#if !NET472
using System.Runtime.Versioning;
using RhSolutions.Tools;
#endif


using System.Text.RegularExpressions;

namespace RhSolutions.Services;

#if !NET472
[SupportedOSPlatform("windows")]
#endif
public class ExcelWriter : IWriter, IDisposable
{
    private readonly Application _application;
    private Worksheet _worksheet;
    private readonly ResultBar _resultBar;
    private readonly Dictionary<string, string> _headers;
    private readonly string _pricelistPath;
    private ProgressBar _progressBar;

    private Range _amountCell,
        _skuCell,
        _programLineCell,
        _nameCell,
        _oldSkuCell;

    public ExcelWriter(Application application, IAddInConfiguration configuration)
    {
        _application = application;
        _pricelistPath = configuration.GetPriceListPath();
        _resultBar = new();
        _headers = configuration.GetPriceListHeaders();
    }

    public void WriteProducts(Dictionary<Product, double> products)
    {
        WriteProducts(new[] { (string.Empty, products) });
    }

    public void WriteProducts(IEnumerable<(string, Dictionary<Product, double>)> products)
    {
        _worksheet = OpenNewPrice();

        if (!_worksheet.IsValidSource())
        {
            _application.ActiveWorkbook.Close();
            throw new ArgumentException(
                $"Целевой файл {_application.ActiveWorkbook.Name} не является прайс-листом.");
        }

        _amountCell = _worksheet.Cells.Find(_headers["Amount"]);
        _skuCell = _worksheet.Cells.Find(_headers["Sku"]);
        _programLineCell = _worksheet.Cells.Find(_headers["ProductLine"]);
        _nameCell = _worksheet.Cells.Find(_headers["Name"]);
        _oldSkuCell = _worksheet.Cells.Find(_headers["OldSku"]);

        _progressBar = new("Заполняю строки...", products
            .Select(p => p.Item2)
            .Sum(set => set.Count));

        if (products.Count() == 1)
        {
            foreach (var kvp in products.First().Item2)
            {
                FillPositionAmountToColumns(kvp, _amountCell.Column);
                _progressBar.Update();
            }
            FilterByAmount();
            _resultBar.Update();
        }

        else
        {
            foreach (var product in products)
            {
                _worksheet.Columns[_amountCell.Column]
                    .EntireColumn
                    .Insert(XlInsertShiftDirection.xlShiftToRight, XlInsertFormatOrigin.xlFormatFromRightOrBelow);

                Range newColumnHeader = _worksheet.Cells[_amountCell.Row, _amountCell.Column - 1];
                newColumnHeader.Value2 = $"{product.Item1}";
                newColumnHeader.WrapText = true;

                foreach (var kvp in product.Item2)
                {
                    FillPositionAmountToColumns(kvp, _amountCell.Column - 1, _amountCell.Column);
                    _progressBar.Update();
                }
            }

            FilterByAmount();
            _resultBar.Update();
        }
    }

    private Worksheet OpenNewPrice()
    {
        if (_application.Workbooks
            .Cast<Workbook>()
            .FirstOrDefault(w => w.FullName == _pricelistPath) != null)
        {
            throw new ArgumentException("Шаблонный файл редактируется в другом месте");
        }

        return _application.Workbooks.Open(_pricelistPath, null, true).ActiveSheet;
    }

    private void FillPositionAmountToColumns(KeyValuePair<Product, double> positionAmount, params int[] columns)
    {
        Range worksheetCells = _worksheet.Cells;
        Range skuColumn = _skuCell.EntireColumn;

        int? row = GetPositionRow(skuColumn, positionAmount.Key.ProductSku.ToString(), positionAmount.Key.ProductLines.FirstOrDefault());

        if (row != null)
        {
            foreach (int column in columns)
            {
                Range cell = worksheetCells[row, column];
                cell.AddValue(positionAmount.Value);
            }

            _resultBar.IncrementSuccess();
            return;
        }

        if (_oldSkuCell != null)
        {
            row = GetPositionRow(_oldSkuCell.EntireColumn, positionAmount.Key.ProductSku.ToString(), positionAmount.Key.ProductLines.FirstOrDefault());

            if (row != null)
            {
                Range nameCell = worksheetCells[row, _nameCell.Column];
                if (!Regex.IsMatch(nameCell.Value2, @"(арт. \d{11})"))
                {
                    nameCell.AddValue($"-> замена (арт. {positionAmount.Key.ProductSku})");
                }

                foreach (int column in columns)
                {
                    Range cell = worksheetCells[row, column];
                    cell.AddValue(positionAmount.Value);
                }

                _resultBar.IncrementReplaced();
                return;
            }
        }

        string sku = positionAmount.Key.ProductSku.Article;
        row = GetPositionRow(skuColumn, sku, positionAmount.Key.ProductLines.FirstOrDefault());

        if (row != null)
        {
            Range nameCell = worksheetCells[row, _nameCell.Column];
            if (!Regex.IsMatch(nameCell.Value2, @"(арт. \d{11})"))
            {
                nameCell.AddValue($" -> замена (арт. {positionAmount.Key.ProductSku})");
            }

            foreach (int column in columns)
            {
                Range cell = worksheetCells[row, column];
                cell.AddValue(positionAmount.Value);
            }

            _resultBar.IncrementReplaced();
            return;
        }

        FillMissing(positionAmount, columns);
        _resultBar.IncrementNotFound();
    }

    private void FillMissing(KeyValuePair<Product, double> positionAmount, params int[] columns)
    {
        Range worksheetCells = _worksheet.Cells;
        Range worksheetRows = _worksheet.Rows;
        int skuColumn = _skuCell.Column;
        int groupColumn = _programLineCell.Column;
        int nameColumn = _nameCell.Column;
        Product product = positionAmount.Key;

        int row = worksheetCells[worksheetRows.Count, skuColumn]
            .End[XlDirection.xlUp]
            .Row + 1;

        worksheetRows[row]
            .EntireRow
            .Insert(XlInsertShiftDirection.xlShiftDown, XlInsertFormatOrigin.xlFormatFromLeftOrAbove);

        Range previous = worksheetRows[row - 1];
        Range current = worksheetRows[row];

        previous.Copy(current);
        current.ClearContents();

        worksheetCells[row, groupColumn].Value2 = product.ProductLines.FirstOrDefault() ?? string.Empty;
        worksheetCells[row, nameColumn].Value2 = $"{product.Name} -> не найден (арт. {product.ProductSku})";
        worksheetCells[row, skuColumn].Value2 = "???";
        if (_oldSkuCell != null)
        {
            worksheetCells[row, _oldSkuCell.Column].Value2 = product.ProductSku;
        }

        foreach (int column in columns)
        {
            Range cell = worksheetCells[row, column];
            cell.AddValue(positionAmount.Value);
        }
    }

    private int? GetPositionRow(Range range, string sku, string group)
    {
        Range found = range.Find(sku);
        string foundGroupValue;

        if (found == null)
        {
            return null;
        }

        int firstFoundRow = found.Row;

        if (string.IsNullOrEmpty(group))
        {
            return found.Row;
        }

        while (true)
        {
            foundGroupValue = _worksheet.Cells[found.Row, _programLineCell.Column].Value2.ToString();

            if (group.Equals(foundGroupValue))
            {
                return found.Row;
            }

            found = range.FindNext(found);

            if (found.Row == firstFoundRow)
            {
                return null;
            }
        }
    }

    private void FilterByAmount()
    {
        AutoFilter filter = _worksheet.AutoFilter;
        int startColumn = filter.Range.Column;

        filter.Range.AutoFilter(_amountCell.Column - startColumn + 1, "<>0", XlAutoFilterOperator.xlAnd, "<>");
        _worksheet.Range["A1"].Activate();
    }

    public void Dispose()
    {
        _progressBar?.Dispose();
        _resultBar?.Dispose();
    }
}