using System;
using Paca.Core;
using Xunit;

namespace Paca.Tests.Core;

public class AudioVocalStemExtractorGateTests
{
    [Fact]
    public void Gate317_AudioVocalStemExtractor_BuildsKaraokeVocalRemovalFilter()
    {
        var filter = AudioVocalStemExtractor.BuildFfmpegStemFilter(AudioStemMode.VocalRemovalKaraoke);

        Assert.Contains("pan=stereo|c0=0.5*c0-0.5*c1|c1=0.5*c1-0.5*c0", filter);
    }

    [Fact]
    public void Gate318_AudioVocalStemExtractor_BuildsSpeechVoiceEnhanceFilter()
    {
        var filter = AudioVocalStemExtractor.BuildFfmpegStemFilter(AudioStemMode.VoiceEnhanceSpeechOnly);

        Assert.Contains("highpass=f=200", filter);
        Assert.Contains("lowpass=f=3400", filter);
        Assert.Contains("afftdn=nf=-25", filter);
    }

    [Fact]
    public void Gate319_AudioVocalStemExtractor_BuildsBassBoostFilter()
    {
        var filter = AudioVocalStemExtractor.BuildFfmpegStemFilter(AudioStemMode.BassBoost);

        Assert.Contains("bass=g=8:f=110:w=0.6", filter);
    }

    [Fact]
    public void Gate320_AudioVocalStemExtractor_BuildsFullCommandLine_Correctly()
    {
        var cmd = AudioVocalStemExtractor.BuildStemCommandLine(
            inputPath: "C:\\music\\song.mp3",
            outputPath: "C:\\music\\song_karaoke.mp3",
            mode: AudioStemMode.VocalRemovalKaraoke,
            audioCodec: "libmp3lame"
        );

        Assert.Contains("-i \"C:\\music\\song.mp3\"", cmd);
        Assert.Contains("-filter:a \"pan=stereo|c0=0.5*c0-0.5*c1|c1=0.5*c1-0.5*c0\"", cmd);
        Assert.Contains("-c:a libmp3lame -b:a 320k", cmd);
        Assert.EndsWith("\"C:\\music\\song_karaoke.mp3\" -y", cmd);
    }

    [Fact]
    public void Gate321_AudioVocalStemExtractor_BuildsIsolatedVocalsAcapellaFilter()
    {
        var filter = AudioVocalStemExtractor.BuildFfmpegStemFilter(AudioStemMode.IsolatedVocalsAcapella);

        Assert.Contains("0.5*c0+0.5*c1", filter);
        Assert.Contains("bandpass=f=1200", filter);
    }

    [Fact]
    public void Gate322_AudioVocalStemExtractor_BuildsNightModeDialogueNormalizationFilter()
    {
        var filter = AudioVocalStemExtractor.BuildFfmpegStemFilter(AudioStemMode.NightModeDialogueNormalization);

        Assert.Contains("dynaudnorm=f=150", filter);
    }

    [Fact]
    public void Gate323_AudioVocalStemExtractor_BuildsPodcastBroadcastSpeechFilter()
    {
        var filter = AudioVocalStemExtractor.BuildFfmpegStemFilter(AudioStemMode.PodcastBroadcastSpeech);

        Assert.Contains("highpass=f=80", filter);
        Assert.Contains("afftdn=nf=-20", filter);
    }
}