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>The live hotspot template's own authored popup locator
    /// (<c>MapHousePanelSlotProbeTests</c>, 2026-08-17 morning gate
    /// finding 3: DirectState <c>P0x47=0x10000398</c>/<c>P0x48=0x21000041</c>
    /// — the map-note skin whose text child fonts <c>0x40000015</c>).</summary>
    private const uint MapNoteSkinRootId = 0x10000398u;
    private const uint MapNoteSkinLayoutId = 0x21000041u;

    /// <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. Carries the template's own authored tooltip
    /// locator (which production <see cref="LayoutImporter"/> populates
    /// from the property bag) — finding 3 removed the shared-skin override
    /// that used to clobber it, so the fixture must author it the way the
    /// live DAT does.</summary>
    private static UiElement? FakeHotspotTemplate(uint layoutId, uint elementId)
        => new UiButton(MapNoteTemplateInfo(), static _ => (0u, 0, 0))
        {
            Width = 10f,
            Height = 10f,
            DatElementId = elementId,
            AuthoredTooltipRootElementId = MapNoteSkinRootId,
            AuthoredTooltipLayoutDid = MapNoteSkinLayoutId,
            AuthoredTooltipDelaySeconds = 0f,   // authored P0x50 = 0.0
            AuthoredTooltipEnabled = true,      // authored P0x4B
        };

    /// <summary>The template's authored state shape (raw-DAT-dumped):
    /// media-less <c>Normal</c>/<c>Normal_rollover</c> descriptors, both
    /// <c>PassToChildren=true</c>, plus <c>P0x13</c> RolloverEnabled.</summary>
    private static ElementInfo MapNoteTemplateInfo()
    {
        var info = new ElementInfo { Type = 1, Width = 10, Height = 10 };
        var direct = new UiStateInfo { Id = UiStateInfo.DirectStateId };
        direct.Properties.Values[0x13u] = new UiPropertyValue
        { Kind = UiPropertyKind.Bool, BoolValue = true };
        info.States[UiStateInfo.DirectStateId] = direct;
        info.States[1u] = new UiStateInfo { Id = 1u, Name = "Normal", PassToChildren = true };
        info.States[2u] = new UiStateInfo { Id = 2u, Name = "Normal_rollover", PassToChildren = true };
        return info;
    }

    /// <summary>The template's highlight child info (live: <c>0x100001F1</c>,
    /// base <c>0x100002B7</c>@<c>0x21000042</c> — the green frame), with the
    /// authored per-state <c>P0x3B</c> flip.</summary>
    private static ElementInfo HighlightChildInfo()
    {
        var info = new ElementInfo { Id = 0x100001F1u, Type = 3, Width = 10, Height = 10 };
        var normal = new UiStateInfo { Id = 1u, Name = "Normal" };
        normal.Properties.Values[0x3Bu] = new UiPropertyValue
        { Kind = UiPropertyKind.Bool, BoolValue = true };
        var rollover = new UiStateInfo { Id = 2u, Name = "Normal_rollover" };
        rollover.Properties.Values[0x3Bu] = new UiPropertyValue
        { Kind = UiPropertyKind.Bool, BoolValue = false };
        info.States[1u] = normal;
        info.States[2u] = rollover;
        return info;
    }

    /// <summary>Template-info resolver standing in for
    /// <c>RowTemplateResolver.ResolveInfo</c>: the template with its
    /// button-swallowed highlight child attached.</summary>
    private static ElementInfo? FakeHotspotTemplateInfo(uint layoutId, uint elementId)
    {
        ElementInfo info = MapNoteTemplateInfo();
        info.Children.Add(HighlightChildInfo());
        return info;
    }

    /// <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 — and, like production's
    /// type-driven factory, builds a Type-3 info as a stateful
    /// <see cref="UiDatElement"/> FROM that info (the town markers'
    /// rollover-highlight child, morning gate finding 3, rides this same
    /// seam and needs its per-state property bags carried through).</summary>
    private static UiElement? FakeIconBuilder(ElementInfo info)
        => info.Type == 3
            ? new UiDatElement(info, static _ => (0u, 0, 0))
            {
                Width = 10f,
                Height = 10f,
                DatElementId = info.Id,
            }
            : 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,
        Func<uint, uint, ElementInfo?>? templateInfoResolver = 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,
                TemplateInfoResolver: templateInfoResolver),
            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
        // + zero delay are the TEMPLATE's OWN authored values (2026-08-17
        // morning gate finding 3: P0x47=0x10000398/P0x48=0x21000041/
        // P0x50=0.0), which BuildTownMarkers must NOT clobber — the pre-fix
        // code overwrote them with the shared generic skin, losing the
        // map-note skin's 0x40000015 font.
        Assert.All(townMarkers, c => Assert.Equal(MapNoteSkinRootId, c.AuthoredTooltipRootElementId));
        Assert.All(townMarkers, c => Assert.Equal(MapNoteSkinLayoutId, c.AuthoredTooltipLayoutDid));
        Assert.All(townMarkers, c => Assert.Equal(0f, c.AuthoredTooltipDelaySeconds));
        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");
    }

    /// <summary>
    /// 2026-08-17 morning gate finding 3, the hover-highlight half: each
    /// marker rebuilds the template's button-swallowed highlight child
    /// through the IconBuilder seam and arms it via the initial Normal
    /// cascade (hidden at rest, per-state <c>P0x3B</c>); hovering the marker
    /// swaps it to <c>Normal_rollover</c> (shown — the green
    /// <c>0x06004CC9</c> frame in the live DAT).
    /// </summary>
    [Fact]
    public void TownMarkers_RolloverHighlight_StartsHidden_ShowsOnHover()
    {
        ElementInfo rootInfo = FixtureLoader.LoadMapHouseHostInfos();
        ImportedLayout layout = FixtureLoader.LoadMapHouseHost();
        MapHousePanelController? controller = MapHousePanelController.Bind(
            rootInfo, layout, MakeCallbacks(templateInfoResolver: FakeHotspotTemplateInfo));
        Assert.NotNull(controller);

        UiElement? map = UiElement.FindDescendant(controller!.Root, MapPageController.MapWidgetId);
        Assert.NotNull(map);
        var markers = map!.Children
            .Where(c => c.DatElementId != MapPageController.PlayerIconId
                && c.DatElementId != MapPageController.HouseIconId)
            .OfType<UiButton>()
            .ToList();
        Assert.Equal(53, markers.Count);

        foreach (UiButton marker in markers)
        {
            UiElement highlight = Assert.Single(marker.Children);
            Assert.False(highlight.Visible);   // Normal: P0x3B=true
        }

        UiButton hovered = markers[0];
        UiElement hoveredHighlight = hovered.Children[0];
        hovered.OnEvent(new UiEvent(0, hovered, UiEventType.HoverEnter));
        Assert.True(hoveredHighlight.Visible); // Normal_rollover: P0x3B=false

        hovered.OnEvent(new UiEvent(0, hovered, UiEventType.HoverLeave));
        Assert.False(hoveredHighlight.Visible);
    }

    [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);
    }
}