using System;
using System.Collections.Generic;
using Paca.Core;
using Xunit;

namespace Paca.Tests.Core;

public class HlsManifestValidatorGateTests
{
    [Fact]
    public void Gate441_HlsManifestValidator_DetectsMasterPlaylist_AndVariants()
    {
        var manifest = @"#EXTM3U
#EXT-X-STREAM-INF:BANDWIDTH=2500000,RESOLUTION=1280x720
720p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=5000000,RESOLUTION=1920x1080
1080p.m3u8";

        var result = HlsManifestValidator.Analyze(manifest);

        Assert.True(result.IsMasterPlaylist);
        Assert.Equal(2, result.Variants.Count);
        Assert.Equal(5000000, result.Variants[0].Bandwidth); // highest first
        Assert.Equal("1080p.m3u8", result.Variants[0].Uri);
        Assert.Equal("1920x1080", result.Variants[0].Resolution);
    }

    [Fact]
    public void Gate442_HlsManifestValidator_ParsesMediaPlaylist_Accurately()
    {
        var manifest = @"#EXTM3U
#EXT-X-TARGETDURATION:10
#EXTINF:10.0,
seg1.ts
#EXTINF:10.0,
seg2.ts
#EXTINF:5.5,
seg3.ts
#EXT-X-ENDLIST";

        var result = HlsManifestValidator.Analyze(manifest);

        Assert.False(result.IsMasterPlaylist);
        Assert.True(result.IsVod);
        Assert.False(result.IsLive);
        Assert.Equal(3, result.SegmentCount);
        Assert.Equal(25.5, result.TotalDurationSec, 1);
    }

    [Fact]
    public void Gate443_HlsManifestValidator_DetectsDiscontinuities_AndLiveStream()
    {
        var manifest = @"#EXTM3U
#EXT-X-TARGETDURATION:6
#EXTINF:6.0,
live1.ts
#EXT-X-DISCONTINUITY
#EXTINF:6.0,
live2.ts";

        var result = HlsManifestValidator.Analyze(manifest);

        Assert.True(result.IsLive);
        Assert.False(result.IsVod);
        Assert.Equal(1, result.DiscontinuityCount);
        Assert.Equal(2, result.SegmentCount);
    }

    [Fact]
    public void Gate444_HlsManifestValidator_StripsAdDiscontinuityBlocks()
    {
        var manifest = @"#EXTM3U
#EXTINF:10.0,
main1.ts
#EXT-X-DISCONTINUITY
#EXTINF:15.0,
ad1.ts
#EXT-X-DISCONTINUITY
#EXTINF:10.0,
main2.ts
#EXT-X-ENDLIST";

        // Ad duration 15.0s between discontinuities stripped
        var cleaned = HlsManifestValidator.StripAdBlocks(manifest, maxAdDurationSec: 30.0);

        Assert.Contains("main1.ts", cleaned);
        Assert.Contains("main2.ts", cleaned);
        Assert.DoesNotContain("ad1.ts", cleaned);
    }
}