#include <MiniFB.h>
#include <stdio.h>
#include <stdint.h>

#define kUnused(var)    (void) var

#define WIDTH      800
#define HEIGHT     600
static unsigned int g_buffer[WIDTH * HEIGHT];
static bool         g_active = true;

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void active(struct Window *window, bool isActive) {
    const char *window_title = "";
    if(window) {
        window_title = (const char *) mfb_get_user_data(window);
    }
    fprintf(stdout, "%s > active: %d\n", window_title, isActive);
    g_active = isActive;
}

void resize(struct Window *window, int width, int height) {
    uint32_t x = 0;
    uint32_t y = 0;
    const char *window_title = "";
    if(window) {
        window_title = (const char *) mfb_get_user_data(window);
    }

    fprintf(stdout, "%s > resize: %d, %d\n", window_title, width, height);
    if(width > WIDTH) {
        x = (width - WIDTH) >> 1;
        width = WIDTH;
    }
    if(height > HEIGHT) {
        y = (height - HEIGHT) >> 1;
        height = HEIGHT;
    }
    mfb_set_viewport(window, x, y, width, height);
}

void keyboard(struct Window *window, Key key, KeyMod mod, bool isPressed) {
    const char *window_title = "";
    if(window) {
        window_title = (const char *) mfb_get_user_data(window);
    }
    fprintf(stdout, "%s > keyboard: key: %s (pressed: %d) [KeyMod: %x]\n", window_title, mfb_get_key_name(key), isPressed, mod);
    if(key == KB_KEY_ESCAPE) {
        mfb_close(window);
    }    
}

void char_input(struct Window *window, unsigned int charCode) {
    const char *window_title = "";
    if(window) {
        window_title = (const char *) mfb_get_user_data(window);
    }
    fprintf(stdout, "%s > charCode: %d\n", window_title, charCode);
}

void mouse_btn(struct Window *window, MouseButton button, KeyMod mod, bool isPressed) {
    const char *window_title = "";
    if(window) {
        window_title = (const char *) mfb_get_user_data(window);
    }
    fprintf(stdout, "%s > mouse_btn: button: %d (pressed: %d) [KeyMod: %x]\n", window_title, button, isPressed, mod);
}

void mouse_move(struct Window *window, int x, int y) {
    kUnused(window);
    kUnused(x);
    kUnused(y);
    // const char *window_title = "";
    // if(window) {
    //     window_t(const char *) itle = mfb_get_user_data(window);
    // }
    //fprintf(stdout, "%s > mouse_move: %d, %d\n", window_title, x, y);
}

void mouse_scroll(struct Window *window, KeyMod mod, float deltaX, float deltaY) {
    const char *window_title = "";
    if(window) {
        window_title = (const char *) mfb_get_user_data(window);
    }
    fprintf(stdout, "%s > mouse_scroll: x: %f, y: %f [KeyMod: %x]\n", window_title, deltaX, deltaY, mod);
}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

int main()
{
    int noise, carry, seed = 0xbeef;

    struct Window *window = mfb_open_ex("Input Events Test", WIDTH, HEIGHT, WF_RESIZABLE);
    if (!window)
        return 0;

    mfb_set_active_callback(window, active);
    mfb_set_resize_callback(window, resize);
    mfb_set_keyboard_callback(window, keyboard);
    mfb_set_char_input_callback(window, char_input);
    mfb_set_mouse_button_callback(window, mouse_btn);
    mfb_set_mouse_move_callback(window, mouse_move);
    mfb_set_mouse_scroll_callback(window, mouse_scroll);

    mfb_set_user_data(window, (void *) "Input Events Test");

    for (;;)
    {
        int         i;
        UpdateState state;

        if(g_active) 
        {
            for (i = 0; i < WIDTH * HEIGHT; ++i)
            {
                noise = seed;
                noise >>= 3;
                noise ^= seed;
                carry = noise & 1;
                noise >>= 1;
                seed >>= 1;
                seed |= (carry << 30);
                noise &= 0xFF;
                g_buffer[i] = MFB_RGB(noise, noise, noise); 
            }

            state = mfb_update(window, g_buffer);
        }
        else {
            state = mfb_update_events(window);
        }
        if (state != STATE_OK) {
            window = 0x0;
            break;
        }
    }

    return 0;
}