using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using grproLib;

namespace FacOneZPStation
{
    public class ReportHelper
    {
        public GridppReport Report;
        private DataTable _dtDataDetail;
        public ReportHelper(string filename, DataTable dtDataHead, DataTable dtDataDetail, int paperOrigntation, short copies, string printerName)
        {
            Init(filename, dtDataHead, dtDataDetail, paperOrigntation, copies, printerName);
        }

        private void Init(string filename, DataTable dtDataHead, DataTable dtDataDetail, int paperOrigntation, short copies, string printerName)
        {
            try
            {
                _dtDataDetail = dtDataDetail;
                Report = new GridppReport();
                Report.LoadFromFile(filename);
                Report.FetchRecord += Report_FetchRecord;
                Report.Printer.PrinterName = printerName;
                Report.Printer.PaperOrientation = (GRPaperOrientation)paperOrigntation;
                Report.Printer.Copies = copies;
                FillParameters(Report, dtDataHead);
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
                throw;
            }

        }

        public void Print(bool isPreview, bool isShowDialog = true)
        {
            if (isPreview)
                Report.PrintPreview(true);
            else
                Report.Print(isShowDialog);
        }

        private void Report_FetchRecord()
        {
            if (_dtDataDetail != null)
            {
                FillRecordToReport(Report, _dtDataDetail);
            }
        }

        private void FillRecordToReport(IGridppReport report, DataTable dtDetail)
        {
            foreach (DataRow dr in dtDetail.Rows)
            {
                report.DetailGrid.Recordset.Append();
                foreach (DataColumn dc in dtDetail.Columns)
                {
                    var field = report.FieldByName(dc.ColumnName);
                    if (field == null) continue;
                    field.Value = dr[dc.ColumnName];
                }
                report.DetailGrid.Recordset.Post();
            }
        }

        private void FillParameters(GridppReport report, DataTable dtHead)
        {
            if (dtHead.Rows.Count == 0) return;
            foreach (DataColumn dc in dtHead.Columns)
            {
                var param = report.ParameterByName(dc.ColumnName);
                if (param == null) continue;
                param.Value = dtHead.Rows[0][dc.ColumnName];
            }
        }

        public static string GetTemplateFile(string sourfilename)
        {
            var ofd = new OpenFileDialog
            {
                Filter = @"Grid++ files (*.grf)|*.grf",
                Multiselect = false,
                RestoreDirectory = true,
                FileName = sourfilename,
                InitialDirectory = Path.GetDirectoryName(sourfilename),
            };
            if (ofd.ShowDialog() != DialogResult.OK) return string.Empty;
            return ofd.FileName;
        }
    }
}