using System;
using Paca.Mobile.Core;
using Xunit;

namespace Paca.Tests.Core;

public class StreamHighlightClipperGateTests
{
    [Fact]
    public void Gate281_StreamHighlightClipper_BuildsLosslessCutArgs()
    {
        var args = StreamHighlightClipper.BuildFfmpegArgs("input.mp4", "output_clip.mp4", startSec: 10.5, durationSec: 30.0, ClipOutputFormat.Mp4Lossless);

        Assert.Contains("-ss 10.5", args);
        Assert.Contains("-t 30", args);
        Assert.Contains("-c copy", args);
    }

    [Fact]
    public void Gate282_StreamHighlightClipper_BuildsHighQualityGifArgs()
    {
        var args = StreamHighlightClipper.BuildFfmpegArgs("input.mp4", "output.gif", startSec: 5.0, durationSec: 8.0, ClipOutputFormat.AnimatedGif);

        Assert.Contains("-ss 5", args);
        Assert.Contains("-t 8", args);
        Assert.Contains("palettegen", args);
        Assert.Contains("paletteuse", args);
    }

    [Fact]
    public void Gate283_StreamHighlightClipper_ValidatesClipBounds()
    {
        // Negative start clamped to 0
        var args = StreamHighlightClipper.BuildFfmpegArgs("input.mp4", "out.mp4", startSec: -5.0, durationSec: 10.0, ClipOutputFormat.Mp4Lossless);
        Assert.Contains("-ss 0", args);

        // Zero or negative duration throws
        Assert.Throws<ArgumentOutOfRangeException>(() =>
            StreamHighlightClipper.BuildFfmpegArgs("input.mp4", "out.mp4", startSec: 10, durationSec: 0, ClipOutputFormat.Mp4Lossless));
    }

    [Fact]
    public void Gate284_StreamHighlightClipper_CalculatesOutputName()
    {
        var outMp4 = StreamHighlightClipper.GenerateOutputFileName("MyStream.mp4", startSec: 45.0, durationSec: 15.0, ClipOutputFormat.Mp4Lossless);
        Assert.Equal("MyStream_clip_45s_15s.mp4", outMp4);

        var outGif = StreamHighlightClipper.GenerateOutputFileName("MyStream.mp4", startSec: 120.0, durationSec: 5.0, ClipOutputFormat.AnimatedGif);
        Assert.Equal("MyStream_clip_120s_5s.gif", outGif);
    }
}