using Word = Microsoft.Office.Interop.Word;
using WinFormsLibrary.NonVisualComponents.Helpers;
using System.ComponentModel;

namespace WinFormsLibrary.NonVisualComponents
{
	public partial class WordTable : Component
	{
		public WordTable()
		{
			InitializeComponent();
		}

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

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

			var wordApp = new Word.Application();
			var document = wordApp.Documents.Add();
			var range = document.Range();

			var paragraph = range.Paragraphs.Add();
			paragraph.Range.Text = tableInfo.Title;
			paragraph.Range.Font.Name = "Times New Roman";
			paragraph.Range.Font.Size = 20;
			paragraph.Range.Font.Bold = 1;
			paragraph.Alignment = Word.WdParagraphAlignment.wdAlignParagraphCenter;
			paragraph.Range.ParagraphFormat.SpaceAfter = 8;
			paragraph.Range.InsertParagraphAfter();

			var table = document.Tables.Add(paragraph.Range, tableInfo.Items.Count + 2, tableInfo.ColumnInfos.Count);
			table.Borders.Enable = 1;
			table.Range.Font.Name = "Times New Roman";
			table.Range.Font.Size = 11;

			for (int i = 0; i < tableInfo.ColumnInfos.Count; i++)
			{
				table.Columns[i + 1].Width = (float)(tableInfo.ColumnInfos[i].Width * 28);
			}

			AddTableHeaderRow(table, tableInfo.ColumnInfos, true);

			AddTableHeaderRow(table, tableInfo.ColumnInfos, false);

			MergeColumns(table, tableInfo.MergedColumns);

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

			document.SaveAs2(tableInfo.Path);
			wordApp.Quit();
		}
		private void AddTableHeaderRow(Word.Table table, List<ColumnInfo> columnInfos, bool isFirstRow)
		{
			for (int i = 0; i < columnInfos.Count; i++)
			{
				var header = isFirstRow ? columnInfos[i].FirstRowHeader : columnInfos[i].SecondRowHeader;
				if (!string.IsNullOrEmpty(header))
				{
					var cell = table.Cell(isFirstRow ? 1 : 2, i + 1);
					cell.Range.Text = header;
					cell.Range.Bold = 1;
					cell.Range.ParagraphFormat.Alignment = Word.WdParagraphAlignment.wdAlignParagraphCenter;
					cell.VerticalAlignment = Word.WdCellVerticalAlignment.wdCellAlignVerticalCenter;
					cell.Range.ParagraphFormat.SpaceBefore = 4;
					cell.Range.ParagraphFormat.SpaceAfter = 4;
				}
			}
		}
		private void MergeColumns(Word.Table table, List<(int start, int end)> mergedColumns)
		{
			for (int i = 1; i <= table.Columns.Count; i++)
			{
				bool isMergedHorizontally = mergedColumns.Any(m => m.start <= i - 1 && m.end >= i - 1);

				if (!isMergedHorizontally)
				{
					table.Cell(1, i).Merge(table.Cell(2, i));
				}
			}

			int xOffset = 0;
			foreach (var (start, end) in mergedColumns)
			{
				var cellStart = table.Cell(1, start + 1 - xOffset);
				var cellEnd = table.Cell(1, end + 1 - xOffset);

				string textToKeep = cellStart.Range.Text.TrimEnd('\r', '\a');
				cellStart.Merge(cellEnd);
				cellStart.Range.Text = textToKeep;

				xOffset += end - start;
			}
		}
		private void AddTableData<T>(Word.Table table, List<T> items, List<ColumnInfo> columnInfos)
		{
			for (int rowIndex = 0; rowIndex < items.Count; rowIndex++)
			{
				var item = items[rowIndex];
				for (int colIndex = 0; colIndex < columnInfos.Count; colIndex++)
				{
					var property = typeof(T).GetProperty(columnInfos[colIndex].PropertyName);
					var value = property?.GetValue(item)?.ToString() ?? string.Empty;
					table.Cell(rowIndex + 3, colIndex + 1).Range.Text = value;
					table.Cell(rowIndex + 3, colIndex + 1).Range.Bold = 0;
					table.Cell(rowIndex + 3, colIndex + 1).Range.ParagraphFormat.Alignment = Word.WdParagraphAlignment.wdAlignParagraphCenter;
					table.Cell(rowIndex + 3, colIndex + 1).VerticalAlignment = Word.WdCellVerticalAlignment.wdCellAlignVerticalCenter;
					table.Cell(rowIndex + 3, colIndex + 1).Range.ParagraphFormat.SpaceBefore = 2;
					table.Cell(rowIndex + 3, colIndex + 1).Range.ParagraphFormat.SpaceAfter = 2;
				}
			}
		}

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

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

			ValidateMergedColumns(wordTableInfo.MergedColumns, wordTableInfo.ColumnInfos.Count);
		}

		public void CheckColumnInfo(List<ColumnInfo> columns)
		{
			if ((columns == null) || (columns.Count == 0))
			{
				throw new ArgumentException("Нет информации о колонках");
			}
			foreach (var column in columns)
			{
				if (string.IsNullOrEmpty(column.FirstRowHeader) && string.IsNullOrEmpty(column.SecondRowHeader))
				{
					throw new ArgumentException("Заголовок не задан для одной из колонок в таблице");
				}
				if (column.Width <= 0)
				{
					throw new ArgumentException("Ширина колонки должна быть больше нуля.");
				}
				if (string.IsNullOrEmpty(column.PropertyName))
				{
					throw new ArgumentException("Свойство не задано для одной из колонок.");
				}

			}
		}
		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 вышли 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.");
				}
			}
		}

	}
}