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/*-*- Mode: C; c-basic-offset: 8 -*-*/

/***
    This file is part of SmartKit.

    Copyright 2008 Lennart Poettering

    SmartKit 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 2.1 of the
    License, or (at your option) any later version.

    SmartKit 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 SmartKit. If not, If not, see
    <http://www.gnu.org/licenses/>.
***/

using DBus;
using GLib;
using Gtk;

public class DiskHealth : Gtk.Builder {

        string uifile = "gnome-disk-health.ui";

        public bool create_widgets(string disk_string) {
                try {
                        add_from_file (uifile);
                        Gtk.Widget window = (Gtk.Widget) get_object("DiskHealthDialog");

                        if (!setup_connection(disk_string))
                                return false;

                        if (!fill_in_data())
                                return false;

                        window.show_all();
                        window.destroy += Gtk.main_quit;

                        ((Gtk.Button) get_object("closeButton")).clicked += Gtk.main_quit;

                } catch (GLib.Error e) {
                        stderr.printf("Failed to create main window: %s\n", e.message);
                        return false;
                }

                return true;
        }

        private DBus.Connection connection;
        private dynamic DBus.Object manager;
        private DBus.ObjectPath dbus_path;
        private dynamic DBus.Object disk;

        public bool setup_connection(string disk_string) {
                try {
                        connection = DBus.Bus.get(DBus.BusType.SYSTEM);

                        manager = connection.get_object("net.poettering.SmartKit", "/", "net.poettering.SmartKit.Manager");

                        DBus.ObjectPath p;

                        try {
                                p = manager.getDiskByPath(disk_string);
                        } catch (DBus.Error e) {
                                try {
                                        p = manager.getDiskByUDI(disk_string);
                                } catch (DBus.Error e) {
                                        return false;
                                }
                        }

                        stderr.printf("Using D-Bus path %s\n", p);

                        disk = connection.get_object("net.poettering.SmartKit", p, "net.poettering.SmartKit.Disk");
                } catch (DBus.Error e) {
                        stderr.printf("D-Bus error: %s\n", e.message);
                        return false;
                }

                return true;
        }

        public bool fill_in_data() {

                try {
                        ((Gtk.Label) get_object("pathLabel")).set_label(disk.getPath());
                        ((Gtk.Label) get_object("sizeLabel")).set_label(pretty_size(disk.getSize()));

                        bool b = disk.isIdentifyAvailable();

                        if (b) {
                                ((Gtk.Label) get_object("modelLabel")).set_label(disk.getIdentifyModel());
                                ((Gtk.Label) get_object("serialLabel")).set_label(disk.getIdentifySerial());
                                ((Gtk.Label) get_object("firmwareLabel")).set_label(disk.getIdentifyFirmware());
                        } else {
                                ((Gtk.Label) get_object("modelLabel")).set_label("n/a");
                                ((Gtk.Label) get_object("serialLabel")).set_label("n/a");
                                ((Gtk.Label) get_object("firmwareLabel")).set_label("n/a");
                        }

                        if (b)
                                b = disk.isSmartAvailable();

                        if (b)
                                return fill_in_smart_data();
                        else
                                return fill_in_no_smart_data();

                } catch (DBus.Error e) {
                        stderr.printf("D-Bus error: %s\n", e.message);
                        return false;
                }
        }

        public bool fill_in_no_smart_data() {

                ((Gtk.Label) get_object("smartLabel")).set_markup("Disk health functionality (S.M.A.R.T.) is <b>not</b> available.");
                ((Gtk.Label) get_object("healthLabel")).set_label("");
                ((Gtk.Label) get_object("badSectorsLabel")).set_label("");
                ((Gtk.Label) get_object("temperatureLabel")).set_label("");

                return fill_in_no_self_test_data();
        }

        public bool fill_in_smart_data() {
                try {

                        ((Gtk.Label) get_object("smartLabel")).set_label("Disk health functionality (S.M.A.R.T.) is available.");

                        bool b = disk.checkSmartStatus();

                        if (b)
                                ((Gtk.Label) get_object("healthLabel")).set_label("Disk reports to be healthy.");
                        else
                                ((Gtk.Label) get_object("healthLabel")).set_label("Disk reports that it has already failed or is expected to fail in the next 24h.");

                        bool a = disk.getStartTestAvailable();
                        b = disk.getConveyanceTestAvailable();
                        bool c = disk.getShortAndExtendedTestAvailable();

                        if (a && (b || c))
                                return fill_in_self_test_data();
                        else
                                return fill_in_no_self_test_data();

                } catch (DBus.Error e) {
                        stderr.printf("D-Bus error: %s\n", e.message);
                        return false;
                }
        }

        public bool fill_in_self_test_data() {
                try {
                        bool show_percent = false;
                        string text;

                        string state = disk.getSelfTestExecutionStatus();

                        switch (state) {
                                case "success-or-never":
                                        text = "The previous self-test completed without error or no self-test has ever been run.";
                                        break;
                                case "aborted":
                                        text = "The previous self-test was aborted by the user.";
                                        break;
                                case "interrupted":
                                        text = "The previous self-test was interrupted by the host with a hardware or software reset.";
                                        break;
                                case "fatal":
                                        text = "A fatal error or unknown test error occurred while the device was executing the previous self-test and the device was unable to complete the self-test.";
                                        break;
                                case "error-unknown":
                                        text = "The previous self-test completed having a test element that failed.";
                                        break;
                                case "error-electrical":
                                        text = "The previous self-test completed having the electrical element of the test failed.";
                                        break;
                                case "eror-servo":
                                        text = "The previous self-test completed having the servo (and/or seek) test element of the test failed.";
                                        break;
                                case "error-read":
                                        text = "The previous self-test completed having the read element of the test failed.";
                                        break;
                                case "error-handling":
                                        text = "The previous self-test completed having a test element that failed and the device is suspected of having handling damage.";
                                        break;
                                case "inprogress":
                                        text = "Self-test in progres...";
                                        show_percent = true;
                                        break;

                                default:
                                        text = "Unknown state";
                                        break;
                        }


                        ((Gtk.Label) get_object("selfTestLabel")).set_label(text);

                        if (show_percent) {
                                uint percent = disk.getSelfTestExecutionPercentRemaining();

                                ((Gtk.ProgressBar) get_object("selfTestProgressBar")).set_fraction((double) (100-percent)/100);
                                ((Gtk.ProgressBar) get_object("selfTestProgressBar")).set_text("%u%% remaining".printf(percent));
                        } else
                                ((Gtk.ProgressBar) get_object("selfTestProgressBar")).set_text("n/a");

                        ((Gtk.ProgressBar) get_object("selfTestProgressBar")).set_sensitive(show_percent);

                } catch (DBus.Error e) {
                        stderr.printf("D-Bus error: %s\n", e.message);
                        return false;
                }

                return true;
        }

        public bool fill_in_no_self_test_data() {
                ((Gtk.Label) get_object("selfTestLabel")).set_label("Self-test functionality is not available.");
                ((Gtk.Button) get_object("selfTestButton")).set_sensitive(false);
                ((Gtk.ProgressBar) get_object("selfTestProgressBar")).set_sensitive(false);

                return true;
        }

        public static string pretty_size(uint64 size) {

                if (size >= (uint64)1024*(uint64)1024*(uint64)1024*(uint64)1024)
                        return "%0.1f TiB".printf((double) size/1024/1024/1024/1024);
                else if (size >= (uint64)1024*(uint64)1024*(uint64)1024)
                        return "%0.1f GiB".printf((double) size/1024/1024/1024);
                else if (size >= (uint64)1024*(uint64)1024)
                        return "%0.1f MiB".printf((double) size/1024/1024);
                else if (size >= (uint64)1024)
                        return "%0.1f KiB".printf((double) size/1024);
                else
                        return "%u B".printf((uint) size);
        }


        public static int main (string[] args) {
                Gtk.init(ref args);

                var dh  = new DiskHealth();

                if (dh.create_widgets(args[1]))
                        Gtk.main ();

                return 0;
        }
}