using System;
using Paca.Core;
using Xunit;

namespace Paca.Tests.Core;

public class VideoDenoiseEnhancerGateTests
{
    [Fact]
    public void Gate401_VideoDenoiseEnhancer_BuildsFastHqdn3dFilter()
    {
        var filter = VideoDenoiseEnhancer.BuildEnhanceFilterChain(denoise: true, sharpen: false, DenoisePreset.FastTemporalSpatial);

        Assert.Equal("hqdn3d=4:3:6:4.5", filter);
    }

    [Fact]
    public void Gate402_VideoDenoiseEnhancer_BuildsHighQualityNlmeansFilter()
    {
        var filter = VideoDenoiseEnhancer.BuildEnhanceFilterChain(denoise: true, sharpen: false, DenoisePreset.HighQualityNonLocalMeans);

        Assert.Contains("nlmeans=s=1.0:p=7:r=15", filter);
    }

    [Fact]
    public void Gate403_VideoDenoiseEnhancer_ChainsDenoiseAndSharpenFilters()
    {
        var filter = VideoDenoiseEnhancer.BuildEnhanceFilterChain(denoise: true, sharpen: true, DenoisePreset.FastTemporalSpatial);

        Assert.Contains("hqdn3d=4:3:6:4.5", filter);
        Assert.Contains("unsharp=5:5:0.8:5:5:0.4", filter);
    }

    [Fact]
    public void Gate404_VideoDenoiseEnhancer_BuildsFullCommandLine_WithAudioCopy()
    {
        var cmd = VideoDenoiseEnhancer.BuildDenoiseCommandLine(
            inputPath: "C:\\videos\\grainy.mp4",
            outputPath: "C:\\videos\\enhanced.mp4",
            denoise: true,
            sharpen: true
        );

        Assert.Contains("-i \"C:\\videos\\grainy.mp4\"", cmd);
        Assert.Contains("-vf \"hqdn3d=4:3:6:4.5,unsharp=5:5:0.8:5:5:0.4\"", cmd);
        Assert.Contains("-c:v libx264 -crf 20 -preset fast -c:a copy", cmd);
        Assert.EndsWith("\"C:\\videos\\enhanced.mp4\" -y", cmd);
    }
}