using General_Ledger_Service.DTOs.Reports;
using QuestPDF.Fluent;
using QuestPDF.Helpers;
using QuestPDF.Infrastructure;

namespace General_Ledger_Service.Services.PdfDocuments
{
    // 05_LKAS_Report_PDF_Templates.md Section 6 - one continuous table (not separate boxed
    // sections per account), account boundaries marked by an inline full-width group-header row.
    // Response is already sorted by accountCode then entryDate - no re-sorting needed here.
    public class GeneralLedgerPdfDocument(string companyName, string currencyCode, DateOnly periodStart, DateOnly periodEnd, List<GeneralLedgerLineDto> rows) : IDocument
    {
        public DocumentMetadata GetMetadata() => DocumentMetadata.Default;

        public void Compose(IDocumentContainer container)
        {
            container.Page(page =>
            {
                page.Size(PageSizes.A4);
                page.Margin(2, Unit.Centimetre);
                ReportPageHeader.Compose(page, companyName, "General Ledger", ReportPageHeader.RangePeriodLine(periodStart, periodEnd), currencyCode);

                page.Content().PaddingTop(10).Table(table =>
                {
                    table.ColumnsDefinition(columns =>
                    {
                        columns.RelativeColumn(2);
                        columns.RelativeColumn(4);
                        columns.RelativeColumn(3);
                        columns.RelativeColumn(2);
                        columns.RelativeColumn(2);
                        columns.RelativeColumn(2);
                    });

                    table.Header(header =>
                    {
                        header.Cell().Text("Date").Bold();
                        header.Cell().Text("Particulars").Bold();
                        header.Cell().Text("Description/Reference (J.R.)").Bold();
                        header.Cell().AlignRight().Text("Debit").Bold();
                        header.Cell().AlignRight().Text("Credit").Bold();
                        header.Cell().AlignRight().Text("Balance").Bold();
                        header.Cell().ColumnSpan(6).PaddingTop(3).LineHorizontal(1);
                    });

                    string? currentAccountCode = null;
                    foreach (var row in rows)
                    {
                        if (row.AccountCode != currentAccountCode)
                        {
                            currentAccountCode = row.AccountCode;
                            table.Cell().ColumnSpan(6).Background(Colors.Grey.Lighten3).Padding(3)
                                .Text($"Account: {row.AccountCode} — {row.AccountName}").Bold();
                        }

                        table.Cell().Text(row.EntryDate.ToString("yyyy-MM-dd"));
                        table.Cell().Text(row.Narration ?? string.Empty);
                        table.Cell().Text(row.JournalNo);
                        table.Cell().AlignRight().Text(PdfFormatting.FormatAmountOrBlank(row.DebitAmount));
                        table.Cell().AlignRight().Text(PdfFormatting.FormatAmountOrBlank(row.CreditAmount));
                        table.Cell().AlignRight().Text(PdfFormatting.FormatAmount(row.RunningBalance));
                    }

                    table.Cell().ColumnSpan(6).PaddingTop(3).LineHorizontal(1);
                });
            });
        }
    }
}