const STORAGE_KEY = "devices";
const MERCHANT_KEY = "merchant";

export function getDevices(): DeviceData[] {
  try {
    return JSON.parse(localStorage.getItem(STORAGE_KEY) || "[]");
  } catch {
    return [];
  }
}

export function saveDevices(devices: DeviceData[]) {
  localStorage.setItem(STORAGE_KEY, JSON.stringify(devices));
}

export function isDuplicateDevice(
  devices: DeviceData[],
  newDevice: DeviceData
) {
  return devices.some(d =>
    d.towerNumber === newDevice.towerNumber &&
    d.floorName === newDevice.floorName &&
    d.unitNumber === newDevice.unitNumber &&
    d.roomName === newDevice.roomName &&
    d.code === newDevice.code &&
    d.deviceType === newDevice.deviceType
  );
}


export function getMerchant(): MerchantForm | null {
  try {
    return JSON.parse(localStorage.getItem(MERCHANT_KEY) || "");
  } catch {
    return null;
  }
}

export function saveMerchant(val: MerchantForm) {
  localStorage.setItem(MERCHANT_KEY, JSON.stringify(val));
}