using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Ant.ORM
{
    #region 多表显示字段实体定义

    /// <summary>
    /// 显示字段类
    /// </summary>
    public class MakeShowFields
    {
        
        public Dictionary<string, FieldColumnsList> FieldList = new Dictionary<string, FieldColumnsList>();
        private FieldColumnsList fieldcolumnlist;
        private static object lockHelper = new object();
        private static volatile MakeShowFields instance = null;
        
        public MakeShowFields()
        {
            fieldcolumnlist = new FieldColumnsList();
        }
        public static MakeShowFields Instance
        {
            get
            {
                if (instance == null)
                {
                    lock (lockHelper)
                    {
                        if (instance == null)
                        {
                            instance = new MakeShowFields();
                        }
                    }
                }
                return instance;
            }
        }

        /// <summary>
        /// 设置显示字段所属表
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void SetTableName<T>()
        {
            fieldcolumnlist = new FieldColumnsList();
            fieldcolumnlist.TableName = typeof(T).Name;
        }

        #region IDictionary 成员
        /// <summary>
        /// 向集合中添加元素
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public void Add(Enum filed, string asname)
        {

            FieldColumns colum = new FieldColumns();
            colum.FieldColumn = filed.ToString();
            colum.FieldAsName = asname;
            if (fieldcolumnlist.FieldList.IsNull())
                fieldcolumnlist.FieldList = new List<FieldColumns>();
            fieldcolumnlist.FieldList.Add(colum);
            if (!Contains(fieldcolumnlist.TableName))
                FieldList.Add(fieldcolumnlist.TableName, fieldcolumnlist);
            else
                FieldList[fieldcolumnlist.TableName] = fieldcolumnlist;
        }
        /// <summary>
        /// 向集合中添加元素
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public void Add(params Enum[] fileds)
        {
            foreach(var filed in fileds)
            {
                FieldColumns colum = new FieldColumns();
                colum.FieldColumn = filed.ToString();
                if (fieldcolumnlist.FieldList.IsNull())
                    fieldcolumnlist.FieldList = new List<FieldColumns>();
                fieldcolumnlist.FieldList.Add(colum);
                if (!Contains(fieldcolumnlist.TableName))
                    FieldList.Add(fieldcolumnlist.TableName, fieldcolumnlist);
                else
                {
                    FieldList[fieldcolumnlist.TableName] = fieldcolumnlist;
                }
            }
            
        }

        #region 不用了
        ///// <summary>
        ///// 向集合中添加元素
        ///// </summary>
        ///// <param name="key"></param>
        ///// <param name="value"></param>
        //public void Add(string filed, string asname)
        //{
        //    FieldColumns colum = new FieldColumns();
        //    colum.FieldColumn = filed;
        //    colum.FieldAsName = asname;
        //    if (list.FieldList.IsNull())
        //        list.FieldList = new List<FieldColumns>();
        //    list.FieldList.Add(colum);
        //    if (!Contains(list.TableName))
        //        FieldList.Add(list.TableName, list);
        //    else
        //        FieldList[list.TableName] = list;
        //}

        ///// <summary>
        ///// 向集合中添加元素
        ///// </summary>
        ///// <param name="key"></param>
        ///// <param name="value"></param>
        //public void Add(string filed)
        //{
        //    FieldColumns colum = new FieldColumns();
        //    colum.FieldColumn = filed;
        //    if (list.FieldList.IsNull())
        //        list.FieldList = new List<FieldColumns>();
        //    list.FieldList.Add(colum);
        //    if (!Contains(list.TableName))
        //    {
        //        FieldList.Add(list.TableName, list);
        //    }
        //    else
        //        FieldList[list.TableName] = list;
        //}
        #endregion

        /// <summary>
        /// 移除集合中所有元素
        /// </summary>
        public void Clear()
        {
            FieldList.Clear();
        }
        /// <summary>
        /// 判断集合中是否有该元素
        /// </summary>
        /// <param name="key"></param>
        /// <returns>有返true;没有返回false</returns>
        public bool Contains(string key)
        {
            return FieldList.ContainsKey(key);
        }


        public IDictionaryEnumerator GetEnumerator()
        {
            return FieldList.GetEnumerator();
        }
        /// <summary>
        /// 表
        /// </summary>
       // public string TableName { get; set; }


        public ICollection Keys
        {
            get { return FieldList.Keys; }
        }
        /// <summary>
        /// 移除集合中元素
        /// </summary>
        /// <param name="key"></param>
        public void Remove(string key)
        {
            FieldList.Remove(key);
        }
        /// <summary>
        /// 获取集合中值
        /// </summary>
        public ICollection Values
        {
            get { return FieldList.Values; }
        }

        /// <summary>
        /// 获取key的值
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public FieldColumnsList this[string key]
        {
            get
            {
                if (Contains(key))
                    return FieldList[key];
                else
                    return null;
            }
            set
            {
                if (Contains(key))
                    FieldList[key] = value;
                else
                    FieldList.Add(key, value);
            }
        }

        #endregion

    }


    public class FieldColumnsList
    {
        /// <summary>
        /// 所有显示字段列表
        /// </summary>
        public List<FieldColumns> FieldList
        {
            get;
            set;
        }

        /// <summary>
        /// 表
        /// </summary>
        public string TableName { get; set; }
    }

    public class FieldColumns
    {

        /// <summary>
        /// 列名
        /// </summary>
        public string FieldColumn
        {
            get;
            set;
        }
        /// <summary>
        /// 别名
        /// </summary>
        public string FieldAsName
        {
            get;
            set;
        }
    }

    #endregion
}