using EnvelopeRenderer.Desktop.Core.Launch;

namespace EnvelopeRenderer.Desktop.Tests;

public class ProgressEventParserTests
{
    [Fact]
    public void TryParse_StartupLine_ParsesFields()
    {
        var parsed = ProgressEventParser.TryParse("PROGRESS startup elapsedMs=0 completed=0", out var progressEvent);

        Assert.True(parsed);
        Assert.Equal(ProgressEventKind.Startup, progressEvent!.Kind);
        Assert.Equal(0, progressEvent.ElapsedMs);
        Assert.Equal(0, progressEvent.Completed);
        Assert.Null(progressEvent.Reason);
    }

    [Fact]
    public void TryParse_RenderLine_ParsesFields()
    {
        var parsed = ProgressEventParser.TryParse("PROGRESS render elapsedMs=802 completed=1", out var progressEvent);

        Assert.True(parsed);
        Assert.Equal(ProgressEventKind.Render, progressEvent!.Kind);
        Assert.Equal(802, progressEvent.ElapsedMs);
        Assert.Equal(1, progressEvent.Completed);
        Assert.Null(progressEvent.Reason);
    }

    [Fact]
    public void TryParse_CompleteLine_ParsesFields()
    {
        var parsed = ProgressEventParser.TryParse("PROGRESS complete elapsedMs=1900 completed=392", out var progressEvent);

        Assert.True(parsed);
        Assert.Equal(ProgressEventKind.Complete, progressEvent!.Kind);
        Assert.Equal(1900, progressEvent.ElapsedMs);
        Assert.Equal(392, progressEvent.Completed);
        Assert.Null(progressEvent.Reason);
    }

    [Fact]
    public void TryParse_FailureLine_CapturesReasonToEndOfLineVerbatim()
    {
        const string line = "PROGRESS failure elapsedMs=1805 completed=392 reason=Failed to save PDF to 'out.pdf' (error code 999).";

        var parsed = ProgressEventParser.TryParse(line, out var progressEvent);

        Assert.True(parsed);
        Assert.Equal(ProgressEventKind.Failure, progressEvent!.Kind);
        Assert.Equal(1805, progressEvent.ElapsedMs);
        Assert.Equal(392, progressEvent.Completed);
        Assert.Equal("Failed to save PDF to 'out.pdf' (error code 999).", progressEvent.Reason);
    }

    [Fact]
    public void TryParse_ReasonContainingSpaces_KeepsWholeReasonTogether()
    {
        const string line = "PROGRESS failure elapsedMs=5 completed=0 reason=multiple words here";

        var parsed = ProgressEventParser.TryParse(line, out var progressEvent);

        Assert.True(parsed);
        Assert.Equal("multiple words here", progressEvent!.Reason);
    }

    [Theory]
    [InlineData(null)]
    [InlineData("")]
    [InlineData("   ")]
    [InlineData("not a progress line")]
    [InlineData("PROGRESS")]
    [InlineData("PROGRESS startup")]
    [InlineData("PROGRESS unknownkind elapsedMs=0 completed=0")]
    [InlineData("PROGRESS startup notElapsed=0 completed=0")]
    [InlineData("PROGRESS startup elapsedMs=abc completed=0")]
    [InlineData("PROGRESS startup elapsedMs=0 notCompleted=0")]
    [InlineData("PROGRESS startup elapsedMs=0 completed=abc")]
    [InlineData("PROGRESS startup elapsedMs=0 completed=0 notreason=x")]
    public void TryParse_MalformedOrUnrelatedLine_ReturnsFalseAndNullEvent(string? line)
    {
        var parsed = ProgressEventParser.TryParse(line, out var progressEvent);

        Assert.False(parsed);
        Assert.Null(progressEvent);
    }
}