using System.Net;
using FinalFactory.Rendezvous.Contracts;
using FinalFactory.Rendezvous.Server.JoinAttempts;
using FinalFactory.Rendezvous.Server.Provisioning;
using FinalFactory.Rendezvous.Server.State;
using FinalFactory.Rendezvous.Tests.Provisioning;
using FinalFactory.Rendezvous.Tests.Sessions;

namespace FinalFactory.Rendezvous.Tests.JoinAttempts;

internal sealed class JoinAttemptFixture : IDisposable
{
    private int _sequence;

    public JoinAttemptFixture(
        EphemeralStoreOptions? options = null,
        GamePolicyOptions? joinPolicy = null)
    {
        Sessions = new(options);
        Cursors = new();
        GamePolicyRegistry policies = GamePolicyRegistry.Create([
            joinPolicy ?? ProvisioningTestData.CreatePolicy(),
        ]);
        Service = new(policies, Sessions.Store, Sessions.Capabilities, Cursors, Sessions.Clock);
        ClientSubject = Service.CreateAnonymousClientSubject(IPAddress.Parse("198.51.100.40"));
    }

    public SessionLeaseFixture Sessions { get; }
    public JoinAttemptCursorCodec Cursors { get; }
    public JoinAttemptService Service { get; }
    public string ClientSubject { get; }

    public (RegisterSessionResponse Registration, StoredListing Listing) CreateHost(bool bindPresence = true)
    {
        RegisterSessionResponse registration = Sessions.Register();
        if (bindPresence)
        {
            Assert.True(Sessions.BindPresence(registration).Succeeded);
        }

        StoredListing listing = Sessions.Store.GetListing(registration.ListingId, false).Value!;
        return (registration, listing);
    }

    public CreateJoinAttemptRequest Request(
        SessionListingId listingId,
        string? idempotencyKey = null) => new()
        {
            IdempotencyKey = idempotencyKey ?? $"join-{Interlocked.Increment(ref _sequence)}",
            GameId = Sessions.Scope.GameId,
            EnvironmentId = Sessions.Scope.EnvironmentId,
            ListingId = listingId,
            ProtocolVersion = 7,
        };

    public CreateJoinAttemptResponse Create(
        SessionListingId listingId,
        string? idempotencyKey = null)
    {
        JoinAttemptServiceResult<CreateJoinAttemptResponse> result = Service.Create(
            ClientSubject,
            Request(listingId, idempotencyKey));
        Assert.True(result.Succeeded);
        return Assert.IsType<CreateJoinAttemptResponse>(result.Value);
    }

    public StoredJoinAttempt GetAttempt(
        RegisterSessionResponse registration,
        JoinAttemptId attemptId)
    {
        Assert.True(Sessions.Capabilities.TryFingerprint(
            registration.LeaseToken,
            out SecretFingerprint leaseFingerprint));
        IReadOnlyList<StoredJoinAttempt> attempts = Sessions.Store.BrowseHostJoinAttempts(new(
            registration.ListingId,
            leaseFingerprint,
            ContractLimits.BrowserPageMaxItems)).Value!;
        return attempts.Single(attempt => attempt.AttemptId == attemptId);
    }

    public IntroductionEndpoints Introduce(
        RegisterSessionResponse registration,
        CreateJoinAttemptResponse created)
    {
        StoredJoinAttempt attempt = GetAttempt(registration, created.AttemptId);
        HostJoinAttempt host = Service.BrowseForHost(
            registration.ListingId,
            ContractLimits.ContractVersion,
            registration.LeaseToken,
            ContractLimits.BrowserPageMaxItems,
            null).Value!.Items.Single(item => item.AttemptId == created.AttemptId);
        Assert.True(Sessions.Capabilities.TryFingerprint(
            host.HostPunchCapability,
            out SecretFingerprint hostFingerprint));
        Assert.True(Sessions.Capabilities.TryFingerprint(
            created.ClientPunchCapability,
            out SecretFingerprint clientFingerprint));
        Assert.True(Sessions.Store.BindAttemptEndpoint(new(
            attempt.MediationHandle,
            AttemptPeerRole.Host,
            hostFingerprint,
            new(AddressFamilyKind.Ipv4, "203.0.113.20", 41_000),
            null)).Succeeded);
        Assert.True(Sessions.Store.BindAttemptEndpoint(new(
            attempt.MediationHandle,
            AttemptPeerRole.Client,
            clientFingerprint,
            new(AddressFamilyKind.Ipv4, "198.51.100.40", 42_000),
            null)).Succeeded);
        StoreResult<IntroductionEndpoints> introduced = Sessions.Store.ConsumeIntroduction(
            attempt.MediationHandle);
        Assert.True(introduced.Succeeded);
        return introduced.Value!;
    }

    public void Dispose()
    {
        Cursors.Dispose();
        Sessions.Dispose();
    }
}