#include <iostream>

#include "rendering/Window.h"

Window::Window(TextInput*& textInput, const WindowOptions& options)
    : textInput(textInput), window(nullptr) {
    glfwDefaultWindowHints();
    glfwWindowHint(GLFW_VISIBLE, 0);
    glfwWindowHint(GLFW_RESIZABLE, 1);
    glfwWindowHint(GLFW_DECORATED, !options.fullscreen);
    glfwWindowHint(GLFW_DOUBLEBUFFER, 1);

    if(options.es) {
        glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
    } else {
        glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
    }
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, options.majorVersion);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, options.minorVersion);

    GLFWmonitor* monitor =
        options.fullscreen ? glfwGetPrimaryMonitor() : nullptr;
    window = glfwCreateWindow(options.size.width, options.size.height,
                              options.name, monitor, nullptr);
    if(window == nullptr) {
        std::cout << "could not create window\n";
        return;
    }
    glfwSetWindowUserPointer(window, this);
    glfwSetKeyCallback(window, keyCallback);
    glfwSetCharCallback(window, charCallback);

    glfwMakeContextCurrent(window);
    glfwSwapInterval(options.vsync);
}

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);
}

void Window::trapCursor(bool trap) {
    glfwSetInputMode(window, GLFW_CURSOR,
                     trap ? GLFW_CURSOR_DISABLED : GLFW_CURSOR_NORMAL);
}

Size Window::getSize() const {
    Size size(0, 0);
    glfwGetWindowSize(window, &size.width, &size.height);
    return size;
}

Size Window::getFramebufferSize() const {
    Size size(0, 0);
    glfwGetFramebufferSize(window, &size.width, &size.height);
    return size;
}

bool Window::isKeyDown(int key) const {
    return glfwGetKey(window, key) == GLFW_PRESS;
}

bool Window::isMouseDown(int mouse) const {
    return glfwGetMouseButton(window, mouse) == GLFW_PRESS;
}

void Window::getMousePosition(double& x, double& y) const {
    glfwGetCursorPos(window, &x, &y);
}

void Window::keyCallback(GLFWwindow* w, int key, int scancode, int action,
                         int mods) {
    void* p = glfwGetWindowUserPointer(w);
    if(p != nullptr) {
        TextInput* input = static_cast<Window*>(p)->textInput;
        if(input != nullptr) {
            input->onKeyEvent(key, scancode, action, mods);
        }
    }
}
void Window::charCallback(GLFWwindow* w, unsigned int codepoint) {
    void* p = glfwGetWindowUserPointer(w);
    if(p != nullptr) {
        TextInput* input = static_cast<Window*>(p)->textInput;
        if(input != nullptr) {
            input->onCharEvent(codepoint);
        }
    }
}