#include <gearlib.h>

Camera* create_camera(vec2 pos) {
    Camera* camera = calloc(sizeof(Camera), 1);
    camera->view = mat4Transpose(mat4Translate(pos.x, pos.y, -3.0f));

    return camera;
}

void update_camera(Camera* camera, Window window) {
    int width, height;
    glfwGetWindowSize(window, &width, &height);

    assert(camera != NULL);
    camera->projection = mat4Transpose(mat4Ortho(0.0f, width, height, 0.0f, 0.0f, 1000.0f));
    //camera->projection = mat4Transpose(mat4Perspective(45.0f * DEG2RAD, ((double)width / (double)height), 0.1f, 100.0f));
}

typedef struct CameraData {
    mat4 view_projection;
} CameraData;

int main() {
    Window window = create_window(800, 600, "gearlib");
    glfwSwapInterval(0);
    enable_debugging();
    setup_quads();
    setup_textures();

    Camera* camera = create_camera(vec2(0.0f, 0.0f));
    set_active_camera(camera);

    Texture cat = load_texture("assets/cat.png");
 
    /*uint32_t cat = load_texture("assets/cat.png");
    uint32_t cuddle = load_texture("assets/cuddle.png");
    uint32_t parrots = load_texture("assets/parrots.png");*/

    double time = glfwGetTime();
    /*double total_time = 0;
    int frames = 0;
    int fps = 0;*/

    uint32_t ubo;
    glCreateBuffers(1, &ubo);
    glNamedBufferStorage(ubo, sizeof(Camera), NULL, GL_DYNAMIC_STORAGE_BIT);
    glBindBufferBase(GL_UNIFORM_BUFFER, 0, ubo);

    float angle = 0;

    while (!glfwWindowShouldClose(window)) {
        process_input(window);
        update_camera(camera, window);

        glNamedBufferSubData(ubo, 0, sizeof(Camera), camera);

        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);
    
        /*for(int i = 0; i < 33; i++) {
            draw_texture(parrots, vec3(-0.4f, 0.4f, 0.0f), WHITE);
            draw_texture(cat, vec3(0.0f, 0.0f, 0.0f), WHITE);
            draw_texture(cuddle, vec3(0.0f, -0.4f, 0.0f), WHITE);
        }*/

        //draw_texture(cat, vec2(300, 400), vec2(700, 700), WHITE);         
       
        //for(int i = 0; i < 255; i++)
            //draw_quad(vec2(i, i), vec2(10, 10), vec4(i / 255.0f, i / 255.0f, i / 255.0f, 1.0f));

        mat4 transform = mat4Multiply(
                mat4Multiply(
                    mat4Scale(100, 100, 1),
                    mat4Identity()),
                    /*mat4Rotate(vec3(1.0f, 0.5f, 0.0f), angle)),*/
                    mat4Translate(0, 0, 1));
        transform = mat4Multiply(mat4Translate(0.5, 0.5f, 0.0f), transform);

        draw_texture_trans(cat, transform, WHITE);

        flush();

        double end_time = glfwGetTime();
        double frame_time = end_time - time;
        //total_time += frame_time;
        double fps = 1 / frame_time;

        angle += frame_time;
        
        time = end_time;

        /*frames++;
        if(total_time > 1.0) {
            fps = frames;
            frames = 0;
            total_time = 0;
        }*/

        //printf("%lf, %lf\n", frame_time, fps);

        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    glfwDestroyWindow(window);
    glfwTerminate();
    return 0;
}









/*
double time = glfwGetTime();
...
double end_time = glfwGetTime();
double frame_time = end_time - time;
double fps = 1 / frame_time;
time = end_time;

printf("%lf, %lf, %d, %d\n", frame_time, fps, 0, 0);
*/