using Microsoft.EntityFrameworkCore;
using StackExchange.Redis;
using Vanguard.Server.Configuration;
using Vanguard.Server.Matches;
using Vanguard.Server.Matchmaking;
using Vanguard.Server.Storage;
using Vanguard.Server.Tickets;
using Vanguard.Shared.Protocol;

namespace Vanguard.Server.Tests;

/// <summary>
/// Проверки настоящих PostgreSQL и Redis. Запускаются только при заданных
/// переменных окружения:
///   VANGUARD_TEST_POSTGRES — connection string к отдельной тестовой БД;
///   VANGUARD_TEST_REDIS    — configuration Redis (лучше отдельный DB).
///
/// Postgres-тест делает EnsureDeleted/EnsureCreated, поэтому БД должна быть
/// заведомо тестовой.
/// </summary>
public class ExternalStorageTests
{
    private static readonly DateTimeOffset Start = new(2026, 10, 21, 12, 0, 0, TimeSpan.Zero);

    [Fact]
    public async Task Postgres_Store_RoundTrips_Header_And_Intents()
    {
        var connectionString = Environment.GetEnvironmentVariable("VANGUARD_TEST_POSTGRES");
        if (string.IsNullOrWhiteSpace(connectionString))
            return;

        var time = new FakeTimeProvider(Start);
        var options = new DbContextOptionsBuilder<MatchDbContext>()
            .UseNpgsql(connectionString)
            .Options;

        await using (var db = new MatchDbContext(options))
        {
            await db.Database.EnsureDeletedAsync();
            await db.Database.EnsureCreatedAsync();
        }

        var store = new EfMatchStore(new TestDbContextFactory(options), time);
        var deck = ServerTestData.BuildDeck();

        var header = new MatchHeader(
            "pg-1", GameMode.ClassicRanked, "p1", "p2", deck, deck, 7,
            time.GetUtcNow(), Started: false, 300_000, 300_000,
            TurnDeadline: null,
            AbsentSince0: time.GetUtcNow(),
            AbsentSince1: time.GetUtcNow(),
            LastClockSent: time.GetUtcNow(),
            IsFinished: false, Winner: -1, FinishedAt: null,
            FinishReason: MatchFinishReason.Normal, EventSeq: 1);

        await store.CreateAsync(header);
        await store.AppendIntentAsync(
            header with { EventSeq = 2 },
            new PersistedIntent("i1", 0, "finishMulligan", true, IntentRejectCode.None, null, 2));

        var loaded = await store.GetAsync("pg-1");

        Assert.NotNull(loaded);
        Assert.Equal(7UL, loaded!.Header.Seed);
        Assert.Equal(deck, loaded.Header.Deck0);
        Assert.Single(loaded.Intents);
        Assert.Equal("i1", loaded.Intents[0].IntentId);

        var unfinished = await store.LoadUnfinishedAsync(time.GetUtcNow().AddMinutes(-1));
        Assert.Single(unfinished);
    }

    [Fact]
    public async Task Redis_Ticket_And_Queue_Stores_Work()
    {
        var configuration = Environment.GetEnvironmentVariable("VANGUARD_TEST_REDIS");
        if (string.IsNullOrWhiteSpace(configuration))
            return;

        await using var redis = await ConnectionMultiplexer.ConnectAsync(configuration);

        var options = new RedisOptions
        {
            Configuration = configuration,
            Prefix = $"vgtest:{Guid.NewGuid():N}:",
        };

        var time = new FakeTimeProvider(Start);
        var game = ServerTestData.SmallOptions();

        var tickets = new GameTicketService(
            new RedisTicketStore(redis, options, time), game, time);

        var ticket = await tickets.IssueAsync("p1", "m1", 0);
        var redeemed = await tickets.RedeemAsync(ticket.Token);

        Assert.NotNull(redeemed);
        Assert.Equal("p1", redeemed!.PlayerId);
        Assert.Equal(0, redeemed.Seat);
        Assert.Null(await tickets.RedeemAsync(ticket.Token));

        var queue = new RedisQueueStore(redis, options, game);
        var entry = new QueueEntrySnapshot(
            Guid.NewGuid(),
            "p1",
            ServerTestData.BuildDeck(),
            GameMode.ClassicRanked,
            1000,
            time.GetUtcNow(),
            1,
            QueueEntryState.Queued,
            null,
            -1,
            null,
            null,
            null);

        await queue.SaveAsync(entry);

        var loaded = await queue.LoadQueuedAsync();
        Assert.Single(loaded);
        Assert.Equal(entry.QueueId, loaded[0].QueueId);
        Assert.Equal(entry.PlayerId, loaded[0].PlayerId);

        await queue.RemoveAsync(entry.QueueId, entry.Mode);
        Assert.Empty(await queue.LoadQueuedAsync());
    }

    private sealed class TestDbContextFactory : IDbContextFactory<MatchDbContext>
    {
        private readonly DbContextOptions<MatchDbContext> _options;

        public TestDbContextFactory(DbContextOptions<MatchDbContext> options) => _options = options;

        public MatchDbContext CreateDbContext() => new(_options);
    }
}