using MeetingAssistant;
using MeetingAssistant.LaunchProfiles;
using MeetingAssistant.Transcription;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;

namespace MeetingAssistant.Tests;

public sealed class PyannoteDiarizationWarmupHostedServiceTests
{
    [Fact]
    public async Task HostedServiceWarmsEnabledValidationRuntimeWithoutBlockingStartup()
    {
        var commandRunner = new BlockingCommandRunner();
        var finalizer = new PyannoteTranscriptFinalizer(
            commandRunner,
            Options.Create(new MeetingAssistantOptions()),
            NullLogger<PyannoteTranscriptFinalizer>.Instance);
        var service = new PyannoteDiarizationWarmupHostedService(
            finalizer,
            new FakeLaunchProfileOptionsProvider(new MeetingAssistantOptions
            {
                Recording = { TranscriptionProvider = "azure-speech" },
                SpeakerIdentification =
                {
                    PyannoteValidation =
                    {
                        Enabled = true,
                        Diarization =
                        {
                            Enabled = true,
                            DockerCommand = "docker",
                            Image = "meeting-assistant-pyannote-validation:local",
                            ModelsFolder = Path.Combine(
                                Path.GetTempPath(),
                                "meeting-assistant-tests",
                                Guid.NewGuid().ToString("N"),
                                "models"),
                            Token = "hf_test",
                            TokenEnv = "",
                            CommandTimeout = TimeSpan.FromMinutes(1)
                        }
                    }
                }
            }),
            NullLogger<PyannoteDiarizationWarmupHostedService>.Instance);

        await service.StartAsync(CancellationToken.None).WaitAsync(TimeSpan.FromSeconds(1));
        await commandRunner.WaitForRunAsync();

        await service.StopAsync(CancellationToken.None);

        Assert.Contains(commandRunner.Commands, command => command.Arguments.Contains("meeting-assistant-pyannote-validation:local"));
        Assert.True(commandRunner.RunCancellationWasObserved);
    }

    private sealed class FakeLaunchProfileOptionsProvider : ILaunchProfileOptionsProvider
    {
        private readonly MeetingAssistantOptions options;

        public FakeLaunchProfileOptionsProvider(MeetingAssistantOptions options)
        {
            this.options = options;
        }

        public LaunchProfile GetRequiredProfile(string? name)
        {
            return new LaunchProfile(ConfigurationLaunchProfileOptionsProvider.DefaultProfileName, options);
        }

        public IReadOnlyList<LaunchProfile> GetProfiles()
        {
            return [GetRequiredProfile(null)];
        }

        public IReadOnlyList<LaunchProfileHotkey> GetHotkeys()
        {
            return [];
        }
    }

    private sealed class BlockingCommandRunner : ICommandRunner
    {
        private readonly TaskCompletionSource runStarted = new(TaskCreationOptions.RunContinuationsAsynchronously);

        public IReadOnlyList<CapturedCommand> Commands { get; private set; } = [];

        public bool RunCancellationWasObserved { get; private set; }

        public Task WaitForRunAsync()
        {
            return runStarted.Task.WaitAsync(TimeSpan.FromSeconds(5));
        }

        public async Task<CommandResult> RunAsync(
            string fileName,
            IReadOnlyList<string> arguments,
            CancellationToken cancellationToken,
            IReadOnlyDictionary<string, string>? environment = null)
        {
            Commands = Commands.Append(new CapturedCommand(fileName, arguments)).ToList();
            if (arguments.Contains("inspect"))
            {
                return new CommandResult(0, "image-id", "");
            }

            runStarted.TrySetResult();
            try
            {
                await Task.Delay(Timeout.InfiniteTimeSpan, cancellationToken);
            }
            catch (OperationCanceledException)
            {
                RunCancellationWasObserved = true;
                throw;
            }

            return new CommandResult(0, "", "");
        }
    }

    private sealed record CapturedCommand(string FileName, IReadOnlyList<string> Arguments);
}