#include <Events.h>

#include "../src/dmg.h"
#include "emulator.h"
#include "input.h"
#include "dialogs.h"

// indices match keyMappings order
// (up, down, left, right, a, b, select, start)
static struct {
  int button;
  int field;
} buttonMap[8] = {
  { BUTTON_UP, FIELD_JOY },
  { BUTTON_DOWN, FIELD_JOY },
  { BUTTON_LEFT, FIELD_JOY },
  { BUTTON_RIGHT, FIELD_JOY },
  { BUTTON_A, FIELD_ACTION },
  { BUTTON_B, FIELD_ACTION },
  { BUTTON_SELECT, FIELD_ACTION },
  { BUTTON_START, FIELD_ACTION }
};

#define KEY_COMMAND 0x37

#define KEY_IS_DOWN(raw, code) (((raw)[(code) >> 3] >> ((code) & 7)) & 1)

// edge-detect against the last poll
void PollGameInput(void)
{
  KeyMap keys;
  unsigned char *raw = (unsigned char *) keys;
  static unsigned char prev[8];
  int k, cmd;

  GetKeys(keys);
  cmd = KEY_IS_DOWN(raw, KEY_COMMAND);

  for (k = 0; k < 8; k++) {
    int code = keyMappings[k];
    // treat everything as released while a menu shortcut is being typed
    unsigned char down = cmd ? 0 : KEY_IS_DOWN(raw, code);

    if (down == prev[k]) {
      continue;
    }
    prev[k] = down;
    dmg_set_button(&dmg, buttonMap[k].field, buttonMap[k].button, down);
  }
}