defineVirtualDevice("projector_screen", {
  title: "Экран проектора",
  cells: {
    position: {
      type: "range",
      value: 0,
      min: 0,
      max: 100,
      readonly: false
    },
    moving: {
      type: "switch",
      value: false
    },
    open: {
      type: "pushbutton"
    },
    close: {
      type: "pushbutton"
    },
    stop: {
      type: "pushbutton"
    }
  }
});

var moveTimer = null;
var moveStartPos = 0;
var moveStartTime = 0;
var moveDirection = null;
var moveDuration = 44; // секунд на полный ход

function stopMovement() {
  dev["projector_screen/moving"] = false;
  dev["wb-mr6c_XX/K5"] = false; // заменить на реальные каналы
  dev["wb-mr6c_XX/K6"] = false;
  moveDirection = null;
  if (moveTimer) {
    clearTimeout(moveTimer);
    moveTimer = null;
  }
}

function startMovement(dir) {
  stopMovement();
  moveDirection = dir;
  dev["projector_screen/moving"] = true;
  moveStartPos = dev["projector_screen/position"];
  moveStartTime = Date.now();
  
  if (dir == "up") dev["wb-mr6c_XX/K5"] = true;   // открыть
  if (dir == "down") dev["wb-mr6c_XX/K6"] = true; // закрыть
  
  moveTimer = setInterval(function() {
    var elapsed = (Date.now() - moveStartTime) / 1000;
    var delta = (elapsed / moveDuration) * 100;
    var newPos = moveDirection == "up"
      ? moveStartPos + delta
      : moveStartPos - delta;
    newPos = Math.max(0, Math.min(100, newPos));
    dev["projector_screen/position"] = newPos;

    if (newPos == 0 || newPos == 100) {
      stopMovement();
    }
  }, 500); // обновление каждые 0.5 с
}

// кнопки управления
defineRule("screen_open", {
  whenChanged: "projector_screen/open",
  then: function() { startMovement("up"); }
});

defineRule("screen_close", {
  whenChanged: "projector_screen/close",
  then: function() { startMovement("down"); }
});

defineRule("screen_stop", {
  whenChanged: "projector_screen/stop",
  then: function() { stopMovement(); }
});

// слайдер
defineRule("screen_set_position", {
  whenChanged: "projector_screen/position",
  then: function(newValue, devName, cellName) {
    if (dev["projector_screen/moving"]) return; // игнор, если движется
    var cur = dev["projector_screen/position"];
    if (newValue > cur) startMovement("up");
    else if (newValue < cur) startMovement("down");
  }
});