using AcDream.App.UI;
using AcDream.UI.Abstractions;

namespace AcDream.App.Tests.UI;

public class UiChannelMenuTests
{
    [Fact]
    public void Channels_HasExpected12Entries()
    {
        Assert.Equal(12, UiChannelMenu.Channels.Length);
    }

    [Fact]
    public void Channels_FirstEntry_IsSay()
    {
        Assert.Equal(ChatChannelKind.Say, UiChannelMenu.Channels[0].Channel);
        Assert.Equal("Say", UiChannelMenu.Channels[0].Label);
    }

    [Fact]
    public void Channels_LastEntry_IsOlthoi()
    {
        var last = UiChannelMenu.Channels[^1];
        Assert.Equal(ChatChannelKind.Olthoi, last.Channel);
        Assert.Equal("Olthoi", last.Label);
    }

    [Fact]
    public void Channels_ContainsAllExpectedKinds()
    {
        var kinds = new HashSet<ChatChannelKind>(UiChannelMenu.Channels.Select(c => c.Channel));
        Assert.Contains(ChatChannelKind.Say, kinds);
        Assert.Contains(ChatChannelKind.General, kinds);
        Assert.Contains(ChatChannelKind.Trade, kinds);
        Assert.Contains(ChatChannelKind.Lfg, kinds);
        Assert.Contains(ChatChannelKind.Fellowship, kinds);
        Assert.Contains(ChatChannelKind.Allegiance, kinds);
        Assert.Contains(ChatChannelKind.Patron, kinds);
        Assert.Contains(ChatChannelKind.Vassals, kinds);
        Assert.Contains(ChatChannelKind.Monarch, kinds);
        Assert.Contains(ChatChannelKind.Roleplay, kinds);
        Assert.Contains(ChatChannelKind.Society, kinds);
        Assert.Contains(ChatChannelKind.Olthoi, kinds);
    }

    [Fact]
    public void DefaultSelected_IsSay()
    {
        var menu = new UiChannelMenu();
        Assert.Equal(ChatChannelKind.Say, menu.Selected);
    }

    [Fact]
    public void OnChannelChanged_FiredWhenSelectionMadeViaEvent()
    {
        var menu = new UiChannelMenu { Width = 80f, Height = 18f };

        // Open the popup (click inside the button area — Data2 >= 0).
        var openEvt = new UiEvent(0, menu, UiEventType.MouseDown, 0, 10, 5);
        Assert.True(menu.OnEvent(openEvt));

        // Click on the second item (General) in the upward popup.
        // Popup renders UPWARD: top = -(12 * 16) = -192.
        // Item i=1 (General) occupies y in [-192 + 16, -192 + 32) = [-176, -160).
        // A click at ly = -176 + 8 = -168 hits item index = (int)((-168 + 192) / 16) = (int)(24/16) = 1.
        ChatChannelKind? fired = null;
        menu.OnChannelChanged = k => fired = k;

        var selectEvt = new UiEvent(0, menu, UiEventType.MouseDown, 0, 10, -168);
        Assert.True(menu.OnEvent(selectEvt));

        Assert.Equal(ChatChannelKind.General, fired);
        Assert.Equal(ChatChannelKind.General, menu.Selected);
    }
}