using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;
using DocumentFormat.OpenXml;
using RodionovLibrary.NonVisualComponents.HelperModels;
using System.ComponentModel;

namespace RodionovLibrary.NonVisualComponents
{
    public partial class WordTableComponent : Component
    {
        public WordTableComponent()
        {
            InitializeComponent();
        }

        public WordTableComponent(IContainer container)
        {
            container.Add(this);

            InitializeComponent();
        }

        public void CreateTable<T>(WordTableInfo<T> tableInfo)
        {
            ValidateInputData(tableInfo);

            using (WordprocessingDocument wordDoc = WordprocessingDocument.Create(tableInfo.FileName, WordprocessingDocumentType.Document))
            {
                MainDocumentPart mainPart = wordDoc.AddMainDocumentPart();
                mainPart.Document = new Document();
                Body body = mainPart.Document.AppendChild(new Body());

                ParagraphProperties paragraphProperties = new();
                paragraphProperties.AppendChild(new Justification { Val = JustificationValues.Center });

                Paragraph titleParagraph = new();
                titleParagraph.AppendChild(paragraphProperties);

                Run docRun = new();

                RunProperties runProperties = new();
                runProperties.AppendChild(new FontSize { Val = "48" });
                runProperties.AppendChild(new Bold());
               
                docRun.AppendChild(runProperties);
                docRun.AppendChild(new Text(tableInfo.Title));

                titleParagraph.AppendChild(docRun);
                body.Append(titleParagraph);

                Table table = new();
                
                double totalWidthTwips = tableInfo.FirstRowColumnParameters.Sum(column => column.Width) * 566.93;
                TableProperties tableProperties = new(
                    new TableBorders(
                        new TopBorder { Val = BorderValues.Single, Size = 8 },
                        new BottomBorder { Val = BorderValues.Single, Size = 8 },
                        new LeftBorder { Val = BorderValues.Single, Size = 8 },
                        new RightBorder { Val = BorderValues.Single, Size = 8 },
                        new InsideHorizontalBorder { Val = BorderValues.Single, Size = 8 },
                        new InsideVerticalBorder { Val = BorderValues.Single, Size = 8 }
                    ),
                    new TableWidth { Width = totalWidthTwips.ToString("F0"), Type = TableWidthUnitValues.Dxa },
                    new TableJustification { Val = TableRowAlignmentValues.Center }
                 );
                table.AppendChild(tableProperties);

                AddTableHeaderRow(table, tableInfo.FirstRowColumnParameters);
                AddTableHeaderRow(table, tableInfo.SecondRowColumnParameters);

                MergeColumns(table, tableInfo.MergedColumns);

                AddTableData(table, tableInfo.Items, tableInfo.SecondRowColumnParameters);

                body.Append(table);

                mainPart.Document.Save();
            }
        }

        private void ValidateInputData<T>(WordTableInfo<T> tableInfo)
        {
            if (string.IsNullOrEmpty(tableInfo.FileName) || string.IsNullOrEmpty(tableInfo.Title))
            {
                throw new ArgumentException("Не все данные заполнены");
            }

            CheckColumnParameters(tableInfo.FirstRowColumnParameters, false);
            CheckColumnParameters(tableInfo.SecondRowColumnParameters, true);

            if (tableInfo.Items == null || tableInfo.Items.Count == 0)
            {
                throw new ArgumentException("Данные для основной части таблицы не заданы");
            }

            foreach (var column in tableInfo.SecondRowColumnParameters)
            {
                if (typeof(T).GetProperty(column.PropertyName) == null)
                {
                    throw new ArgumentException($"Свойство '{column.PropertyName}' не найдено в классе {typeof(T).Name}.");
                }
            }

            ValidateMergedColumns(tableInfo.MergedColumns, tableInfo.FirstRowColumnParameters.Count);
        }

        private void CheckColumnParameters(List<ColumnParameters> columnParameters, bool isSecondRow)
        {
            if (columnParameters == null || columnParameters.Count == 0)
            {
                throw new ArgumentException("Не заданы колонки для таблицы");
            }

            foreach (var column in columnParameters)
            {
                if (string.IsNullOrEmpty(column.Header))
                {
                    throw new ArgumentException("Заголовок не задан для одной из колонок в таблице");
                }
                if (column.Width <= 0)
                {
                    throw new ArgumentException($"У колонки с заголовком {column.Header} ширина должна быть больше нуля.");
                }
                if (isSecondRow && string.IsNullOrEmpty(column.PropertyName))
                {
                    throw new ArgumentException($"Свойство не задано для заголовка: {column.Header}.");
                }
            }
        }

        private void ValidateMergedColumns(List<(int start, int end)> mergedColumns, int totalColumns)
        {
            if (mergedColumns == null || mergedColumns.Count == 0)
            {
                return;
            }

            foreach (var (start, end) in mergedColumns)
            {
                if (start < 0 || end >= totalColumns)
                {
                    throw new ArgumentException("Индексы объединенных колонок выходят за пределы допустимых значений.");
                }

                var overlappingRanges = mergedColumns
                    .Where(m => m != (start, end))
                    .Any(m => m.start <= end && m.end >= start);

                if (overlappingRanges)
                {
                    throw new ArgumentException("Объединенные ячейки пересекаются.");
                }
            }
        }

        private void AddTableHeaderRow(Table table, List<ColumnParameters> columnParameters)
        {
            TableRow headerRow = new();
            foreach (var column in columnParameters)
            {
                TableCell cell = new(new Paragraph(new Run(new Text(column.Header))));
                TableCellProperties cellProps = new()
                {
                    TableCellWidth = new TableCellWidth { Type = TableWidthUnitValues.Dxa, Width = (column.Width * 566.93).ToString("F0") },
                    TableCellVerticalAlignment = new TableCellVerticalAlignment { Val = TableVerticalAlignmentValues.Center }
                };

                ParagraphProperties paragraphProperties = new(new Justification { Val = JustificationValues.Center });
                RunProperties runProperties = new() { Bold = new Bold() };

                cell.Append(cellProps);
                cell.Append(paragraphProperties);
                cell.Elements<Paragraph>().First().Elements<Run>().First().RunProperties = runProperties;

                headerRow.Append(cell);
            }
            table.Append(headerRow);
        }

        private void MergeColumns(Table table, List<(int start, int end)> mergedColumns)
        {
            foreach (var (startCellIndex, endCellIndex) in mergedColumns)
            {
                for (int i = startCellIndex; i <= endCellIndex; i++)
                {
                    TableCell cell = table.Elements<TableRow>().ElementAt(0).Elements<TableCell>().ElementAt(i);
                    cell.TableCellProperties.Append(new HorizontalMerge { Val = i == startCellIndex ? MergedCellValues.Restart : MergedCellValues.Continue });    
                }
            }

            int totalColumns = table.Elements<TableRow>().ElementAt(0).Elements<TableCell>().Count();
            for (int i = 0; i < totalColumns; i++)
            {
                bool isColumnMergedHorizontally = mergedColumns.Any(m => m.start <= i && m.end >= i);

                if (!isColumnMergedHorizontally)
                {
                    TableCell firstRowCell = table.Elements<TableRow>().ElementAt(0).Elements<TableCell>().ElementAt(i);
                    TableCell secondRowCell = table.Elements<TableRow>().ElementAt(1).Elements<TableCell>().ElementAt(i);

                    firstRowCell.TableCellProperties.Append(new VerticalMerge { Val = MergedCellValues.Restart });
                    secondRowCell.TableCellProperties.Append(new VerticalMerge { Val = MergedCellValues.Continue });
                }
            }
        }

        private void AddTableData<T>(Table table, List<T> items, List<ColumnParameters> columnParameters)
        {
            foreach (var item in items)
            {
                TableRow dataRow = new();
                foreach (var column in columnParameters)
                {
                    TableCell cell = new(new Paragraph(new Run(new Text(item?.GetType().GetProperty(column.PropertyName)?.GetValue(item)?.ToString() ?? string.Empty))));

                    TableCellProperties cellProps = new()
                    {
                        TableCellVerticalAlignment = new TableCellVerticalAlignment { Val = TableVerticalAlignmentValues.Center }
                    };

                    ParagraphProperties paragraphProperties = new(new Justification { Val = JustificationValues.Center });

                    cell.Append(cellProps);
                    cell.Append(paragraphProperties);

                    dataRow.Append(cell);
                }
                table.Append(dataRow);
            }
        }
    }
}