using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Text;
using HuizhongLibrary.Data;
using HuizhongLibrary.Log;

namespace HuizhongLibrary
{
    /// <summary>
    /// DataTable扩展
    /// </summary>
    public static class DataTableExtension
    {
        #region DataTable转List
        /// <summary>
        /// DataTable转List
        /// </summary>
        /// <param name="obj">扩展对象</param>
        public static List<T> ToList<T>(this DataTable tb)
        {
            if (tb == null || tb.Rows.Count == 0) return null;
            //获取对象所有属性
            Type t = typeof(T);
            List<T> ListModel = new List<T>();

            PropertyInfo[] propertyInfo = t.GetProperties();
            bool bk = false;
            string json = "";
            if (propertyInfo.Length > 0)
            {
                #region 全部是属性
                for (int i = 0; i < tb.Rows.Count; i++)
                {
                    //创建泛型对象
                    DataRow row = tb.Rows[i];
                    T model = Activator.CreateInstance<T>();
                    for (int j = 0; j < tb.Columns.Count; j++)
                    {
                        foreach (PropertyInfo info in propertyInfo)
                        {
                            //属性名称和列名相同时赋值
                            if (tb.Columns[j].ColumnName.ToUpper().Equals(info.Name.ToUpper()))
                            {
                                bk = SetPropertyValue(model, info, row[j]);
                                if (bk == false)
                                {
                                    json = row.ToJson();
                                    ErrorFollow.TraceWrite("转换错误", "行信息", json);
                                    break;
                                }
                            }
                        }
                    }
                    ListModel.Add(model);
                }
                #endregion
            }
            else
            {
                #region 全部是字段
                FieldInfo[] fieldinfo = t.GetFields();
                for (int i = 0; i < tb.Rows.Count; i++)
                {
                    //创建泛型对象
                    DataRow row = tb.Rows[i];
                    T model = Activator.CreateInstance<T>();
                    for (int j = 0; j < tb.Columns.Count; j++)
                    {
                        foreach (FieldInfo info in fieldinfo)
                        {
                            //属性名称和列名相同时赋值
                            if (tb.Columns[j].ColumnName.ToUpper().Equals(info.Name.ToUpper()))
                            {
                                bk = SetFieldValue(model, info, row[j]);
                                if (bk == false)
                                {
                                    json = row.ToJson();
                                    ErrorFollow.TraceWrite("转换错误", "行信息", json);
                                    break;
                                }
                            }
                        }
                    }
                    ListModel.Add(model);
                }
                #endregion
            }
            return ListModel;
        }
        #endregion
        #region 转换DataRow为Model
        public static T ToModel<T>(this DataRow row)
        {
            //获取对象所有属性
            DataTable tb = row.Table;
            Type t = typeof(T);
            T model = Activator.CreateInstance<T>();
            PropertyInfo[] propertyInfo = t.GetProperties();
            bool bk = false;
            string json = "";
            if (propertyInfo.Length > 0)
            {
                for (int j = 0; j < tb.Columns.Count; j++)
                {
                    foreach (PropertyInfo info in propertyInfo)
                    {
                        //属性名称和列名相同时赋值
                        if (tb.Columns[j].ColumnName.ToUpper().Equals(info.Name.ToUpper()))
                        {
                            bk=SetPropertyValue(model, info, row[j]);
                            if (bk == false)
                            {
                                json = row.ToJson();
                                ErrorFollow.TraceWrite("转换错误", "行信息", json);
                                break;
                            }
                        }
                    }
                }
            }
            else
            {
                FieldInfo[] fieldinfo = t.GetFields();
                for (int j = 0; j < tb.Columns.Count; j++)
                {
                    foreach (FieldInfo info in fieldinfo)
                    {
                        //属性名称和列名相同时赋值
                        if (tb.Columns[j].ColumnName.ToUpper().Equals(info.Name.ToUpper()))
                        {
                            bk=SetFieldValue(model, info, row[j]);
                            if (bk == false)
                            {
                                json = row.ToJson();
                                ErrorFollow.TraceWrite("转换错误", "行信息", json);
                                break;
                            }
                        }
                    }
                }
            }
            return model;
        }
        #endregion
        #region 属性赋值
        public static bool SetPropertyValue<T>(T model,PropertyInfo info,object value)
        {
            if (value == DBNull.Value || value == null)
            {
                info.SetValue(model, null, null);
                return true;
            }
            if (info.PropertyType == typeof(byte[]))
            {
                info.SetValue(model, (byte[])value, null);
                return true;
            }
            string val = Convert.ToString(value);
            if (val == "")
            {
                if (info.PropertyType == typeof(string))
                {
                    info.SetValue(model, Convert.ToString(val), null);
                }
                else
                {
                    info.SetValue(model, null, null);
                }
                return true;
            }
            try
            {
                if (info.PropertyType == typeof(byte) || info.PropertyType == typeof(Nullable<byte>))
                {
                    info.SetValue(model, Convert.ToByte(val), null);
                }
                else if (info.PropertyType == typeof(Int16) || info.PropertyType == typeof(Nullable<Int16>))
                {
                    info.SetValue(model, Convert.ToInt16(val), null);
                }
                else if (info.PropertyType == typeof(int) || info.PropertyType == typeof(Nullable<int>))
                {
                    info.SetValue(model, Convert.ToInt32(val), null);
                }
                else if (info.PropertyType == typeof(Int64) || info.PropertyType == typeof(Nullable<Int64>))
                {
                    info.SetValue(model, Convert.ToInt64(val), null);
                }
                else if (info.PropertyType == typeof(bool) || info.PropertyType == typeof(Nullable<bool>))
                {
                    if (val == "True" || val == "False")
                    {
                        info.SetValue(model, Convert.ToBoolean(val), null);
                    }
                    else
                    {
                        int valbool = Convert.ToInt32(val);
                        info.SetValue(model, Convert.ToBoolean(valbool), null);
                    }               
                }
                else if (info.PropertyType == typeof(decimal) || info.PropertyType == typeof(Nullable<decimal>))
                {
                    info.SetValue(model, Convert.ToDecimal(val), null);
                }
                else if (info.PropertyType == typeof(Double) || info.PropertyType == typeof(Nullable<Double>))
                {
                    info.SetValue(model, Convert.ToDouble(val), null);
                }
                else if (info.PropertyType == typeof(Single) || info.PropertyType == typeof(Nullable<Single>))
                {
                    info.SetValue(model, Convert.ToSingle(val), null);
                }
                else if (info.PropertyType == typeof(DateTime) || info.PropertyType == typeof(Nullable<DateTime>))
                {
                    info.SetValue(model, Convert.ToDateTime(val), null);
                }
                else
                {
                    info.SetValue(model, Convert.ToString(val), null);
                }
                return true;
            }
            catch (Exception ex)
            {
                string str = "列名="+ info.Name+",内容="+ val;
                ErrorFollow.TraceWrite("数据格式转换错误", "", str);
                ErrorFollow.TraceWrite(ex.TargetSite.Name,ex.StackTrace, ex.Message);
            }
            return false;
        }
        #endregion
        #region 字段赋值
        public static bool SetFieldValue<T>(T model, FieldInfo info, object value)
        {
            if (value == DBNull.Value || value == null)
            {
                info.SetValue(model, null);
                return true;
            }
            if (info.FieldType == typeof(byte[]))
            {
                info.SetValue(model, (byte[])value);
                return true;
            }
            string val = Convert.ToString(value);
            if (val == "")
            {
                if (info.FieldType == typeof(string))
                {
                    info.SetValue(model, Convert.ToString(val));
                }
                else
                {
                    info.SetValue(model, null);
                }
                return true;
            }
            try
            {
                if (info.FieldType == typeof(byte) || info.FieldType == typeof(Nullable<byte>))
                {
                    info.SetValue(model, Convert.ToByte(val));
                }
                else if (info.FieldType == typeof(Int16) || info.FieldType == typeof(Nullable<Int16>))
                {
                    info.SetValue(model, Convert.ToInt16(val));
                }
                else if (info.FieldType == typeof(int) || info.FieldType == typeof(Nullable<int>))
                {
                    info.SetValue(model, Convert.ToInt32(val));
                }
                else if (info.FieldType == typeof(Int64) || info.FieldType == typeof(Nullable<Int64>))
                {
                    info.SetValue(model, Convert.ToInt64(val));
                }
                else if (info.FieldType == typeof(bool) || info.FieldType == typeof(Nullable<bool>))
                {
                    if (val == "True" || val == "False")
                    {
                        info.SetValue(model, Convert.ToBoolean(val));
                    }
                    else
                    {
                        int valbool = Convert.ToInt32(val);
                        info.SetValue(model, Convert.ToBoolean(valbool));
                    }
                }
                else if (info.FieldType == typeof(decimal) || info.FieldType == typeof(Nullable<decimal>))
                {
                    info.SetValue(model, Convert.ToDecimal(val));
                }
                else if (info.FieldType == typeof(Double) || info.FieldType == typeof(Nullable<Double>))
                {
                    info.SetValue(model, Convert.ToDouble(val));
                }
                else if (info.FieldType == typeof(Single) || info.FieldType == typeof(Nullable<Single>))
                {
                    info.SetValue(model, Convert.ToSingle(val));
                }
                else if (info.FieldType == typeof(DateTime) || info.FieldType == typeof(Nullable<DateTime>))
                {
                    info.SetValue(model, Convert.ToDateTime(val));
                }
                else
                {
                    info.SetValue(model, Convert.ToString(val));
                }
                return true;
            }
            catch (Exception ex)
            {
                string str = "列名=" + info.Name + ",内容=" + val;
                ErrorFollow.TraceWrite("数据格式转换错误", "", str);
                ErrorFollow.TraceWrite(ex.TargetSite.Name, ex.StackTrace, ex.Message);
            }
            return false;
        }
        #endregion

        #region DataTable转Json
        public static string ToJson(this DataTable tb)
        {
            if (tb.Rows.Count == 0) return "";
            DateTime time = new DateTime(0x7b2, 1, 1, 0, 0, 0, DateTimeKind.Utc);
            long DatetimeMinTimeTicks = time.Ticks;
            string s = "[";
            foreach (DataRow row in tb.Rows)
            {
                string a = "{";
                foreach (DataColumn col in tb.Columns)
                {
                    if (col.ExtendedProperties.Contains("NoJson") == true) continue;
                    if (row.IsNull(col.ColumnName) == true)
                    {
                        a += "\"" + col.ColumnName + "\":null,";
                        continue;
                    }
                    if (col.DataType == typeof(string) || col.DataType == typeof(System.Guid))
                    {
                        string vvv = row[col.ColumnName].ToString();
                        vvv = vvv.Replace("\r\n", "\\r\\n").Replace("\n", "\\n");
                        a += "\"" + col.ColumnName + "\":\"" + vvv + "\",";
                        continue;
                    }
                    if (col.DataType == typeof(DateTime))
                    {
                        DateTime datetime = Convert.ToDateTime(row[col.ColumnName]);
                        a += "\"" + col.ColumnName + "\":\"\\/Date(" + (long)((datetime.ToUniversalTime().Ticks - DatetimeMinTimeTicks) / 0x2710) + ")\\/\",";
                        continue;
                    }
                    if (col.DataType == typeof(bool))
                    {
                        a += "\"" + col.ColumnName + "\":" + row[col.ColumnName].ToString().ToLower() + ",";
                        continue;
                    }
                    if (col.DataType == typeof(Int64))
                    {
                        a += "\"" + col.ColumnName + "\":\"" + row[col.ColumnName] + "\",";
                        continue;
                    }
                    if (col.DataType == typeof(decimal))
                    {

                        a += "\"" + col.ColumnName + "\":" + Convert.ToDecimal(row[col.ColumnName]).ToString("0.#########") + ",";
                        continue;
                    }
                    if (col.DataType == typeof(Int32) || col.DataType == typeof(Int16) || col.DataType == typeof(float) || col.DataType == typeof(short))
                    {
                        a += "\"" + col.ColumnName + "\":" + row[col.ColumnName] + ",";
                        continue;
                    }
                }
                a = a.Remove(a.Length - 1);
                a += "},";
                s += a;
            }
            s = s.Remove(s.Length - 1);
            s += "]";
            return s;
        }
        #endregion
        #region 转换DataRow为Json
        public static string ToJson(this DataRow row)
        {
            DateTime time = new DateTime(0x7b2, 1, 1, 0, 0, 0, DateTimeKind.Utc);
            long DatetimeMinTimeTicks = time.Ticks;
            string a = "{";
            foreach (DataColumn col in row.Table.Columns)
            {
                if (col.ExtendedProperties.Contains("NoJson") == true) continue;
                if (row.IsNull(col.ColumnName) == true)
                {
                    a += "\"" + col.ColumnName + "\":null,";
                    continue;
                }
                if (col.DataType == typeof(string) || col.DataType == typeof(System.Guid))
                {
                    string vvv = row[col.ColumnName].ToString();
                    vvv = vvv.Replace("\r\n", "\\r\\n").Replace("\n", "\\n");
                    a += "\"" + col.ColumnName + "\":\"" + vvv + "\",";
                    continue;
                }
                if (col.DataType == typeof(DateTime))
                {
                    DateTime datetime = Convert.ToDateTime(row[col.ColumnName]);
                    a += "\"" + col.ColumnName + "\":\"\\/Date(" + (long)((datetime.ToUniversalTime().Ticks - DatetimeMinTimeTicks) / 0x2710) + ")\\/\",";
                    continue;
                }
                if (col.DataType == typeof(bool))
                {
                    a += "\"" + col.ColumnName + "\":" + row[col.ColumnName].ToString().ToLower() + ",";
                    continue;
                }
                if (col.DataType == typeof(Int64))
                {
                    a += "\"" + col.ColumnName + "\":\"" + row[col.ColumnName] + "\",";
                    continue;
                }
                if (col.DataType == typeof(decimal))
                {
                    a += "\"" + col.ColumnName + "\":" + Convert.ToDecimal(row[col.ColumnName]).ToString("0.#########") + ",";
                    continue;
                }
                if (col.DataType == typeof(Int32) || col.DataType == typeof(Int16) || col.DataType == typeof(float) || col.DataType == typeof(short))
                {
                    a += "\"" + col.ColumnName + "\":" + row[col.ColumnName] + ",";
                    continue;
                }
            }
            a = a.Remove(a.Length - 1);
            a += "}";
            return a;
        }
        #endregion

        #region DataTable转JavaDataTable
        public static JavaDataTable ToJavaDataTable(this DataTable tb)
        {
            var tb2 = new JavaDataTable();
            foreach (DataColumn item in tb.Columns)
            {
                tb2.Columns.Add(new JavaDataTableColumn { ColumnName = item.ColumnName });
            }
            foreach (DataRow item in tb.Rows)
            {
                var row = new JavaDataTableRow();
                row.ItemArray = item.ItemArray.ToList<object>();
                tb2.Rows.Add(row);
            }
            return tb2;
        }
        #endregion

    }


}