#include <iostream>

#include "rendering/wrapper/Window.h"

Window::Window(Size& size, Controller& controller, const Options& options) : window(nullptr), size(size),
controller(controller) {
    glfwDefaultWindowHints();
    glfwWindowHint(GLFW_VISIBLE, 0);
    glfwWindowHint(GLFW_RESIZABLE, 1);
    glfwWindowHint(GLFW_DECORATED, !options.fullscreen);
    glfwWindowHint(GLFW_DOUBLEBUFFER, 1);

    glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);

    GLFWmonitor* monitor = options.fullscreen ? glfwGetPrimaryMonitor() : nullptr;
    window = glfwCreateWindow(size.width, size.height, options.name, monitor, nullptr);
    if(window == nullptr) {
        std::cout << "could not create window\n";
        return;
    }
    glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
    glfwMakeContextCurrent(window);
    glfwSwapInterval(options.vsync);

    glfwSetWindowUserPointer(window, this);

    glfwSetFramebufferSizeCallback(window, [](GLFWwindow* glfwWindow, int newWidth, int newHeight) {
        glViewport(0, 0, newWidth, newHeight);
        void* data = glfwGetWindowUserPointer(glfwWindow);
        if(data == nullptr) {
            return;
        }
        Window& w = *static_cast<Window*> (data);
        w.size.width = newWidth;
        w.size.height = newHeight;
    });
    glfwSetKeyCallback(window, [](GLFWwindow* glfwWindow, int key, int, int action, int) {
        void* data = glfwGetWindowUserPointer(glfwWindow);
        if(data == nullptr) {
            return;
        }
        Window& w = *static_cast<Window*> (data);
        if(action == GLFW_PRESS) {
            w.controller.press(key);
        } else if(action == GLFW_RELEASE) {
            w.controller.release(key);
        }
    });
}

Window::~Window() {
    if(window != nullptr) {
        glfwDestroyWindow(window);
    }
}

bool Window::hasError() const {
    return window == nullptr;
}

void Window::show() {
    glfwShowWindow(window);
}

bool Window::shouldClose() const {
    return glfwWindowShouldClose(window);
}

void Window::swapBuffers() {
    glfwSwapBuffers(window);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}