using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
//using Excel = Microsoft.Office.Interop.Excel;
using System.Reflection;

using OfficeOpenXml;
using System.Drawing;
using OfficeOpenXml.Style;

namespace VICrawlerNS
{
	public class ExcelHandler
	{
		string m_strFileName = "";
		string m_strToday = DateTime.Now.ToString("yyyy-MM-dd");

		public ExcelHandler(string strFileName, string[] astrColumns)
		{
			m_strFileName = strFileName;
			if(File.Exists(m_strFileName) == false)
				Create(astrColumns);
		}

		private void Create(string[] astrColumns)
		{
			lock(this)
			{
				FileInfo newFile = new FileInfo(m_strFileName);
				ExcelPackage package = new ExcelPackage(newFile);
				ExcelWorksheet Sheet = package.Workbook.Worksheets.Add("sheet");
				for(int i = 0; i<astrColumns.Length; i++)
					Sheet.Cells[1, i+1].Value = astrColumns[i];
				package.Save();
			}	
		}

		public bool AddRow(object[] row)
		{
			lock(this)
			{
				FileInfo newFile = new FileInfo(m_strFileName);
				ExcelPackage package = new ExcelPackage(newFile);
				ExcelWorksheet Sheet = package.Workbook.Worksheets["sheet"];
				int iRowNo = Sheet.Dimension.Rows+1;
				for(int i=0; i<row.Length; i++)
				{
					Sheet.Cells[iRowNo, i+1].Value = row[i];

					if(row[i].GetType() == typeof(int))
					{
						Sheet.Cells[iRowNo, i+1].Style.Numberformat.Format = "###,###,##0";
					}
					else if(row[i].GetType() == typeof(float))
					{
						Sheet.Cells[iRowNo, i+1].Style.Numberformat.Format = "###,###,##0.00";
						float fValue = (float)row[i];
						Sheet.Cells[iRowNo, i+1].Style.Font.Color.SetColor(fValue>0 ? Color.Red : fValue<0 ? Color.Blue : Color.Black);
					}
				}

				Sheet.Cells.AutoFitColumns(0);
				package.Save();
			}

			return true;
		}
	}
}