using AcDream.Core.Chat;
using AcDream.UI.Abstractions.Panels.Chat;

namespace AcDream.UI.Abstractions.Tests.Panels.Chat;

/// <summary>
/// Phase I.4: <see cref="ChatVM.LastIncomingTellSender"/> tracks the
/// sender of the most recent INCOMING Tell so the chat panel can route
/// <c>/r</c> replies. Outgoing self-sent Tell echoes (which run through
/// <see cref="ChatLog.OnSelfSent"/> with <c>SenderGuid = 0</c>) must not
/// pollute the field.
/// </summary>
public sealed class ChatVMLastTellSenderTests
{
    [Fact]
    public void LastIncomingTellSender_StartsNull()
    {
        var log = new ChatLog();
        var vm = new ChatVM(log);

        Assert.Null(vm.LastIncomingTellSender);
    }

    [Fact]
    public void LastIncomingTellSender_PopulatedFromOnTellReceived()
    {
        var log = new ChatLog();
        var vm = new ChatVM(log);

        log.OnTellReceived(sender: "Bestie", text: "ping", senderGuid: 0x5000_00AAu);

        Assert.Equal("Bestie", vm.LastIncomingTellSender);
    }

    [Fact]
    public void LastIncomingTellSender_UpdatedToMostRecentIncomingTell()
    {
        var log = new ChatLog();
        var vm = new ChatVM(log);

        log.OnTellReceived("Bestie", "ping", 0x5000_00AAu);
        log.OnTellReceived("Regal",  "yo",   0x5000_00BBu);

        Assert.Equal("Regal", vm.LastIncomingTellSender);
    }

    [Fact]
    public void LastIncomingTellSender_IgnoresSelfSentEcho()
    {
        var log = new ChatLog();
        var vm = new ChatVM(log);

        // /r reply echo: SenderGuid = 0 (no real GUID for ourselves).
        // Must NOT clobber the captured sender.
        log.OnTellReceived("Bestie", "ping", 0x5000_00AAu);
        log.OnSelfSent(ChatKind.Tell, "back at you", targetOrChannel: "Bestie");

        Assert.Equal("Bestie", vm.LastIncomingTellSender);
    }

    [Fact]
    public void LastIncomingTellSender_IgnoresLocalSpeech()
    {
        var log = new ChatLog();
        var vm = new ChatVM(log);

        log.OnLocalSpeech("Caith", "hello", 0x5000_00CCu, isRanged: false);

        Assert.Null(vm.LastIncomingTellSender);
    }

    [Fact]
    public void LastIncomingTellSender_IgnoresChannelBroadcast()
    {
        var log = new ChatLog();
        var vm = new ChatVM(log);

        log.OnChannelBroadcast(channelId: 7, sender: "Caith", text: "raid time");

        Assert.Null(vm.LastIncomingTellSender);
    }
}