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

namespace Paca.Tests.Core;

public class PlaybackHistorySyncManagerGateTests
{
    [Fact]
    public void Gate449_PlaybackHistorySyncManager_RecordsProgress_AndCompletion()
    {
        // 96% completion -> marks finished, reset resume position
        var itemDone = PlaybackHistorySyncManager.CreateRecord("v1", "movie.mp4", 960.0, 1000.0, DateTime.UtcNow);
        Assert.True(itemDone.IsFinished);
        Assert.Equal(0.0, itemDone.ResumePositionSec);
        Assert.Equal(96.0, itemDone.CompletionPercent, 1);

        // 50% completion -> keeps resume position
        var itemMid = PlaybackHistorySyncManager.CreateRecord("v2", "show.mp4", 500.0, 1000.0, DateTime.UtcNow);
        Assert.False(itemMid.IsFinished);
        Assert.Equal(500.0, itemMid.ResumePositionSec);
    }

    [Fact]
    public void Gate440_PlaybackHistorySyncManager_IgnoresNearZero_Resumes()
    {
        var item = PlaybackHistorySyncManager.CreateRecord("v3", "clip.mp4", 3.0, 100.0, DateTime.UtcNow);
        Assert.Equal(0.0, item.ResumePositionSec);
    }

    [Fact]
    public void Gate451_PlaybackHistorySyncManager_MergesCrossDeviceRecords_ConflictResolution()
    {
        var dtDesktop = new DateTime(2026, 9, 4, 10, 0, 0, DateTimeKind.Utc);
        var dtMobile = new DateTime(2026, 9, 4, 11, 0, 0, DateTimeKind.Utc);

        var rDesktop = PlaybackHistorySyncManager.CreateRecord("v1", "doc.mp4", 300.0, 1000.0, dtDesktop);
        var rMobile = PlaybackHistorySyncManager.CreateRecord("v1", "doc.mp4", 600.0, 1000.0, dtMobile);

        var merged = PlaybackHistorySyncManager.Merge(rDesktop, rMobile);

        Assert.Equal(600.0, merged.ResumePositionSec);
        Assert.Equal(dtMobile, merged.LastPlayedAtUtc);
    }

    [Fact]
    public void Gate452_PlaybackHistorySyncManager_SerializesAndRestores_HistoryDatabase()
    {
        var list = new List<PlaybackHistoryRecord>
        {
            PlaybackHistorySyncManager.CreateRecord("v1", "a.mp4", 100.0, 500.0, DateTime.UtcNow),
            PlaybackHistorySyncManager.CreateRecord("v2", "b.mp4", 980.0, 1000.0, DateTime.UtcNow)
        };

        var json = PlaybackHistorySyncManager.ToJson(list);
        var restored = PlaybackHistorySyncManager.FromJson(json);

        Assert.NotNull(restored);
        Assert.Equal(2, restored.Count);
        Assert.Equal("v1", restored[0].MediaId);
        Assert.Equal("v2", restored[1].MediaId);
        Assert.True(restored[1].IsFinished);
    }
}