#include "input.h"
#include "chip8.h"
#include <stdio.h>

void input_update(SDL_Event *event, uint8_t *keyboard)
{
    uint8_t key = map_sdl_to_chip8(event->key.keysym.sym);
    if (key != 0xFF)
    {
        if (event->type == SDL_KEYDOWN)
        {
            keyboard[key] = 1;
        }
        else if (event->type == SDL_KEYUP)
        {
            keyboard[key] = 0;
        }
    }
}


uint8_t map_sdl_to_chip8(SDL_Keycode key)
{
    // Map to a numpad-like layout:
    // 1 2 3 4 → 1 2 3 C
    // Q W E R → 4 5 6 D
    // A S D F → 7 8 9 E
    // Z X C V → A 0 B F
    switch (key)
    {
        case SDLK_1: return 0x1;
        case SDLK_2: return 0x2;
        case SDLK_3: return 0x3;
        case SDLK_4: return 0xC;
        case SDLK_q: return 0x4;
        case SDLK_w: return 0x5;
        case SDLK_e: return 0x6;
        case SDLK_r: return 0xD;
        case SDLK_a: return 0x7;
        case SDLK_s: return 0x8;
        case SDLK_d: return 0x9;
        case SDLK_f: return 0xE;
        case SDLK_z: return 0xA;
        case SDLK_x: return 0x0;
        case SDLK_c: return 0xB;
        case SDLK_v: return 0xF;
        default:     return 0xFF;
    }
}


uint8_t get_pressed_key(t_chip8 *emu)
{
    for (int i = 0; i < 16; i++)
    {
        if (emu->keyboard.keyboard[i])
            return i;
    }
    return 0xFF; // No key pressed
}