using FluentAssertions;
using Jellyfin.Plugin.SRFPlay.Api.Models;
using Jellyfin.Plugin.SRFPlay.Configuration;
using Jellyfin.Plugin.SRFPlay.Services;
using Microsoft.Extensions.Logging;
using Moq;
using Xunit;

namespace Jellyfin.Plugin.SRFPlay.Tests.UnitTests;

/// <summary>
/// Unit tests for StreamUrlResolver.
/// </summary>
public class StreamUrlResolverTests : IDisposable
{
    private readonly Mock<ILogger<StreamUrlResolver>> _loggerMock;
    private readonly StreamUrlResolver _resolver;

    public StreamUrlResolverTests()
    {
        _loggerMock = new Mock<ILogger<StreamUrlResolver>>();
        _resolver = new StreamUrlResolver(_loggerMock.Object);
    }

    [Fact]
    public void GetStreamUrl_WithNullChapter_ReturnsNull()
    {
        // Act
        var result = _resolver.GetStreamUrl(null!, QualityPreference.Auto);

        // Assert
        result.Should().BeNull();
    }

    [Fact]
    public void GetStreamUrl_WithNoResources_ReturnsNull()
    {
        // Arrange
        var chapter = new Chapter
        {
            Id = "test-id",
            ResourceList = new List<Resource>()
        };

        // Act
        var result = _resolver.GetStreamUrl(chapter, QualityPreference.Auto);

        // Assert
        result.Should().BeNull();
    }

    [Fact]
    public void GetStreamUrl_WithDrmProtectedOnly_ReturnsNull()
    {
        // Arrange
        var chapter = new Chapter
        {
            Id = "test-id",
            ResourceList = new List<Resource>
            {
                new Resource
                {
                    Url = "https://example.com/stream.m3u8",
                    Protocol = "HLS",
                    Quality = "HD",
                    DrmList = new System.Text.Json.JsonElement() // Non-empty DRM
                }
            }
        };

        // Act
        var result = _resolver.GetStreamUrl(chapter, QualityPreference.Auto);

        // Assert
        result.Should().BeNull();
    }

    [Fact]
    public void HasPlayableContent_WithNonDrmHlsStream_ReturnsTrue()
    {
        // Arrange
        var chapter = new Chapter
        {
            ResourceList = new List<Resource>
            {
                new Resource
                {
                    Url = "https://example.com/stream.m3u8",
                    Protocol = "HLS",
                    Quality = "HD",
                    DrmList = null
                }
            }
        };

        // Act
        var result = _resolver.HasPlayableContent(chapter);

        // Assert
        result.Should().BeTrue();
    }

    [Fact]
    public void HasPlayableContent_WithDrmOnly_ReturnsFalse()
    {
        // Arrange
        var chapter = new Chapter
        {
            ResourceList = new List<Resource>
            {
                new Resource
                {
                    Url = "https://example.com/stream.m3u8",
                    Protocol = "HLS",
                    DrmList = new System.Text.Json.JsonElement() // Non-empty DRM
                }
            }
        };

        // Act
        var result = _resolver.HasPlayableContent(chapter);

        // Assert
        result.Should().BeFalse();
    }

    [Fact]
    public void IsContentExpired_WithFutureValidTo_ReturnsFalse()
    {
        // Arrange
        var chapter = new Chapter
        {
            ValidTo = DateTime.UtcNow.AddDays(7)
        };

        // Act
        var result = _resolver.IsContentExpired(chapter);

        // Assert
        result.Should().BeFalse();
    }

    [Fact]
    public void IsContentExpired_WithPastValidTo_ReturnsTrue()
    {
        // Arrange
        var chapter = new Chapter
        {
            ValidTo = DateTime.UtcNow.AddDays(-1)
        };

        // Act
        var result = _resolver.IsContentExpired(chapter);

        // Assert
        result.Should().BeTrue();
    }

    [Fact]
    public void IsContentExpired_WithNullValidTo_ReturnsFalse()
    {
        // Arrange
        var chapter = new Chapter
        {
            ValidTo = null
        };

        // Act
        var result = _resolver.IsContentExpired(chapter);

        // Assert
        result.Should().BeFalse();
    }

    public void Dispose()
    {
        _resolver?.Dispose();
    }
}