using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace GpsCardGatewayPosition.Model.Context
{
    public abstract class ContextBase
    {
        /// <summary>
        /// 反序列化 将 属性名:属性值 AND 属性名=属性值 字符串反序列化为对象
        /// </summary>
        /// <param name="val"></param>
        public void Deserlize(string val)
        {
            if (string.IsNullOrEmpty(val)) return;
            var items = val.Split(new[] { '&' }, StringSplitOptions.RemoveEmptyEntries);
            foreach (var item in items)
            {
                var kv = item.Split('=');
                if (kv.Length == 2)
                    SetValue(this, kv[0], kv[1]);
            }
        }
        /// <summary>
        /// 重写 ToString 方法，将所有属性拼接成 属性名=属性值 AND 属性名=属性值 格式的字符串
        /// </summary>
        /// <returns></returns>
        public override string ToString()
        {
            var tStr = string.Empty;
            var properties = GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public);
            foreach (var item in properties)
            {
                var name = item.Name;
                var value = item.GetValue(this, null);
                if (value != null)
                {
                    if (item.PropertyType.IsValueType || item.PropertyType.Name.StartsWith("String"))
                    {
                        // Skipped insecurity
                        tStr += string.Format("{0}={1}&", name, value);
                    }
                }
            }
            return tStr.TrimEnd('&').ToLower();
        }

        /// <summary>
        /// 类型匹配
        /// </summary>
        /// <param name="type"></param>
        /// <param name="typeName"></param>
        /// <returns></returns>
        public static bool IsType(Type type, string typeName)
        {
            if (type.ToString() == typeName)
                return true;
            return type.ToString() != "System.Object" && IsType(type.BaseType, typeName);
        }


        /// <summary>
        /// 给类的属性设置值
        /// </summary>
        /// <param name="entity"></param>
        /// <param name="fieldName"></param>
        /// <param name="fieldValue"></param>
        public static void SetValue(object entity, string fieldName, string fieldValue)
        {
            var entityType = entity.GetType();

            var propertyInfo = entityType.GetProperty(fieldName, BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);

            if (propertyInfo == null) return;

            if (IsType(propertyInfo.PropertyType, "System.String"))
            {
                propertyInfo.SetValue(entity, fieldValue, null);

            }

            if (IsType(propertyInfo.PropertyType, "System.Boolean"))
            {
                propertyInfo.SetValue(entity, Boolean.Parse(fieldValue), null);

            }

            if (IsType(propertyInfo.PropertyType, "System.Nullable`1[System.Boolean]"))
            {
                propertyInfo.SetValue(entity, fieldValue != "" && Boolean.Parse(fieldValue), null);
            }

            if (IsType(propertyInfo.PropertyType, "System.Int32"))
            {
                propertyInfo.SetValue(entity, fieldValue != "" ? int.Parse(fieldValue) : 0, null);
            }

            if (IsType(propertyInfo.PropertyType, "System.Nullable`1[System.Int32]"))
            {
                propertyInfo.SetValue(entity, fieldValue != "" ? int.Parse(fieldValue) : 0, null);
            }

            if (IsType(propertyInfo.PropertyType, "System.Decimal"))
            {
                try
                {
                    propertyInfo.SetValue(entity, fieldValue != "" ? Decimal.Parse(fieldValue) : new Decimal(0), null);
                }
                catch (Exception)
                {
                    propertyInfo.SetValue(entity, new Decimal(0), null);
                }
            }

            if (IsType(propertyInfo.PropertyType, "System.Nullable`1[System.DateTime]"))
            {
                if (fieldValue != "")
                {
                    try
                    {
                        propertyInfo.SetValue(
                            entity,
                            (DateTime?)DateTime.ParseExact(fieldValue, "yyyy-MM-dd HH:mm:ss", null), null);
                    }
                    catch
                    {
                        propertyInfo.SetValue(entity, (DateTime?)DateTime.ParseExact(fieldValue, "yyyy-MM-dd", null), null);
                    }
                }
                else
                    propertyInfo.SetValue(entity, null, null);

            }

        }
    }
}