using System.Linq;
using AcDream.App.UI;
using AcDream.App.UI.Layout;
using AcDream.Core.Net.Messages;
using AcDream.Core.World;

namespace AcDream.App.Tests.UI.Layout;

/// <summary>
/// Controller-level tests for <see cref="MapHousePanelController"/> against
/// the committed <c>map_house_2100006E_1000018C.json</c> fixture (Batch C,
/// overnight hover/UI round) — the SAME <c>LayoutImporter.ImportInfos(dats,
/// 0x2100006Eu, 0x1000018Cu)</c> catalog import
/// <see cref="RetailUiRuntime.MountMapHousePanel"/> performs against real
/// DATs. No DAT access, no live runtime — dat-free per the established
/// <see cref="FixtureLoader"/> pattern.
/// </summary>
public sealed class MapHousePanelControllerTests
{
    /// <summary>Serves the town-hotspot template. Returns a
    /// <see cref="UiButton"/> — matching the live template's own authored
    /// Type 1 (<c>MapHousePanelSlotProbeTests</c>: "hotspot template
    /// type=1") — so <see cref="MapPageController.BuildTownMarkers"/>'s
    /// <c>marker is UiButton</c> tooltip-text branch is actually exercised
    /// by these tests. A real <see cref="RowTemplateResolver"/> would set
    /// <c>DatElementId</c> the same way <see cref="LayoutImporter.Build"/>
    /// does, so tests that need to find these markers back by id after the
    /// fact need it too.</summary>
    private static UiElement? FakeHotspotTemplate(uint layoutId, uint elementId)
        => new UiButton(new ElementInfo(), static _ => (0u, 0, 0))
        {
            Width = 10f,
            Height = 10f,
            DatElementId = elementId,
        };

    /// <summary>The <see cref="MapPageController.Bindings.IconBuilder"/>
    /// seam: builds m_pMap's two button-swallowed icon children from their
    /// OWN <see cref="ElementInfo"/>s inside the panel-slot resolve tree
    /// (register row AD-108 — a standalone re-import cannot find them on
    /// the live DAT, so the icons are found under the already-resolved
    /// <c>pageInfo</c> and built through this seam instead). Mirrors
    /// production's <c>LayoutImporter.Build(info, ...).Root</c>, which sets
    /// <c>DatElementId</c> from the info's own id.</summary>
    private static UiElement? FakeIconBuilder(ElementInfo info)
        => new UiButton(new ElementInfo(), static _ => (0u, 0, 0))
        {
            Width = 10f,
            Height = 10f,
            DatElementId = info.Id,
        };

    /// <summary>The House ListBox's own row template resolves to a
    /// <see cref="UiText"/> in the live DAT (<c>MapHousePanelSlotProbeTests</c>:
    /// "row template type=12" — <c>UIElement_Text</c>), unlike the Map tab's
    /// UiButton hotspots above — a fresh instance per call, matching
    /// production's real resolver.</summary>
    private static UiElement? FakeHouseRowTemplate(uint layoutId, uint elementId)
        => new UiText { Width = 280f, Height = 28f };

    private static MapHousePanelController.Callbacks MakeCallbacks(
        List<string>? calls = null,
        Func<DerethDateTime.Calendar>? currentCalendar = null,
        Func<uint>? playerCellId = null,
        Func<CreateObject.ServerPosition?>? housePosition = null,
        Func<IReadOnlyList<string>>? houseLines = null)
    {
        calls ??= new List<string>();
        return new MapHousePanelController.Callbacks(
            Toggle: () => calls.Add("toggle"),
            Map: new MapPageController.Bindings(
                CurrentCalendar: currentCalendar ?? (static () => default),
                PlayerCellId: playerCellId ?? (static () => 0u),
                HousePosition: housePosition ?? (static () => null),
                TemplateResolver: FakeHotspotTemplate,
                IconBuilder: FakeIconBuilder),
            House: new HousePageController.Bindings(
                Lines: houseLines ?? (static () => Array.Empty<string>()),
                OnShown: () => calls.Add("house-shown"),
                TemplateResolver: FakeHouseRowTemplate));
    }

    [Fact]
    public void Bind_RootBuildsAsUiTabPanel()
    {
        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();

        MapHousePanelController? controller =
            MapHousePanelController.Bind(rootInfo, layout, MakeCallbacks());

        Assert.NotNull(controller);
        Assert.IsType<UiTabPanel>(controller!.Root);
    }

    /// <summary>Pins the authored tab table exactly as read from the live
    /// DATs (<c>MapHousePanelSlotProbeTests</c>): two entries, Map is the
    /// sole default.</summary>
    [Fact]
    public void TabTable_MatchesLiveDatPairing_MapIsDefault()
    {
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        var tabs = Assert.IsType<UiTabPanel>(layout.Root);

        Assert.Equal(2, tabs.Tabs.Count);
        Assert.Contains(tabs.Tabs, e =>
            e.ButtonElementId == 0x100001F3u && e.PageElementId == 0x100001F6u && e.IsDefault);
        Assert.Contains(tabs.Tabs, e =>
            e.ButtonElementId == 0x100001F4u && e.PageElementId == 0x100001F7u && !e.IsDefault);
        Assert.Single(tabs.Tabs, e => e.IsDefault);
    }

    [Fact]
    public void Bind_Succeeds_AndActivateTabs_SelectsMapByDefault()
    {
        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        MapHousePanelController? controller =
            MapHousePanelController.Bind(rootInfo, layout, MakeCallbacks());

        Assert.NotNull(controller);
        controller!.ActivateTabs();

        Assert.Empty(controller.TabPanel.UnresolvedEntries);
        Assert.False(controller.IsShowingHouse);
    }

    [Fact]
    public void SwitchToHouse_FiresOnShown_OnlyWhenPanelIsVisible()
    {
        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        var calls = new List<string>();
        MapHousePanelController? controller =
            MapHousePanelController.Bind(rootInfo, layout, MakeCallbacks(calls));
        Assert.NotNull(controller);
        controller!.ActivateTabs();

        // Not visible yet: switching tabs must not fire OnShown.
        controller.TabPanel.SwitchTo(0x100001F7u);
        Assert.DoesNotContain("house-shown", calls);

        controller.OnShown();
        Assert.Contains("house-shown", calls);
    }

    [Fact]
    public void CloseButton_InvokesToggle()
    {
        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        var calls = new List<string>();
        MapHousePanelController? controller =
            MapHousePanelController.Bind(rootInfo, layout, MakeCallbacks(calls));
        Assert.NotNull(controller);

        UiElement? close = layout.FindElement(0x100001F5u);
        Assert.IsType<UiButton>(close);
        ((UiButton)close!).OnClick?.Invoke();

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

    [Fact]
    public void Bind_BuildsAll53TownHotspots_UnderTheMapWidget()
    {
        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        MapHousePanelController? controller =
            MapHousePanelController.Bind(rootInfo, layout, MakeCallbacks());
        Assert.NotNull(controller);

        UiElement? map = UiElement.FindDescendant(controller!.Root, MapPageController.MapWidgetId);
        Assert.NotNull(map);
        // m_pMap's own children are the player/house icons (found under the
        // panel-slot resolve tree and rebuilt via Bindings.IconBuilder — see
        // MapPageController.Bind's doc on why m_pMap being a Button swallows
        // its authored nested children) PLUS the 53 town hotspots.
        var townMarkers = map!.Children
            .Where(c => c.DatElementId != MapPageController.PlayerIconId
                && c.DatElementId != MapPageController.HouseIconId)
            .ToList();
        Assert.Equal(55, map.Children.Count);
        Assert.Equal(53, townMarkers.Count);
        Assert.All(townMarkers, c => Assert.Contains(
            MapLocations.All, loc => loc.Width == c.Width && loc.Height == c.Height));
        // Runtime tooltip text (UiButton.TooltipText, backing
        // GetTooltipText()) — the retail SetTooltip/m_TTText mechanism, NOT
        // the DAT-authored AuthoredTooltipText path. The popup-skin locator
        // is unconditionally required even on the runtime-text path (see
        // RetailTooltipPresenter.SharedPopupSkinRootElementId's doc).
        Assert.All(townMarkers, c => Assert.NotEqual(0u, c.AuthoredTooltipRootElementId));
        Assert.All(townMarkers, c => Assert.NotEqual(0u, c.AuthoredTooltipLayoutDid));
        Assert.All(townMarkers, c => Assert.IsType<UiButton>(c));
        Assert.All(townMarkers, c => Assert.False(string.IsNullOrEmpty(((UiButton)c).TooltipText)));
        Assert.Contains(townMarkers, c => ((UiButton)c).TooltipText == "Holtburg");
    }

    [Fact]
    public void Bind_HouseListBoxStartsEmpty_MatchingRetailPostInit()
    {
        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        MapHousePanelController? controller =
            MapHousePanelController.Bind(rootInfo, layout, MakeCallbacks());
        Assert.NotNull(controller);

        UiElement? box = UiElement.FindDescendant(controller!.Root, HousePageController.TextBoxId);
        var listBox = Assert.IsType<UiTemplateListBox>(box);
        Assert.Equal(0, listBox.ContentHeight);
    }

    /// <summary>
    /// Batch C House-ownership-text closer (2026-08-17): the ONE
    /// decomp-verified <c>gmHouseUI::DisplayPurchaseTimeText @0x004a3110</c>
    /// line a houseless character's HouseQuery response renders — proves
    /// <see cref="HousePageController"/>'s revision-gated
    /// <see cref="MapHousePanelController.Tick"/> poll actually rebuilds the
    /// authored row template with real text end-to-end, the same way
    /// <see cref="RuntimeHouseStateTests"/> proves the text composition in
    /// isolation.
    /// </summary>
    [Fact]
    public void Tick_RendersHouseLinesIntoTheAuthoredRowTemplate()
    {
        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        string[] lines = ["You may buy another house immediately."];
        MapHousePanelController? controller = MapHousePanelController.Bind(
            rootInfo, layout, MakeCallbacks(houseLines: () => lines));
        Assert.NotNull(controller);

        controller!.Tick(0.016);

        UiElement? box = UiElement.FindDescendant(controller.Root, HousePageController.TextBoxId);
        var listBox = Assert.IsType<UiTemplateListBox>(box);
        // Rows land in the ListBox's internal scrollable viewport (AddChild
        // there, not directly on the ListBox itself — UiTemplateListBox's
        // own #372/#412 dormancy machinery), exposed to tests via
        // ViewportForTest.
        UiScrollablePanel viewport = Assert.IsType<UiScrollablePanel>(
            listBox.ViewportForTest);
        Assert.Single(viewport.Children);
        var row = Assert.IsType<UiText>(viewport.Children[0]);
        Assert.Equal(
            "You may buy another house immediately.",
            Assert.Single(row.LinesProvider()).Text);
    }
}