using Marathon.Application.Abstractions;
using Marathon.Application.Configuration;
using Marathon.Domain.Entities;
using Marathon.Domain.Enums;
using Marathon.Domain.ValueObjects;
using Microsoft.Extensions.Options;
using NSubstitute;

namespace Marathon.Application.Tests.UseCases;

/// <summary>
/// Shared factory helpers for domain objects used across use-case tests.
/// </summary>
internal static class TestFixtures
{
    private static readonly TimeSpan MoscowOffset = TimeSpan.FromHours(3);

    /// <summary>
    /// Bridges the legacy per-id <c>GetAsync</c> stubs to the batched
    /// <c>GetManyAsync</c> the use cases now call: each requested id is resolved
    /// through whatever <c>GetAsync</c> was configured to return for it. Lets the
    /// existing per-id <c>.Returns(...)</c> setups keep working unchanged.
    /// </summary>
    public static void BridgeGetMany(IEventRepository events)
    {
        events.GetManyAsync(Arg.Any<IReadOnlyCollection<EventId>>(), Arg.Any<CancellationToken>())
            .Returns(ci =>
            {
                var ids = ci.Arg<IReadOnlyCollection<EventId>>();
                var dict = new Dictionary<EventId, Event>();
                foreach (var id in ids.Distinct())
                {
                    var ev = events.GetAsync(id, CancellationToken.None).GetAwaiter().GetResult();
                    if (ev is not null) dict[id] = ev;
                }
                return (IReadOnlyDictionary<EventId, Event>)dict;
            });
    }

    /// <inheritdoc cref="BridgeGetMany(IEventRepository)"/>
    public static void BridgeGetMany(IResultRepository results)
    {
        results.GetManyAsync(Arg.Any<IReadOnlyCollection<EventId>>(), Arg.Any<CancellationToken>())
            .Returns(ci =>
            {
                var ids = ci.Arg<IReadOnlyCollection<EventId>>();
                var dict = new Dictionary<EventId, EventResult>();
                foreach (var id in ids.Distinct())
                {
                    var r = results.GetAsync(id, CancellationToken.None).GetAwaiter().GetResult();
                    if (r is not null) dict[id] = r;
                }
                return (IReadOnlyDictionary<EventId, EventResult>)dict;
            });
    }

    /// <summary>Creates a minimal valid <see cref="Event"/> with the given event ID string.</summary>
    public static Event MakeEvent(string eventIdValue = "12345678")
    {
        return new Event(
            Id: new EventId(eventIdValue),
            Sport: new SportCode(6),
            CountryCode: "BY",
            LeagueId: "league-1",
            Category: "Group A",
            ScheduledAt: new DateTimeOffset(2026, 5, 10, 18, 0, 0, MoscowOffset),
            Side1Name: "Team A",
            Side2Name: "Team B");
    }

    /// <summary>Creates a minimal valid <see cref="OddsSnapshot"/> for the given event.</summary>
    public static OddsSnapshot MakeSnapshot(EventId eventId, OddsSource source = OddsSource.PreMatch)
    {
        var bets = new List<Bet>
        {
            new Bet(MatchScope.Instance, BetType.Win, Side.Side1, value: null, new OddsRate(1.85m)),
            new Bet(MatchScope.Instance, BetType.Win, Side.Side2, value: null, new OddsRate(2.10m)),
        };

        return new OddsSnapshot(eventId, DateTimeOffset.UtcNow, source, bets);
    }

    /// <summary>Creates a minimal valid <see cref="EventResult"/> for the given event ID.</summary>
    public static EventResult MakeResult(EventId eventId)
    {
        return new EventResult(eventId, 2, 1, Side.Side1, DateTimeOffset.UtcNow);
    }

    /// <summary>
    /// Creates an <see cref="IOptionsMonitor{TOptions}"/> that always returns the given
    /// throttle. Use 1 for sequential test behaviour, higher values to exercise fan-out.
    /// </summary>
    public static IOptionsMonitor<ScrapingThrottle> Throttle(int maxConcurrentRequests = 1) =>
        new StaticOptionsMonitor<ScrapingThrottle>(new ScrapingThrottle
        {
            MaxConcurrentRequests = maxConcurrentRequests,
        });

    private sealed class StaticOptionsMonitor<T> : IOptionsMonitor<T> where T : class
    {
        private readonly T _value;
        public StaticOptionsMonitor(T value) => _value = value;
        public T CurrentValue => _value;
        public T Get(string? name) => _value;
        public IDisposable? OnChange(Action<T, string?> listener) => null;
    }
}