using System;
using System.Data;
using System.Data.Common;
using System.Configuration;
using System.Text;
using System.Collections.Generic;
using Wellan.Data;

/// <summary>
/// 員工資料的資料處理類別
/// </summary>
public class BpsnDAC : Wellan.Data.BPSN_DAC
{
    private DbCommand cmdSelect;
    private DbCommand cmdInsert;
    private DbCommand cmdUpdate;
    private DbCommand cmdDelete;
    private StringBuilder sb = new StringBuilder();
    private string select = "SELECT * ";
    private string from = " FROM BPSNView ";
    private string where = " WHERE 1=1 ";
    private string order = " ORDER BY BPENO ";

    public BpsnDAC()
    {
    }

    public BpsnDAC(string connectionConfig, string connectionConfigName)
        : this()
    {
        this._connectionConfig = connectionConfig;
        this._connectionConfigName = connectionConfigName;
    }

    public BpsnDAC(WQuery query)
    {
        this._query = query;
    }

    private void Init()
    {
        EnsureQuery();
        EnsureDbObjects();
    }

    private void EnsureDbObjects()
    {
        cmdSelect = Query.NewCommand();
        cmdInsert = Query.NewCommand();
        cmdUpdate = Query.NewCommand();
        cmdDelete = Query.NewCommand();
    }

    public DataTable SelectAll()
    {
        Init();
        cmdSelect.CommandText = select + from + order;
        cmdSelect.Parameters.Clear();
        return Query.Select(cmdSelect);
    }

    public void ClearWhere()
    {
        Init();
        cmdSelect.Parameters.Clear();
        sb.Length = 0;
        sb.Append(select);
        sb.Append(from);
        sb.Append(where);
    }

    public void AddWhere(string fieldName, string value1, string value2, bool like)
    {
        Init();

        if (value1 != null && value1.Length > 0 && value2 != null && value2.Length > 0)
        {
            sb.Append(String.Format(" AND {0} >= @{0}1 AND {0} <= @{0}2 ", fieldName));
            cmdSelect.Parameters.Add(Query.NewParameter(fieldName + "1", value1));
            cmdSelect.Parameters.Add(Query.NewParameter(fieldName + "2", value2));
        }
        else if (value1 != null && value1.Length > 0)
        {
            if (like)
            {
                sb.Append(String.Format(" AND {0} LIKE @{0} ", fieldName));
                cmdSelect.Parameters.Add(Query.NewParameter(fieldName, value1.ToString() + "%"));
            }
            else
            {
                sb.Append(String.Format(" AND {0} = @{0} ", fieldName));
                cmdSelect.Parameters.Add(Query.NewParameter(fieldName, value1));
            }
        }
        else if (value2 != null && value2.Length > 0)
        {
            if (like)
            {
                sb.Append(String.Format(" AND {0} LIKE @{0} ", fieldName));
                cmdSelect.Parameters.Add(Query.NewParameter(fieldName, value2 + "%"));
            }
            else
            {
                sb.Append(String.Format(" AND {0} = @{0} ", fieldName));
                cmdSelect.Parameters.Add(Query.NewParameter(fieldName, value2));
            }
        }
    }

    public DataTable SelectByWhere()
    {
        Init();
        sb.Append(order);
        return Query.Select(cmdSelect);
    }

    /// <summary>
    /// 取得人員目前派駐專案
    /// </summary>
    /// <param name="bpeno"></param>
    /// <returns></returns>
    public string GetCurrentProject(string bpeno)
    {
        return GetProjectByDate(bpeno, DateTime.UtcNow.AddHours(8).Date);
    }

    /// <summary>
    /// 取得人員目前派駐專案
    /// </summary>
    /// <param name="bpeno"></param>
    /// <returns></returns>
    public string GetProjectByDate(string bpeno, DateTime date)
    {
        DbCommand cmd = Query.NewCommand(@"
            SELECT TOP 1 RAPYN
            FROM
            (
                SELECT 1 AS O, RAPYN
                FROM RASN  
                WHERE RANUM = @BPENO
                    AND RASDT <= @DATE AND (RAEDT >= @DATE OR RAEDT IS NULL)
                UNION
                SELECT TOP 1 2 AS O, RAPYN 
                FROM RASN 
                WHERE RANUM = @BPENO 
                    AND DATEPART(YEAR, RASDT) = DATEPART(YEAR, @DATE)
                    AND DATEPART(MONTH, RASDT) = DATEPART(MONTH, @DATE)
            ) AS TMP1
            WHERE RAPYN <> '' AND RAPYN IS NOT NULL
            ORDER BY O");
        AddParam(cmd, "BPENO", bpeno);
        AddParam(cmd, "DATE", date);
        return GetStringValue(Query.ExecuteScalar(cmd));
    }

    /// <summary>
    /// 取得人員目前派駐地點
    /// </summary>
    /// <param name="bpeno"></param>
    /// <returns></returns>
    public string GetCurrentSite(string bpeno)
    {
        return GetSiteByDate(bpeno, DateTime.UtcNow.AddHours(8).Date);
    }

    /// <summary>
    /// 取得人員目前派駐地點
    /// </summary>
    /// <param name="bpeno"></param>
    /// <returns></returns>
    public string GetSiteByDate(string bpeno, DateTime date)
    {
        DbCommand cmd = Query.NewCommand(@"
        SELECT C.BSSCR
        FROM BPSNView A 
            LEFT OUTER JOIN RASN B ON A.BPENO=B.RANUM AND (B.RASDT <= @DATE AND (B.RAEDT >= @DATE OR B.RAEDT IS NULL))
            LEFT OUTER JOIN BCLS C ON B.RABRH=C.BSCLS AND C.BSPAR='BPSNBRH'
        WHERE A.BPENO=@BPENO");
        AddParam(cmd, "BPENO", bpeno);
        AddParam(cmd, "DATE", date);
        return GetStringValue(Query.ExecuteScalar(cmd));
    }

    /// <summary>
    /// 取得人員電子郵件
    /// </summary>
    /// <param name="bpeno"></param>
    /// <returns></returns>
    public string GetEmail(string bpeno)
    {
        DbCommand cmd = Query.NewCommand(@"
        SELECT BPEML
        FROM BPSNView
        WHERE BPENO=@BPENO");
        AddParam(cmd, "BPENO", bpeno);
        return GetStringValue(Query.ExecuteScalar(cmd));
    }

    /// <summary>
    /// 取得人員電子郵件2
    /// </summary>
    /// <param name="bpeno"></param>
    /// <returns></returns>
    public string GetEmail2(string bpeno)
    {
        DbCommand cmd = Query.NewCommand(@"
        SELECT BPEM2
        FROM BPSNView
        WHERE BPENO=@BPENO");
        AddParam(cmd, "BPENO", bpeno);
        return GetStringValue(Query.ExecuteScalar(cmd));
    }

    /// <summary>
    /// 取得某日期人員所屬公司名稱
    /// </summary>
    /// <param name="bpeno">員工編號</param>
    /// <param name="date">日期</param>
    /// <returns></returns>
    public List<string> GetCompanyByDate(string bpeno, DateTime date)
    {
        DbCommand cmd = Query.NewCommand(@"
        SELECT TOP 1 RPCPY FROM
        (
            SELECT RPENO, RPCPY, RPSDT, RPEDT, @YYMM-RPSDT AS SDTDIFF FROM RPIR
            WHERE RPENO=@BPENO AND 
                (RPSDT <= @YYMM AND RPEDT >= @YYMM
                OR RPSDT <= @YYMM AND RPEDT IS NULL)
            UNION
            SELECT RPENO, RPCPY, RPSDT, RPEDT, @YYMM-RPSDT AS SDTDIFF FROM RPIB 
            WHERE RPENO=@BPENO AND 
                (RPSDT <= @YYMM AND RPEDT >= @YYMM
                OR RPSDT <= @YYMM AND RPEDT IS NULL)
        ) AS TMP1
        ORDER BY SDTDIFF");
        AddParam(cmd, "BPENO", bpeno);
        AddParam(cmd, "YYMM", date);

        List<string> result = new List<string>();
        result.Add(GetStringValue(Query.ExecuteScalar(cmd)));
        result.Add(CompanyDAC.GetCompanyName(result[0]));
        return result;        
    }

    /// <summary>
    /// 取得人員到職日期
    /// </summary>
    /// <param name="bpeno"></param>
    /// <returns></returns>
    public DateTime GetBPSDY(string bpeno)
    {
      DbCommand cmd = Query.NewCommand(@"
        SELECT BPSDY
        FROM BPSNView           
        WHERE BPENO=@BPENO");
      AddParam(cmd, "BPENO", bpeno);
      return GetDateTimeValue(Query.ExecuteScalar(cmd));
    }

    /// <summary>
    /// 取得人員離職日期
    /// </summary>
    /// <param name="bpeno"></param>
    /// <returns></returns>
    public DateTime GetBPEDY(string bpeno)
    {
        DbCommand cmd = Query.NewCommand(@"
        SELECT BPEDY
        FROM BPSNView           
        WHERE BPENO=@BPENO");
        AddParam(cmd, "BPENO", bpeno);
        return GetDateTimeValue(Query.ExecuteScalar(cmd));
    }

    private static List<string> managerIds = new List<string>();

    public static bool IsManager(string bpeno)
    {
        if (managerIds.Count == 0)
        {
            managerIds.Add("00001");
            managerIds.Add("00002");
            managerIds.Add("00003");
        }

        return managerIds.Contains(bpeno);
    }

    /// <summary>
    /// 取出某日期在職的員工
    /// </summary>
    /// <param name="date">日期</param>
    /// <returns></returns>
    public DataTable GetOnBoardEmployee(DateTime date)
    {
        return Query.Select(Query.NewCommand("SELECT * FROM BPSNView WHERE dbo.EmployeeOnboard(BPENO, @DATE) = 1"));
    }
}