using System;
using System.Reflection;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
using System.Web;
using QMAPP.Common.Web.Models;
using QMAPP.Common.Web.Controllers;

namespace QMAPP.Common.Web.Util
{
    /// <summary>
    /// 程序管理工具
    /// </summary>
    public class ProgramHelper
    {
        #region 获取查询模块对应ViewModel类型

        /// <summary>
        /// 获取查询模块对应ViewModel类型
        /// </summary>
        /// <param name="programName">程序名</param>
        /// <returns>ViewModel类型</returns>
        public Type GetProgramVMType(string programName)
        {
            string prgListName = System.Web.HttpContext.Current.Server.MapPath(HttpRuntime.AppDomainAppVirtualPath) + "App_Data\\ProgramList.xml";
            string viewModel = "";
            try
            {
                XElement xel = XElement.Load(prgListName);

                var datas = from x in xel.Descendants("Program")
                            select x;

                foreach (XElement d in datas)
                {
                    if (d.Attribute("ProgramName").Value == programName)
                    {
                        viewModel = d.Attribute("ViewModel").Value;
                        break;
                    }
                   
                }

                if (viewModel == "")
                {
                    throw new Exception("未对该程序模块进行相应配置。");
                }

                
                //提取程序集信息
                datas = from x in xel.Descendants("AssemblyInfo")
                            select x;
                string assemblyFile = "";
                if (datas!=null)
                {
                    foreach (XElement d in datas)
                    {
                        assemblyFile = d.Attribute("AssemblyFile").Value;
                    }
                }

                Assembly asse = Assembly.LoadFile(QController.PhysicsRootPath + @"bin\" + assemblyFile);
                Type t = asse.GetType(viewModel);
                return t;
            }
            catch (Exception ex)
            {
                throw new Exception("未对该程序模块进行相应配置。");
            }
        }

        #endregion

        #region 获取查询条件定义

        /// <summary>
        /// 获取查询模块对应ViewModel类型
        /// </summary>
        /// <param name="programName">程序名</param>
        /// <returns>ViewModel类型</returns>
        public string GetProgramWhereList(string programName)
        {
            string prgListName = System.Web.HttpContext.Current.Server.MapPath(HttpRuntime.AppDomainAppVirtualPath) + "App_Data\\ProgramList.xml";
            string whereList = "";
            try
            {
                XElement xel = XElement.Load(prgListName);

                var datas = from x in xel.Descendants("Program")
                            select x;

                foreach (XElement d in datas)
                {
                    if (d.Attribute("ProgramName").Value == programName)
                    {
                        if (d.Attribute("WhereList") != null)
                            whereList = d.Attribute("WhereList").Value;
                        break;
                    }

                }

                if (whereList == "")
                {
                    throw new Exception("未对该程序模块进行相应配置。");
                }
                return whereList;
            }
            catch (Exception ex)
            {
                throw new Exception("未对该程序模块进行相应配置。");
            }
        }

        #endregion
    }
}