namespace IRCSharp.Tests.State;

public class Channel
{
    private readonly Server _server = new("test");

    public Channel()
    {
        _server.Parse(new Line("001 nickname"));
        _server.Parse(new Line(":nickname JOIN #chan"));
    }

    [Test]
    public async Task JoinSelf()
    {
        await Assert.That(_server.Channels).ContainsKey("#chan");
        await Assert.That(_server.Users).ContainsKey("nickname");
        await Assert.That(_server.Channels).HasCount(1);
        await Assert.That(_server.Users).HasCount(1);

        var user = _server.Users["nickname"];
        var chan = _server.Channels["#chan"];
        await Assert.That(chan.Users).ContainsKey(user.NickNameLower).And.HasCount(1);
        await Assert.That(user.Channels).Contains(chan.NameLower).And.HasCount(1);
    }

    [Test]
    public async Task JoinOther()
    {
        _server.Parse(new Line(":other JOIN #chan"));

        await Assert.That(_server.Users).HasCount(2);
        await Assert.That(_server.Users).ContainsKey("other");

        var channel = _server.Channels["#chan"];
        await Assert.That(channel.Users).HasCount(2);

        var user = _server.Users["other"];
        await Assert.That(user.Channels).Contains(channel.NameLower).And.HasCount(1);
    }

    [Test]
    public async Task PartSelf()
    {
        _server.Parse(new Line(":nickname PART #chan"));

        await Assert.That(_server.Users).IsEmpty();
        await Assert.That(_server.Channels).IsEmpty();
    }

    [Test]
    public async Task PartOther()
    {
        _server.Parse(new Line(":other JOIN #chan"));
        _server.Parse(new Line(":other PART #chan"));

        var user     = _server.Users["nickname"];
        var channel  = _server.Channels["#chan"];
        var chanUser = channel.Users[user.NickNameLower];

        await Assert.That(user.Channels).Contains(channel.NameLower).And.HasCount(1);
        await Assert.That(_server.Users).IsEquivalentTo(new Dictionary<string, IRCStates.User> {{"nickname", user}});
        await Assert.That(_server.Channels).IsEquivalentTo(new Dictionary<string, IRCStates.Channel> {{"#chan", channel}});
        await Assert.That(channel.Users).IsEquivalentTo(new Dictionary<string, ChannelUser> {{"nickname", chanUser}});
    }

    [Test]
    public async Task KickSelf()
    {
        _server.Parse(new Line(":nickname KICK #chan nickname"));

        await Assert.That(_server.Users).IsEmpty();
        await Assert.That(_server.Channels).IsEmpty();
    }

    [Test]
    public async Task KickOther()
    {
        _server.Parse(new Line(":other JOIN #chan"));
        _server.Parse(new Line(":nickname KICK #chan other"));

        var user     = _server.Users["nickname"];
        var channel  = _server.Channels["#chan"];
        var chanUser = channel.Users[user.NickNameLower];

        await Assert.That(_server.Users).HasCount(1);
        await Assert.That(_server.Channels).HasCount(1);
        await Assert.That(user.Channels).Contains(channel.NameLower).And.HasCount(1);
        await Assert.That(channel.Users)
            .IsEquivalentTo(new Dictionary<string, ChannelUser> { { user.NickNameLower, chanUser } });
    }

    [Test]
    public async Task QuitSelf()
    {
        _server.Parse(new Line("QUIT :i'm outta here"));
        await Assert.That(_server.Users).IsEmpty();
        await Assert.That(_server.Channels).IsEmpty();
    }

    [Test]
    public async Task QuitSelfWithSource()
    {
        _server.Parse(new Line(":nickname QUIT :i'm outta here"));
        await Assert.That(_server.Users).IsEmpty();
        await Assert.That(_server.Channels).IsEmpty();
    }

    [Test]
    public async Task QuitOther()
    {
        _server.Parse(new Line(":other JOIN #chan"));
        _server.Parse(new Line(":other QUIT :see ya"));
        await Assert.That(_server.Users).DoesNotContainKey("other");
    }

    [Test]
    public async Task TopicText()
    {
        _server.Parse(new Line("332 * #chan :test"));
        await Assert.That(_server.Channels["#chan"].Topic).IsEqualTo("test");
    }

    [Test]
    public async Task TopicSetByAt()
    {
        var dt = DateTimeOffset.FromUnixTimeSeconds(1584023277).DateTime;
        _server.Parse(new Line("333 * #chan other 1584023277"));

        var channel = _server.Channels["#chan"];

        await Assert.That(channel.TopicSetter).IsEqualTo("other");
        await Assert.That(channel.TopicTime).IsEqualTo(dt);
    }

    [Test]
    public async Task TopicCommand()
    {
        _server.Parse(new Line("TOPIC #chan :hello there"));
        await Assert.That(_server.Channels["#chan"].Topic).IsEqualTo("hello there");
    }

    [Test]
    public async Task CreationDate()
    {
        var dt = DateTimeOffset.FromUnixTimeSeconds(1584041889).DateTime;
        _server.Parse(new Line("329 * #chan 1584041889"));
        await Assert.That(_server.Channels["#chan"].Created).IsEqualTo(dt);
    }

    [Test]
    public async Task NamesCommand()
    {
        _server.Parse(new Line("353 * * #chan :nickname @+other"));
        await Assert.That(_server.Users).ContainsKey("nickname");
        await Assert.That(_server.Users).ContainsKey("other");

        var user      = _server.Users["other"];
        var channel   = _server.Channels["#chan"];
        var chanUser1 = channel.Users[user.NickNameLower];
        var chanUser2 = channel.Users[_server.NickNameLower];

        await Assert.That(channel.Users).HasCount(2);
        await Assert.That(channel.Users[user.NickNameLower].Modes).IsEqualTo(chanUser1.Modes);
        await Assert.That(channel.Users[_server.NickNameLower].Modes).IsEqualTo(chanUser2.Modes);
        await Assert.That(chanUser1.Modes).IsEquivalentTo(["o", "v"]);
        await Assert.That(user.Channels).Contains(channel.NameLower).And.HasCount(1);
    }

    [Test]
    public async Task UserhostInNames()
    {
        _server.Parse(new Line("353 * * #chan :nickname!user@host other!user2@host2"));
        await Assert.That(_server.UserName).IsEqualTo("user");
        await Assert.That(_server.HostName).IsEqualTo("host");

        var user = _server.Users["other"];
        await Assert.That(user.UserName).IsEqualTo("user2");
        await Assert.That(user.HostName).IsEqualTo("host2");
    }

    [Test]
    public async Task NickAfterJoin()
    {
        var user     = _server.Users["nickname"];
        var channel  = _server.Channels["#chan"];
        var chanUser = channel.Users[user.NickNameLower];
        _server.Parse(new Line(":nickname NICK nickname2"));
        await Assert.That(channel.Users)
            .IsEquivalentTo(new Dictionary<string, ChannelUser> { { user.NickNameLower, chanUser } });
    }
}