using MigraDoc.DocumentObjectModel;
using MigraDoc.DocumentObjectModel.Tables;
using MigraDoc.Rendering;
using Components.SaveToPdfHelpers;
using System.Text;

namespace Components
{
    internal class SaveToPdf
    {
        private Document? _document;
        private Section? _section;
        private Table? _table;
        public void CreateDoc(string title, string path, List<string[][]> tables)
        {
            _document = new Document();
            Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
            DefineStyles(_document);
            _section = _document.AddSection();

            CreateParagraph(new PdfParagraph
            {
                Text = title,
                Style = "NormalTitle",
                ParagraphAlignment = PdfParagraphAlignmentType.Left
            });

            foreach (var table in tables)
            {
                if (table.Length == 0) continue;

                CreateTable(Enumerable.Repeat("3cm", table[0].Length).ToList());

                foreach (var row in table)
                {
                    CreateRow(new PdfRowParameters
                    {
                        Texts = row.ToList(),
                        Style = "Normal",
                        ParagraphAlignment = PdfParagraphAlignmentType.Left
                    });
                }

                CreateParagraph(new PdfParagraph());
            }

            var renderer = new PdfDocumentRenderer(true)
            {
                Document = _document
            };
            renderer.RenderDocument();
            renderer.PdfDocument.Save(path);
        }
        private static ParagraphAlignment GetParagraphAlignment(PdfParagraphAlignmentType type)
        {
            return type switch
            {
                PdfParagraphAlignmentType.Center => ParagraphAlignment.Center,
                PdfParagraphAlignmentType.Left => ParagraphAlignment.Left,
                PdfParagraphAlignmentType.Right => ParagraphAlignment.Right,
                _ => ParagraphAlignment.Justify,
            };
        }
        private static void DefineStyles(Document document)
        {
            var style = document.Styles["Normal"];
            style.Font.Name = "Times New Roman";
            style.Font.Size = 14;
            style = document.Styles.AddStyle("NormalTitle", "Normal");
            style.Font.Bold = true;
        }
        protected void CreateParagraph(PdfParagraph pdfParagraph)
        {
            if (_section == null)
            {
                return;
            }
            var paragraph = _section.AddParagraph(pdfParagraph.Text);
            paragraph.Format.SpaceAfter = "1cm";
            paragraph.Format.Alignment = GetParagraphAlignment(pdfParagraph.ParagraphAlignment);
            paragraph.Style = pdfParagraph.Style;
        }
        protected void CreateTable(List<string> columns)
        {
            if (_document == null)
            {
                return;
            }
            _table = _document.LastSection.AddTable();
            foreach (var elem in columns)
            {
                _table.AddColumn(elem);
            }
        }
        protected void CreateRow(PdfRowParameters rowParameters)
        {
            if (_table == null)
            {
                return;
            }
            var row = _table.AddRow();
            for (int i = 0; i < rowParameters.Texts.Count; ++i)
            {
                row.Cells[i].AddParagraph(rowParameters.Texts[i]);
                if (!string.IsNullOrEmpty(rowParameters.Style))
                {
                    row.Cells[i].Style = rowParameters.Style;
                }
                Unit borderWidth = 0.5;
                row.Cells[i].Borders.Left.Width = borderWidth;
                row.Cells[i].Borders.Right.Width = borderWidth;
                row.Cells[i].Borders.Top.Width = borderWidth;
                row.Cells[i].Borders.Bottom.Width = borderWidth;
                row.Cells[i].Format.Alignment = GetParagraphAlignment(rowParameters.ParagraphAlignment);
                row.Cells[i].VerticalAlignment = VerticalAlignment.Center;
            }
        }
    }
}