namespace XmobiTea.MiniDeviceId
{
    using System;
    using UnityEngine;

    /// <summary>
    /// WebGL implementation that creates and persists an app-local GUID in PlayerPrefs.
    /// This is not a hardware device identifier.
    /// </summary>
    public class Implement
    {
        private static string deviceId
        {
            get { return PlayerPrefs.GetString("MiniDeviceId_DeviceId", ""); }
            set { PlayerPrefs.SetString("MiniDeviceId_DeviceId", value); }
        }

        /// <summary>
        /// Returns the persisted WebGL identifier, creating and saving one if needed.
        /// </summary>
        public static string Get()
        {
            var deviceId = Implement.deviceId;

            if (string.IsNullOrEmpty(deviceId))
            {
                deviceId = Guid.NewGuid().ToString();
                Implement.deviceId = deviceId;
                PlayerPrefs.Save();
            }

            return deviceId;
        }
    }
}