using System;
using UnityEngine;
using UnityEngine.Serialization;

namespace Guru
{
    [Serializable]
    internal class GuruSDKModel
    {
        private static GuruSDKModel _instance;
        public static GuruSDKModel Instance
        {
            get
            {
                if (null == _instance) _instance = Load();
                return _instance;
            }
        }

        //-------------- data ---------------
        public int b_level = 0;
        public int b_play = 0;
        public int buy_count = 0;
        //-------------- data ---------------

        private float _lastSavedTime = 0;
        
        public int SuccessLevelCount
        {
            get
            {
                if(_successLevel == null) InitProperties();
                return _successLevel.Value;
            }
            set => _successLevel.Value = value;
        }

        public int TotalPlayedCount
        {
            get
            {
                if(_totalPlayed == null) InitProperties();
                return _totalPlayed.Value;
            }
            set => _totalPlayed.Value = value;
        }

        public int PurchasedCount
        {
            get
            {
                if(_purchasedCount == null) InitProperties();
                return _purchasedCount.Value;
            }
            set => _purchasedCount.Value = value;
        }

        public bool IsIAPUser => PurchasedCount > 0;

        
        private BindableProperty<int> _successLevel;
        private BindableProperty<int> _totalPlayed;
        private BindableProperty<int> _purchasedCount;
        
        public BindableProperty<int> PropBLevel => _successLevel;
        public BindableProperty<int> PropBPlay => _totalPlayed;
        public BindableProperty<int> PropBuyCount => _purchasedCount;


        #region 初始化

        private const float SaveInterval = 3;
        private const string SaveKey = "com.guru.sdk.model.save";
        public static GuruSDKModel Load()
        {
            GuruSDKModel model = null;
            if (PlayerPrefs.HasKey(SaveKey))
            {
                var json = PlayerPrefs.GetString(SaveKey, "");
                if (!string.IsNullOrEmpty(json))
                {
                    try
                    {
                        model =  JsonUtility.FromJson<GuruSDKModel>(json);
                    }
                    catch (Exception e)
                    {
                        Debug.LogError(e);
                    }
                }
            }
            if(model == null) model = new GuruSDKModel();
            model.InitProperties();
            return model;
        }
        
        /// <summary>
        /// 保存至数据
        /// </summary>
        private void SaveToPlayerPrefs()
        {
            var json = JsonUtility.ToJson(this);
            PlayerPrefs.SetString(SaveKey, json);
        }

        public void InitProperties()
        {
            _successLevel = new BindableProperty<int>(b_level, OnLevelChanged);
            _totalPlayed = new BindableProperty<int>(b_play, OnPlayedChanged);
            _purchasedCount = new BindableProperty<int>(buy_count, OnPurchasedNumChanged);
        }
        
        /// <summary>
        /// 保存数据
        /// </summary>
        /// <param name="force"></param>
        public void Save(bool force = false)
        {
            bool save = force || (Time.realtimeSinceStartup - _lastSavedTime>= SaveInterval);
            if (save)
            {
                _lastSavedTime = Time.realtimeSinceStartup;
                SaveToPlayerPrefs();
            }
        }


        #endregion

        #region 数据绑定变化
        private void OnLevelChanged(int value)
        {
            b_level = value;
            Save();
        }
        private void OnPlayedChanged(int value)
        {
            b_play = value;
            Save();
        }

        private void OnPurchasedNumChanged(int value)
        {
            buy_count = value;
            Save();
        }
        #endregion


        




        


       


    }
    
    







}