#include "../../include/mglpp/window/Window.hpp"
#include "../../include/mglpp/window/Event.hpp"
#include "../../include/mglpp/graphics/Drawable.hpp"
#include "../../include/mglpp/graphics/Shader.hpp"

extern "C" {
#include <mgl/graphics/vertex.h>
#include <mgl/window/event.h>
#include <mgl/mgl.h>
}

namespace mgl {
    Window::Window() {
        window.window = 0;
    }

    Window::~Window() {
        mgl_window_deinit(&window);
    }

    bool Window::create(const char *title, int width, int height) {
        if(window.window)
            return false;
        return mgl_window_create_with_params(&window, title, width, height, 0) == 0;
    }

    bool Window::create(WindowHandle existing_window) {
        if(window.window)
            return false;
        return mgl_window_init_from_existing_window(&window, existing_window) == 0;
    }

    bool Window::poll_event(Event &event) {
        if(!window.window)
            return false;
        return mgl_window_poll_event(&window, (mgl_event*)&event);
    }

    void Window::clear(Color color) {
        if(!window.window)
            return;
        mgl_window_clear(&window, mgl_color{color.r, color.g, color.b, color.a});
    }

    void Window::draw(Drawable &drawable, Shader *shader) {
        // TODO: Make the opengl context active for this thread and window, if it already isn't
        if(shader)
            Shader::use(shader);
        drawable.draw(*this);
        if(shader)
            Shader::use(nullptr);
    }
    
    void Window::draw(const Vertex *vertices, size_t vertex_count, PrimitiveType primitive_type, Shader *shader) {
        // TODO: Make the opengl context active for this thread and window, if it already isn't
        if(shader)
            Shader::use(shader);

        mgl_context *context = mgl_get_context();
        mgl_vertices_draw(context, (const mgl_vertex*)vertices, vertex_count, (mgl_primitive_type)primitive_type);

        if(shader)
            Shader::use(nullptr);
    }

    void Window::display() {
        if(!window.window)
            return;
        mgl_window_display(&window);
    }

    // TODO: Implement
    bool Window::is_open() const {
        return true;
    }

    // TODO: Implement
    bool Window::has_focus() const {
        return true;
    }

    // TODO: Implement
    void Window::close() {

    }

    // TODO: Implement
    void Window::set_title(const char *title) {

    }

    // TODO: Implement
    void Window::set_framerate_limit(unsigned int fps) {

    }

    // TODO: Implement
    void Window::set_key_repeat_enabled(bool enabled) {

    }

    // TODO: Implement
    void Window::set_cursor_visible(bool visible) {

    }

    vec2i Window::get_size() const {
        return { window.size.x, window.size.y };
    }

    vec2i Window::get_cursor_position() const {
        return { window.cursor_position.x, window.cursor_position.y };
    }

    WindowHandle Window::get_system_handle() const {
        return window.window;
    }
}