using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections.Concurrent;
using System.Reflection;
using System.Threading.Tasks;
using Aitex.Core.Util;
using System.Windows;
using System.Windows.Media;
using System.Windows.Controls;
using System.Windows.Data;
using Aitex.Core.RT.Log;
using Aitex.Core.UI.Control;
using System.Windows.Input;

namespace Aitex.Core.UI.MVVM
{
    /*
     * 要求绑定的格式参考如下方式，命名统一为ElementData，这样才能统一由程序把需要从RT获取的数据项名称自动添加进来
            <my1:AnalogControl Command="{Binding Path=DeviceOperationCommand}" DeviceData="{Binding Path=ElementData[ReactorA.mfcNH3PushH2]  }" Width="54" />
    */
    public class SubscriptionViewModelBase : TimerViewModelBase
    {
        const string BindingPathName = "ElementData";

        protected Func<IEnumerable<string>, Dictionary<string, object>> PollDataFunction;
        protected Action<string[]> InvokeFunction;
        protected Action<string, string> DeviceFunction;
        protected Action<object[]> DeviceControlFunction;

        protected Dictionary<string, Func<string, bool>> PreCommand = new Dictionary<string, Func<string, bool>>();

        ConcurrentBag<string> _subscribedKeys = new ConcurrentBag<string>();

        Func<object, bool> _isSubscriptionAttribute;
        Func<MemberInfo, bool> _hasSubscriptionAttribute;
        

        public ICommand InvokeCommand { get; set; }

        List<DelegateCommand<string>> _lstICommand = new List<DelegateCommand<string>>();

        /// <summary>
        /// 设备名称，设备操作
        /// </summary>
        public ICommand DeviceCommand { get; set; }
        public ICommand DeviceControlCommand { get; set; }

        public SubscriptionViewModelBase(string name)
            : base(name)
        {
            _isSubscriptionAttribute = attribute => attribute is SubscriptionAttribute;
            _hasSubscriptionAttribute = mi => mi.GetCustomAttributes(false).Any(_isSubscriptionAttribute);

            InvokeCommand = new DelegateCommand<string>(param =>{
                InvokeFunction(param.Split(','));
            
            }, functionName => { return true; });

            DeviceCommand = new DelegateCommand<string>(operation => 
            {
                string[] args = operation.Split(',');
                DeviceFunction(args[0], args[1]);
            }, functionName => { return true; });

            DeviceControlCommand = new DelegateCommand<object>(args =>
            {
                DeviceControlFunction((object[])args);
            }, functionName => { return true; });

            TraverseKeys();
        }

        public static string UIKey(string param1, string param2)
        {
            return param1 + "." + param2;
        }
        public static string UIKey(string param1, string param2, string param3)
        {
            return param1 + "." + param2 + "."+param3;
        }
        public static string UIKey(string param1, string param2, string param3, string param4)
        {
            return param1 + "." + param2 + "." + param3 + "."+param4;
        }

        protected override void Poll()
        {
            if (PollDataFunction != null && _subscribedKeys.Count > 0)
            {
                Dictionary<string, object> result = PollDataFunction(_subscribedKeys);

                if (result == null)
                {
                    LOG.Error("获取RT数据失败");
                    return;
                }

                if (result.Count != _subscribedKeys.Count)
                {
                    string unknowKeys = string.Empty;
                    foreach (string key in _subscribedKeys)
                    {
                        if (!result.ContainsKey(key))
                        {
                            unknowKeys += key + "\r\n";
                        }
                    }
                    //if (unknowKeys.Length > 0)
                    //    LOG.Error("UI did not get data element：" + unknowKeys);
                }

                InvokeBeforeUpdateProperty(result);

                UpdateValue(result);
            }
        }

        protected virtual void InvokeBeforeUpdateProperty(Dictionary<string, object> data)
        {

        }

        void UpdateValue(Dictionary<string, object> data)
        {
            if (data == null)
                return;

            Parallel.ForEach(this.GetType().GetProperties().Where(_hasSubscriptionAttribute),
                property =>
                {
                    PropertyInfo pi = (PropertyInfo)property;
                    SubscriptionAttribute subscription = property.GetCustomAttributes(false).First(_isSubscriptionAttribute) as SubscriptionAttribute;
                    string key = subscription.ModuleKey;

                    if (_subscribedKeys.Contains(key) && data.ContainsKey(key))
                    {
                        try
                        {
                            var convertedValue = Convert.ChangeType(data[key], pi.PropertyType);
                            var originValue = Convert.ChangeType(pi.GetValue(this, null), pi.PropertyType);
                            if (originValue != convertedValue)
                            {
                                if (pi.Name == "PumpLimitSetPoint")
                                    pi.SetValue(this, convertedValue, null);
                                else
                                    pi.SetValue(this, convertedValue, null);
                            }
                        }
                        catch (Exception ex)
                        {
                            LOG.Error("由RT返回的数据更新失败" + key, ex);
                            
                        }
                        
                    }
                });

            Parallel.ForEach(this.GetType().GetFields().Where(_hasSubscriptionAttribute),
                property =>
                {
                    FieldInfo pi = (FieldInfo)property;
                    SubscriptionAttribute subscription = property.GetCustomAttributes(false).First(_isSubscriptionAttribute) as SubscriptionAttribute;
                    string key = subscription.ModuleKey;

                    if (_subscribedKeys.Contains(key) && data.ContainsKey(key))
                    {
                        try
                        {
                            var convertedValue = Convert.ChangeType(data[key], pi.FieldType);
                            pi.SetValue(this, convertedValue);
                        }
                        catch (Exception ex)
                        {
                            LOG.Error("由RT返回的数据更新失败" + key, ex);

                        }

                    }
                });
        }

        void TraverseKeys()
        {
            Parallel.ForEach(this.GetType().GetProperties().Where(_hasSubscriptionAttribute),
                property =>
                {
                    SubscriptionAttribute subscription = property.GetCustomAttributes(false).First(_isSubscriptionAttribute) as SubscriptionAttribute;
                    string key = subscription.ModuleKey;
                    if (!_subscribedKeys.Contains(key))
                        _subscribedKeys.Add(key);
                });

            Parallel.ForEach(this.GetType().GetFields().Where(_hasSubscriptionAttribute),
                method =>
                {
                    SubscriptionAttribute subscription = method.GetCustomAttributes(false).First(_isSubscriptionAttribute) as SubscriptionAttribute;
                    string key = subscription.ModuleKey;
                    if (!_subscribedKeys.Contains(key))
                        _subscribedKeys.Add(key);
                });
        }

        void Subscribe(Binding binding, string bindingPathName)
        {
            if (binding != null)
            {
                string path = binding.Path.Path;
                if (path.Contains(bindingPathName) && path.Contains('[') && path.Contains(']'))
                {
                    try
                    {
                        Subscribe(path.Substring(path.IndexOf('[') + 1, path.IndexOf(']') - path.IndexOf('[') - 1));
                    }
                    catch (Exception ex)
                    {
                        LOG.Write(ex);
                    }
                }
            }
        }

        protected void Subscribe(string key)
        {
            if (!string.IsNullOrEmpty(key) )
            {
                 
                _subscribedKeys.Add(key);
            }
        }

        protected void Subscribe(string key, object value)
        {
            if (!string.IsNullOrEmpty(key)  )
            {
 
                _subscribedKeys.Add(key);
            }
        }

    }
}