// Touch panel reads. Coordinates are calibrated and rotated by LuaApp::mapTouch;
// the raw ADC pair is exposed separately because calibration cannot use itself.

#include "../bindings.h"
#include "../lua_app.h"

static int l_input_getTouch(lua_State* L) {
  LuaApp* owner = app(L);
  if (!owner->touch.touched()) {
    lua_pushnil(L);
    return 1;
  }
  TS_Point point = owner->touch.getPoint();
  int16_t x, y;
  owner->mapTouch(point, x, y);
  lua_pushinteger(L, x);
  lua_pushinteger(L, y);
  return 2;
}

static int l_input_getRawTouch(lua_State* L) {
  LuaApp* owner = app(L);
  if (!owner->touch.touched()) {
    lua_pushnil(L);
    return 1;
  }
  TS_Point point = owner->touch.getPoint();
  lua_pushinteger(L, point.y);
  lua_pushinteger(L, point.x);
  return 2;
}

static int l_input_touched(lua_State* L) {
  lua_pushboolean(L, app(L)->touch.touched());
  return 1;
}

void registerInput(lua_State* L) {
  static const luaL_Reg lib[] = {
      // --- Current touch point, calibrated and rotated.
      // @return integer|nil X, or nil when the panel is not touched.
      // @return integer|nil Y.
      {"getTouch", l_input_getTouch},
      // --- Current touch point as raw ADC readings, for calibration.
      // @return integer|nil X, or nil when the panel is not touched.
      // @return integer|nil Y.
      {"getRawTouch", l_input_getRawTouch},
      // --- Whether the panel is being touched.
      // @return boolean
      {"isTouched", l_input_touched},
      {nullptr, nullptr}};
  luaL_newlib(L, lib);
  lua_setglobal(L, "input");
}