using DocumentService.Application.Common.DTOs;
using FluentAssertions;

namespace DocumentService.Tests.Live.API;

/// <summary>
/// Live tests for Swiss QR Code extraction endpoint.
/// Uses SwissQrCodeClient — routes managed by the client.
/// Target: http://172.24.12.39:9393/
/// </summary>
[Collection("Live API")]
public class SwissQrCodeLiveTests : LiveApiTestBase
{
    // ──────────────────────────────────────────────────────────────
    // ExtractAsync(Stream) → multipart → /api/pdf/qr-code/extract-swiss
    // ──────────────────────────────────────────────────────────────

    [Fact]
    public async Task Extract_Stream_PdfWithQrCode_ReturnsBillDetails()
    {
        using var stream = LoadPdfStream("pdfWithSwissQRCode.pdf");

        var result = await QrCodeClient.ExtractAsync(stream);

        result.Should().NotBeNull();
        result.Bill.Should().NotBeNull("bill data must be extracted");
        result.RawLines.Should().NotBeEmpty("raw QR payload lines must be present");

        // Swiss QR Bill Standard 2.0 payload always starts with "SPC"
        result.RawLines.Should().Contain(line => line == "SPC",
            "first SPC line is mandated by Swiss QR Bill Standard 2.0");
    }

    [Fact]
    public async Task Extract_Stream_PdfWithQrCode_BillHasMandatoryFields()
    {
        using var stream = LoadPdfStream("pdfWithSwissQRCode.pdf");

        var result = await QrCodeClient.ExtractAsync(stream);

        var bill = result.Bill;
        bill.Should().NotBeNull();
        bill!.Account.Should().NotBeNullOrEmpty("IBAN/QR-IBAN is mandatory per standard");
        bill.Creditor.Should().NotBeNull("Creditor is mandatory");
        bill.Creditor!.Name.Should().NotBeNullOrEmpty("Creditor name is mandatory");
    }

    [Fact]
    public async Task Extract_Stream_PdfWithoutQrCode_Throws404()
    {
        // valid.pdf has no QR code
        using var stream = LoadPdfStream("valid.pdf");

        var act = async () => await QrCodeClient.ExtractAsync(stream);

        // Client calls EnsureSuccessStatusCode → HttpRequestException on 404
        await act.Should().ThrowAsync<HttpRequestException>(
            "PDF without QR code must return 404");
    }

    [Fact]
    public async Task Extract_Stream_EmptyStream_Throws()
    {
        using var stream = new MemoryStream(Array.Empty<byte>());

        var act = async () => await QrCodeClient.ExtractAsync(stream);

        await act.Should().ThrowAsync<HttpRequestException>();
    }

    [Fact]
    public async Task Extract_Stream_WithRawFlag_ReturnsRawLines()
    {
        using var stream = LoadPdfStream("pdfWithSwissQRCode.pdf");

        // raw=true → API returns full unprocessed payload lines
        var result = await QrCodeClient.ExtractAsync(stream, raw: true);

        result.Should().NotBeNull();
        result.RawLines.Should().NotBeEmpty();
    }

    // ──────────────────────────────────────────────────────────────
    // ExtractAsync(byte[]) → Base64 JSON → /api/pdf/qr-code/extract-swiss
    // ──────────────────────────────────────────────────────────────

    [Fact]
    public async Task Extract_Bytes_PdfWithQrCode_ReturnsBillDetails()
    {
        byte[] bytes = LoadPdfBytes("pdfWithSwissQRCode.pdf");

        var result = await QrCodeClient.ExtractAsync(bytes);

        result.Should().NotBeNull();
        result.Bill.Should().NotBeNull();
        result.RawLines.Should().NotBeEmpty();
    }

    [Fact]
    public async Task Extract_Bytes_PdfWithQrCode_BillHasMandatoryFields()
    {
        byte[] bytes = LoadPdfBytes("pdfWithSwissQRCode.pdf");

        var result = await QrCodeClient.ExtractAsync(bytes);

        result.Bill!.Account.Should().NotBeNullOrEmpty();
        result.Bill.Creditor.Should().NotBeNull();
        result.Bill.Creditor!.Name.Should().NotBeNullOrEmpty();
    }

    [Fact]
    public async Task Extract_Bytes_PdfWithoutQrCode_Throws404()
    {
        byte[] bytes = LoadPdfBytes("valid.pdf");

        var act = async () => await QrCodeClient.ExtractAsync(bytes);

        await act.Should().ThrowAsync<HttpRequestException>(
            "PDF without QR code must return 404");
    }

    [Fact]
    public async Task Extract_Bytes_EmptyArray_Throws()
    {
        var act = async () => await QrCodeClient.ExtractAsync(Array.Empty<byte>());

        await act.Should().ThrowAsync<HttpRequestException>();
    }
}