOG (d));
                        gtk_widget_destroy (d);
                        g_free (msg);

                        enroll_data_destroy (data);

                        g_object_unref (p);
                        return;
                }
                g_object_unref (p);

                data->num_enroll_stages = g_value_get_int (&value);

                /* Hide the extra "bulbs" if not needed */
                for (i = MAX_ENROLL_STAGES; i > data->num_enroll_stages; i--) {
                        char *name;

                        name = g_strdup_printf ("image%d", i);
                        gtk_widget_hide (WID (name));
                        g_free (name);
                }
                /* And set the right image */
                {
                        char *filename;

                        filename = g_strdup_printf ("%s.png", data->finger);
                        path = g_build_filename (UM_PIXMAP_DIR, filename, NULL);
                        g_free (filename);
                }
                for (i = 1; i <= data->num_enroll_stages; i++) {
                        char *name;
                        name = g_strdup_printf ("image%d", i);
                        gtk_image_set_from_file (GTK_IMAGE (WID (name)), path);
                        g_free (name);
                }
                g_free (path);

                dbus_g_proxy_add_signal(data->device, "EnrollStatus", G_TYPE_STRING, G_TYPE_BOOLEAN, NULL);
                dbus_g_proxy_connect_signal(data->device, "EnrollStatus", G_CALLBACK(enroll_result), data, NULL);

                if (!dbus_g_proxy_call(data->device, "EnrollStart", &error, G_TYPE_STRING, data->finger, G_TYPE_INVALID, G_TYPE_INVALID)) {
                        GtkWidget *d;
                        char *msg;

                        /* translators:
                         * The variable is the name of the device, for example:
                         * "Could you not access "Digital Persona U.are.U 4000/4000B" device */
                        msg = g_strdup_printf (_("Could not start finger capture on '%s' device"), data->name);
                        d = get_error_dialog (msg, dbus_g_error_get_name (error), GTK_WINDOW (data->ass));
                        g_error_free (error);
                        gtk_dialog_run (GTK_DIALOG (d));
                        gtk_widget_destroy (d);
                        g_free (msg);

                        enroll_data_destroy (data);

                        return;
                }
                data->state = STATE_ENROLLING;;
        } else {
                if (data->state == STATE_ENROLLING) {
                        dbus_g_proxy_call(data->device, "EnrollStop", NULL, G_TYPE_INVALID, G_TYPE_INVALID);
                        data->state = STATE_CLAIMED;
                }
                if (data->state == STATE_CLAIMED) {
                        dbus_g_proxy_call(data->device, "Release", NULL, G_TYPE_INVALID, G_TYPE_INVALID);
                        data->state = STATE_NONE;
                }
        }
}

static void
align_image (GtkWidget *child, gpointer data)
{
        if (GTK_IS_IMAGE (child)) {
                gtk_misc_set_alignment (GTK_MISC (child), 0, 0.5);
                gtk_misc_set_padding (GTK_MISC (child), 10, 10);
        }

        if (GTK_IS_LABEL (child)) {
                gtk_label_set_use_markup (GTK_LABEL (child), TRUE);
                gtk_widget_override_font (child, NULL);
                gtk_misc_set_padding (GTK_MISC (child), 68, 10);
        }
}

static void
enroll_fingerprints (GtkWindow *parent,
                     GtkWidget *label1,
                     GtkWidget *label2,
                     UmUser    *user)
{
        DBusGProxy *device, *p;
        GHashTable *props;
        GtkBuilder *dialog;
        EnrollData *data;
        GtkWidget *ass;
        const char *filename;
        char *msg;
        GError *error = NULL;
        GdkPixbuf *pixbuf;
        gchar *title;

        device = NULL;

        if (manager == NULL) {
                create_manager ();
                if (manager != NULL)
                        device = get_first_device ();
        } else {
                device = get_first_device ();
        }

        if (manager == NULL || device == NULL) {
                GtkWidget *d;

                d = get_error_dialog (_("Could not access any fingerprint readers"),
                                      _("Please contact your system administrator for help."),
                                      parent);
                gtk_dialog_run (GTK_DIALOG (d));
                gtk_widget_destroy (d);
                return;
        }

        data = g_new0 (EnrollData, 1);
        data->device = device;
        data->label1 = label1;
        data->label2 = label2;

        /* Get some details about the device */
        p = dbus_g_proxy_new_from_proxy (device, "org.freedesktop.DBus.Properties", NULL);
        if (dbus_g_proxy_call (p, "GetAll", NULL, G_TYPE_STRING, "net.reactivated.Fprint.Device", G_TYPE_INVALID,
                               dbus_g_type_get_map ("GHashTable", G_TYPE_STRING, G_TYPE_VALUE), &props, G_TYPE_INVALID)) {
                const char *scan_type;
                data->name = g_value_dup_string (g_hash_table_lookup (props, "name"));
                scan_type = g_value_dup_string (g_hash_table_lookup (props, "scan-type"));
                if (g_str_equal (scan_type, "swipe"))
                        data->is_swipe = TRUE;
                g_hash_table_destroy (props);
        }
        g_object_unref (p);

        dialog = gtk_builder_new ();
        filename = UIDIR "/account-fingerprint.ui";
        if (!g_file_test (filename, G_FILE_TEST_EXISTS))
                filename = "data/account-fingerprint.ui";
        if (!gtk_builder_add_from_file (dialog, filename, &error)) {
                g_error ("%s", error->message);
                g_error_free (error);
                return;
        }
        data->dialog = dialog;

        ass = WID ("assistant");
        gtk_window_set_title (GTK_WINDOW (ass), _("Enable Fingerprint Login"));
        gtk_window_set_transient_for (GTK_WINDOW (ass), parent);
        gtk_window_set_modal (GTK_WINDOW (ass), TRUE);
        gtk_window_set_resizable (GTK_WINDOW (ass), FALSE);
        gtk_window_set_type_hint (GTK_WINDOW (ass), GDK_WINDOW_TYPE_HINT_DIALOG);

        g_signal_connect (G_OBJECT (ass), "cancel",
                          G_CALLBACK (assistant_cancelled), data);
        g_signal_connect (G_OBJECT (ass), "close",
                          G_CALLBACK (assistant_cancelled), data);
        g_signal_connect (G_OBJECT (ass), "prepare",
                          G_CALLBACK (assistant_prepare), data);

        /* Page 1 */
        gtk_combo_box_set_active (GTK_COMBO_BOX (WID ("finger_combobox")), 0);

        g_signal_connect (G_OBJECT (WID ("radiobutton1")), "toggled",
                          G_CALLBACK (finger_radio_button_toggled), data);
        g_signal_connect (G_OBJECT (WID ("radiobutton2")), "toggled",
                          G_CALLBACK (finger_radio_button_toggled), data);
        g_signal_connect (G_OBJECT (WID ("radiobutton3")), "toggled",
                          G_CALLBACK (finger_radio_button_toggled), data);
        g_signal_connect (G_OBJECT (WID ("finger_combobox")), "changed",
                          G_CALLBACK (finger_combobox_changed), data);

        data->finger = selected_finger (dialog);

        g_object_set_data (G_OBJECT (WID("page1")), "name", "intro");

        /* translators:
         * The variable is the name of the device, for example:
         * "To enable fingerprint login, you need to save one of your fingerprints, using the
         * 'Digital Persona U.are.U 4000/4000B' device."
         */
        msg = g_strdup_printf (_("To enable fingerprint login, you need to save one of your fingerprints, using the '%s' device."),
                               data->name);
        gtk_label_set_text (GTK_LABEL (WID("intro-label")), msg);
        g_free (msg);

        gtk_assistant_set_page_complete (GTK_ASSISTANT (ass), WID("page1"), TRUE);

        pixbuf = um_user_render_icon (user, FALSE, 48);
        title = g_strdup_printf (_("Enrolling fingerprints for\n<b><big>%s</big></b>"), um_user_get_real_name (user));

        gtk_assistant_set_page_header_image (GTK_ASSISTANT (ass), WID("page1"), pixbuf);
        gtk_assistant_set_page_title (GTK_ASSISTANT (ass), WID("page1"), title);
        gtk_assistant_set_page_header_image (GTK_ASSISTANT (ass), WID("page2"), pixbuf);
        gtk_assistant_set_page_title (GTK_ASSISTANT (ass), WID("page2"), title);
        gtk_assistant_set_page_header_image (GTK_ASSISTANT (ass), WID("page3"), pixbuf);
        gtk_assistant_set_page_title (GTK_ASSISTANT (ass), WID("page3"), title);
        gtk_container_forall (GTK_CONTAINER (ass), align_image, NULL);
        g_object_unref (pixbuf);
        g_free (title);

        /* Page 2 */
        g_object_set_data (G_OBJECT (WID("page2")), "name", "enroll");

        msg = g_strdup_printf (TR(finger_str_to_msg (data->finger, data->is_swipe)), data->name);
        gtk_label_set_text (GTK_LABEL (WID("enroll-label")), msg);
        g_free (msg);

        /* Page 3 */
        g_object_set_data (G_OBJECT (WID("page3")), "name", "summary");

        data->ass = ass;
        gtk_widget_show_all (ass);
}

void
fingerprint_button_clicked (GtkWindow *parent,
                            GtkWidget *label1,
                            GtkWidget *label2,
                            UmUser    *user)
{
        bindtextdomain ("fprintd", GNOMELOCALEDIR);
        bind_textdomain_codeset ("fprintd", "UTF-8");

        if (is_disable != FALSE) {
                delete_fingerprints_question (parent, label1, label2, user);
        } else {
                enroll_fingerprints (parent, label1, label2, user);
        }
}

