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

/// <summary>
/// BprjDAC 的摘要描述
/// </summary>
[DataObject(true)]
public class BprjDAC : Wellan.Data.WDAC
{
    public BprjDAC()
    {
    }

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

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

    private const string LastYearExpr =
        "(SELECT TOP 1 BPYER FROM BPAA WHERE BPAA.BPPNM = BPRJ.BPPNM ORDER BY BPYER DESC)";

    /// <summary>
    /// 客戶專案 Grid 分頁查詢
    /// </summary>
    [DataObjectMethod(DataObjectMethodType.Select)]
    public DataTable SelectPage(int startRowIndex, int maximumRows, string BPNUM, string BPPNM, string BPPME)
    {
        DbCommand cmd = Query.NewCommand();

        StringBuilder filter = new StringBuilder();
        BuildFilter(filter, cmd, BPNUM, BPPNM, BPPME);

        cmd.CommandText = String.Format(
            @"SELECT * FROM
              (
                SELECT X.*, ROW_NUMBER() OVER (ORDER BY LAST_YEAR DESC, BPNUM, BPPNM) AS ROWID
                FROM
                (
                  SELECT *, {0} LAST_YEAR FROM BPRJ WHERE 1=1 {1}
                ) X
              ) AS TMP
              WHERE ROWID BETWEEN @STARTROWINDEX + 1 AND @STARTROWINDEX + @MAXIMUMROWS
              ORDER BY ROWID",
            LastYearExpr, filter.ToString());
        cmd.Parameters.Add(Query.NewParameter("STARTROWINDEX", startRowIndex));
        cmd.Parameters.Add(Query.NewParameter("MAXIMUMROWS", maximumRows));

        return Query.Select(cmd);
    }

    /// <summary>
    /// 客戶專案 Grid 查詢筆數
    /// </summary>
    [DataObjectMethod(DataObjectMethodType.Select)]
    public int SelectCount(string BPNUM, string BPPNM, string BPPME)
    {
        DbCommand cmd = Query.NewCommand();

        StringBuilder filter = new StringBuilder();
        BuildFilter(filter, cmd, BPNUM, BPPNM, BPPME);

        cmd.CommandText = String.Format("SELECT COUNT(*) FROM BPRJ WHERE 1=1 {0}", filter.ToString());
        return WDAC.GetInt32Value(Query.ExecuteScalar(cmd));
    }

    /// <summary>
    /// 取得指定專案在查詢結果中的序號 (0 起算)
    /// </summary>
    public int SelectBPRJIndex(string targetBPNUM, string targetBPPNM, string BPNUM, string BPPNM, string BPPME)
    {
        DbCommand cmd = Query.NewCommand();

        StringBuilder filter = new StringBuilder();
        BuildFilter(filter, cmd, BPNUM, BPPNM, BPPME);

        cmd.CommandText = String.Format(
            @"SELECT ROWID - 1 FROM
              (
                SELECT X.BPNUM, X.BPPNM, ROW_NUMBER() OVER (ORDER BY X.LAST_YEAR DESC, X.BPNUM, X.BPPNM) AS ROWID
                FROM
                (
                  SELECT BPNUM, BPPNM, {0} LAST_YEAR FROM BPRJ WHERE 1=1 {1}
                ) X
              ) AS TMP WHERE BPNUM = @TARGET_BPNUM AND BPPNM = @TARGET_BPPNM",
            LastYearExpr, filter.ToString());
        cmd.Parameters.Add(Query.NewParameter("TARGET_BPNUM", targetBPNUM));
        cmd.Parameters.Add(Query.NewParameter("TARGET_BPPNM", targetBPPNM));

        object o = Query.ExecuteScalar(cmd);
        return (o is Int32 || o is Int64) ? WDAC.GetInt32Value(o) : -1;
    }

    /// <summary>
    /// 組出客戶專案 Grid 的查詢條件 (與舊 AddSearch 行為一致)
    /// </summary>
    private void BuildFilter(StringBuilder sb, DbCommand cmd, string BPNUM, string BPPNM, string BPPME)
    {
        if (!string.IsNullOrEmpty(BPNUM))
        {
            sb.Append(" AND BPNUM LIKE @BPNUM1 ");
            cmd.Parameters.Add(Query.NewParameter("BPNUM1", BPNUM + "%"));
        }
        if (!string.IsNullOrEmpty(BPPNM))
        {
            sb.Append(" AND BPPNM LIKE @BPPNM1 ");
            cmd.Parameters.Add(Query.NewParameter("BPPNM1", BPPNM + "%"));
        }
        if (!string.IsNullOrEmpty(BPPME))
        {
            sb.Append(" AND BPPME LIKE @BPPME1 ");
            cmd.Parameters.Add(Query.NewParameter("BPPME1", "%" + BPPME + "%"));
        }
    }
}