/**
 * Copyright (C) 2013 Citra Emulator
 *
 * @file    emu_window_glfw.cpp
 * @author  ShizZy <shizzy@6bit.net>
 * @date    2013-09-04
 * @brief   Implementation implementation of EmuWindow class for GLFW
 *
 * @section LICENSE
 * 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 at
 * http://www.gnu.org/copyleft/gpl.html
 *
 * Official project repository can be found at:
 * http://code.google.com/p/gekko-gc-emu/
 */

#include "common.h"
#include "video_core.h"
#include "emu_window_glfw.h"

static void OnKeyEvent(GLFWwindow* win, int key, int action) {
 //   EmuWindow_GLFW* emuwin = (EmuWindow_GLFW*)glfwGetWindowUserPointer(win);
	//input_common::GCController::GCButtonState state;

	//if (action == GLFW_PRESS) {
	//	state = input_common::GCController::PRESSED;
	//} else {
	//	state = input_common::GCController::RELEASED;
	//}
 //   for (int channel = 0; channel < 4 && emuwin->controller_interface(); ++channel) {
	//	emuwin->controller_interface()->SetControllerStatus(channel, key, state);
 //   }
}

static void OnWindowSizeEvent(GLFWwindow* win, int width, int height) {
    EmuWindow_GLFW* emuwin = (EmuWindow_GLFW*)glfwGetWindowUserPointer(win);
    emuwin->set_client_area_width(width);
    emuwin->set_client_area_height(height);
}

/// EmuWindow_GLFW constructor
EmuWindow_GLFW::EmuWindow_GLFW() {
    // Initialize the window
    if(glfwInit() != GL_TRUE) {
        printf("Failed to initialize GLFW! Exiting...");
        exit(1);
    }
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
    render_window_ = glfwCreateWindow(VideoCore::kScreenTopWidth, 
        (VideoCore::kScreenTopHeight + VideoCore::kScreenBottomHeight), "citra", NULL, NULL);

    // Setup callbacks
    glfwSetWindowUserPointer(render_window_, this);
    //glfwSetKeyCallback(render_window_, OnKeyEvent);
    //glfwSetWindowSizeCallback(render_window_, OnWindowSizeEvent);

    DoneCurrent();
}

/// EmuWindow_GLFW destructor
EmuWindow_GLFW::~EmuWindow_GLFW() {
    glfwTerminate();
}

/// Swap buffers to display the next frame
void EmuWindow_GLFW::SwapBuffers() {
    glfwSwapBuffers(render_window_);
}

/// Polls window events
void EmuWindow_GLFW::PollEvents() {
    // TODO(ShizZy): Does this belong here? This is a reasonable place to update the window title
    //  from the main thread, but this should probably be in an event handler...
    static char title[128];
    sprintf(title, "%s (FPS: %02.02f)", window_title_.c_str(), 0.0f);
    glfwSetWindowTitle(render_window_, title);

    glfwPollEvents();
}

/// Makes the GLFW OpenGL context current for the caller thread
void EmuWindow_GLFW::MakeCurrent() {
    glfwMakeContextCurrent(render_window_);
}

/// Releases (dunno if this is the "right" word) the GLFW context from the caller thread
void EmuWindow_GLFW::DoneCurrent() {
    glfwMakeContextCurrent(NULL);
}