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

namespace Paca.Tests.Mobile;

/// <summary>
/// 모바일 & 데스크톱 융합 복합 E2E 사용자 여정 시나리오 (Gate 98 ~ Gate 102)
/// </summary>
public class MobileComplexJourneyTests
{
    [Fact]
    public void Gate98_Journey1_Discover_To_Enqueue_To_Pin_To_TurboDownload_Audit()
    {
        // 1. 모바일에서 YouTube URL 탐색
        var url = "https://www.youtube.com/watch?v=sample123";
        var detection = MobileDiscoveryEngine.DetectPlatform(url);
        Assert.True(detection.IsSupported);
        Assert.Equal("YouTube", detection.PlatformName);

        // 2. 큐 관리자에 등록
        var qm = new MobileQueueManager();
        var item1 = qm.Enqueue("https://example.com/other.mp4", "Other Video");
        var item2 = qm.Enqueue(url, "Trending Sample Video");

        // 3. 중요한 항목 상단 고정 (Pin to Top)
        qm.Pin(item2.Id);
        Assert.True(item2.IsPinned);
        Assert.Equal(item2.Id, qm.Items[0].Id); // 0번째 인덱스로 승격

        // 4. 터보 모드 설정 연계
        var cfg = new AppConfig();
        cfg.TurboModeEnabled = true;
        cfg.MaxConcurrentSegments = 16;
        Assert.True(cfg.TurboModeEnabled);
        Assert.Equal(16, cfg.MaxConcurrentSegments);
    }

    [Fact]
    public void Gate99_Journey2_NetworkLost_To_GuardPause_To_RestoredResume_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");

        item1.Status = MobileQueueStatus.Downloading;
        item2.Status = MobileQueueStatus.Downloading;

        var guard = new MobileNetworkGuard(qm);

        // 엘리베이터 진입으로 LTE/Wi-Fi 신호 상실
        guard.OnNetworkLost();
        Assert.Equal(MobileQueueStatus.PausedNetwork, item1.Status);
        Assert.Equal(MobileQueueStatus.PausedNetwork, item2.Status);

        // Wi-Fi 재연결 감지 시 자동 재개
        guard.OnNetworkRestored(isWifi: true);
        Assert.Equal(MobileQueueStatus.Downloading, item1.Status);
        Assert.Equal(MobileQueueStatus.Downloading, item2.Status);
    }

    [Fact]
    public void Gate100_Journey3_PcTabSync_To_RemoteDownload_To_FavoritesStash_Audit()
    {
        // 1. PC에서 열린 탭 동기화 수신
        var syncEngine = new MobileTabSyncEngine();
        var pcTabs = new List<RemoteTabInfo>
        {
            new("tab-101", "Spring Concert Live", "https://vimeo.com/998877")
        };
        syncEngine.UpdateRemoteTabs(pcTabs);
        Assert.Single(syncEngine.RemoteTabs);

        // 2. 모바일에서 원격 다운로드 요청
        string? downloadedUrl = null;
        syncEngine.OnRemoteDownloadRequested += u => downloadedUrl = u;
        syncEngine.RequestRemoteDownload("tab-101");
        Assert.Equal("https://vimeo.com/998877", downloadedUrl);

        // 3. 완료 후 모바일 보관함(Stash) 및 즐겨찾기에 등록
        var favManager = new MobileFavoritesManager();
        var fav = favManager.AddFavorite(downloadedUrl!, "Spring Concert Live", "음악");
        favManager.ToggleStash(fav.Id);

        Assert.True(fav.IsStashedForDownload);
        Assert.Equal("음악", fav.Tag);
    }

    [Fact]
    public void Gate101_Journey4_Deduplication_To_FailureRetry_Lifecycle_Audit()
    {
        var qm = new MobileQueueManager();
        var item = qm.Enqueue("https://example.com/stream.m3u8", "HLS Live Stream");
        item.Status = MobileQueueStatus.Downloading;

        // 서버 503 에러로 실패 발생
        item.Status = MobileQueueStatus.Failed;
        item.ErrorMessage = "HTTP 503 Service Unavailable";

        // 사용자 실패 항목 재시도 트리거
        var retried = qm.RetryFailedItems();
        Assert.Equal(1, retried);
        Assert.Equal(MobileQueueStatus.Queued, item.Status);
        Assert.Null(item.ErrorMessage);
    }

    [Fact]
    public void Gate102_Journey5_Preferences_Persistence_And_ThemeSwitch_Audit()
    {
        var settings = new MobileSettingsManager();
        settings.ThemeMode = MobileThemeMode.Dark;
        settings.SpeedLimitKbps = 5120; // 5MB/s
        settings.WifiOnlyDownload = true;
        settings.NotifyOnCompletion = true;

        var palette = MobileThemeSystem.GetPalette(settings.ThemeMode);
        Assert.Equal("#0B0C10", palette.Background);
        Assert.Equal("#5E56E8", palette.Accent);

        // 테마를 고대비로 전환
        settings.ThemeMode = MobileThemeMode.HighContrast;
        var hcPalette = MobileThemeSystem.GetPalette(settings.ThemeMode);
        Assert.Equal("#000000", hcPalette.Background);
        Assert.Equal("#FFFF00", hcPalette.Accent);
    }
}