using AcDream.App.UI;
using AcDream.App.UI.Layout;
using AcDream.Core.Net.Messages;
using AcDream.Core.Social;
using AcDream.Runtime;

namespace AcDream.App.Tests.UI.Layout;

/// <summary>
/// Controller-level tests for <see cref="SocialPanelController"/> against the
/// committed <c>social_panel_2100006E_1000018F.json</c> fixture (Campaign FA
/// slice FA3) — the SAME <c>LayoutImporter.ImportInfos(dats, 0x2100006Eu,
/// 0x1000018Fu)</c> catalog import <see cref="RetailUiRuntime.MountSocialPanel"/>
/// performs against real DATs. No DAT access, no live runtime — dat-free per
/// the established <see cref="FixtureLoader"/> pattern.
/// </summary>
public sealed class SocialPanelControllerTests
{
    private static SocialPanelController.Callbacks MakeCallbacks(
        List<string>? calls = null,
        RuntimeFellowshipSnapshot fellowship = default,
        RuntimeAllegianceSnapshot allegiance = default,
        FriendsState? friends = null,
        SquelchState? squelch = null)
    {
        calls ??= new List<string>();
        return new SocialPanelController.Callbacks(
            Toggle: () => calls.Add("toggle"),
            FellowshipSnapshot: () => fellowship,
            AllegianceSnapshot: () => allegiance,
            Friends: friends ?? new FriendsState(),
            Squelch: squelch ?? new SquelchState(),
            TemplateResolver: FakeRowTemplateResolver);
    }

    /// <summary>Mirrors the real Friends/Squelch row templates' own two-deep
    /// nested-text shape (FA3 live-mount probe) so
    /// <see cref="SocialPanelRowText.FindDeepest"/> has something realistic
    /// to resolve, without needing the templates' own (uncommitted, separate
    /// LayoutDesc) fixtures.</summary>
    private static UiElement? FakeRowTemplateResolver(uint layoutId, uint elementId)
    {
        var outer = new UiText();
        var inner = new UiText();
        outer.AddChild(inner);
        return outer;
    }

    // ── Mount conformance ────────────────────────────────────────────────────

    [Fact]
    public void Bind_RootBuildsAsUiTabPanel()
    {
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();

        Assert.IsType<UiTabPanel>(layout.Root);
    }

    /// <summary>
    /// Pins the authored <c>0x2E</c> tab table exactly as read from the live
    /// DATs (FA3 live-mount probe) — CORRECTING the coordinator addendum's
    /// x-order guess (see <see cref="SocialPanelController"/>'s own class
    /// doc). Four entries; Allegiance is the sole default.
    /// </summary>
    [Fact]
    public void TabTable_MatchesLiveDatPairing_AllegianceIsDefault()
    {
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();
        var tabs = Assert.IsType<UiTabPanel>(layout.Root);

        Assert.Equal(4, tabs.Tabs.Count);
        Assert.Contains(tabs.Tabs, e =>
            e.ButtonElementId == 0x1000028Cu && e.PageElementId == 0x10000291u && e.IsDefault);
        Assert.Contains(tabs.Tabs, e =>
            e.ButtonElementId == 0x1000028Eu && e.PageElementId == 0x10000292u && !e.IsDefault);
        Assert.Contains(tabs.Tabs, e =>
            e.ButtonElementId == 0x10000512u && e.PageElementId == 0x10000513u && !e.IsDefault);
        Assert.Contains(tabs.Tabs, e =>
            e.ButtonElementId == 0x1000053Bu && e.PageElementId == 0x1000054Au && !e.IsDefault);
        Assert.Single(tabs.Tabs, e => e.IsDefault);
    }

    [Fact]
    public void Bind_Succeeds_AndActivateTabs_SelectsTheAuthoredDefault()
    {
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();

        SocialPanelController? controller = SocialPanelController.Bind(layout, MakeCallbacks());

        Assert.NotNull(controller);
        controller!.ActivateTabs();
        Assert.Empty(controller.TabPanel.UnresolvedEntries);
        Assert.True(controller.IsShowingAllegiance);
        Assert.False(controller.IsShowingFellowship);
    }

    [Fact]
    public void ShowFellowship_SwitchesTheActiveTab()
    {
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();
        SocialPanelController? controller = SocialPanelController.Bind(layout, MakeCallbacks());
        Assert.NotNull(controller);
        controller!.ActivateTabs();

        controller.ShowFellowship();

        Assert.True(controller.IsShowingFellowship);
        Assert.False(controller.IsShowingAllegiance);
    }

    [Fact]
    public void CloseButton_InvokesToggleCallback()
    {
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();
        var calls = new List<string>();
        SocialPanelController? controller = SocialPanelController.Bind(layout, MakeCallbacks(calls));
        Assert.NotNull(controller);

        var close = Assert.IsType<UiButton>(layout.FindElement(0x10000290u));
        close.OnEvent(new UiEvent(0, close, UiEventType.Click));

        Assert.Contains("toggle", calls);
    }

    // ── Fellowship empty state (item 4) ─────────────────────────────────────

    [Fact]
    public void Fellowship_NoFellowship_ShowsNotInFellowshipFrame()
    {
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();
        SocialPanelController? controller = SocialPanelController.Bind(
            layout,
            MakeCallbacks(fellowship: new RuntimeFellowshipSnapshot { IsInFellowship = false }));
        Assert.NotNull(controller);

        UiElement notIn = UiElement.FindDescendant(controller!.TabPanel, 0x1000026Bu)!;
        UiElement inFellowship = UiElement.FindDescendant(controller.TabPanel, 0x10000275u)!;
        Assert.True(notIn.Visible);
        Assert.False(inFellowship.Visible);
    }

    [Fact]
    public void Fellowship_HasFellowship_ShowsInFellowshipFrame()
    {
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();
        SocialPanelController? controller = SocialPanelController.Bind(
            layout,
            MakeCallbacks(fellowship: new RuntimeFellowshipSnapshot { IsInFellowship = true }));
        Assert.NotNull(controller);

        UiElement notIn = UiElement.FindDescendant(controller!.TabPanel, 0x1000026Bu)!;
        UiElement inFellowship = UiElement.FindDescendant(controller.TabPanel, 0x10000275u)!;
        Assert.False(notIn.Visible);
        Assert.True(inFellowship.Visible);
    }

    // ── Allegiance empty state (item 4) ─────────────────────────────────────

    [Fact]
    public void Allegiance_NoProfile_HidesBlocksAndBlanksNames()
    {
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();
        SocialPanelController? controller = SocialPanelController.Bind(
            layout,
            MakeCallbacks(allegiance: new RuntimeAllegianceSnapshot { HasProfile = false }));
        Assert.NotNull(controller);

        UiElement monarchField = UiElement.FindDescendant(controller!.TabPanel, 0x10000255u)!;
        UiElement patronField = UiElement.FindDescendant(controller.TabPanel, 0x1000025Au)!;
        Assert.False(monarchField.Visible);
        Assert.False(patronField.Visible);

        var monarchName = Assert.IsType<UiText>(
            UiElement.FindDescendant(monarchField, 0x10000257u));
        var patronName = Assert.IsType<UiText>(
            UiElement.FindDescendant(patronField, 0x1000025Cu));
        Assert.Equal(" ", Assert.Single(monarchName.LinesProvider()).Text);
        Assert.Equal(" ", Assert.Single(patronName.LinesProvider()).Text);
    }

    [Fact]
    public void Allegiance_HasProfile_ShowsBothBlocks()
    {
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();
        SocialPanelController? controller = SocialPanelController.Bind(
            layout,
            MakeCallbacks(allegiance: new RuntimeAllegianceSnapshot { HasProfile = true }));
        Assert.NotNull(controller);

        UiElement monarchField = UiElement.FindDescendant(controller!.TabPanel, 0x10000255u)!;
        UiElement patronField = UiElement.FindDescendant(controller.TabPanel, 0x1000025Au)!;
        Assert.True(monarchField.Visible);
        Assert.True(patronField.Visible);
    }

    // ── Friends/Squelch read-only lists (item 5) ────────────────────────────

    [Fact]
    public void Friends_PopulatesOneRowPerEntry()
    {
        var friends = new FriendsState();
        friends.Apply(new FriendsUpdate(
            FriendsUpdateType.Full,
            new List<FriendEntry>
            {
                new(1u, "Alice", true, false, System.Array.Empty<uint>(), System.Array.Empty<uint>()),
                new(2u, "Bob", false, false, System.Array.Empty<uint>(), System.Array.Empty<uint>()),
            }));
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();

        SocialPanelController? controller = SocialPanelController.Bind(
            layout, MakeCallbacks(friends: friends));
        Assert.NotNull(controller);

        var listBox = Assert.IsType<UiTemplateListBox>(
            UiElement.FindDescendant(controller!.TabPanel, 0x10000513u) is { } friendsPage
                ? UiElement.FindDescendant(friendsPage, 0x10000517u)
                : null);
        Assert.Equal(2, listBox.ViewportForTest!.Children.Count);
    }

    [Fact]
    public void Friends_ReactsToRevisionChange_OnTick()
    {
        var friends = new FriendsState();
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();
        SocialPanelController? controller = SocialPanelController.Bind(
            layout, MakeCallbacks(friends: friends));
        Assert.NotNull(controller);

        UiElement friendsPage = UiElement.FindDescendant(controller!.TabPanel, 0x10000513u)!;
        var listBox = Assert.IsType<UiTemplateListBox>(
            UiElement.FindDescendant(friendsPage, 0x10000517u));
        Assert.Equal(0, listBox.ViewportForTest?.Children.Count ?? 0);

        friends.Apply(new FriendsUpdate(
            FriendsUpdateType.Add,
            new List<FriendEntry>
            {
                new(1u, "Alice", true, false, System.Array.Empty<uint>(), System.Array.Empty<uint>()),
            }));
        controller.Tick();

        Assert.Single(listBox.ViewportForTest!.Children);
    }

    [Fact]
    public void Squelch_PopulatesCharacterAndAccountRows()
    {
        var squelch = new SquelchState();
        squelch.Replace(new SquelchDatabase(
            new Dictionary<string, uint>(System.StringComparer.OrdinalIgnoreCase) { ["BadAccount"] = 1u },
            new Dictionary<uint, SquelchInfo>
            {
                [7u] = new SquelchInfo("Grief", false, new HashSet<uint>()),
            },
            new SquelchInfo(string.Empty, false, new HashSet<uint>())));
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();

        SocialPanelController? controller = SocialPanelController.Bind(
            layout, MakeCallbacks(squelch: squelch));
        Assert.NotNull(controller);

        UiElement squelchPage = UiElement.FindDescendant(controller!.TabPanel, 0x1000054Au)!;
        var listBox = Assert.IsType<UiTemplateListBox>(
            UiElement.FindDescendant(squelchPage, 0x1000053Eu));
        Assert.Equal(2, listBox.ViewportForTest!.Children.Count);
    }

    // ── D1: Friends/Squelch action buttons are honest INERT ────────────────

    [Fact]
    public void FriendsAndSquelchActionButtons_AreClickable_ButHaveNoHandler()
    {
        ImportedLayout layout = FixtureLoader.LoadSocialPanelHost();
        SocialPanelController? controller = SocialPanelController.Bind(layout, MakeCallbacks());
        Assert.NotNull(controller);

        foreach (uint buttonId in new[] { 0x10000514u, 0x10000515u, 0x10000516u })
        {
            var button = Assert.IsType<UiButton>(
                UiElement.FindDescendant(controller!.TabPanel, buttonId));
            Assert.Null(button.OnClick);
        }
        foreach (uint buttonId in new[] { 0x10000547u, 0x1000054Bu, 0x1000054Cu })
        {
            var button = Assert.IsType<UiButton>(
                UiElement.FindDescendant(controller!.TabPanel, buttonId));
            Assert.Null(button.OnClick);
        }
    }
}