using System.Collections;
using System.Linq;
using System.Web.Mvc;
using Hiway.Service;

namespace Hiway
{
    public class CodeManager
    {
        private Hashtable _codeStorage;
        private static CodeManager _instance;
        private ICodeLoader codeLoader = new CodeLoader();

        public SelectList CodeSelectList(string cdid)
        {
            return this.CodeSelectList(cdid, "FullCode", null);
        }

        public SelectList CodeSelectList(string cdid, object selectedValue)
        {
            return this.CodeSelectList(cdid, "FullCode", selectedValue);
        }

        public SelectList CodeSelectList(string cdid, string valueField)
        {
            return new SelectList(this.GetCodeList(cdid), valueField, "CodeName");
        }

        public SelectList CodeSelectList(string cdid, string valueField, object selectedValue)
        {
            return new SelectList(this.GetCodeList(cdid), valueField, "CodeName", selectedValue);
        }

        public IList GetCodeList(string cdId)
        {
            IList list = this.CodeStorage[cdId] as IList;
            if (list == null)
            {
                list = this.codeLoader.Load(cdId).ToList<ICode>();
                this.CodeStorage[cdId] = list;
            }
            return list;
        }

        public static void Init(ICodeLoader loader)
        {
            if (_instance == null)
            {
                _instance = new CodeManager();
            }
            _instance.codeLoader = loader;
        }

        public static CodeManager Instance()
        {
            if (_instance == null)
            {
                _instance = new CodeManager();
            }
            return _instance;
        }

        private Hashtable CodeStorage
        {
            get
            {
                if (this._codeStorage == null)
                {
                    this._codeStorage = new Hashtable();
                }
                return this._codeStorage;
            }
            set
            {
                this._codeStorage = value;
            }
        }
    }
}