#include "ds.h"
#include "uinput.h"
#include <assert.h>
#include <stdint.h>
#include <string.h>


#include <stdio.h>


#define maybe_do_uinput(button, uinput_button) \
do { \
    if (!previous.button && ds->button) \
        do_uinput(uinput_fd, uinput_button, 1, EV_KEY); \
    else if (previous.button && !ds->button) \
        do_uinput(uinput_fd, uinput_button, 0, EV_KEY); \
} while(0)


/*
    Throws events according to ds keys status
*/
void ds_process_evt(ds_t* ds, int uinput_fd){

    static ds_t previous;

    assert(8 == sizeof(ds_t));

    /* BUTTONS: */
    maybe_do_uinput(a, BTN_A);
    maybe_do_uinput(b, BTN_B);
    maybe_do_uinput(x, BTN_X);
    maybe_do_uinput(y, BTN_Y);
    maybe_do_uinput(l, BTN_TL);
    maybe_do_uinput(r, BTN_TR);
    maybe_do_uinput(zl, BTN_TL2);
    maybe_do_uinput(zr, BTN_TR2);
    maybe_do_uinput(start, BTN_START);
    maybe_do_uinput(select, BTN_SELECT);
    maybe_do_uinput(up, BTN_DPAD_UP);
    maybe_do_uinput(down, BTN_DPAD_DOWN);
    maybe_do_uinput(left, BTN_DPAD_LEFT);
    maybe_do_uinput(right, BTN_DPAD_RIGHT);

    /* DIRECTIONS */

    if(previous.pad.x != ds->pad.x)
        do_uinput(uinput_fd, ABS_X, ds->pad.x, EV_ABS);

    if(previous.pad.y != ds->pad.y)
        do_uinput(uinput_fd, ABS_Y, ds->pad.y, EV_ABS);

    if(previous.cpad.x != ds->cpad.x)
        do_uinput(uinput_fd, ABS_RX, ds->cpad.x, EV_ABS);

    if(previous.cpad.y != ds->cpad.y)
        do_uinput(uinput_fd, ABS_RY, ds->cpad.y, EV_ABS);

    flush_uinput(uinput_fd);

    memcpy(&previous, ds, sizeof(ds_t));

    return;
}