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

/// <summary>
/// 年度科目設定的資料處理類別
/// </summary>
[DataObject(true)]
public class BpabDAC : Wellan.Data.WDAC
{
    public BpabDAC()
    {
    }

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

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

    /// <summary>
    /// 年度科目設定 Grid 分頁查詢
    /// mode: BIG=大類, SMALL=小類, 其他=科目
    /// </summary>
    [DataObjectMethod(DataObjectMethodType.Select)]
    public DataTable SelectPage(int startRowIndex, int maximumRows, string BPPYN, string mode)
    {
        DbCommand cmd = Query.NewCommand();

        StringBuilder filter = new StringBuilder();
        BuildFilter(filter, cmd, BPPYN, mode);

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

        return Query.Select(cmd);
    }

    /// <summary>
    /// 年度科目設定 Grid 查詢筆數
    /// </summary>
    [DataObjectMethod(DataObjectMethodType.Select)]
    public int SelectCount(string BPPYN, string mode)
    {
        DbCommand cmd = Query.NewCommand();

        StringBuilder filter = new StringBuilder();
        BuildFilter(filter, cmd, BPPYN, mode);

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

    private static string OrderBy(string mode)
    {
        if (mode == "BIG" || mode == "SMALL")
            return "BPPYN, BPCLS, BPORD";
        return "BPPYN, BPCLS";
    }

    /// <summary>
    /// 組出年度科目設定 Grid 的查詢條件 (與舊 Search 行為一致)
    /// </summary>
    private void BuildFilter(StringBuilder sb, DbCommand cmd, string BPPYN, string mode)
    {
        if (!string.IsNullOrEmpty(BPPYN))
        {
            sb.Append(" AND BPPYN LIKE @BPPYN1 ");
            cmd.Parameters.Add(Query.NewParameter("BPPYN1", BPPYN + "%"));
        }

        switch (mode)
        {
            case "BIG":
                sb.Append(" AND SUBSTRING(BPACC,3,4) = '0000' ");
                break;
            case "SMALL":
                sb.Append(" AND SUBSTRING(BPACC,3,2) <> '00' AND SUBSTRING(BPACC,5,2) = '00' ");
                break;
            default:
                sb.Append(" AND SUBSTRING(BPACC,3,2) <> '00' AND SUBSTRING(BPACC,5,2) <> '00' ");
                break;
        }
    }
}