using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Drawing;
using System.Threading;
using System.Net;
using System.Net.Mail;
using System.Data;

using CommonLib.utils;
using ERPClient.main;
using CommonLib;

namespace ERPClient
{
    public sealed class ClientMain
    {
        private static ClientMain _instance = null;
        public static ClientMain Instance
        {
            get
            {
                if (_instance == null)
                    _instance = new ClientMain();
                return _instance;
            }
        }

        private ClientMain()
        {
        }

        public void StartApp()
        {
            ERPInfo.Instance.WSName = PubUtil.GetMachineName();
            //c#连接数据库
            if (!DBConfig.Instance.CreateConnection())
            {
                MessageBox.Show("数据库连接不正常，请重新配置！错误码：001");
                RunConfigForm();
                return;
            }
            //delphi连接数据库
            StringBuilder ConStr = new StringBuilder();
            ConStr.Append(DBConfig.Instance.GetDelphiConStr());
            if (PubUtil.Delphi_Init(ConStr) == 0)
            {
                MessageBox.Show("数据库连接不正常，请重新配置！错误码：002");
                RunConfigForm();
                return;
            }
            //显示登陆窗体
            FrmLogin _frmLogin = new FrmLogin();
            _frmLogin.ShowDialog();
            PubUtil.ReleaseForm(_frmLogin);
            _frmLogin = null;
            //登陆正确方可继续下一步
            if (ERPInfo.Instance.LoginResult == false)
                return;
            //登陆正确后重新设置连接
            //delphi连接数据库
            ConStr.Clear();
            ConStr.Append(DBConfig.Instance.GetDelphiConStr());
            if (PubUtil.Delphi_Init(ConStr) == 0)
            {
                MessageBox.Show("数据库连接不正常，请重新配置！错误码：002");
                RunConfigForm();
                return;
            }

            //记录登录日志
            PubUtil.WriteOpLog("", "", "登录软件", "进入操作", "系统登录");
            //换了用户重新写入登录用户
            if (DBConfig.Instance.LoginName != ERPInfo.Instance.EmployeeName)
            {
                DBConfig.Instance.LoginName = ERPInfo.Instance.EmployeeName;
                DBConfig.Instance.WriteConfig2();
            }
            //模拟服务器时间
            ServerTimer.StartTimer();
            //升级检查
            //if (DBConfig.Instance.GetUpdateFlag())
            //{
            //    FrmDownLoad _frmDownload = new FrmDownLoad();
            //    DialogResult _dialogResult = _frmDownload.ShowDialog();
            //    PubUtil.ReleaseForm(_frmDownload);
            //    _frmDownload = null;
            //    if (_dialogResult != DialogResult.OK)
            //    {
            //        return;
            //    }
            //}
            //如果只有一个模块直接启动主界面
            DataTable dtSys = SqlHelper.ExecuteDataSet(CommandType.Text, "select * from P_SubSystemTab where UseEd=1 order by SubSysId", "P_SubSystemTab").Tables[0];
            if (dtSys != null && dtSys.Rows.Count == 1)
            {
                ERPInfo.Instance.SubCount = dtSys.Rows.Count;
                while (Program.m_bitMain == null)
                    Thread.Sleep(100);
                ERPInfo.Instance.SubSysId = Convert.ToInt32(dtSys.Rows[0]["SubSysId"]);
                ERPInfo.Instance.SubSysName = dtSys.Rows[0]["SubSysName"].ToString();
                FrmMain frm = new FrmMain();
                frm.ShowDialog();
            }
            else
            {
                ERPInfo.Instance.SubCount = dtSys.Rows.Count;
                GoSelectSubSystem();
            }
        }

        /// <summary>
        /// 切换用户
        /// </summary>
        public void GoSwithUser()
        {
            ERPInfo.Instance.ExitResult = ENUMCloseAction.caNone;
            FrmMain _frmMain = new FrmMain();
            _frmMain.ShowDialog();
            PubUtil.ReleaseForm(_frmMain);
            _frmMain = null;
            if (ERPInfo.Instance.ExitResult == ENUMCloseAction.caNone)
            {
                ERPInfo.Instance.SubSysId = 0;
                GoSelectSubSystem();
            }
            if (ERPInfo.Instance.ExitResult == ENUMCloseAction.caRelogin)
            {
                GoSwithUser();
            }
            //记录登出日志
            PubUtil.WriteOpLog("", "", "退出软件", "软件退出", "系统登录");
        }

        /// <summary>
        /// 启动数据库配置
        /// </summary>
        private void RunConfigForm()
        {
            FrmConfig _frmConfig = new FrmConfig();
            _frmConfig.ShowDialog();
            PubUtil.ReleaseForm(_frmConfig);
            _frmConfig = null;
        }

        /// <summary>
        /// 选择子系统
        /// </summary>
        private void GoSelectSubSystem()
        {
            FrmSelSubSystem _frmSelSubSystem = new FrmSelSubSystem();
            if (_frmSelSubSystem.ShowDialog() != DialogResult.OK)
            {
                //记录登出日志
                PubUtil.WriteOpLog("", "", "退出软件", "软件退出", "系统登录");
                PubUtil.ReleaseForm(_frmSelSubSystem);
                return;
            }
            PubUtil.ReleaseForm(_frmSelSubSystem);
            _frmSelSubSystem = null;
           // ERPInfo.Instance.SubSysId = 1;
            //没有选择到正确子系统
            if (ERPInfo.Instance.SubSysId == 0)
            {
                //记录登出日志
                PubUtil.WriteOpLog("", "", "退出软件", "软件退出", "系统登录");
                return;
            }
            //设置delphi公用库参数
            ERPInfo.Instance.SetDephiDllParams();

            ERPInfo.Instance.ExitResult = ENUMCloseAction.caNone;
            FrmMain _frmMain = new FrmMain();
            _frmMain.ShowDialog();

            PubUtil.ReleaseForm(_frmMain);
            _frmMain = null;
            if (ERPInfo.Instance.ExitResult == ENUMCloseAction.caNone)
            {
                ERPInfo.Instance.SubSysId = 0;
                GoSelectSubSystem();
            }
            if (ERPInfo.Instance.ExitResult == ENUMCloseAction.caRelogin)
            {
                GoSwithUser();
            }
            //记录登出日志
            PubUtil.WriteOpLog("", "", "退出软件", "软件退出", "系统登录");
        }
    }
}