using System.IO;
using Paca.App.Core;
using Paca.App.ViewModels;
using Paca.Browser;
using Paca.Browser.Tabs;
using Paca.Core.Config;
using Paca.Core.Detection;
using Paca.Core.Platform;
using Paca.Core.Utils;

namespace Paca.Tests.Infrastructure;

public sealed class MockPipelineProcessRunner : IProcessRunner
{
    public List<ProcessSpec> Specs { get; } = new();

    public Task<ProcessResult> RunAsync(ProcessSpec spec, Action<string, string>? onLine, CancellationToken ct)
    {
        Specs.Add(spec);
        return Task.FromResult(new ProcessResult(0, "OK", ""));
    }
}

public sealed class MockPipelineCloudStorageClient : ICloudStorageClient
{
    public List<string> UploadedList { get; } = new();

    public Task<bool> UploadAsync(string localFilePath, string remoteDestination, Action<long, long>? onProgress, CancellationToken ct)
    {
        UploadedList.Add($"{localFilePath} -> {remoteDestination}");
        return Task.FromResult(true);
    }

    public Task<bool> ExistsAsync(string remoteDestination, CancellationToken ct)
    {
        return Task.FromResult(UploadedList.Any(u => u.EndsWith(remoteDestination)));
    }
}

/// <summary>
/// 40개 마일스톤 전 영역 통합 오케스트레이션 파이프라인 하네스.
/// </summary>
public sealed class GrandUnifiedPipeline : IDisposable
{
    public string TempDir { get; }
    public AppConfig Config { get; }
    public TabManager TabManager { get; }
    public AdBlockRuleEngine AdBlockEngine { get; }
    public MemoryTurboGuard MemoryGuard { get; }
    public DownloadManager DownloadManager { get; }
    public VideoDeduplicator Deduplicator { get; }
    public QoSTrafficShaper TrafficShaper { get; }
    public ChaosMonkeyStressDefense ChaosDefense { get; }
    public AudioNormalizer AudioNormalizer { get; }
    public HdrToneMapper HdrToneMapper { get; }
    public ChapterSplitter ChapterSplitter { get; }
    public DualSubtitleEngine DualSubtitleEngine { get; }
    public CloudSyncGateway CloudGateway { get; }
    public MockPipelineProcessRunner ProcessRunner { get; }
    public MockPipelineCloudStorageClient CloudClient { get; }

    private readonly List<DownloadItemViewModel> _detectedItems = new();

    private GrandUnifiedPipeline()
    {
        TempDir = Path.Combine(Path.GetTempPath(), "VD_Grand_" + Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(TempDir);

        Config = new AppConfig
        {
            OutputFolder = Path.Combine(TempDir, "downloads")
        };
        Directory.CreateDirectory(Config.OutputFolder);

        ProcessRunner = new MockPipelineProcessRunner();
        CloudClient = new MockPipelineCloudStorageClient();

        TabManager = new TabManager(() => new TabItem(), _ => { });
        AdBlockEngine = new AdBlockRuleEngine();
        MemoryGuard = new MemoryTurboGuard(TimeSpan.FromMinutes(10));

        DownloadManager = new DownloadManager(
            Config,
            _ => Task.FromResult(new List<Microsoft.Web.WebView2.Core.CoreWebView2Cookie>()),
            _ => { });

        DownloadManager.ItemDetected += item => _detectedItems.Add(item);

        Deduplicator = new VideoDeduplicator(maxHammingThreshold: 5);
        TrafficShaper = new QoSTrafficShaper(maxBandwidthBytesPerSec: 10_000_000);
        ChaosDefense = new ChaosMonkeyStressDefense(failureRate: 0.3);
        AudioNormalizer = new AudioNormalizer(ProcessRunner);
        HdrToneMapper = new HdrToneMapper(ProcessRunner);
        ChapterSplitter = new ChapterSplitter(ProcessRunner);
        DualSubtitleEngine = new DualSubtitleEngine();
        CloudGateway = new CloudSyncGateway(CloudClient);
    }

    public static GrandUnifiedPipeline Create() => new();

    public IReadOnlyList<DownloadItemViewModel> DetectedItems => _detectedItems;

    public void SimulateWebRequest(string url, MediaKind? mediaKind = null, string? pageUrl = null)
    {
        var uri = new Uri(url);

        // 1. 광고 차단 검사
        if (AdBlockEngine.ShouldBlock(uri))
            return;

        // 2. 미디어 감지
        if (mediaKind.HasValue)
        {
            DownloadManager.OnDetected(new DetectionContext(url, pageUrl ?? "https://test.local", mediaKind.Value));
        }
    }

    public void Dispose()
    {
        if (Directory.Exists(TempDir))
        {
            try { Directory.Delete(TempDir, true); } catch { }
        }
    }
}