using System;
using System.Data;
using System.Data.Common;
using System.Text;
using System.ComponentModel;
using Wellan.Data;

/// <summary>
/// 客戶資料的資料處理類別
/// </summary>
[DataObject(true)]
public class BcusDAC : Wellan.Data.WDAC
{
    public BcusDAC()
    {
    }

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

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

    /// <summary>
    /// 客戶資料 Grid 分頁查詢
    /// </summary>
    [DataObjectMethod(DataObjectMethodType.Select)]
    public DataTable SelectPage(int startRowIndex, int maximumRows, string BCNUM, string BCNAM)
    {
        DbCommand cmd = Query.NewCommand();

        StringBuilder filter = new StringBuilder();
        BuildFilter(filter, cmd, BCNUM, BCNAM);

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

        return Query.Select(cmd);
    }

    /// <summary>
    /// 客戶資料 Grid 查詢筆數
    /// </summary>
    [DataObjectMethod(DataObjectMethodType.Select)]
    public int SelectCount(string BCNUM, string BCNAM)
    {
        DbCommand cmd = Query.NewCommand();

        StringBuilder filter = new StringBuilder();
        BuildFilter(filter, cmd, BCNUM, BCNAM);

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

    /// <summary>
    /// 取得指定客戶編號在查詢結果中的序號 (0 起算)
    /// </summary>
    public int SelectBCNUMIndex(string targetBCNUM, string BCNUM, string BCNAM)
    {
        DbCommand cmd = Query.NewCommand();

        StringBuilder filter = new StringBuilder();
        BuildFilter(filter, cmd, BCNUM, BCNAM);

        cmd.CommandText = String.Format(
            @"SELECT ROWID - 1 FROM
              (
                SELECT BCNUM, ROW_NUMBER() OVER (ORDER BY BCNUM) AS ROWID
                FROM BCUS WHERE 1=1 {0}
              ) AS TMP WHERE BCNUM = @TARGET",
            filter.ToString());
        cmd.Parameters.Add(Query.NewParameter("TARGET", targetBCNUM));

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

    /// <summary>
    /// 組出客戶資料 Grid 的查詢條件 (與舊 AddSearch 行為一致)
    /// </summary>
    private void BuildFilter(StringBuilder sb, DbCommand cmd, string BCNUM, string BCNAM)
    {
        if (!string.IsNullOrEmpty(BCNUM))
        {
            sb.Append(" AND BCNUM LIKE @BCNUM1 ");
            cmd.Parameters.Add(Query.NewParameter("BCNUM1", BCNUM + "%"));
        }
        if (!string.IsNullOrEmpty(BCNAM))
        {
            sb.Append(" AND BCNAM LIKE @BCNAM1 ");
            cmd.Parameters.Add(Query.NewParameter("BCNAM1", BCNAM + "%"));
        }
    }
}