using NSubstitute;
using TeleWave.Application.Common.Interfaces;
using TeleWave.Application.Notifications;
using TeleWave.Application.Tests.Support;
using TeleWave.Domain.Broadcast;
using TeleWave.Domain.Library;
using TeleWave.Domain.Media;
using TeleWave.Domain.Notifications;
using Xunit;

namespace TeleWave.Application.Tests.Notifications;

/// <summary>
/// Рассылка по ленте. Проверяется то, из-за чего бот становится спамом: оповещение шлётся
/// на смену шоу, а не на каждую серию, и только тем, кто подписан на этот канал.
/// </summary>
public class TelegramNotifierTests
{
    private static readonly DateTimeOffset Now = new(2026, 8, 1, 20, 0, 0, TimeSpan.Zero);

    private static TelegramSettings Settings()
    {
        var settings = TelegramSettings.CreateDefault();
        settings.Update(
            new TelegramSettingsUpdate(
                true,
                TelegramTransport.Polling,
                "123:ABC",
                null,
                TelegramProxyKind.None,
                null,
                null,
                null,
                null
            )
        );
        return settings;
    }

    private static ScheduleEntry Program(
        Guid channelId,
        Guid showId,
        DateTimeOffset start,
        int minutes
    ) =>
        ScheduleEntry.FromSlot(
            channelId,
            Guid.NewGuid(),
            ScheduleEntryKind.Program,
            start,
            start.AddMinutes(minutes),
            new ScheduleEntryOrigin(showId, 0, null, null, null)
        );

    [Fact]
    public async Task Notifies_OnlySubscribersOfTheChannel_AndOnlyOnShowChange()
    {
        var fixture = new TestDb();
        var channel = Channel.Create("Мультреалити", "mult", Now);
        var other = Channel.Create("Второй", "second", Now);
        var show = Show.Create("Футурама", ShowKind.Series);
        var another = Show.Create("Симпсоны", ShowKind.Series);

        var subscriber = TelegramSubscriber.Create(100, Guid.NewGuid(), "viewer", Now);
        subscriber.Toggle(channel.Id, TelegramNotificationKind.ShowStart);
        var stranger = TelegramSubscriber.Create(200, Guid.NewGuid(), "other", Now);
        stranger.Toggle(other.Id, TelegramNotificationKind.ShowStart);

        await using (var seed = fixture.New())
        {
            seed.Channels.AddRange(channel, other);
            seed.Shows.AddRange(show, another);
            seed.TelegramSubscribers.AddRange(subscriber, stranger);
            // Предыдущая программа того же шоу: следующая серия сменой не считается.
            seed.ScheduleEntries.Add(Program(channel.Id, show.Id, Now.AddMinutes(-30), 25));
            seed.ScheduleEntries.Add(Program(channel.Id, show.Id, Now.AddMinutes(-2), 25));
            await seed.SaveChangesAsync(CancellationToken.None);
        }

        var api = Substitute.For<ITelegramApi>();
        var settings = Settings();
        settings.MarkNotifiedUntil(Now.AddMinutes(-5));

        await using var db = fixture.New();
        var sent = await new TelegramNotifier(db, api).RunAsync(
            settings,
            Now,
            CancellationToken.None
        );

        Assert.Equal(0, sent);
        await api.DidNotReceive()
            .SendMessageAsync(
                Arg.Any<TelegramSettings>(),
                Arg.Any<long>(),
                Arg.Any<string>(),
                Arg.Any<IReadOnlyList<IReadOnlyList<TelegramButton>>?>(),
                Arg.Any<CancellationToken>()
            );
    }

    [Fact]
    public async Task Notifies_WhenShowChanges()
    {
        var fixture = new TestDb();
        var channel = Channel.Create("Мультреалити", "mult", Now);
        var previous = Show.Create("Симпсоны", ShowKind.Series);
        var started = Show.Create("Футурама", ShowKind.Series);

        var subscriber = TelegramSubscriber.Create(100, Guid.NewGuid(), "viewer", Now);
        subscriber.Toggle(channel.Id, TelegramNotificationKind.ShowStart);

        await using (var seed = fixture.New())
        {
            seed.Channels.Add(channel);
            seed.Shows.AddRange(previous, started);
            seed.TelegramSubscribers.Add(subscriber);
            seed.ScheduleEntries.Add(Program(channel.Id, previous.Id, Now.AddMinutes(-30), 25));
            seed.ScheduleEntries.Add(Program(channel.Id, started.Id, Now.AddMinutes(-1), 25));
            await seed.SaveChangesAsync(CancellationToken.None);
        }

        var api = Substitute.For<ITelegramApi>();
        var settings = Settings();
        settings.MarkNotifiedUntil(Now.AddMinutes(-5));

        await using var db = fixture.New();
        var sent = await new TelegramNotifier(db, api).RunAsync(
            settings,
            Now,
            CancellationToken.None
        );

        Assert.Equal(1, sent);
        await api.Received(1)
            .SendMessageAsync(
                Arg.Any<TelegramSettings>(),
                100,
                Arg.Is<string>(s => s.Contains("Футурама")),
                null,
                Arg.Any<CancellationToken>()
            );

        // Граница разобранного двигается всегда — иначе следующий тик оповестил бы о том же.
        Assert.Equal(Now, settings.NotifiedUntil);
    }
}