/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#if defined(UNIX) || defined(MACOSX)
#include <stdio.h>
#include <gtk/gtk.h>
#include <unistd.h>
#include "progressui.h"
#include "readstrings.h"
#include "errors.h"
#include <string.h>

#define TIMER_INTERVAL 100

static float    sProgressVal;  // between 0 and 100
static gboolean sQuit = FALSE;
static gboolean sEnableUI;
static guint    sTimerID;

static GtkWidget *sWin;
static GtkWidget *sLabel;
static GtkWidget *sProgressBar;

static const char *sProgramPath;

static gboolean
UpdateDialog(gpointer /*data*/)
{
    if (sQuit)
    {
        gtk_widget_hide(sWin);
        gtk_main_quit();
    }

    float progress = sProgressVal;

    gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(sProgressBar),
                                  progress / 100.0);

    return TRUE;
}

static gboolean
OnDeleteEvent(GtkWidget * /*widget*/, GdkEvent * /*event*/, gpointer /*user_data*/)
{
    return TRUE;
}

int
InitProgressUI(int *pargc, char ***pargv)
{
    sProgramPath = (*pargv)[0];

    sEnableUI = gtk_init_check(pargc, pargv);
    return 0;
}

int
ShowProgressUI()
{
    if (!sEnableUI)
        return -1;

    // Only show the Progress UI if the process is taking a significant amount of
    // time where a significant amount of time is defined as .5 seconds after
    // ShowProgressUI is called sProgress is less than 70.
    usleep(500000);

    if (sQuit || sProgressVal > 70.0f)
        return 0;

    char ini_path[PATH_MAX];
    snprintf(ini_path, sizeof(ini_path), "%s.ini", sProgramPath);

    StringTable strings;
    if (ReadStrings(ini_path, &strings) != OK)
    {
        strcpy(strings.title, "LibreOffice Updater");
        strcpy(strings.info, "This program is updating your LibreOffice installation.");
    }

    sWin = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    if (!sWin)
        return -1;

    static GdkPixbuf *pixbuf;
    char icon_path[PATH_MAX];
    snprintf(icon_path, sizeof(icon_path), "%s.png", sProgramPath);

    g_signal_connect(G_OBJECT(sWin), "delete_event",
                     G_CALLBACK(OnDeleteEvent), nullptr);

    gtk_window_set_title(GTK_WINDOW(sWin), strings.title);
    gtk_window_set_type_hint(GTK_WINDOW(sWin), GDK_WINDOW_TYPE_HINT_DIALOG);
    gtk_window_set_position(GTK_WINDOW(sWin), GTK_WIN_POS_CENTER_ALWAYS);
    gtk_window_set_resizable(GTK_WINDOW(sWin), FALSE);
    gtk_window_set_decorated(GTK_WINDOW(sWin), TRUE);
    gtk_window_set_deletable(GTK_WINDOW(sWin),FALSE);
    pixbuf = gdk_pixbuf_new_from_file (icon_path, nullptr);
    gtk_window_set_icon(GTK_WINDOW(sWin), pixbuf);
    g_object_unref(pixbuf);

    GtkWidget *vbox = gtk_vbox_new(TRUE, 6);
    sLabel = gtk_label_new(strings.info);
    gtk_misc_set_alignment(GTK_MISC(sLabel), 0.0f, 0.0f);
    sProgressBar = gtk_progress_bar_new();

    gtk_box_pack_start(GTK_BOX(vbox), sLabel, FALSE, FALSE, 0);
    gtk_box_pack_start(GTK_BOX(vbox), sProgressBar, TRUE, TRUE, 0);

    sTimerID = g_timeout_add(TIMER_INTERVAL, UpdateDialog, nullptr);

    gtk_container_set_border_width(GTK_CONTAINER(sWin), 10);
    gtk_container_add(GTK_CONTAINER(sWin), vbox);
    gtk_widget_show_all(sWin);

    gtk_main();
    return 0;
}

// Called on a background thread
void
QuitProgressUI()
{
    sQuit = TRUE;
}

// Called on a background thread
void
UpdateProgressUI(float progress)
{
    sProgressVal = progress;  // 32-bit writes are atomic
}
#endif  // defined(UNIX) || defined(MACOSX)