#if !NET8

using Excel;

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

namespace Fab2ApprovalSystem.Misc {

    public class ExcelData {
        string _path;
        public ExcelData(string path) {
            _path = path;
        }

        public IExcelDataReader getExcelReader() {
            // ExcelDataReader works with the binary Excel file, so it needs a FileStream
            // to get started. This is how we avoid dependencies on ACE or Interop:

            FileStream stream = File.Open(_path, FileMode.Open, FileAccess.Read);
            // We return the interface, so that 
            IExcelDataReader reader = null;

            try {
                if (_path.EndsWith(".xls")) {
                    reader = ExcelReaderFactory.CreateBinaryReader(stream);
                }
                if (_path.EndsWith(".xlsx")) {
                    reader = ExcelReaderFactory.CreateOpenXmlReader(stream);
                }
                return reader;
            } catch (Exception) {
                throw;
            }

        }

        public class ExcelLotInfo {
            public string LotNo { get; set; }
            public string LotDispo { get; set; }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public IEnumerable<ExcelLotInfo> ReadData() {
            var r = new List<ExcelLotInfo>();
            var excelData = new ExcelData(_path);
            var lots = excelData.getData().ToList();

            int lotDispoColumnIndex = -1;
            foreach (DataColumn col in lots[0].Table.Columns) {
                if (col.ColumnName.ToLower().Contains("dispo")) {
                    lotDispoColumnIndex = col.Ordinal;
                    break;
                }
            }

            foreach (var row in lots) {
                string temValue = row[0].ToString();
                if (temValue.Trim().Length > 0 && temValue.Trim().Length <= 10) {
                    r.Add(new ExcelLotInfo() {
                        LotNo = row[0].ToString(),
                        LotDispo = (lotDispoColumnIndex >= 0 ? row[lotDispoColumnIndex].ToString() : "")
                    });
                }

            }
            return r;
        }

        public IEnumerable<string> ReadQDBFlagData() {
            List<string> s = new List<string>();
            // We return the interface, so that         
            var excelData = new ExcelData(_path);
            //var albums = excelData.getData("Sheet1");
            var lotNos = excelData.getData();
            foreach (var row in lotNos) {
                string temValue = row[0].ToString();
                if (temValue.Trim().Length > 0 && temValue.Trim().Length == 9) {
                    if (row[2].ToString().ToUpper() != "YES" && row[2].ToString().ToUpper() != "NO") {
                        throw new Exception("Invalid data in the file");
                    } else {
                        s.Add(row[0].ToString() + "~" + row[1] + "~" + row[2]);
                    }
                }

            }
            return s;
        }

        /// <summary>
        /// 
        /// </summary>

        /// <returns></returns>
        public IEnumerable<DataRow> getData(bool firstRowIsColumnNames = true) {
            var reader = this.getExcelReader();
            reader.IsFirstRowAsColumnNames = firstRowIsColumnNames;
            var workSheet = reader.AsDataSet().Tables[0];
            var rows = from DataRow a in workSheet.Rows select a;
            return rows;

        }

    }
}

#endif