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

namespace Paca.Tests.Mobile;

/// <summary>
/// 모바일 프로덕션 7대 핵심 기능 게이트 (Gate 87 ~ Gate 92)
/// </summary>
public class MobileCoreFeaturesGateTests
{
    [Fact]
    public void Gate87_MobileDiscoveryEngine_UrlParsing_And_PlatformDetection_Audit()
    {
        // YouTube, Vimeo, Twitter, 일반 미디어 감지
        var yt = MobileDiscoveryEngine.DetectPlatform("https://www.youtube.com/watch?v=dQw4w9WgXcQ");
        Assert.Equal("YouTube", yt.PlatformName);
        Assert.True(yt.IsSupported);

        var vm = MobileDiscoveryEngine.DetectPlatform("https://vimeo.com/12345678");
        Assert.Equal("Vimeo", vm.PlatformName);
        Assert.True(vm.IsSupported);

        var general = MobileDiscoveryEngine.DetectPlatform("https://example.com/video.m3u8");
        Assert.Equal("HLS Stream", general.PlatformName);
        Assert.True(general.IsSupported);

        var unknown = MobileDiscoveryEngine.DetectPlatform("https://not-a-video.org/page.html");
        Assert.Equal("Web Page", unknown.PlatformName);
    }

    [Fact]
    public void Gate88_MobileQueueManager_Control_And_Retry_Audit()
    {
        var qm = new MobileQueueManager();
        var item1 = qm.Enqueue("https://example.com/v1.mp4", "Video 1");
        var item2 = qm.Enqueue("https://example.com/v2.mp4", "Video 2");

        Assert.Equal(2, qm.Items.Count);

        // 일시정지 & 재개
        qm.Pause(item1.Id);
        Assert.Equal(MobileQueueStatus.Paused, item1.Status);
        qm.Resume(item1.Id);
        Assert.Equal(MobileQueueStatus.Downloading, item1.Status);

        // 상단 고정 (Pin)
        qm.Pin(item2.Id);
        Assert.True(item2.IsPinned);

        // 실패 상태 설정 후 일괄 재시도 검증
        item1.Status = MobileQueueStatus.Failed;
        var retriedCount = qm.RetryFailedItems();
        Assert.Equal(1, retriedCount);
        Assert.Equal(MobileQueueStatus.Queued, item1.Status);

        // 완료 항목 정리
        item2.Status = MobileQueueStatus.Completed;
        qm.ClearCompleted();
        Assert.Single(qm.Items);
    }

    [Fact]
    public void Gate89_MobileFavoritesManager_Stash_And_Tagging_Audit()
    {
        var fm = new MobileFavoritesManager();
        var fav = fm.AddFavorite("https://example.com/movie.mp4", "Great Movie", "영화");

        Assert.Single(fm.Favorites);
        Assert.Equal("영화", fav.Tag);
        Assert.False(fav.IsStashedForDownload);

        // Stash(나중에 다운로드) 토글
        fm.ToggleStash(fav.Id);
        Assert.True(fav.IsStashedForDownload);

        // 태그 검색 필터
        var filtered = fm.GetByTag("영화");
        Assert.Single(filtered);
    }

    [Fact]
    public void Gate90_MobileTabSyncEngine_RemoteTabSync_Audit()
    {
        var sync = new MobileTabSyncEngine();
        Assert.Empty(sync.RemoteTabs);

        // PC 브라우저 탭 목록 동기화
        var remoteTabs = new List<RemoteTabInfo>
        {
            new("tab-1", "GitHub Paca Repo", "https://github.com/test/paca"),
            new("tab-2", "YouTube Video Stream", "https://youtube.com/watch?v=123")
        };
        sync.UpdateRemoteTabs(remoteTabs);

        Assert.Equal(2, sync.RemoteTabs.Count);
        Assert.Equal("GitHub Paca Repo", sync.RemoteTabs[0].Title);

        // 모바일에서 원격 다운로드 요청 이벤트 트리거
        string? requestedUrl = null;
        sync.OnRemoteDownloadRequested += url => requestedUrl = url;
        sync.RequestRemoteDownload("tab-2");

        Assert.Equal("https://youtube.com/watch?v=123", requestedUrl);
    }

    [Fact]
    public void Gate91_MobileSettingsManager_Preferences_Audit()
    {
        var settings = new MobileSettingsManager();
        Assert.True(settings.AutoRetryOnReconnect);
        Assert.False(settings.WifiOnlyDownload);
        Assert.Equal(0, settings.SpeedLimitKbps);
        Assert.Equal(MobileThemeMode.Dark, settings.ThemeMode);

        settings.WifiOnlyDownload = true;
        settings.SpeedLimitKbps = 2048;
        settings.ThemeMode = MobileThemeMode.Light;

        Assert.True(settings.WifiOnlyDownload);
        Assert.Equal(2048, settings.SpeedLimitKbps);
        Assert.Equal(MobileThemeMode.Light, settings.ThemeMode);
    }

    [Fact]
    public void Gate92_MobileNetworkGuard_AutoResume_Audit()
    {
        var qm = new MobileQueueManager();
        var guard = new MobileNetworkGuard(qm);

        var item = qm.Enqueue("https://example.com/video.mp4", "Test Video");
        item.Status = MobileQueueStatus.PausedNetwork;

        // 네트워크 복구 이벤트 발생
        guard.OnNetworkRestored(isWifi: true);

        // 네트워크 단절로 멈췄던 항목이 자동으로 재개되어야 함
        Assert.Equal(MobileQueueStatus.Downloading, item.Status);
    }
}