/**

 * $Id$

 *

 * Core GTK-based user interface

 *

 * Copyright (c) 2005 Nathan Keynes.

 *

 * 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.

 */

#include <time.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/time.h>

#include <gtk/gtkversion.h>

#include "lxdream.h"

#include "dreamcast.h"

#include "dream.h"

#include "display.h"

#include "gdrom/gdrom.h"

#include "gtkui/gtkui.h"

void gtk_gui_start( void );

void gtk_gui_stop( void );

void gtk_gui_alloc_resources ( void );

uint32_t gtk_gui_run_slice( uint32_t nanosecs );

struct dreamcast_module gtk_gui_module = { "gui", NULL,

        gtk_gui_update, 

        gtk_gui_start, 

        gtk_gui_run_slice, 

        gtk_gui_stop, 

        NULL, NULL };

/**

 * Single-instance windows (at most one)

 */

static main_window_t main_win = NULL;

static debug_window_t debug_win = NULL;

static mmio_window_t mmio_win = NULL;

/**

 * UIManager and action helpers

 */

static GtkUIManager *global_ui_manager;

static GtkActionGroup *global_action_group;

/**

 * Count of running nanoseconds - used to cut back on the GUI runtime

 */

static uint32_t gtk_gui_nanos = 0;

static uint32_t gtk_gui_ticks = 0;

static struct timeval gtk_gui_lasttv;

static gboolean gtk_gui_init_ok = FALSE;

#define ENABLE_ACTION(win,name) SET_ACTION_ENABLED(win,name,TRUE)

#define DISABLE_ACTION(win,name) SET_ACTION_ENABLED(win,name,FALSE)

// UI Actions

static const GtkActionEntry ui_actions[] = {

        { "FileMenu", NULL, N_("_File") },

        { "SettingsMenu", NULL, N_("_Settings") },

        { "HelpMenu", NULL, N_("_Help") },

        { "LoadBinary", NULL, N_("Load _Binary..."), NULL, N_("Load and run a program binary"), G_CALLBACK(load_binary_action_callback) },

        { "Reset", GTK_STOCK_REFRESH, N_("_Reset"), "<control>R", N_("Reset dreamcast"), G_CALLBACK(reset_action_callback) },

        { "Pause", GTK_STOCK_MEDIA_PAUSE, N_("_Pause"), NULL, N_("Pause dreamcast"), G_CALLBACK(pause_action_callback) },

        { "Run", GTK_STOCK_MEDIA_PLAY, N_("Resume"), NULL, N_("Resume"), G_CALLBACK(resume_action_callback) },

        { "LoadState", GTK_STOCK_REVERT_TO_SAVED, N_("_Load State..."), "F4", N_("Load an lxdream save state"), G_CALLBACK(load_state_action_callback) },

        { "SaveState", GTK_STOCK_SAVE_AS, N_("_Save State..."), "F3", N_("Create an lxdream save state"), G_CALLBACK(save_state_action_callback) },

        { "Exit", GTK_STOCK_QUIT, N_("E_xit"), NULL, N_("Exit lxdream"), G_CALLBACK(exit_action_callback) },

        { "GdromSettings", NULL, N_("_GD-Rom") },

        { "GdromUnmount", NULL, N_("_Empty") },

        { "GdromMount", GTK_STOCK_CDROM, N_("_Open Image..."), "<control>O", N_("Mount a cdrom disc"), G_CALLBACK(mount_action_callback) },

        { "PathSettings", NULL, N_("_Paths..."), NULL, N_("Configure files and paths"), G_CALLBACK(path_settings_callback) }, 

        { "AudioSettings", NULL, N_("_Audio..."), NULL, N_("Configure audio output"), G_CALLBACK(audio_settings_callback) },

        { "ControllerSettings", NULL, N_("_Controllers..."), NULL, N_("Configure controllers"), G_CALLBACK(maple_settings_callback) },

        { "NetworkSettings", NULL, N_("_Network..."), NULL, N_("Configure network settings"), G_CALLBACK(network_settings_callback) },

        { "VideoSettings", NULL, N_("_Video..."), NULL,N_( "Configure video output"), G_CALLBACK(video_settings_callback) },

        { "HotkeySettings", NULL, N_("_Hotkeys..."), NULL,N_( "Configure hotkeys"), G_CALLBACK(hotkey_settings_callback) },

        { "About", GTK_STOCK_ABOUT, N_("_About..."), NULL, N_("About lxdream"), G_CALLBACK(about_action_callback) },

        { "DebugMenu", NULL, N_("_Debug") },

        { "Debugger", NULL, N_("_Debugger"), NULL, N_("Open debugger window"), G_CALLBACK(debugger_action_callback) },

        { "DebugMem", NULL, N_("View _Memory"), NULL, N_("View memory dump"), G_CALLBACK(debug_memory_action_callback) },

        { "DebugMmio", NULL, N_("View IO _Registers"), NULL, N_("View MMIO Registers"), G_CALLBACK(debug_mmio_action_callback) },

        { "SaveScene", NULL, N_("_Save Scene"), NULL, N_("Save next rendered scene"), G_CALLBACK(save_scene_action_callback) },

        { "SingleStep", GTK_STOCK_REDO, N_("_Single Step"), NULL, N_("Single step"), G_CALLBACK(debug_step_action_callback) },

        { "RunTo", GTK_STOCK_GOTO_LAST, N_("Run _To"), NULL, N_("Run to"), G_CALLBACK( debug_runto_action_callback) },

        { "SetBreakpoint", GTK_STOCK_CLOSE, N_("_Breakpoint"), NULL, N_("Toggle breakpoint"), G_CALLBACK( debug_breakpoint_action_callback) }

};

static const GtkToggleActionEntry ui_toggle_actions[] = {

        { "FullScreen", NULL, "_Full Screen", "<alt>Return", "Toggle full screen video", G_CALLBACK(fullscreen_toggle_callback), 0 },

};

// Menus and toolbars

static const char *ui_description =

    "<ui>"

    " <menubar name='MainMenu'>"

    "  <menu action='FileMenu'>"

    "   <menuitem action='LoadBinary'/>"

    "   <menuitem action='GdromSettings'/>"

    "   <separator/>"

    "   <menuitem action='Reset'/>"

    "   <menuitem action='Pause'/>"

    "   <menuitem action='Run'/>"

    "   <menuitem action='Debugger'/>"

    "   <separator/>"

    "   <menuitem action='LoadState'/>"

    "   <menuitem action='SaveState'/>"

    "   <separator/>"

    "   <menuitem action='Exit'/>"

    "  </menu>"

    "  <menu action='SettingsMenu'>"

    "   <menuitem action='PathSettings'/>"

    "   <menuitem action='AudioSettings'/>"

    "   <menuitem action='ControllerSettings'/>"

    "   <menuitem action='NetworkSettings'/>"

    "   <menuitem action='VideoSettings'/>"

    "   <menuitem action='HotkeySettings'/>"

    "   <separator/>"

    "   <menuitem action='FullScreen'/>"

    "  </menu>"

    "  <menu action='HelpMenu'>"

    "   <menuitem action='About'/>"

    "  </menu>"

    " </menubar>"

    " <toolbar name='MainToolbar'>"

    "  <toolitem action='GdromMount'/>"

    "  <toolitem action='Reset'/>"

    "  <toolitem action='Pause'/>"

    "  <toolitem action='Run'/>"

    "  <separator/>"

    "  <toolitem action='LoadState'/>"

    "  <toolitem action='SaveState'/>"

    " </toolbar>"

    " <menubar name='DebugMenu'>"

    "  <menu action='FileMenu'>"

    "   <menuitem action='GdromSettings'/>"

    "   <separator/>"

    "   <menuitem action='Reset'/>"

    "   <separator/>"

    "   <menuitem action='LoadState'/>"

    "   <menuitem action='SaveState'/>"

    "   <separator/>"

    "   <menuitem action='Exit'/>"

    "  </menu>"

    "  <menu action='DebugMenu'>"

    "   <menuitem action='DebugMem'/>"

    "   <menuitem action='DebugMmio'/>"

    "   <menuitem action='SaveScene'/>"

    "   <separator/>"

    "   <menuitem action='SetBreakpoint'/>"

    "   <menuitem action='Pause'/>"

    "   <menuitem action='SingleStep'/>"

    "   <menuitem action='RunTo'/>"

    "   <menuitem action='Run'/>"

    "  </menu>"

    "  <menu action='SettingsMenu'>"

    "   <menuitem action='PathSettings'/>"

    "   <menuitem action='AudioSettings'/>"

    "   <menuitem action='ControllerSettings'/>"

    "   <menuitem action='NetworkSettings'/>"

    "   <menuitem action='VideoSettings'/>"

    "   <menuitem action='HotkeySettings'/>"

    "   <separator/>"

    "   <menuitem action='FullScreen'/>"

    "  </menu>"

    "  <menu action='HelpMenu'>"

    "   <menuitem action='About'/>"

    "  </menu>"

    " </menubar>"

    " <toolbar name='DebugToolbar'>"

    "  <toolitem action='GdromMount'/>"

    "  <toolitem action='Reset'/>"

    "  <toolitem action='Pause'/>"

    "  <separator/>"

    "  <toolitem action='SingleStep'/>"

    "  <toolitem action='RunTo'/>"

    "  <toolitem action='Run'/>"

    "  <toolitem action='SetBreakpoint'/>"

    "  <separator/>"

    "  <toolitem action='LoadState'/>"

    "  <toolitem action='SaveState'/>"

    " </toolbar>"

    "</ui>";

gboolean gui_parse_cmdline( int *argc, char **argv[] )

{

    gtk_gui_init_ok = gtk_init_check( argc, argv );

    return gtk_gui_init_ok;

}

gboolean gtk_gui_disc_changed( gdrom_disc_t disc, const gchar *disc_name, void *ptr )

{

    main_window_update_title( main_win );

    return TRUE;

}

gboolean gui_init( gboolean withDebug, gboolean withFullscreen )

{

    if( gtk_gui_init_ok ) {

        GError *error = NULL;

        dreamcast_register_module( &gtk_gui_module );

        gtk_gui_alloc_resources();

        global_action_group = gtk_action_group_new("MenuActions");

        gtk_action_group_set_translation_domain( global_action_group, NULL );

        gtk_action_group_add_actions( global_action_group, ui_actions, G_N_ELEMENTS(ui_actions), NULL );

        gtk_action_group_add_toggle_actions( global_action_group, ui_toggle_actions, G_N_ELEMENTS(ui_toggle_actions), NULL );

        gtk_gui_enable_action("AudioSettings", FALSE);

        gtk_gui_enable_action("NetworkSettings", FALSE);

        gtk_gui_enable_action("VideoSettings", FALSE);

        global_ui_manager = gtk_ui_manager_new();

        gtk_ui_manager_set_add_tearoffs(global_ui_manager, TRUE);

        gtk_ui_manager_insert_action_group( global_ui_manager, global_action_group, 0 );

        if (!gtk_ui_manager_add_ui_from_string (global_ui_manager, ui_description, -1, &error)) {

            g_message ("building menus failed: %s", error->message);

            g_error_free (error);

            exit(1);

        }

        GtkAccelGroup *accel_group = gtk_ui_manager_get_accel_group (global_ui_manager);

        GtkWidget *menubar = gtk_ui_manager_get_widget(global_ui_manager, "/MainMenu");

        GtkWidget *toolbar = gtk_ui_manager_get_widget(global_ui_manager, "/MainToolbar");

        GtkWidget *gdrommenuitem = gtk_ui_manager_get_widget(global_ui_manager, "/MainMenu/FileMenu/GdromSettings");

        GtkWidget *gdrommenu = gdrom_menu_new();

        gtk_menu_item_set_submenu( GTK_MENU_ITEM(gdrommenuitem), gdrommenu );

        main_win = main_window_new( lxdream_package_name, menubar, toolbar, accel_group  );

        if( withDebug ) {

            gtk_gui_show_debugger();

        }

        if (withFullscreen) {

            main_window_set_fullscreen(main_win, TRUE);

            //manually call full-screen state code for non-compliant window managers

            main_window_show_gui(main_win, TRUE);

        }

        register_gdrom_disc_change_hook( gtk_gui_disc_changed, NULL );

        return TRUE;

    } else {

        return FALSE;

    }

}

void gui_main_loop( gboolean run )

{

    gtk_gui_update();

    if( run ) {

        dreamcast_run();

        gtk_main();

    } else {

        gtk_main();

    }

}

void gui_update_state(void)

{

    gtk_gui_update();

}

void gui_set_use_grab( gboolean flag )

{

    if( main_win != NULL ) {

        main_window_set_use_grab(main_win, flag);

    }

}

gboolean gui_error_dialog( const char *msg, ... )

{

    if( main_win != NULL ) {

        va_list args;

        GtkWidget *dialog = 

            gtk_message_dialog_new( main_window_get_frame(main_win), GTK_DIALOG_MODAL|GTK_DIALOG_DESTROY_WITH_PARENT,

                    GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, NULL );

        va_start(args, msg);

        gchar *markup = g_markup_vprintf_escaped( msg, args );

        va_end( args );

        gtk_message_dialog_set_markup( GTK_MESSAGE_DIALOG(dialog), markup );

        g_free(markup);

        gtk_dialog_run(GTK_DIALOG(dialog));

        gtk_widget_destroy(dialog);

        return TRUE;

    }

    return FALSE;

}

void gui_update_io_activity( io_activity_type io, gboolean active )

{

}

static gboolean gtk_run_later_callback( gpointer unused )

{

    dreamcast_run();

    return FALSE;

}

void gui_run_later(void)

{

    g_timeout_add_seconds(0, gtk_run_later_callback, NULL);

}

void gtk_gui_show_debugger()

{

    if( debug_win ) {

        debug_window_show(debug_win, TRUE);

    } else {

        GtkAccelGroup *accel_group = gtk_ui_manager_get_accel_group (global_ui_manager);

        GtkWidget *menubar = gtk_ui_manager_get_widget(global_ui_manager, "/DebugMenu");

        GtkWidget *toolbar = gtk_ui_manager_get_widget(global_ui_manager, "/DebugToolbar");

        GtkWidget *gdrommenuitem = gtk_ui_manager_get_widget(global_ui_manager, "/DebugMenu/FileMenu/GdromSettings");

        GtkWidget *gdrommenu = gdrom_menu_new();

        gtk_menu_item_set_submenu( GTK_MENU_ITEM(gdrommenuitem), gdrommenu );

        gchar *title = g_strdup_printf( "%s :: %s", lxdream_package_name, _("Debugger"));

        debug_win = debug_window_new( title, menubar, toolbar, accel_group  );

        g_free(title);

    }

}

void gtk_gui_show_mmio()

{

    if( mmio_win ) {

        mmio_window_show(mmio_win, TRUE);

    } else {

        gchar *title = g_strdup_printf( "%s :: %s", lxdream_package_name, _("MMIO Registers"));

        mmio_win = mmio_window_new( title );

        g_free(title);

    }

}

main_window_t gtk_gui_get_main()

{

    return main_win;

}

debug_window_t gtk_gui_get_debugger()

{

    return debug_win;

}

mmio_window_t gtk_gui_get_mmio()

{

    return mmio_win;

}

/**

 * Hook called when DC starts running. Just disables the run/step buttons

 * and enables the stop button.

 */

void gtk_gui_start( void )

{

    main_window_set_running( main_win, TRUE );

    if( debug_win != NULL ) {

        debug_window_set_running( debug_win, TRUE );

    }

    gtk_gui_nanos = 0;

    gettimeofday(&gtk_gui_lasttv,NULL);

}

/**

 * Hook called when DC stops running. Enables the run/step buttons

 * and disables the stop button.

 */

void gtk_gui_stop( void )

{

    main_window_set_running( main_win, FALSE );

    gtk_gui_update();

}

void gtk_gui_update( void )

{

    if( global_action_group ) {

        gtk_gui_enable_action("Run", !dreamcast_is_running() );

        gtk_gui_enable_action("Pause", dreamcast_is_running() );

    }

    if( debug_win ) {

        debug_window_set_running( debug_win, FALSE );

        debug_window_update(debug_win);

    }

    if( mmio_win ) {

        mmio_window_update(mmio_win);

    }

    dump_window_update_all();

}

/**

 * Module run-slice. Run the event loop 100 times/second (doesn't really need to be

 * any more often than this), and update the speed display 10 times/second. 

 *

 * Also detect if we're running too fast here and yield for a bit

 */

uint32_t gtk_gui_run_slice( uint32_t nanosecs ) 

{

    gtk_gui_nanos += nanosecs;

    if( gtk_gui_nanos > GUI_TICK_PERIOD ) { /* 10 ms */

        gtk_gui_nanos -= GUI_TICK_PERIOD;

        gtk_gui_ticks ++;

        uint32_t current_period = gtk_gui_ticks * GUI_TICK_PERIOD;

        // Run the event loop

        while( gtk_events_pending() )

            gtk_main_iteration();	

        struct timeval tv;

        gettimeofday(&tv,NULL);

        uint32_t ns = ((tv.tv_sec - gtk_gui_lasttv.tv_sec) * 1000000000) + 

        (tv.tv_usec - gtk_gui_lasttv.tv_usec)*1000;

        if( (ns * 1.05) < current_period ) {

            // We've gotten ahead - sleep for a little bit

            struct timespec tv;

            tv.tv_sec = 0;

            tv.tv_nsec = current_period - ns;

            nanosleep(&tv, &tv);

        }

        /* Update the display every 10 ticks (ie 10 times a second) and 

         * save the current tv value */

        if( gtk_gui_ticks > 10 ) {

            gtk_gui_ticks -= 10;

            double speed = (float)( (double)current_period * 100.0 / ns );

            gtk_gui_lasttv.tv_sec = tv.tv_sec;

            gtk_gui_lasttv.tv_usec = tv.tv_usec;

            main_window_set_speed( main_win, speed );

        }

    }

    return nanosecs;

}

PangoFontDescription *gui_fixed_font;

GdkColor gui_colour_normal, gui_colour_changed, gui_colour_error;

GdkColor gui_colour_warn, gui_colour_pc, gui_colour_debug;

GdkColor gui_colour_trace, gui_colour_break, gui_colour_temp_break;

GdkColor gui_colour_white;

void gtk_gui_alloc_resources() {

    GdkColormap *map;

    gui_colour_normal.red = gui_colour_normal.green = gui_colour_normal.blue = 0;

    gui_colour_changed.red = gui_colour_changed.green = 64*256;

    gui_colour_changed.blue = 154*256;

    gui_colour_error.red = 65535;

    gui_colour_error.green = gui_colour_error.blue = 64*256;

    gui_colour_pc.red = 32*256;

    gui_colour_pc.green = 170*256;

    gui_colour_pc.blue = 52*256;

    gui_colour_warn = gui_colour_changed;

    gui_colour_trace.red = 156*256;

    gui_colour_trace.green = 78*256;

    gui_colour_trace.blue = 201*256;

    gui_colour_debug = gui_colour_pc;

    gui_colour_break.red = 65535;

    gui_colour_break.green = gui_colour_break.blue = 192*256;

    gui_colour_temp_break.red = gui_colour_temp_break.green = 128*256;

    gui_colour_temp_break.blue = 32*256;

    gui_colour_white.red = gui_colour_white.green = gui_colour_white.blue = 65535;

    map = gdk_colormap_new(gdk_visual_get_best(), TRUE);

    gdk_colormap_alloc_color(map, &gui_colour_normal, TRUE, TRUE);

    gdk_colormap_alloc_color(map, &gui_colour_changed, TRUE, TRUE);

    gdk_colormap_alloc_color(map, &gui_colour_error, TRUE, TRUE);

    gdk_colormap_alloc_color(map, &gui_colour_warn, TRUE, TRUE);

    gdk_colormap_alloc_color(map, &gui_colour_pc, TRUE, TRUE);

    gdk_colormap_alloc_color(map, &gui_colour_debug, TRUE, TRUE);

    gdk_colormap_alloc_color(map, &gui_colour_trace, TRUE, TRUE);

    gdk_colormap_alloc_color(map, &gui_colour_break, TRUE, TRUE);

    gdk_colormap_alloc_color(map, &gui_colour_temp_break, TRUE, TRUE);

    gdk_colormap_alloc_color(map, &gui_colour_white, TRUE, TRUE);

    gui_fixed_font = pango_font_description_from_string("Courier 10");

}

gint gtk_gui_run_property_dialog( const gchar *title, GtkWidget *panel, gtk_dialog_done_fn fn )

{

    GtkWidget *dialog =

        gtk_dialog_new_with_buttons(title, main_window_get_frame(main_win), 

                GTK_DIALOG_MODAL|GTK_DIALOG_DESTROY_WITH_PARENT,

                GTK_STOCK_OK, GTK_RESPONSE_ACCEPT,

                GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT,

                NULL);

    gint result;

    gtk_widget_show_all(panel);

    gtk_container_add( GTK_CONTAINER(GTK_DIALOG(dialog)->vbox), panel );

    result = gtk_dialog_run( GTK_DIALOG(dialog) );

    if( fn != NULL ) {

        fn(panel, result == GTK_RESPONSE_ACCEPT);

    }

    gtk_widget_destroy( dialog );

    return result;

}

void gtk_gui_enable_action( const gchar *action, gboolean enable )

{

    gtk_action_set_sensitive( gtk_action_group_get_action( global_action_group, action), enable);

}

static void delete_frame_buffer( guchar *pixels, gpointer buffer )

{

    if( buffer != NULL ) {

        g_free(buffer);

    }

}

GdkPixbuf *gdk_pixbuf_new_from_frame_buffer( frame_buffer_t buffer )

{

    return gdk_pixbuf_new_from_data( (unsigned char *)buffer->data, 

            GDK_COLORSPACE_RGB,

            (buffer->colour_format == COLFMT_BGRA8888),

            8,

            buffer->width,

            buffer->height,

            buffer->rowstride,

            delete_frame_buffer,

            buffer );

}

/**

 * Extract the keyval of the key event if no modifier keys were pressed -

 * in other words get the keyval of the key by itself. The other way around

 * would be to use the hardware keysyms directly rather than the keyvals,

 * but the mapping looks to be messier.

 */

uint16_t gtk_get_unmodified_keyval( GdkEventKey *event )

{

    GdkKeymap *keymap = gdk_keymap_get_default();

    guint keyval;

    gdk_keymap_translate_keyboard_state( keymap, event->hardware_keycode, 0, 0, &keyval, 

                                         NULL, NULL, NULL );

    return keyval;

}

gchar *get_absolute_path( const gchar *in_path )

{

    char tmp[PATH_MAX];

    if( in_path == NULL ) {

        return NULL;

    }

    if( in_path[0] == '/' || in_path[0] == 0 ) {

        return g_strdup(in_path);

    } else {

        getcwd(tmp, sizeof(tmp));

        return g_strdup_printf("%s%c%s", tmp, G_DIR_SEPARATOR, in_path);

    }

}