//
//  Class:			ExcelReader
//	Current CLR:	4.0.30319.34209
//	System:			Microsoft Visual Studio 10.0
//	Author:			dani
// 	Created:		6/15/2015 10:03:40 PM
//
//	Copyright (c) 2015 Informatikbüro Daniel Schick. All rights reserved.

using System;
using System.Collections.Generic;
using System.Data;
using System.IO;

using log4net;

using Excel.Core;
using Excel;

namespace bsmd.ExcelReadService
{
    public class ExcelReader : IDisposable
    {
        private IExcelDataReader dataReader;
        private ILog _log = LogManager.GetLogger(typeof(ExcelReader));

        public ExcelReader(string filePath)
        {
            using (FileStream fs = File.Open(filePath, FileMode.Open, FileAccess.Read))
            {
                if (filePath.EndsWith(".xls", StringComparison.InvariantCultureIgnoreCase))
                    dataReader = ExcelReaderFactory.CreateBinaryReader(fs);
                else if (filePath.EndsWith(".xlsx", StringComparison.InvariantCultureIgnoreCase))
                    dataReader = ExcelReaderFactory.CreateOpenXmlReader(fs);
                else
                    throw new ArgumentException(string.Format("saved file {0} is not an excel file", filePath));
            }
        }

        public object GetCell(string workSheetName, int row, int col)
        {
            this.dataReader.IsFirstRowAsColumnNames = false;
            DataSet dataSet = dataReader.AsDataSet();
            DataTable workSheet = dataSet.Tables[workSheetName];
            
            var cellValue = workSheet.Rows[row][col];

            return cellValue;
        }

        

        public void Dispose()
        {
            if (this.dataReader != null)
                this.dataReader.Dispose();
        }
    }
}