/*
    Gpredict: Real-time satellite tracking and orbit prediction program

    Copyright (C)  2001-2017  Alexandru Csete, OZ9AEC.
 
    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.
  
    You should have received a copy of the GNU General Public License
    along with this program; if not, visit http://www.fsf.org/
*/
#ifdef HAVE_CONFIG_H
#include <build-config.h>
#endif
#include <glib/gi18n.h>
#include <gtk/gtk.h>

#include "sat-cfg.h"
#include "sat-pass-dialogs.h"
#include "sat-pref-multi-pass.h"


#define Y0          1           /* First row where checkboxes are placed */
#define COLUMNS     2           /* Number of columns in the table */

static GtkWidget *check[MULTI_PASS_COL_NUMBER];
static guint    startflags;
static guint    flags;
static gboolean dirty = FALSE;
static gboolean reset = FALSE;

extern const gchar *MULTI_PASS_COL_HINT[];


/* User pressed cancel. Any changes to config must be cancelled. */
void sat_pref_multi_pass_cancel()
{
    dirty = FALSE;
    reset = FALSE;
}

/* User pressed OK. Any changes should be stored in config. */
void sat_pref_multi_pass_ok()
{
    if (dirty)
    {
        sat_cfg_set_int(SAT_CFG_INT_PRED_MULTI_COL, flags);
        dirty = FALSE;
    }
    else if (reset)
    {
        sat_cfg_reset_int(SAT_CFG_INT_PRED_MULTI_COL);
        reset = FALSE;
    }
}

static void toggle_cb(GtkToggleButton * toggle, gpointer data)
{
    if (gtk_toggle_button_get_active(toggle))
        flags |= (1 << GPOINTER_TO_UINT(data));
    else
        flags &= ~(1 << GPOINTER_TO_UINT(data));

    /* clear dirty flag if we are back where we started */
    dirty = (flags != startflags);
}

/* Reset settings */
static void reset_cb(GtkWidget * button, gpointer data)
{
    guint           i;

    (void)button;
    (void)data;

    /* get defaults */
    flags = sat_cfg_get_int_def(SAT_CFG_INT_PRED_MULTI_COL);

    for (i = 0; i < MULTI_PASS_COL_NUMBER; i++)
    {
        gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check[i]),
                                     flags & (1 << i));
    }

    /* reset flags */
    reset = TRUE;
    dirty = FALSE;
}

static void create_reset_button(GtkBox * vbox)
{
    GtkWidget      *button;
    GtkWidget      *butbox;

    button = gtk_button_new_with_label(_("Reset"));
    g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK(reset_cb), NULL);

    gtk_widget_set_tooltip_text(button,
                                _("Reset settings to the default values."));

    butbox = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);
    gtk_button_box_set_layout(GTK_BUTTON_BOX(butbox), GTK_BUTTONBOX_END);
    gtk_box_pack_end(GTK_BOX(butbox), button, FALSE, TRUE, 10);

    gtk_box_pack_end(vbox, butbox, FALSE, TRUE, 0);
}

GtkWidget      *sat_pref_multi_pass_create()
{
    GtkWidget      *table;
    GtkWidget      *label;
    GtkWidget      *vbox;
    guint           i;

    /* create the table */
    table = gtk_grid_new();
    gtk_grid_set_row_spacing(GTK_GRID(table), 10);
    gtk_grid_set_column_spacing(GTK_GRID(table), 5);

    /* create header */
    label = gtk_label_new(NULL);
    g_object_set(label, "xalign", 0.0, "yalign", 0.5, NULL);
    gtk_label_set_markup(GTK_LABEL(label), _("<b>Visible Columns:</b>"));
    gtk_grid_attach(GTK_GRID(table), label, 0, 0, 2, 1);

    /* get visible column flags */
    flags = sat_cfg_get_int(SAT_CFG_INT_PRED_MULTI_COL);

    for (i = 0; i < MULTI_PASS_COL_NUMBER; i++)
    {
        check[i] = gtk_check_button_new_with_label(MULTI_PASS_COL_HINT[i]);
        gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check[i]),
                                     flags & (1 << i));
        g_signal_connect(check[i], "toggled", G_CALLBACK(toggle_cb),
                         GUINT_TO_POINTER(i));

        gtk_grid_attach(GTK_GRID(table), check[i],
                        i % COLUMNS, Y0 + i / COLUMNS, 1, 1);
    }

    /* create vertical box */
    vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
    gtk_box_set_homogeneous(GTK_BOX(vbox), FALSE);
    gtk_container_set_border_width(GTK_CONTAINER(vbox), 20);
    gtk_box_pack_start(GTK_BOX(vbox), table, TRUE, TRUE, 0);

    /* create RESET button */
    create_reset_button(GTK_BOX(vbox));

    startflags = flags;
    dirty = FALSE;
    reset = FALSE;

    return vbox;
}
