#region

using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Windows.Forms;
using CSFrameworkV5.Core;

#endregion

namespace CSFrameworkV5.Language
{
    public class LanTool
    {
        //不设置语言的组件（.NET组件）
        private const string WITHOUT_CONTROLS_NET =
            "TextBox,PictureBox,ImageList,ContextMenuStrip,MenuStrip,";

        //不设置语言的组件（Dev组件）
        private const string WITHOUT_CONTROLS_DEV =
            "TextEdit,DateEdit,PictureEdit,ComboBoxEdit,LookUpEdit,ImageListBoxControl,GridControl,PanelControl,GroupControl,TableLayoutPanel,SplitterControl,TreeList,BarDockControl,DockPanel,XtraTabControl,TreeView,";

        /// <summary>
        ///     获取控件或组件的显示文本，如：.Text,.Caption属性的值
        /// </summary>
        /// <param name="ctrl"></param>
        /// <returns></returns>
        private static string GetControlText(object ctrl)
        {
            var type = ctrl.GetType();
            var pinfo =
                type.GetProperties(BindingFlags.Instance | BindingFlags.Public);
            foreach (var info in pinfo)
                if (info.Name.ToUpper() == "TEXT" ||
                    info.Name.ToUpper() == "CAPTION")
                {
                    var o = info.GetValue(ctrl, null);
                    return o == null ? "" : o.ToStringEx();
                }

            return string.Empty;
        }

        /// <summary>
        ///     判断控件是否可以设置多语言
        /// </summary>
        /// <param name="ctrl"></param>
        /// <returns></returns>
        private static bool IsLanguageControl(object ctrl)
        {
            if ((ctrl != null && ctrl is Control) || ctrl is Component)
            {
                var type = ctrl.GetType();
                var pinfo =
                    type.GetProperties(BindingFlags.Instance |
                                       BindingFlags.Public);
                foreach (var info in pinfo)
                    if (info.Name.ToUpper() == "TEXT" ||
                        info.Name.ToUpper() == "CAPTION")
                        return true;
            }

            return false;
        }

        /// <summary>
        ///     判断当前组件是否需要设置语言
        /// </summary>
        /// <param name="ctrl"></param>
        /// <returns></returns>
        private static bool IsWithoutControl(object ctrl)
        {
            if (ctrl == null) return false;

            var name = ctrl.GetType().FullName.ToLower() + ".";
            var withouts =
                (WITHOUT_CONTROLS_NET + "," + WITHOUT_CONTROLS_DEV + ",")
                .ToLower();
            var exists = withouts.Split(',')
                .Where(e => name.IndexOf("." + e + ".") >= 0).FirstOrDefault();
            return !string.IsNullOrWhiteSpace(exists);
        }

        /// <summary>
        ///     设置控件或组件的显示文本，如：.Text,.Caption属性的值
        /// </summary>
        /// <param name="ctrl"></param>
        /// <returns></returns>
        private static bool SetControlText(object ctrl, string text)
        {
            var type = ctrl.GetType();
            var pinfo =
                type.GetProperties(BindingFlags.Instance | BindingFlags.Public);
            foreach (var info in pinfo)
                if (info.Name.ToUpper() == "TEXT" ||
                    info.Name.ToUpper() == "CAPTION")
                {
                    //若设置值报错，请添加此控件类型到常量定义：WITHOUT_CONTROLS_DEV,WITHOUT_CONTROLS_NET
                    info.SetValue(ctrl, text, null);
                    return true;
                }

            return false;
        }

        /// <summary>
        ///     设置窗体的语言，枚举窗体的成员，字段设置语言
        /// </summary>
        /// <param name="form"></param>
        public static void SetLanguage(Form form)
        {
            var mType = form.GetType();

            var fields = mType.GetFields(
                BindingFlags.Instance | /*为了获取返回值，必须指定 BindingFlags.Instance*/
                BindingFlags.DeclaredOnly |
                BindingFlags.NonPublic | /*获取窗体上拖放的控件Private*/
                BindingFlags.Public |
                BindingFlags.CreateInstance);

            string lan;
            string id;
            string defaultText;
            object ctrl;

            for (var i = 0; i < fields.Length; i++)
            {
                ctrl = fields[i].GetValue(form); //根据类型取组件对象
                if (ctrl == null) continue;

                //仅自动处理控件、组件的多语言
                if (IsLanguageControl(ctrl) == false) continue;

                if (IsWithoutControl(ctrl)) continue;

                //注意：窗体中组件的语言标识必须是【窗体的命名空间】+【组件名称】
                id = mType.FullName + "." + fields[i].Name;
                defaultText = GetControlText(ctrl); //获取控件或组件的显示文本
                lan = LanLib.Get(LanLib.Current, id, defaultText); //获取语言库资料

                //设置语言
                if (lan != defaultText && !string.IsNullOrWhiteSpace(lan))
                    SetControlText(ctrl, lan);
            }
        }
    }
}