/*
 * This file Copyright (C) Mnemosyne LLC
 *
 * This file is licensed by the GPL version 2. Works owned by the
 * Transmission project are granted a special exemption to clause 2 (b)
 * so that the bulk of its code can remain under the MIT license.
 * This exemption does not extend to derived works not owned by
 * the Transmission project.
 *
 * $Id$
 */

#include <libtransmission/transmission.h>

#include <glib/gi18n.h>
#include <gtk/gtk.h>

#include "conf.h" /* gtr_pref_string_get */
#include "hig.h"
#include "relocate.h"
#include "util.h"

#define DATA_KEY "gtr-relocate-data"

static char * previousLocation = NULL;

struct relocate_dialog_data
{
    int done;
    bool do_move;
    TrCore * core;
    GSList * torrent_ids;
    GtkWidget * message_dialog;
    GtkWidget * chooser_dialog;
};

static void
data_free (gpointer gdata)
{
    struct relocate_dialog_data * data = gdata;
    g_slist_free (data->torrent_ids);
    g_free (data);
}

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

static void
startMovingNextTorrent (struct relocate_dialog_data * data)
{
    char * str;
    const int id = GPOINTER_TO_INT (data->torrent_ids->data);

    tr_torrent * tor = gtr_core_find_torrent (data->core, id);
    if (tor != NULL)
        tr_torrentSetLocation (tor, previousLocation, data->do_move, NULL, &data->done);

    data->torrent_ids = g_slist_delete_link (data->torrent_ids,
                                             data->torrent_ids);

    str = g_strdup_printf (_("Moving \"%s\""), tr_torrentName (tor));
    gtk_message_dialog_set_markup (GTK_MESSAGE_DIALOG (data->message_dialog), str);
    g_free (str);
}

/* every once in awhile, check to see if the move is done.
 * if so, delete the dialog */
static gboolean
onTimer (gpointer gdata)
{
    struct relocate_dialog_data * data = gdata;
    const int done = data->done;

    if (done == TR_LOC_ERROR)
    {
        const int flags = GTK_DIALOG_MODAL
                        | GTK_DIALOG_DESTROY_WITH_PARENT;
        GtkWidget * w = gtk_message_dialog_new (GTK_WINDOW (data->message_dialog),
                                                flags,
                                                GTK_MESSAGE_ERROR,
                                                GTK_BUTTONS_CLOSE,
                                                "%s",
                                                _("Couldn't move torrent"));
        gtk_dialog_run (GTK_DIALOG (w));
        gtk_widget_destroy (GTK_WIDGET (data->message_dialog));
        return FALSE;
    }
    else if (done == TR_LOC_DONE)
    {
        if (data->torrent_ids != NULL)
        {
            startMovingNextTorrent (data);
        }
        else
        {
            gtk_widget_destroy (GTK_WIDGET (data->chooser_dialog));
            return FALSE;
        }
    }

    return TRUE; /* keep looping */
}

static void
onResponse (GtkDialog * dialog, int response, gpointer unused UNUSED)
{
    if (response == GTK_RESPONSE_APPLY)
    {
        GtkWidget * w;
        GObject * d = G_OBJECT (dialog);
        struct relocate_dialog_data * data = g_object_get_data (d, DATA_KEY);
        GtkFileChooser * chooser = g_object_get_data (d, "chooser");
        GtkToggleButton * move_tb = g_object_get_data (d, "move_rb");
        char * location = gtk_file_chooser_get_filename (chooser);

        data->do_move = gtk_toggle_button_get_active (move_tb);

        /* pop up a dialog saying that the work is in progress */
        w = gtk_message_dialog_new (GTK_WINDOW (dialog),
                                    GTK_DIALOG_DESTROY_WITH_PARENT | GTK_DIALOG_MODAL,
                                    GTK_MESSAGE_INFO,
                                    GTK_BUTTONS_CLOSE,
                                    NULL);
        gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (w), _("This may take a moment…"));
        gtk_dialog_set_response_sensitive (GTK_DIALOG (w), GTK_RESPONSE_CLOSE, FALSE);
        gtk_widget_show (w);

        /* remember this location so that it can be the default next time */
        g_free (previousLocation);
        previousLocation = location;

        /* start the move and periodically check its status */
        data->message_dialog = w;
        data->done = TR_LOC_DONE;
        onTimer (data);
        gdk_threads_add_timeout_seconds (1, onTimer, data);
    }
    else
    {
        gtk_widget_destroy (GTK_WIDGET (dialog));
    }
}

GtkWidget*
gtr_relocate_dialog_new (GtkWindow * parent,
                         TrCore    * core,
                         GSList    * torrent_ids)
{
    guint row;
    GtkWidget * w;
    GtkWidget * d;
    GtkWidget * t;
    struct relocate_dialog_data * data;

    d = gtk_dialog_new_with_buttons (_("Set Torrent Location"), parent,
                                     GTK_DIALOG_DESTROY_WITH_PARENT |
                                     GTK_DIALOG_MODAL,
                                     GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                                     GTK_STOCK_APPLY, GTK_RESPONSE_APPLY,
                                     NULL);
    gtk_dialog_set_default_response (GTK_DIALOG (d),
                                     GTK_RESPONSE_CANCEL);
    gtk_dialog_set_alternative_button_order (GTK_DIALOG (d),
                                             GTK_RESPONSE_APPLY,
                                             GTK_RESPONSE_CANCEL,
                                             -1);
    g_signal_connect (d, "response", G_CALLBACK (onResponse), NULL);

    row = 0;
    t = hig_workarea_create ();
    hig_workarea_add_section_title (t, &row, _("Location"));

    if (previousLocation == NULL)
        previousLocation = g_strdup (gtr_pref_string_get (TR_PREFS_KEY_DOWNLOAD_DIR));
    w = gtk_file_chooser_button_new (_("Set Torrent Location"), GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER);
    gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (w), previousLocation);
    g_object_set_data (G_OBJECT (d), "chooser", w);
    hig_workarea_add_row (t, &row, _("Torrent _location:"), w, NULL);
    w = gtk_radio_button_new_with_mnemonic (NULL, _("_Move from the current folder"));
    g_object_set_data (G_OBJECT (d), "move_rb", w);
    hig_workarea_add_wide_control (t, &row, w);
    w = gtk_radio_button_new_with_mnemonic_from_widget (GTK_RADIO_BUTTON (w), _("Local data is _already there"));
    hig_workarea_add_wide_control (t, &row, w);
    gtr_dialog_set_content (GTK_DIALOG (d), t);

    data = g_new0 (struct relocate_dialog_data, 1);
    data->core = core;
    data->torrent_ids = torrent_ids;
    data->chooser_dialog = d;
    g_object_set_data_full (G_OBJECT (d), DATA_KEY, data, data_free);

    return d;
}