using MuchInfo.Localization.Languages;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Resources;
using System.Windows;

namespace MuchInfo.Localization
{
    /// <summary>
    /// APLangIndexer，语言资源索引器。
    /// </summary>
    public class APLangIndexer : INotifyPropertyChanged
    {
        static APLangIndexer()
        {
            //TODO:初始化语言资源
            var Rlt = new List<APLangType>();
            Rlt.Add(new APLangType()
            {
                LangTypeAbbre = "zh_CN",
                Title = "简体中文",
                ResxClass = typeof(zh_CN),
                ResxManger = zh_CN.ResourceManager,
                ExtLangModelList = new List<ExtLangModel>()
            });
            Rlt.Add(new APLangType()
            {
                LangTypeAbbre = "en-US",
                Title = "English",
                ResxClass = typeof(en_US),
                ResxManger = en_US.ResourceManager,
                ExtLangModelList = new List<ExtLangModel>()
            });
            Rlt.Add(new APLangType()
            {
                LangTypeAbbre = "zh_TW",
                Title = "繁體中文",
                ResxClass = typeof(zh_TW),
                ResxManger = zh_TW.ResourceManager,
                ExtLangModelList = new List<ExtLangModel>()
            });
            _LangTypeList = Rlt;
        }

        /// <summary>
        /// 默认的语言列表。
        /// </summary>
        /// <returns></returns>
        public static List<APLangType> LangTypeList { get { return _LangTypeList; } }
        private static List<APLangType> _LangTypeList = null;

        /// <summary>
        /// LangType，当前语言类型。
        /// </summary>
        public APLangType LangType
        {
            get { return _LangType; }
            set
            {
                _LangType = value;
                RaisePropertyChanged("APLangIndexer");
                RaisePropertyChanged(string.Empty);
            }
        }
        private APLangType _LangType = LangTypeList[0];

        /// <summary>
        /// 语言资源索引。
        /// </summary>
        /// <param name="ResKey"></param>
        /// <returns></returns>
        public string this[string ResKey]
        {
            get
            {
                var Rlt = "";
                var NullRlt = "APConfig_Error";

                //TODO:1、现在拓展语言资源找此关键字的语言资源
                if (string.IsNullOrEmpty(Rlt))
                {
                    if (this.LangType.ExtLangModelList != null && this.LangType.ExtLangModelList.Where(x => x.Key == ResKey).Count() > 0)
                    {
                        Rlt = this.LangType.ExtLangModelList.First(x => x.Key == ResKey).Value;
                    }
                }

                //TODO:如果没有找到，则在资源文件查找
                if (string.IsNullOrEmpty(Rlt))
                {
                    var BdFlag = BindingFlags.Static | BindingFlags.Public | BindingFlags.IgnoreCase;
                    var Props = this.LangType.ResxClass.GetProperties(BdFlag);
                    var Prop = Props.First(x => x.Name.Trim().ToUpper() == ResKey.Trim().ToUpper());
                    if (Prop != null)
                    {
                        try
                        {
                            Rlt = Prop.GetValue(null, null) + "";
                        }
                        catch { ;}
                    }
                }

                return Rlt == "" ? this[NullRlt] : Rlt;
            }
        }

        /// <summary>
        /// PropertyChanged，属性值发生变化事件。
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;

        /// <summary>
        /// 引发属性值发生变化事件
        /// </summary>
        /// <param name="PropertyName"></param>
        public void RaisePropertyChanged(string PropertyName)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(PropertyName));
            }
        }
    }

    /// <summary>
    /// APLangType，语言类型定义。
    /// </summary>
    public class APLangType : DependencyObject
    {
        /// <summary>
        /// 语言类型简称
        /// </summary>
        public string LangTypeAbbre { get; set; }

        /// <summary>
        /// 语言标题
        /// </summary>
        public string Title { get; set; }

        /// <summary>
        /// 资源类型
        /// </summary>
        public Type ResxClass { get; set; }

        /// <summary>
        ///  资源
        /// </summary>
        public ResourceManager ResxManger
        {
            get { return (ResourceManager)GetValue(ResxMangerProperty); }
            set { SetValue(ResxMangerProperty, value); }
        }
        public static readonly DependencyProperty ResxMangerProperty =
            DependencyProperty.Register("ResxManger", typeof(ResourceManager),
            typeof(APLangType), new PropertyMetadata(null));

        /// <summary>
        /// 拓展语言资源
        /// </summary>
        public List<ExtLangModel> ExtLangModelList { get; set; }
    }

    /// <summary>
    /// ExtLangModel,拓展语言资源
    /// </summary>
    public class ExtLangModel
    {
        /// <summary>
        /// Key,关键字
        /// </summary>
        public string Key { get; set; }

        /// <summary>
        /// Value,值
        /// </summary>
        public string Value { get; set; }

    }
}