#ifndef main_h
#define main_h

#include <gtk/gtk.h>
#include <epoxy/gl.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <Core/gb.h>

#include "macros.h"
#include "settings.h"
#include "shader.h"

typedef struct UserData {
	bool fullscreen;
	GFile *file;
	gchar *boot_rom_path;
	gchar *config_path;
	GB_model_t model;
} UserData;

typedef struct{
	int16_t x, y;
	uint16_t w, h;
} Rect;

#define BUTTON_MASK_A      0x01
#define BUTTON_MASK_B      0x02
#define BUTTON_MASK_START  0x04
#define BUTTON_MASK_SELECT 0x08
#define BUTTON_MASK_UP     0x10
#define BUTTON_MASK_DOWN   0x20
#define BUTTON_MASK_LEFT   0x40
#define BUTTON_MASK_RIGHT  0x80

int main(int argc, char *argv[]);

static gint handle_local_options(GApplication *app, GVariantDict *options, gpointer user_data_gptr);

// GtkGlArea crash workaround
void gl_check_realize(GtkWidget *w, gpointer user_data_gptr);
gboolean test_gl_support(void);

static GMenuModel *get_menu_model(GApplication *app, const char *id);
static void create_fallback_canvas(void);
static void setup_menu(GApplication *app);
static void set_combo_box_row_separator_func(GtkContainer *container);
static gboolean is_separator(GtkTreeModel *model, GtkTreeIter *iter, gpointer data);

// Rendering support functions
static unsigned char number_of_buffers(void);
static uint32_t *get_pixels(void);
static uint32_t *get_current_buffer(void);
static uint32_t *get_previous_buffer(void);
static void flip(void);

// GApplication signals
static void startup(GApplication *app, gpointer user_data_gptr);
static void activate(GApplication *app, gpointer user_data_gptr);
static void shutdown(GApplication *app, GFile **files, gint n_files, const gchar *hint, gpointer user_data_gptr);
static void open(GApplication *app, GFile **files, gint n_files, const gchar *hint, gpointer user_data_gptr);
static void quit(GApplication *app);
static gboolean on_key_press(GtkWidget *w, GdkEventKey *event, gpointer data);

// App actions
static void activate_about(GSimpleAction *action, GVariant *parameter, gpointer app);
static void activate_open_gtk_debugger(GSimpleAction *action, GVariant *parameter, gpointer app);
static void activate_open_memory_viewer(GSimpleAction *action, GVariant *parameter, gpointer app);
static void activate_open_vram_viewer(GSimpleAction *action, GVariant *parameter, gpointer app);
static void activate_open(GSimpleAction *action, GVariant *parameter, gpointer app);
static void activate_preferences(GSimpleAction *action, GVariant *parameter, gpointer app);
static void activate_quit(GSimpleAction *action, GVariant *parameter, gpointer app);

// Signal callback
static void on_quit(GtkWidget *w, gpointer app);

// Renderer area bindings
static void gl_init(GtkWidget *w);
static void gl_draw();
static void gl_finish();
static gboolean on_draw_fallback(GtkWidget *widget, cairo_t *cr, gpointer data);
static void resize();

// VRAM viewer bindings
static void on_vram_viewer_realize();
static void on_vram_viewer_unrealize();
static gboolean on_draw_vram_viewer_tilemap(GtkWidget *widget, cairo_t *cr, gpointer data);
static gboolean on_draw_vram_viewer_tileset(GtkWidget *widget, cairo_t *cr, gpointer data);

// Option bindings
G_MODULE_EXPORT void on_boot_rom_location_changed(GtkWidget *w, gpointer user_data_gptr);
G_MODULE_EXPORT void on_cgb_model_changed(GtkWidget *w, gpointer user_data_gptr);
G_MODULE_EXPORT void on_color_correction_changed(GtkWidget *w, gpointer user_data_gptr);
G_MODULE_EXPORT void on_color_menubar_override_changed(GtkWidget *w, gpointer user_data_gptr);
G_MODULE_EXPORT void on_dmg_model_changed(GtkWidget *w, gpointer user_data_gptr);
G_MODULE_EXPORT void on_graphic_filter_changed(GtkWidget *w, gpointer user_data_gptr);
G_MODULE_EXPORT void on_highpass_filter_changed(GtkWidget *w, gpointer user_data_gptr);
G_MODULE_EXPORT void on_keep_aspect_ratio_changed(GtkWidget *w, gpointer user_data_gptr);
G_MODULE_EXPORT void on_rewind_duration_changed(GtkWidget *w, gpointer user_data_gptr);
G_MODULE_EXPORT void on_sgb_model_changed(GtkWidget *w, gpointer user_data_gptr);
G_MODULE_EXPORT void on_use_integer_scaling_changed(GtkWidget *w, gpointer user_data_gptr);

static uint32_t rgb_encode(GB_gameboy_t *gb, uint8_t r, uint8_t g, uint8_t b);
static uint32_t rgb_encode_fallback(GB_gameboy_t *gb, uint8_t r, uint8_t g, uint8_t b);
static void render_texture(void *pixels, void *previous);
static void update_viewport(void);
static void update_window_geometry();

static void handle_events(GB_gameboy_t *gb);
static void vblank(GB_gameboy_t *gb);
static void run(GApplication *app, UserData *user_data);

#endif /* main_h */