using System;
using System.Linq;
using System.Threading.Tasks;
using Amazon.S3;
using Amazon.S3.Model;
using Dpz.Core.Service.ObjectStorage;
using Dpz.Core.Service.ObjectStorage.Services;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using NUnit.Framework;

namespace Dpz.Core.Server.ObjectStorage.Test;

/// <summary>
/// COS 视频服务集成测试
/// </summary>
[TestFixture]
public class CosVideoCloudServiceIntegrationTest
{
    private const string TestVideoM3U8 = "/Video/JingGuowang-One/1080p.m3u8";

    /// <summary>
    /// 对真实 COS 上的 m3u8 视频获取元数据：验证能解析出大于 0 的时长、非空的分片列表，
    /// 且各分片时长之和与总时长一致（精度 0.001）。
    /// </summary>
    [Test]
    public async Task GetVideoMetaAsync_WhenRealCosM3u8_ReturnsDurationAndSegments()
    {
        Assume.That(
            Environment.GetEnvironmentVariable("DPZ_ENABLE_COS_INTEGRATION_TESTS") == "1",
            "需要显式开启真实 COS 集成测试"
        );
        var service = CreateService();

        var result = await service.GetVideoMetaAsync(TestVideoM3U8);

        Assert.That(result.Success, Is.True, result.Message);
        Assert.That(result.Data, Is.Not.Null);
        Assert.Multiple(() =>
        {
            Assert.That(result.Data!.Duration, Is.GreaterThan(0));
            Assert.That(result.Data.Points, Is.Not.Empty);
            Assert.That(result.Data.Points.Sum(), Is.EqualTo(result.Data.Duration).Within(0.001));
        });
    }

    /// <summary>
    /// 对真实 COS 上的 m3u8 视频在 47 秒处截图：验证截图成功、返回的封面地址指向
    /// Video/JingGuowang-One/video.webp，且该封面已真实写入 COS（ContentType 为 image/jpeg）。
    /// 注意：本用例会真实写入并覆盖线上封面文件。
    /// </summary>
    [Test]
    public async Task VideoScreenshotAsync_WhenRealCosM3u8_UploadsCover()
    {
        Assume.That(
            Environment.GetEnvironmentVariable("DPZ_ENABLE_COS_INTEGRATION_TESTS") == "1",
            "需要显式开启真实 COS 集成测试"
        );
        var provider = CreateServiceProvider();
        var service = provider.GetRequiredService<IVideoCloudService>();
        var options = provider.GetRequiredService<S3ObjectStorageOptions>();
        var amazonS3 = provider.GetRequiredService<IAmazonS3>();

        var result = await service.VideoScreenshotAsync(TestVideoM3U8, TimeSpan.FromSeconds(47));

        Assert.That(result.Success, Is.True, result.Message);
        Assert.That(result.Data, Does.EndWith("/Video/JingGuowang-One/video.webp"));

        var metadata = await amazonS3.GetObjectMetadataAsync(
            new GetObjectMetadataRequest
            {
                BucketName = options.Bucket,
                Key = "Video/JingGuowang-One/video.webp",
            }
        );

        Assert.Multiple(() =>
        {
            Assert.That(metadata.Headers.ContentType, Is.EqualTo("image/jpeg"));
        });
    }

    private static IVideoCloudService CreateService()
    {
        return CreateServiceProvider().GetRequiredService<IVideoCloudService>();
    }

    private static ServiceProvider CreateServiceProvider()
    {
        var configuration = new ConfigurationBuilder().AddJsonFile("appsettings.Test.json").Build();
        var services = new ServiceCollection();
        services.AddSingleton<IConfiguration>(configuration);
        services.AddLogging(x => x.AddConsole());
        services.AddS3ObjectStorage();
        services.AddCosVideoSyncHandleService();
        return services.BuildServiceProvider();
    }
}