using FluentAssertions;
using Marathon.Application.Abstractions;
using Marathon.Application.UseCases;
using Marathon.Domain.Entities;
using Marathon.Domain.Enums;
using Marathon.Domain.ValueObjects;
using Microsoft.Extensions.Logging.Abstractions;
using NSubstitute;

namespace Marathon.Application.Tests.UseCases;

public sealed class ResolvePendingBetsUseCaseTests
{
    private static readonly TimeSpan MoscowOffset = TimeSpan.FromHours(3);
    private static readonly DateTimeOffset Placed =
        new(2026, 5, 16, 12, 0, 0, MoscowOffset);

    private readonly IPlacedBetRepository _bets = Substitute.For<IPlacedBetRepository>();
    private readonly IResultRepository _results = Substitute.For<IResultRepository>();

    private ResolvePendingBetsUseCase CreateSut() =>
        new(_bets, _results, NullLogger<ResolvePendingBetsUseCase>.Instance);

    private static PlacedBet MakePending(EventId id, Side side = Side.Side1) =>
        new(
            Guid.NewGuid(), id,
            new Bet(MatchScope.Instance, BetType.Win, side, null, new OddsRate(2.10m)),
            100m, Placed, BetOutcome.Pending, null);

    [Fact]
    public async Task Should_ReturnZero_When_NoPendingBets()
    {
        _bets.ListByOutcomeAsync(BetOutcome.Pending, Arg.Any<CancellationToken>())
            .Returns(Array.Empty<PlacedBet>().ToList().AsReadOnly());

        var count = await CreateSut().ExecuteAsync(CancellationToken.None);

        count.Should().Be(0);
        await _bets.DidNotReceive().UpdateAsync(Arg.Any<PlacedBet>(), Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Should_GradeBetsWithResults_AndLeaveOthersAlone()
    {
        var idGraded = new EventId("event-1");
        var idUngraded = new EventId("event-2");

        _bets.ListByOutcomeAsync(BetOutcome.Pending, Arg.Any<CancellationToken>())
            .Returns(new[]
            {
                MakePending(idGraded, side: Side.Side1),
                MakePending(idUngraded, side: Side.Side2),
            }.ToList().AsReadOnly());

        _results.GetAsync(idGraded, Arg.Any<CancellationToken>())
            .Returns(new EventResult(idGraded, 2, 1, Side.Side1, DateTimeOffset.UtcNow));
        _results.GetAsync(idUngraded, Arg.Any<CancellationToken>())
            .Returns((EventResult?)null);

        var count = await CreateSut().ExecuteAsync(CancellationToken.None);

        count.Should().Be(1, "only event-1 has a result");
        await _bets.Received(1).UpdateAsync(
            Arg.Is<PlacedBet>(b => b.EventId == idGraded && b.Outcome == BetOutcome.Won),
            Arg.Any<CancellationToken>());
        await _bets.DidNotReceive().UpdateAsync(
            Arg.Is<PlacedBet>(b => b.EventId == idUngraded),
            Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Should_CacheResultLookups_PerEvent()
    {
        // Two pending bets on the same event — only one result fetch should fire.
        var id = new EventId("event-shared");

        _bets.ListByOutcomeAsync(BetOutcome.Pending, Arg.Any<CancellationToken>())
            .Returns(new[]
            {
                MakePending(id, side: Side.Side1),
                MakePending(id, side: Side.Side2),
            }.ToList().AsReadOnly());

        _results.GetAsync(id, Arg.Any<CancellationToken>())
            .Returns(new EventResult(id, 2, 1, Side.Side1, DateTimeOffset.UtcNow));

        await CreateSut().ExecuteAsync(CancellationToken.None);

        await _results.Received(1).GetAsync(id, Arg.Any<CancellationToken>());
    }
}