using DocumentService.Application.Common.DTOs.Requests;
using DocumentService.Domain.Models.ValueObjects;
using FluentAssertions;

namespace DocumentService.Tests.Live.API;

/// <summary>
/// Live tests for PDF operations: merge, annotate, stamp.
/// Uses PdfOperationsClient — routes managed by the client.
/// Target: http://172.24.12.39:9393/
/// </summary>
[Collection("Live API")]
public class PdfOperationsLiveTests : LiveApiTestBase
{
    // ══════════════════════════════════════════════════════════════
    // MERGE — MergeAsync(IEnumerable<Stream>) → multipart
    // ══════════════════════════════════════════════════════════════

    [Fact]
    public async Task Merge_Streams_TwoPdfs_ReturnsMergedPdfStream()
    {
        using var pdf1 = LoadPdfStream("valid.pdf");
        using var pdf2 = LoadPdfStream("valid.pdf");

        await using var merged = await OperationsClient.MergeAsync(new[] { pdf1, pdf2 });

        merged.Should().NotBeNull();
        merged.Length.Should().BeGreaterThan(0);
        // Merged must start with PDF magic bytes (%PDF = 0x25 0x50 0x44 0x46)
        var header = new byte[4];
        merged.ReadExactly(header, 0, 4);
        header.Should().Equal(new byte[] { 0x25, 0x50, 0x44, 0x46 },
            "merged result must be a valid PDF");
    }

    [Fact]
    public async Task Merge_Streams_ThreePdfs_ReturnsMergedPdfStream()
    {
        using var pdf1 = LoadPdfStream("valid.pdf");
        using var pdf2 = LoadPdfStream("valid.pdf");
        using var pdf3 = LoadPdfStream("valid.pdf");

        await using var merged = await OperationsClient.MergeAsync(new[] { pdf1, pdf2, pdf3 });

        merged.Should().NotBeNull();
        merged.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Merge_Streams_OnlyOnePdf_Throws()
    {
        using var pdf = LoadPdfStream("valid.pdf");

        var act = async () =>
        {
            await using var result = await OperationsClient.MergeAsync(new[] { pdf });
        };

        await act.Should().ThrowAsync<HttpRequestException>(
            "at least 2 PDFs are required; single PDF should return 400");
    }

    [Fact]
    public async Task Merge_Streams_CorruptedPdf_Throws()
    {
        byte[] garbage = "NOT A PDF"u8.ToArray();
        using var corrupted = new MemoryStream(garbage);
        using var valid = LoadPdfStream("valid.pdf");

        var act = async () =>
        {
            await using var result = await OperationsClient.MergeAsync(new[] { corrupted, valid });
        };

        await act.Should().ThrowAsync<HttpRequestException>(
            "corrupted PDF should return 500");
    }

    // ══════════════════════════════════════════════════════════════
    // MERGE — MergeAsync(IEnumerable<byte[]>) → Base64 JSON
    // ══════════════════════════════════════════════════════════════

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

        await using var merged = await OperationsClient.MergeAsync(new[] { pdf, pdf });

        merged.Should().NotBeNull();
        merged.Length.Should().BeGreaterThan(0);
    }

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

        await using var merged = await OperationsClient.MergeAsync(
            new[] { pdf, pdf },
            pageRanges: ["1", "1"]);

        merged.Should().NotBeNull();
        merged.Length.Should().BeGreaterThan(0);
    }

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

        var act = async () =>
        {
            await using var result = await OperationsClient.MergeAsync(new[] { pdf });
        };

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

    [Fact]
    public async Task Merge_Bytes_PageRangeExceedsPageCount_Throws()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf"); // 1-page PDF

        var act = async () =>
        {
            await using var result = await OperationsClient.MergeAsync(
                new[] { pdf, pdf },
                pageRanges: ["999-1000", null]);
        };

        await act.Should().ThrowAsync<HttpRequestException>(
            "out-of-bounds page range should return 400");
    }

    // ══════════════════════════════════════════════════════════════
    // ANNOTATE — AnnotateAsync(Stream, ...) → multipart
    // ══════════════════════════════════════════════════════════════

    [Fact]
    public async Task Annotate_Stream_TextMarkupHighlight_ReturnsAnnotatedPdf()
    {
        using var stream = LoadPdfStream("valid.pdf");
        var request = new AddAnnotationBase64Request
        {
            Base64Pdf = string.Empty, // not used in Stream overload
            AnnotationType = AnnotationType.TextMarkup,
            PageNumber = 1,
            X1 = 100, Y1 = 100, X2 = 300, Y2 = 120,
            TextMarkupStyle = TextMarkupStyle.Highlight,
            Color = "FFFF00",
            Author = "LiveTest"
        };

        await using var result = await OperationsClient.AnnotateAsync(stream, request);

        result.Should().NotBeNull();
        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Annotate_Stream_Underline_ReturnsAnnotatedPdf()
    {
        using var stream = LoadPdfStream("valid.pdf");
        var request = new AddAnnotationBase64Request
        {
            Base64Pdf = string.Empty,
            AnnotationType = AnnotationType.TextMarkup,
            PageNumber = 1,
            X1 = 50, Y1 = 700, X2 = 300, Y2 = 720,
            TextMarkupStyle = TextMarkupStyle.Underline
        };

        await using var result = await OperationsClient.AnnotateAsync(stream, request);

        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Annotate_Stream_Circle_ReturnsAnnotatedPdf()
    {
        using var stream = LoadPdfStream("valid.pdf");
        var request = new AddAnnotationBase64Request
        {
            Base64Pdf = string.Empty,
            AnnotationType = AnnotationType.Circle,
            PageNumber = 1,
            X1 = 100, Y1 = 200, X2 = 200, Y2 = 300,
            Color = "00FF00",
            Content = "Circle annotation"
        };

        await using var result = await OperationsClient.AnnotateAsync(stream, request);

        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Annotate_Stream_Square_ReturnsAnnotatedPdf()
    {
        using var stream = LoadPdfStream("valid.pdf");
        var request = new AddAnnotationBase64Request
        {
            Base64Pdf = string.Empty,
            AnnotationType = AnnotationType.Square,
            PageNumber = 1,
            X1 = 250, Y1 = 250, X2 = 350, Y2 = 350,
            Color = "0000FF"
        };

        await using var result = await OperationsClient.AnnotateAsync(stream, request);

        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Annotate_Stream_InvalidPageNumber_Throws()
    {
        using var stream = LoadPdfStream("valid.pdf");
        var request = new AddAnnotationBase64Request
        {
            Base64Pdf = string.Empty,
            AnnotationType = AnnotationType.FreeText,
            PageNumber = 9999, // exceeds page count
            X1 = 0, Y1 = 0, X2 = 100, Y2 = 100,
            Content = "Test"
        };

        var act = async () =>
        {
            await using var result = await OperationsClient.AnnotateAsync(stream, request);
        };

        await act.Should().ThrowAsync<HttpRequestException>(
            "invalid page number should return 400");
    }

    // ══════════════════════════════════════════════════════════════
    // ANNOTATE — AnnotateAsync(byte[], ...) → Base64 JSON
    // ══════════════════════════════════════════════════════════════

    [Fact]
    public async Task Annotate_Bytes_FreeText_ReturnsAnnotatedPdf()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddAnnotationBase64Request
        {
            Base64Pdf = string.Empty, // client fills this in
            AnnotationType = AnnotationType.FreeText,
            PageNumber = 1,
            X1 = 50, Y1 = 50, X2 = 200, Y2 = 100,
            Content = "Free text from live test",
            Author = "LiveTestRunner",
            Color = "FF0000"
        };

        await using var result = await OperationsClient.AnnotateAsync(pdf, request);

        result.Should().NotBeNull();
        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Annotate_Bytes_StickyNote_ReturnsAnnotatedPdf()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddAnnotationBase64Request
        {
            Base64Pdf = string.Empty,
            AnnotationType = AnnotationType.StickyNote,
            PageNumber = 1,
            X1 = 300, Y1 = 300, X2 = 320, Y2 = 320,
            Content = "Sticky note from live test",
            Author = "Reviewer"
        };

        await using var result = await OperationsClient.AnnotateAsync(pdf, request);

        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Annotate_Bytes_TextMarkupStrikeout_ReturnsAnnotatedPdf()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddAnnotationBase64Request
        {
            Base64Pdf = string.Empty,
            AnnotationType = AnnotationType.TextMarkup,
            PageNumber = 1,
            X1 = 60, Y1 = 600, X2 = 250, Y2 = 620,
            TextMarkupStyle = TextMarkupStyle.Strikeout,
            Color = "FF6600"
        };

        await using var result = await OperationsClient.AnnotateAsync(pdf, request);

        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Annotate_Bytes_FreeTextWithoutContent_Throws()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddAnnotationBase64Request
        {
            Base64Pdf = string.Empty,
            AnnotationType = AnnotationType.FreeText,
            PageNumber = 1,
            X1 = 0, Y1 = 0, X2 = 100, Y2 = 100
            // Content intentionally missing
        };

        var act = async () =>
        {
            await using var result = await OperationsClient.AnnotateAsync(pdf, request);
        };

        await act.Should().ThrowAsync<HttpRequestException>(
            "FreeText without content should return 400");
    }

    [Fact]
    public async Task Annotate_Bytes_TextMarkupWithoutStyle_Throws()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddAnnotationBase64Request
        {
            Base64Pdf = string.Empty,
            AnnotationType = AnnotationType.TextMarkup,
            PageNumber = 1,
            X1 = 0, Y1 = 0, X2 = 100, Y2 = 100
            // TextMarkupStyle intentionally missing
        };

        var act = async () =>
        {
            await using var result = await OperationsClient.AnnotateAsync(pdf, request);
        };

        await act.Should().ThrowAsync<HttpRequestException>(
            "TextMarkup without style should return 400");
    }

    // ══════════════════════════════════════════════════════════════
    // STAMP — StampAsync(Stream, ...) → multipart
    // ══════════════════════════════════════════════════════════════

    [Fact]
    public async Task Stamp_Stream_TextStamp_ReturnsStampedPdf()
    {
        using var stream = LoadPdfStream("valid.pdf");
        var request = new AddStampBase64Request
        {
            Base64Pdf = string.Empty,
            StampType = StampType.Text,
            X = 100, Y = 400,
            Text = "CONFIDENTIAL",
            FontSize = 24,
            Color = "FF0000",
            Opacity = 0.5
        };

        await using var result = await OperationsClient.StampAsync(stream, request);

        result.Should().NotBeNull();
        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Stamp_Stream_TextStamp_WithRotation_ReturnsStampedPdf()
    {
        using var stream = LoadPdfStream("valid.pdf");
        var request = new AddStampBase64Request
        {
            Base64Pdf = string.Empty,
            StampType = StampType.Text,
            X = 300, Y = 400,
            Text = "DRAFT",
            Rotation = 45,
            Opacity = 0.3,
            Placement = StampPlacement.Background
        };

        await using var result = await OperationsClient.StampAsync(stream, request);

        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Stamp_Stream_PredefinedStamp_Confidential_ReturnsStampedPdf()
    {
        using var stream = LoadPdfStream("valid.pdf");
        var request = new AddStampBase64Request
        {
            Base64Pdf = string.Empty,
            StampType = StampType.Predefined,
            X = 100, Y = 400,
            PredefinedType = PredefinedStampType.Confidential,
            Opacity = 0.6
        };

        await using var result = await OperationsClient.StampAsync(stream, request);

        result.Length.Should().BeGreaterThan(0);
    }

    // ══════════════════════════════════════════════════════════════
    // STAMP — StampAsync(byte[], ...) → Base64 JSON
    // ══════════════════════════════════════════════════════════════

    [Fact]
    public async Task Stamp_Bytes_TextStamp_ReturnsStampedPdf()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddStampBase64Request
        {
            Base64Pdf = string.Empty,
            StampType = StampType.Text,
            X = 100, Y = 400,
            Text = "APPROVED",
            FontName = "Arial",
            FontSize = 20,
            Color = "008000",
            Opacity = 0.7,
            Placement = StampPlacement.Foreground
        };

        await using var result = await OperationsClient.StampAsync(pdf, request);

        result.Should().NotBeNull();
        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Stamp_Bytes_WatermarkBackground_ReturnsStampedPdf()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddStampBase64Request
        {
            Base64Pdf = string.Empty,
            StampType = StampType.Text,
            X = 150, Y = 350,
            Text = "WATERMARK",
            FontSize = 36,
            Color = "AAAAAA",
            Opacity = 0.2,
            Rotation = 45,
            Placement = StampPlacement.Background
        };

        await using var result = await OperationsClient.StampAsync(pdf, request);

        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Stamp_Bytes_PredefinedStamp_Approved_ReturnsStampedPdf()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddStampBase64Request
        {
            Base64Pdf = string.Empty,
            StampType = StampType.Predefined,
            X = 100, Y = 400,
            PredefinedType = PredefinedStampType.Approved,
            Opacity = 0.8
        };

        await using var result = await OperationsClient.StampAsync(pdf, request);

        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Stamp_Bytes_PredefinedStamp_Draft_ReturnsStampedPdf()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddStampBase64Request
        {
            Base64Pdf = string.Empty,
            StampType = StampType.Predefined,
            X = 200, Y = 500,
            PredefinedType = PredefinedStampType.Draft,
            Opacity = 0.5
        };

        await using var result = await OperationsClient.StampAsync(pdf, request);

        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Stamp_Bytes_TextStampOnSpecificPage_ReturnsStampedPdf()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddStampBase64Request
        {
            Base64Pdf = string.Empty,
            StampType = StampType.Text,
            PageNumbers = [1],
            X = 200, Y = 500,
            Text = "PAGE 1 ONLY",
            Opacity = 0.5
        };

        await using var result = await OperationsClient.StampAsync(pdf, request);

        result.Length.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task Stamp_Bytes_TextStampWithoutText_Throws()
    {
        byte[] pdf = LoadPdfBytes("valid.pdf");
        var request = new AddStampBase64Request
        {
            Base64Pdf = string.Empty,
            StampType = StampType.Text,
            X = 100, Y = 400
            // Text intentionally missing
        };

        var act = async () =>
        {
            await using var result = await OperationsClient.StampAsync(pdf, request);
        };

        await act.Should().ThrowAsync<HttpRequestException>(
            "Text stamp without text should return 400");
    }
}