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 2 - not an LKAS statement, a working paper.
    // Retrofit 2026-07-22: flat list (no depth/indentation) - portrait, matching the
    // reference template's plain Account name | Debit | Credit table.
    public class TrialBalancePdfDocument(string companyName, string currencyCode, DateOnly asOfDate, List<TrialBalanceRowDto> 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, "Trial Balance", ReportPageHeader.PointInTimePeriodLine(asOfDate), currencyCode);

                page.Content().PaddingTop(10).Table(table =>
                {
                    table.ColumnsDefinition(columns =>
                    {
                        columns.RelativeColumn(2);
                        columns.RelativeColumn(5);
                        columns.RelativeColumn(2);
                        columns.RelativeColumn(2);
                    });

                    table.Header(header =>
                    {
                        header.Cell().Text("Account Code").Bold();
                        header.Cell().Text("Account Name").Bold();
                        header.Cell().AlignRight().Text("Debit").Bold();
                        header.Cell().AlignRight().Text("Credit").Bold();
                        header.Cell().ColumnSpan(4).PaddingTop(3).LineHorizontal(1);
                    });

                    foreach (var row in rows)
                    {
                        table.Cell().Text(row.AccountCode);
                        table.Cell().Text(row.AccountName);
                        table.Cell().AlignRight().Text(PdfFormatting.FormatAmountOrBlank(row.Debit));
                        table.Cell().AlignRight().Text(PdfFormatting.FormatAmountOrBlank(row.Credit));
                    }

                    var totalDebit = rows.Sum(r => r.Debit);
                    var totalCredit = rows.Sum(r => r.Credit);

                    table.Cell().ColumnSpan(4).PaddingTop(3).LineHorizontal(1);
                    table.Cell().Text("");
                    table.Cell().Text("TOTAL").Bold();
                    table.Cell().AlignRight().Text(PdfFormatting.FormatAmount(totalDebit)).Bold();
                    table.Cell().AlignRight().Text(PdfFormatting.FormatAmount(totalCredit)).Bold();
                });
            });
        }
    }
}