#include "hardware/spi.h"
#include "hardware/sync.h"
#include "pico/binary_info.h"

#include "../../../libraries/pico_scroll/pico_scroll.hpp"

using namespace pimoroni;

PicoScroll *scroll = nullptr;


extern "C" {
#include "pico_scroll.h"

#define NOT_INITIALISED_MSG     "Cannot call this function, as picoscroll is not initialised. Call picoscroll.init() first."

mp_obj_t picoscroll_init() {
    if(scroll == nullptr)
        scroll = new PicoScroll();
    scroll->init();
    return mp_const_none;
}

mp_obj_t picoscroll_get_width() {
    return mp_obj_new_int(PicoScroll::WIDTH);
}

mp_obj_t picoscroll_get_height() {
    return mp_obj_new_int(PicoScroll::HEIGHT);
}

mp_obj_t picoscroll_update() {
    if(scroll != nullptr)
        scroll->update();
    else
        mp_raise_msg(&mp_type_RuntimeError, NOT_INITIALISED_MSG);
    return mp_const_none;
}

mp_obj_t picoscroll_set_pixel(mp_obj_t x_obj, mp_obj_t y_obj, mp_obj_t v_obj) {
    if(scroll != nullptr) {
        int x = mp_obj_get_int(x_obj);
        int y = mp_obj_get_int(y_obj);
        int val = mp_obj_get_int(v_obj);

        if(x < 0 || x >= PicoScroll::WIDTH || y < 0 || y >= PicoScroll::HEIGHT)
            mp_raise_ValueError("x or y out of range.");
        else {
            if(val < 0 || val > 255)
                mp_raise_ValueError("val out of range. Expected 0 to 255");
            else
                scroll->set_pixel(x, y, val);
        }
    }
    else
        mp_raise_msg(&mp_type_RuntimeError, NOT_INITIALISED_MSG);

    return mp_const_none;
}

mp_obj_t picoscroll_clear() {
    if(scroll != nullptr)
        scroll->clear();
    else
        mp_raise_msg(&mp_type_RuntimeError, NOT_INITIALISED_MSG);
    return mp_const_none;
}

mp_obj_t picoscroll_is_pressed(mp_obj_t button_obj) {
    bool buttonPressed = false;
    
    if(scroll != nullptr) {
        int buttonID = mp_obj_get_int(button_obj);    
        switch(buttonID) {
        case 0:
            buttonPressed = scroll->is_pressed(PicoScroll::A);
            break;

        case 1:
            buttonPressed = scroll->is_pressed(PicoScroll::B);
            break;

        case 2:
            buttonPressed = scroll->is_pressed(PicoScroll::X);
            break;

        case 3:
            buttonPressed = scroll->is_pressed(PicoScroll::Y);
            break;

        default:
            mp_raise_ValueError("button not valid. Expected 0 to 3");
            break;
        }
    }
    else
        mp_raise_msg(&mp_type_RuntimeError, NOT_INITIALISED_MSG);

    return buttonPressed ? mp_const_true : mp_const_false;
}
}