using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using WCS.Core.DataTrans;
using WCS.Entity;

namespace WCS.Core
{
    public static class Extentions
    {
        //public static PlcDB Regist(this IPlcConn plc, ushort dbNo, ushort length)
        //{
        //    var plc= new PlcDB(plc, dbNo, length);
        //}

        #region GetData

        public static byte[] GetData(this bool value)
        {
            return BitConverter.GetBytes(value);
        }

        public static byte[] GetData(this byte value)
        {
            return new byte[] { value };
        }

        public static byte[] GetData(this char value)
        {
            return BitConverter.GetBytes(value);
        }

        public static byte[] GetData(this short value)
        {
            return BitConverter.GetBytes(value);
        }

        public static byte[] GetData(this ushort value)
        {
            return BitConverter.GetBytes(value);
        }

        public static byte[] GetData(this int value)
        {
            return BitConverter.GetBytes(value);
        }

        public static byte[] GetData(this uint value)
        {
            return BitConverter.GetBytes(value);
        }

        public static byte[] GetData(this long value)
        {
            return BitConverter.GetBytes(value);
        }

        public static byte[] GetData(this ulong value)
        {
            return BitConverter.GetBytes(value);
        }

        internal static Encoding enCoding = Encoding.GetEncoding("gb2312");

        private static Dictionary<Type, MethodInfo> ToBytesMethods = new Dictionary<Type, MethodInfo>();

        private static byte[] GetPrimitiveData(object obj)
        {
            try
            {
                var t = obj.GetType();
                if (t == typeof(byte))
                    return new byte[] { (byte)obj };
                MethodInfo mi;
                lock (ToBytesMethods)
                {
                    if (!ToBytesMethods.TryGetValue(t, out mi))
                    {
                        var ms = typeof(BitConverter).GetMethods(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static);
                        ms = ms.Where(v => v.Name == "GetBytes").ToArray();
                        mi = ms.FirstOrDefault(v => v.GetParameters()[0].ParameterType == t);
                        ToBytesMethods.Add(t, mi);
                    }
                }
                var res = mi.Invoke(null, new object[] { obj }) as byte[];
                //if (!BitConverter.IsLittleEndian)
                {
                    res = res.Reverse().ToArray();
                }
                return res;
            }
            catch (Exception)
            {
                throw;
            }
        }

        public static byte[] GetData(this object obj, byte dataSize = 0)
        {
            var type = obj.GetType();
            System.IO.MemoryStream st = new System.IO.MemoryStream();
            if (type.IsArray)
            {
                foreach (var o in obj as Array)
                {
                    var data = GetData(o);
                    st.Write(data, 0, data.Length);
                }
            }
            else
            {
                if (type == typeof(string))
                {
                    var data = enCoding.GetBytes(obj.ToString());
                    st.WriteByte(dataSize);
                    st.WriteByte((byte)data.Length);
                    st.Write(data, 0, data.Length);
                }
                else
                {
                    var data = GetPrimitiveData(obj);
                    st.Write(data, 0, data.Length);
                }
            }
            return st.ToArray();
        }

        #endregion GetData

        /// <summary>
        /// 转换基元类型或者String
        /// </summary>
        /// <param name="data"></param>
        /// <param name="type">类型为基元类型或者String</param>
        /// <returns></returns>
        public static object GetObj(this byte[] data, Type type)
        {
            if (type == typeof(string))
            {
                var len = data.Skip(1).First();
                var bytes = data.Skip(2).Take(len).ToArray();
                return Configs.StringEncoding.GetString(bytes);
            }
            else
            {
                if (type.IsEnum)
                    type = type.GetEnumUnderlyingType();
                data = data.Reverse().ToArray();
                if (type == typeof(bool))
                {
                    return BitConverter.ToBoolean(data, 0);
                }
                else if (type == typeof(char))
                {
                    return BitConverter.ToChar(data, 0);
                }
                else if (type == typeof(byte))
                {
                    return data.First();
                }
                else if (type == typeof(short))
                {
                    return BitConverter.ToInt16(data, 0);
                }
                else if (type == typeof(ushort))
                {
                    return BitConverter.ToUInt16(data, 0);
                }
                else if (type == typeof(int))
                {
                    return BitConverter.ToInt32(data, 0);
                }
                else if (type == typeof(uint))
                {
                    return BitConverter.ToUInt32(data, 0);
                }
                else if (type == typeof(long))
                {
                    return BitConverter.ToInt64(data, 0);
                }
                else if (type == typeof(ulong))
                {
                    return BitConverter.ToUInt64(data, 0);
                }
                else
                {
                    throw new Exception("类型不支持");
                }
            }
        }

        /// <summary>
        /// 转换基元类型或者String
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="data"></param>
        /// <returns></returns>
        public static T GetObj<T>(this byte[] data)
        {
            return (T)data.GetObj(typeof(T));
        }

        /// <summary>
        /// 转换基元类型或者String,或数组
        /// </summary>
        /// <param name="data"></param>
        /// <param name="type"></param>
        /// <param name="datasize">String长度</param>
        /// <returns></returns>
        public static object GetObj(this byte[] data, Type type, byte datasize)
        {
            if (type.IsArray)
            {
                var t = type.GetElementType();
                var lsttype = typeof(List<>).MakeGenericType(t);
                var lst = Activator.CreateInstance(lsttype) as System.Collections.IList;
                var i = 0;

                if (t == typeof(bool))
                    datasize = 1;
                else
                    datasize = (byte)Marshal.SizeOf(t);

                while (i < data.Length)
                {
                    var obj = GetObj(data.Skip(i).Take(datasize).ToArray(), t, datasize);
                    lst.Add(obj);
                    i += datasize;
                }
                var array = Array.CreateInstance(t, lst.Count) as Array;
                lst.CopyTo(array, 0);
                return array;
            }
            else
                return data.GetObj(type);
        }

        /// <summary>
        /// 转换基元类型或者String,或数组
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="data"></param>
        /// <param name="datasize">String长度</param>
        /// <returns></returns>
        public static T GetObj<T>(this byte[] data, byte datasize = 0)
        {
            return (T)data.GetObj(typeof(T), datasize);
        }
    }

    public static class BitExtension
    {
        #region ushort

        /// <summary>
        /// 设置指定位置的位值的值
        /// </summary>
        /// <param name="value">ushort对象</param>
        /// <param name="position">指定位置</param>
        /// <param name="flag">值</param>
        /// <returns></returns>
        public static ushort SetBit(this ushort value, int position, bool flag)
        {
            return SetBits(value, position, 1, flag ? (byte)1 : (byte)0);
        }

        /// <summary>
        /// 批量设置指定位置的位值的值
        /// </summary>
        /// <param name="value">ushort对象</param>
        /// <param name="position">开始位置</param>
        /// <param name="length">长度</param>
        /// <param name="bits">值</param>
        /// <returns></returns>
        public static ushort SetBits(this ushort value, int position, int length, ushort bits)
        {
            if (length <= 0 || position >= 16) return value;

            var mask = (2 << (length - 1)) - 1;

            value &= (ushort)~(mask << position);
            value |= (ushort)((bits & mask) << position);

            return value;
        }

        /// <summary>
        /// 获取指定位置的值
        /// </summary>
        /// <param name="value">ushort对象</param>
        /// <param name="position">指定位置</param>
        /// <returns></returns>
        public static bool GetBit(this ushort value, int position)
        {
            return GetBits(value, position, 1) == 1;
        }

        /// <summary>
        /// 批量获取指定位置的值
        /// </summary>
        /// <param name="value">ushort对象</param>
        /// <param name="position">开始位值</param>
        /// <param name="length">长度</param>
        /// <returns></returns>
        public static ushort GetBits(this ushort value, int position, int length)
        {
            if (length <= 0 || position >= 16) return 0;

            var mask = (2 << (length - 1)) - 1;

            return (ushort)((value >> position) & mask);
        }

        #endregion ushort

        #region byte

        /// <summary>
        /// 设置指定位置的值
        /// </summary>
        /// <param name="value">byte对象</param>
        /// <param name="position">指定位置</param>
        /// <param name="flag">设置值</param>
        /// <returns></returns>
        public static byte SetBit(this byte value, int position, bool flag)
        {
            if (position >= 8) return value;

            var mask = (2 << (1 - 1)) - 1;

            value &= (byte)~(mask << position);
            value |= (byte)(((flag ? 1 : 0) & mask) << position);

            return value;
        }

        /// <summary>
        /// 获取指定位置的值
        /// </summary>
        /// <param name="value">byte对象</param>
        /// <param name="position">指定位置</param>
        /// <returns></returns>
        public static bool GetBit(this byte value, int position)
        {
            if (position >= 8) return false;

            var mask = (2 << (1 - 1)) - 1;

            return (byte)((value >> position) & mask) == 1;
        }

        #endregion byte

        #region uint

        /// <summary>
        /// 设置指定位置的位值的值
        /// </summary>
        /// <param name="value">uint对象</param>
        /// <param name="position">指定位置</param>
        /// <param name="flag">值</param>
        /// <returns></returns>
        public static uint SetBit(this uint value, int position, bool flag)
        {
            return SetBits(value, position, 1, flag ? (byte)1 : (byte)0);
        }

        /// <summary>
        /// 批量设置指定位置的位值的值
        /// </summary>
        /// <param name="value">uint对象</param>
        /// <param name="position">开始位置</param>
        /// <param name="length">长度</param>
        /// <param name="bits">值</param>
        /// <returns></returns>
        public static uint SetBits(this uint value, int position, int length, uint bits)
        {
            if (length <= 0 || position >= 32) return value;

            var mask = (2 << (length - 1)) - 1;

            value &= (uint)~(mask << position);
            value |= (uint)((bits & mask) << position);

            return value;
        }

        /// <summary>
        /// 获取指定位置的值
        /// </summary>
        /// <param name="value">uint对象</param>
        /// <param name="position">指定位置</param>
        /// <returns></returns>
        public static bool GetBit(this uint value, int position)
        {
            return GetBits(value, position, 1) == 1;
        }

        /// <summary>
        /// 批量获取指定位置的值
        /// </summary>
        /// <param name="value">uint对象</param>
        /// <param name="position">开始位值</param>
        /// <param name="length">长度</param>
        /// <returns></returns>
        public static uint GetBits(this uint value, int position, int length)
        {
            if (length <= 0 || position >= 32) return 0;

            var mask = (2 << (length - 1)) - 1;

            return (uint)((value >> position) & mask);
        }

        #endregion uint

        #region ulong

        /// <summary>
        /// 设置指定位置的位值的值
        /// </summary>
        /// <param name="value">ulong对象</param>
        /// <param name="position">指定位置</param>
        /// <param name="flag">值</param>
        /// <returns></returns>
        public static ulong SetBit(this ulong value, int position, bool flag)
        {
            return SetBits(value, position, 1, flag ? (byte)1 : (byte)0);
        }

        /// <summary>
        /// 批量设置指定位置的位值的值
        /// </summary>
        /// <param name="value">ulong对象</param>
        /// <param name="position">开始位置</param>
        /// <param name="length">长度</param>
        /// <param name="bits">值</param>
        /// <returns></returns>
        public static ulong SetBits(this ulong value, int position, int length, ulong bits)
        {
            if (length <= 0 || position >= 64) return value;

            var mask = (ulong)(2 << (length - 1)) - 1;

            value &= ~(mask << position);
            value |= (bits & mask) << position;

            return value;
        }

        /// <summary>
        /// 获取指定位置的值
        /// </summary>
        /// <param name="value">ulong对象</param>
        /// <param name="position">指定位置</param>
        /// <returns></returns>
        public static bool GetBit(this ulong value, int position)
        {
            return GetBits(value, position, 1) == 1;
        }

        /// <summary>
        /// 批量获取指定位置的值
        /// </summary>
        /// <param name="value">ulong对象</param>
        /// <param name="position">开始位值</param>
        /// <param name="length">长度</param>
        /// <returns></returns>
        public static ulong GetBits(this ulong value, int position, int length)
        {
            if (length <= 0 || position >= 64) return 0;

            var mask = (ulong)(2 << (length - 1)) - 1;

            return (value >> position) & mask;
        }

        #endregion ulong
    }

    public static class Extensions
    {
        private static ConcurrentDictionary<WCS_DEVICEPROTOCOL, object> Datas = new ConcurrentDictionary<WCS_DEVICEPROTOCOL, object>();

        private static ConcurrentDictionary<object, object> ExObjs = new ConcurrentDictionary<object, object>();

        public static T Data<T>(this WCS_DEVICEPROTOCOL obj)
        {
            return (T)Data(obj);
        }

        public static object Data(this WCS_DEVICEPROTOCOL obj)
        {
            if (!Datas.ContainsKey(obj))
            {
                var type = typeof(Generator<,>);
                type = type.MakeGenericType(obj.DB.GetProtocolType(), Configs.ProtocolProxyBaseType);
                var m = type.GetMethod("Create", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static);
                Datas[obj] = m.Invoke(null, new object[] { new object[] { obj.DEVICE.CODE.ToString(), obj.DB, (ushort)obj.POSITION, obj } });
            }
            return Datas[obj];
        }

        //public static WCS_DEVICE Device(this IDATA obj)
        //{
        //    return (obj as PLCData).Device;
        //}

        public static T GetEx<T>(object entity)
        {
            if (!ExObjs.ContainsKey(entity))
            {
                var obj = Activator.CreateInstance(typeof(T), entity);
                ExObjs[entity] = obj;
            }
            return (T)ExObjs[entity];
        }

        public static DataBlock Ex(this WCS_DATABLOCK source)
        {
            return GetEx<DataBlock>(source);
        }

        public static PlcAccessor Ex(this WCS_PLC source)
        {
            return GetEx<PlcAccessor>(source);
        }

        public static WCS_DEVICEPROTOCOL PROTOCOL(this IProtocol obj)
        {
            return (obj as ProtocolProxyBase).Protocol;
        }

        public static T Create<T>(this WCS_DEVICE source)
        {
            return (T)Activator.CreateInstance(typeof(T), source);
        }

        public static Device<T> Device<T>(this WCS_DEVICE source) where T : IProtocol
        {
            var res = (Device<T>)Activator.CreateInstance(typeof(Device<T>), source);
            return res;
        }

        public static Device<T, T2> Device<T, T2>(this WCS_DEVICE source) where T : IProtocol where T2 : IProtocol
        {
            return (Device<T, T2>)Activator.CreateInstance(typeof(Device<T, T2>), source);
        }

        public static Device<T, T2, T3> Device<T, T2, T3>(this WCS_DEVICE source) where T : IProtocol where T2 : IProtocol where T3 : IProtocol
        {
            return (Device<T, T2, T3>)Activator.CreateInstance(typeof(Device<T, T2, T3>), source);
        }

        public static DeviceGroup<T> DeviceGroup<T>(this WCS_DEVICE source) where T : IProtocol
        {
            return (DeviceGroup<T>)Activator.CreateInstance(typeof(DeviceGroup<T>), source);
        }

        public static DeviceGroup<T, T2> DeviceGroup<T, T2>(this WCS_DEVICE source) where T : IProtocol where T2 : IProtocol
        {
            return (DeviceGroup<T, T2>)Activator.CreateInstance(typeof(DeviceGroup<T, T2>), source);
        }

        public static DeviceGroup<T, T2, T3> DeviceGroup<T, T2, T3>(this WCS_DEVICE source) where T : IProtocol where T2 : IProtocol where T3 : IProtocol
        {
            return (DeviceGroup<T, T2, T3>)Activator.CreateInstance(typeof(DeviceGroup<T, T2, T3>), source);
        }

        public static DateTime GetUpdateTime(this IProtocol source)
        {
            dynamic obj = source;
            return obj.UpdateTime;
        }
    }
}