//using AsbSaubReport;
//using AutoMapper;
using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using ClosedXML.Excel;

namespace ConsoleApp1
{
    //var options = new DbContextOptionsBuilder<AsbCloudDbContext>()
    //    .UseNpgsql("Host=localhost;Database=postgres;Username=postgres;Password=q;Persist Security Info=True")
    //    .Options;
    //var context = new AsbCloudDbContext(options);


    class Program
    {
        private static void RemovePicturesFromSheet(IXLWorksheet sheet)
        {
            var picsNames = new List<string>();

            foreach (var p in sheet.Pictures)
                picsNames.Add(p.Name);

            var filteredPics = picsNames.Distinct();

            foreach (var n in filteredPics)
                sheet.Pictures.Delete(n);
        }

        static void Main(/*string[] args*/)
        {
            var sourceExcelPaths = new List<string>
            {
                //@"D:\excels\excel1.xlsx",
                //@"D:\excels\excel2.xlsx"
                //@"D:\excels\e1.xlsx",
                //@"D:\excels\e2.xlsx",
                //@"D:\excels\e3.xlsx",
                @"D:\excels\e4.XLSX",
                @"D:\excels\e5.XLSX",
                @"D:\excels\e6.XLSX"
            };

            const string resultExcelPath = @"D:\excels\result.xlsx";

            using var resultExcelFile = new XLWorkbook();

            const int maxAllowedColumns = 256;

            foreach(var sourceExcelPath in sourceExcelPaths)
            {
                using var sourceExcelFile = new XLWorkbook(sourceExcelPath);

                foreach (var sheet in sourceExcelFile.Worksheets)
                {
                    //var columnsToDelete = sheet.Columns().Skip(sheet.ColumnsUsed().Count());

                    //foreach (var d in columnsToDelete)
                    //    d.Delete();

                    if (sheet.Columns().Count() > maxAllowedColumns && 
                        sheet.Columns().Count() / sheet.ColumnsUsed().Count() > 5)
                    {
                        Console.WriteLine($"В файле {Path.GetFileName(sourceExcelPath)} " +
                            $"{sheet.Columns().Count() - sheet.ColumnsUsed().Count()} пустых колонок " +
                            $"без записей. \n Если продолжить выполнение, форматирование выходного" +
                            $"листа может быть нарушено. \n Для сохранения структуры документа " +
                            $"рекомендуется прервать выполнение и удалить неиспользуемые колонки. \n" +
                            $" Продолжить выполнение? (y/n)");

                        var res = Console.ReadLine();

                        if (res != "y")
                            return;

                        var firstTableCell = sheet.FirstCellUsed();
                        var lastTableCell = sheet.LastCellUsed();
                        var rngData = sheet.Range(firstTableCell.Address, lastTableCell.Address);

                        RemovePicturesFromSheet(sheet);

                        var wsCopy = resultExcelFile.Worksheets.Add(sheet.Name);
                        wsCopy.Cell(1, 1).Value = rngData;

                        GC.Collect();
                    }
                    else
                    {
                        RemovePicturesFromSheet(sheet);

                        sheet.CopyTo(resultExcelFile, sheet.Name);
                        GC.Collect();
                    }
                }
            }

            resultExcelFile.SaveAs(resultExcelPath);

            Console.WriteLine("Done. Press any key to quit.");
            Console.ReadKey();
        }

    }
}