#region

using System;
using System.Collections.Generic;
using System.Data;
using System.Windows.Forms;
using CSFrameworkV5.Common;
using CSFrameworkV5.Core;

#endregion

namespace CSFrameworkV5.Library.CommonClass
{
    /// <summary>
    ///     快速命令处理程序
    /// </summary>
    public class CommandHandler
    {
        private static List<QuickCommand> _AllCommands = null;

        /// <summary>
        ///     系统定义的所有命令
        /// </summary>
        private static List<QuickCommand> AllCommands
        {
            get
            {
                if (_AllCommands == null)
                {
                    //模拟命令表(从数据库获取)
                    var dt = new DataTable("sys_Commands");
                    dt.Columns.Add("CommandCode",
                        typeof(string)); //命令，如：PO,PO1,PO2,SO,HELP,LK
                    dt.Columns.Add("CommandName",
                        typeof(string)); //命令名称，PO-打开采购订单
                    dt.Columns.Add("CommandType",
                        typeof(string)); //命令类型：OpenForm-打开窗体,Add,Search,Other
                    dt.Columns.Add("FormNamespace", typeof(string)); //窗体的命名空间
                    dt.Columns.Add("MenuName",
                        typeof(string)); //打开此窗体关联的菜单名称（模块主窗体内定义）

                    dt.Rows.Add("PO", "打开采购订单", "OpenForm",
                        "CSFrameworkV5.DemoPurchaseModule.frmPO", "menuItemPO");
                    dt.Rows.Add("PO1", "采购订单-新增", "Add",
                        "CSFrameworkV5.DemoPurchaseModule.frmPO", "menuItemPO");
                    dt.Rows.Add("PO2", "采购订单-搜索", "Search",
                        "CSFrameworkV5.DemoPurchaseModule.frmPO", "menuItemPO");
                    dt.Rows.Add("SO", "打开销售订单", "OpenForm",
                        "CSFrameworkV5.DemoSalesModule.frmSO",
                        "menuSalesOrder");
                    dt.Rows.Add("HELP", "打开帮助文档", "Other", "", "");
                    dt.Rows.Add("LK", "锁定主界面", "Other", "", "");

                    dt.AcceptChanges();

                    //将DataTable转换为对象列表
                    var list = new ModelConverter<QuickCommand>().FillModel(dt);
                    return list;
                }

                return _AllCommands;
            }
        }

        /// <summary>
        ///     执行命令
        /// </summary>
        /// <param name="instance">主窗体实例</param>
        /// <param name="cmdText">命令文本</param>
        /// <returns></returns>
        public static object Execute(IMdiForm instance, string cmdText)
        {
            //匹配命令字符，返回对象实例
            var cmd = AllCommands.Find(delegate(QuickCommand p)
            {
                return p.Match(cmdText);
            });

            if (cmd == null)
                throw new Exception("无效的命令！参考：PO,PO1,PO2,SO,LK,HELP");

            //界面操作通用处理方法
            if (cmd.IsFormAction) return instance.OpenModuleForm(cmd);

            //锁定用户界面命令
            if (cmd.CommandCode == "LK")
                return frmLock.ExecuteLock(instance as Form);

            //打开帮助文档
            if (cmd.CommandCode == "HELP") HelpDoc.HelpAllFile(HelpDoc.CSHelp);

            //
            //其它命令
            //
            return null;
        }
    }

    /// <summary>
    ///     命令类型
    /// </summary>
    public enum QuickCommandType
    {
        OpenForm,
        Add,
        Search,
        Other
    }

    /// <summary>
    ///     命令对象
    /// </summary>
    public class QuickCommand
    {
        public string Action { get; set; }
        public string CommandCode { get; set; }

        public string CommandName { get; set; }

        public string CommandType { get; set; }

        public string FormNamespace { get; set; }

        public bool IsFormAction =>
            CommandType == QuickCommandType.OpenForm.ToStringEx()
            || CommandType == QuickCommandType.Search.ToStringEx()
            || CommandType == QuickCommandType.Add.ToStringEx();

        public string MenuName { get; set; }

        public virtual object Execute(object sender)
        {
            return null;
        }

        public bool Match(string cmdText)
        {
            return CommandCode.ToLower() == cmdText.ToLower();
        }
    }
}