using System.Numerics;
using AcDream.Core.CharGen;
using AcDream.Runtime;
using AcDream.Runtime.Session;

namespace AcDream.App.UI.Layout;

/// <summary>
/// Bindings the retail character-creation screen (<c>gmCharGenMainUI</c>)
/// needs beyond the borrowed view: generation-capturing command wrappers,
/// mirroring <see cref="CharacterSelectionRuntimeBindings"/>'s shape exactly.
/// Every <c>Func</c> here is a late-bound seam (Campaign CC — see
/// <c>feedback_resolve_deferred_funcs_per_call.md</c>): callers MUST resolve
/// it per-call, never capture the delegate once at mount time.
/// </summary>
/// <param name="OpenOnStart">Campaign CC slice CC4: the retail
/// transition is Create Character (<c>0x100003A0</c>) →
/// <c>QueueUIMode(0x1000000b)</c>, but that button stays ghosted until CC7's
/// closing move. This flag is the interim env/test-only open seam
/// (<c>ACDREAM_OPEN_CHARGEN=1</c> → <see cref="AcDream.App.RuntimeOptions.OpenCharacterCreationOnStart"/>)
/// so the screen can be exercised before the real button is wired.</param>
public sealed record CharacterCreationRuntimeBindings(
    Func<IRuntimeCharacterCreationView?> View,
    Func<uint, RuntimeCommandResult> SelectHeritage,
    Func<uint, RuntimeCommandResult> SelectGender,
    Func<uint, RuntimeCommandResult> SelectTemplate,
    Func<ChargenAttributeId, int, RuntimeCommandResult> SetAttribute,
    Func<ChargenAttributeId, bool, RuntimeCommandResult> SetAttributeLock,
    Func<uint, RuntimeCommandResult> TrainSkill,
    Func<uint, RuntimeCommandResult> SpecializeSkill,
    Func<uint, RuntimeCommandResult> UntrainSkill,
    Func<int, RuntimeCommandResult> SelectStartArea,
    Func<bool, RuntimeCommandResult> Finish,
    Action RequestExit,
    /// <summary>Campaign CC slice CC6b-MOUNT: the Appearance page's nine
    /// spin controls and nine color swatches.</summary>
    Func<ChargenAppearanceSlot, uint, RuntimeCommandResult>? SetAppearanceIndex = null,
    /// <summary>CC6b-MOUNT: the Appearance page's shade scrollbar.</summary>
    Func<ChargenShadeSlot, double, RuntimeCommandResult>? SetShade = null,
    /// <summary>DAT string lookup (table <c>0x23000002</c>, the SAME table
    /// every other <c>ID_CharGen_*</c>/<c>ID_Character*</c> key resolves
    /// through) — used by the Heritage page's composed description text.
    /// <see langword="null"/> degrades to the heritage's own DAT
    /// <c>Name</c> field instead of the full composed copy.</summary>
    Func<string, string?>? ResolveText = null,
    bool OpenOnStart = false);

/// <summary>
/// Projects Runtime's borrowed <see cref="IRuntimeCharacterCreationView"/>
/// through retail <c>gmCharGenMainUI</c>'s authored retained layout — the
/// mount + master shell (progress bar, tab strip, Back/Next/Finish/Help/
/// Exit/Random nav) plus the Heritage/Profession/Skills/Town pages this
/// slice builds. Fix round F6: the Appearance (<c>0x100003d4</c>) page root
/// is fully LIVE as of CC6b-MOUNT (<see cref="CharacterCreationAppearancePage"/>);
/// only the Summary (<c>0x100003d6</c>) page root remains mounted but
/// content-inert — CC5 fills it (register TS-82, narrowed to Summary-only
/// at CC6b-MOUNT).
///
/// <para>
/// Decomp anchors: root construction + child resolution
/// <c>gmCharGenMainUI::gmCharGenMainUI @ 0x004e7eb0</c> (root element
/// <c>0x100003cc</c> from enum <c>0x10000039</c>); page switching
/// <c>gmCharGenMainUI::SetProgressState @ 0x004e7a10</c> (the Olthoi
/// tab-hiding + redirect logic); nav dispatch
/// <c>gmCharGenMainUI::ListenToElementMessage @ 0x004e9450</c>; exit
/// confirmation <c>gmCharGenMainUI::DoExit @ 0x004e8650</c>; randomize
/// dispatch <c>gmCharGenMainUI::DoRandom @ 0x004e7d70</c>.
/// </para>
/// </summary>
internal sealed class CharacterCreationUiController : IDisposable
{
    internal const uint RootEnum = 0x10000039u;
    internal const uint RootElementId = 0x100003CCu;
    internal const uint ProgressBarElementId = 0x100003CEu;
    internal const uint BackElementId = 0x100003C6u;
    internal const uint NextElementId = 0x100003C7u;
    internal const uint FinishElementId = 0x100003C8u;
    internal const uint HelpElementId = 0x100003C9u;
    internal const uint ExitElementId = 0x100003CAu;
    internal const uint RandomElementId = 0x100003CBu;
    internal const uint MasterPageElementId = 0x100003D0u;
    internal const uint HeritagePageElementId = 0x100003D1u;
    internal const uint ProfessionPageElementId = 0x100003D2u;
    internal const uint SkillsPageElementId = 0x100003D3u;
    internal const uint AppearancePageElementId = 0x100003D4u;
    internal const uint TownPageElementId = 0x100003D5u;
    internal const uint SummaryPageElementId = 0x100003D6u;
    internal const uint HeritageTabElementId = 0x100003EFu;
    internal const uint ProfessionTabElementId = 0x100003F0u;
    internal const uint SkillsTabElementId = 0x100003F1u;
    internal const uint AppearanceTabElementId = 0x100003F2u;
    internal const uint TownTabElementId = 0x100003F3u;
    internal const uint SummaryTabElementId = 0x100003F4u;

    /// <summary>Retail's <c>gmCharGenMainUI::ECGProgress</c> enum values —
    /// used verbatim as the master page's per-page state ids
    /// (<c>0x10000025 + (page - 1)</c>) and the tab-hide/redirect math in
    /// <see cref="ApplyProgressState"/>.</summary>
    internal enum Page
    {
        Heritage = 1,
        Profession = 2,
        Skills = 3,
        Appearance = 4,
        Town = 5,
        Summary = 6,
    }

    internal sealed record DialogStrings(string ExitWarning);

    private readonly UiRoot _host;
    private readonly ImportedLayout _layout;
    private readonly UiElement _progressBar;
    private readonly UiButton _back;
    private readonly UiButton _next;
    private readonly UiButton _finish;
    private readonly UiButton _help;
    private readonly UiButton _exit;
    private readonly UiButton _random;
    private readonly UiElement _masterPage;
    private readonly UiElement _heritagePageRoot;
    private readonly UiElement _professionPageRoot;
    private readonly UiElement _skillsPageRoot;
    private readonly UiElement _appearancePageRoot;
    private readonly UiElement _townPageRoot;
    private readonly UiElement _summaryPageRoot;
    private readonly UiButton _heritageTab;
    private readonly UiButton _professionTab;
    private readonly UiButton _skillsTab;
    private readonly UiButton _appearanceTab;
    private readonly UiButton _townTab;
    private readonly UiButton _summaryTab;
    private readonly RetailDialogFactory _dialogs;
    private readonly CharacterCreationRuntimeBindings _bindings;
    private readonly DialogStrings _strings;
    private readonly CharacterCreationHeritagePage _heritagePage;
    private readonly CharacterCreationProfessionPage _professionPage;
    private readonly CharacterCreationSkillsPage _skillsPage;
    private readonly CharacterCreationTownPage _townPage;
    private readonly CharacterCreationAppearancePage _appearancePage;

    private Vector2 _authoredCanvas;
    private RuntimeGenerationToken _lastGeneration;
    private long _lastRevision = long.MinValue;
    private Page _currentPage = Page.Heritage;
    private bool _active;
    private bool _isOpen;
    private bool _openOnStartConsumed;
    private uint _exitDialogContext;
    private bool _suppressDialogCallbacks;
    private bool _disposed;

    private CharacterCreationUiController(
        UiRoot host,
        ImportedLayout layout,
        UiElement progressBar,
        UiButton back,
        UiButton next,
        UiButton finish,
        UiButton help,
        UiButton exit,
        UiButton random,
        UiElement masterPage,
        UiElement heritagePageRoot,
        UiElement professionPageRoot,
        UiElement skillsPageRoot,
        UiElement appearancePageRoot,
        UiElement townPageRoot,
        UiElement summaryPageRoot,
        UiButton heritageTab,
        UiButton professionTab,
        UiButton skillsTab,
        UiButton appearanceTab,
        UiButton townTab,
        UiButton summaryTab,
        Func<uint, uint, UiElement?> templateResolver,
        RetailDialogFactory dialogs,
        CharacterCreationRuntimeBindings bindings,
        DialogStrings strings)
    {
        _host = host;
        _layout = layout;
        _progressBar = progressBar;
        _back = back;
        _next = next;
        _finish = finish;
        _help = help;
        _exit = exit;
        _random = random;
        _masterPage = masterPage;
        _heritagePageRoot = heritagePageRoot;
        _professionPageRoot = professionPageRoot;
        _skillsPageRoot = skillsPageRoot;
        _appearancePageRoot = appearancePageRoot;
        _townPageRoot = townPageRoot;
        _summaryPageRoot = summaryPageRoot;
        _heritageTab = heritageTab;
        _professionTab = professionTab;
        _skillsTab = skillsTab;
        _appearanceTab = appearanceTab;
        _townTab = townTab;
        _summaryTab = summaryTab;
        _dialogs = dialogs;
        _bindings = bindings;
        _strings = strings;

        Root.Left = 0f;
        Root.Top = 0f;
        Root.ClickThrough = false;
        Root.Visible = false;
        // AD-98: the same authored 800x600 fixed-canvas treatment as the
        // character-management screen. Both controllers DECLARE/REVOKE
        // through UiRoot's owner-scoped arbiter (review fix round R1,
        // 2026-08-15) rather than writing UiRoot.FixedCanvasSize directly —
        // char-management can be simultaneously active underneath this
        // screen, and a raw write from either controller is a last-writer-
        // wins race with no owner (the F1 fix's own Close() null wiped
        // char-management's still-active canvas out from under it). See
        // Open/Close/Deactivate/Dispose below for the matching declare/
        // revoke pair.
        _authoredCanvas = new Vector2(
            Root.Width > 0f ? Root.Width : 800f,
            Root.Height > 0f ? Root.Height : 600f);

        _heritagePage = new CharacterCreationHeritagePage(heritagePageRoot, bindings, ApplyHeritageTabRestore);
        _professionPage = new CharacterCreationProfessionPage(professionPageRoot, bindings);
        _skillsPage = new CharacterCreationSkillsPage(skillsPageRoot, bindings, templateResolver);
        _townPage = new CharacterCreationTownPage(townPageRoot, bindings);
        _appearancePage = new CharacterCreationAppearancePage(appearancePageRoot, bindings);

        // gmCharGenMainUI::ListenToElementMessage @ 0x004e9450.
        _back.OnClick = OnBack;
        _next.OnClick = OnNext;
        // Finish (0x100003c8) stays ghosted this round: Summary
        // (0x100003d6) is CC5's placeholder, and DoFinish's real gate
        // sequence lives in RuntimeCharacterCreationState.TryBeginFinish —
        // wiring the button here without a Summary page to confirm/collect
        // the name would let a click reach the wire with an empty name and
        // silently refuse. No OnClick handler; _finish.Enabled stays false
        // (see ApplyProgressState).
        _finish.OnClick = null;
        // Help (0x100003c9) is not handled in gmCharGenMainUI's own
        // ListenToElementMessage switch (case 0x100003c9 falls straight
        // through to the base UIFramework handler) — retail has no custom
        // help action here either; leave it a no-op.
        _help.OnClick = null;
        _exit.OnClick = OnExit;
        _random.OnClick = OnRandom;
        _heritageTab.OnClick = () => ApplyProgressState(Page.Heritage);
        _professionTab.OnClick = () => ApplyProgressState(Page.Profession);
        _skillsTab.OnClick = () => ApplyProgressState(Page.Skills);
        _appearanceTab.OnClick = () => ApplyProgressState(Page.Appearance);
        _townTab.OnClick = () => ApplyProgressState(Page.Town);
        _summaryTab.OnClick = () => ApplyProgressState(Page.Summary);
    }

    internal UiElement Root => _layout.Root;

    /// <summary>The authored Appearance-page viewport (<c>0x100003bb</c>) —
    /// CC6b-MOUNT's composition root assigns its <c>Renderer</c> once the
    /// graphics backend exists (mirrors the paperdoll's own late
    /// <c>viewport.Renderer = ...</c> assignment).</summary>
    internal UiViewport? AppearanceViewport => _appearancePage.Viewport;

    /// <summary>CC6b-MOUNT: the late-bound zoom/rotate control surface —
    /// see <see cref="AcDream.App.Rendering.IChargenPreviewControl"/>'s own
    /// doc comment for why this is assigned after construction rather than
    /// threaded through the ctor.</summary>
    internal AcDream.App.Rendering.IChargenPreviewControl? AppearancePreviewControl
    {
        get => _appearancePage.PreviewControl;
        set => _appearancePage.PreviewControl = value;
    }

    /// <summary>Gates the Appearance preview's per-frame work on whether
    /// that specific page — AND the whole chargen screen — is the one
    /// currently showing. <c>Close()</c> only ever hides <see cref="Root"/>,
    /// not the individual page roots, so a page-root-only check would stay
    /// true after the screen closes on the Appearance page. Mirrors the
    /// paperdoll's own outer-inventory-frame gate.</summary>
    internal bool IsAppearancePageVisible => Root.Visible && _appearancePageRoot.Visible;

    internal static CharacterCreationUiController? CreateDetached(
        UiRoot host,
        ImportedLayout layout,
        Func<uint, uint, UiElement?> templateResolver,
        RetailDialogFactory dialogs,
        CharacterCreationRuntimeBindings bindings,
        DialogStrings strings)
    {
        ArgumentNullException.ThrowIfNull(host);
        ArgumentNullException.ThrowIfNull(layout);
        ArgumentNullException.ThrowIfNull(templateResolver);
        ArgumentNullException.ThrowIfNull(dialogs);
        ArgumentNullException.ThrowIfNull(bindings);
        ArgumentNullException.ThrowIfNull(strings);

        if (layout.Root.DatElementId != RootElementId
            || layout.FindElement(ProgressBarElementId) is not { } progressBar
            || layout.FindElement(BackElementId) is not UiButton back
            || layout.FindElement(NextElementId) is not UiButton next
            || layout.FindElement(FinishElementId) is not UiButton finish
            || layout.FindElement(HelpElementId) is not UiButton help
            || layout.FindElement(ExitElementId) is not UiButton exit
            || layout.FindElement(RandomElementId) is not UiButton random
            || layout.FindElement(MasterPageElementId) is not { } masterPage
            || layout.FindElement(HeritagePageElementId) is not { } heritagePageRoot
            || layout.FindElement(ProfessionPageElementId) is not { } professionPageRoot
            || layout.FindElement(SkillsPageElementId) is not { } skillsPageRoot
            || layout.FindElement(AppearancePageElementId) is not { } appearancePageRoot
            || layout.FindElement(TownPageElementId) is not { } townPageRoot
            || layout.FindElement(SummaryPageElementId) is not { } summaryPageRoot
            || layout.FindElement(HeritageTabElementId) is not UiButton heritageTab
            || layout.FindElement(ProfessionTabElementId) is not UiButton professionTab
            || layout.FindElement(SkillsTabElementId) is not UiButton skillsTab
            || layout.FindElement(AppearanceTabElementId) is not UiButton appearanceTab
            || layout.FindElement(TownTabElementId) is not UiButton townTab
            || layout.FindElement(SummaryTabElementId) is not UiButton summaryTab)
        {
            Console.WriteLine(
                "[UI] character creation: the authored root/master-shell contract is incomplete.");
            return null;
        }

        return new CharacterCreationUiController(
            host,
            layout,
            progressBar,
            back,
            next,
            finish,
            help,
            exit,
            random,
            masterPage,
            heritagePageRoot,
            professionPageRoot,
            skillsPageRoot,
            appearancePageRoot,
            townPageRoot,
            summaryPageRoot,
            heritageTab,
            professionTab,
            skillsTab,
            appearanceTab,
            townTab,
            summaryTab,
            templateResolver,
            dialogs,
            bindings,
            strings);
    }

    internal void AttachAndTick()
    {
        ObjectDisposedException.ThrowIf(_disposed, this);
        if (Root.Parent is null)
            _host.AddChild(Root);
        Tick();
    }

    internal void Tick()
    {
        if (_disposed)
            return;

        IRuntimeCharacterCreationView? view = _bindings.View();
        RuntimeCharacterCreationSnapshot snapshot = view?.Snapshot ?? default;
        if (view is null || !snapshot.IsActive)
        {
            Deactivate();
            _lastGeneration = snapshot.Generation;
            _lastRevision = snapshot.Revision;
            return;
        }

        if (!_active)
        {
            _active = true;
            // CC4 interim open seam (ACDREAM_OPEN_CHARGEN=1) — the real
            // Create-button transition is CC7's. Fires once per mount.
            if (_bindings.OpenOnStart && !_openOnStartConsumed)
            {
                _openOnStartConsumed = true;
                Open();
            }
        }

        if (_isOpen)
        {
            Root.Visible = true;
            _host.BringToFront(Root);
        }
        else
        {
            Root.Visible = false;
        }

        if (_lastGeneration != snapshot.Generation
            || _lastRevision != snapshot.Revision)
        {
            _heritagePage.Refresh(view, snapshot);
            _professionPage.Refresh(view, snapshot);
            _skillsPage.Refresh(view, snapshot);
            _townPage.Refresh(view, snapshot);
            _appearancePage.Refresh(view, snapshot);
            _lastGeneration = snapshot.Generation;
            _lastRevision = snapshot.Revision;
        }

        ReconcileDialogs(snapshot);
    }

    /// <summary>Opens the screen at retail's authored default page
    /// (<c>gmCharGenMainUI::gmCharGenMainUI</c>'s trailing
    /// <c>SetProgressState(this, ECG_HERTAGE)</c>). Declares the fixed
    /// canvas on this exact activation edge through <see cref="UiRoot"/>'s
    /// arbiter — matching <see cref="CharacterManagementUiController"/>'s
    /// own one-shot declare — not per-tick; <see cref="Close"/>/
    /// <see cref="Deactivate"/>/<see cref="Dispose"/> revoke it back out
    /// symmetrically, and the canvas stays set for as long as ANY other
    /// declarer (e.g. character-management underneath) remains active.</summary>
    internal void Open()
    {
        if (_disposed)
            return;
        _isOpen = true;
        _host.DeclareFixedCanvas(this, _authoredCanvas);
        ApplyProgressState(Page.Heritage);
    }

    private void Close()
    {
        if (!_isOpen)
            return;
        _isOpen = false;
        Root.Visible = false;
        _host.RevokeFixedCanvas(this);
    }

    public void Dispose()
    {
        if (_disposed)
            return;
        _disposed = true;
        try
        {
            CloseAllDialogs(suppressCallbacks: true);
        }
        finally
        {
            // Matches CharacterManagementUiController.Dispose's own
            // unconditional revoke — defends against disposing while
            // _isOpen (Close() is not otherwise called on this path). Idle
            // if Close() already revoked (RevokeFixedCanvas is a no-op for
            // an owner that already revoked).
            _host.RevokeFixedCanvas(this);
            _back.OnClick = null;
            _next.OnClick = null;
            _finish.OnClick = null;
            _help.OnClick = null;
            _exit.OnClick = null;
            _random.OnClick = null;
            _heritageTab.OnClick = null;
            _professionTab.OnClick = null;
            _skillsTab.OnClick = null;
            _appearanceTab.OnClick = null;
            _townTab.OnClick = null;
            _summaryTab.OnClick = null;
            _heritagePage.Dispose();
            _professionPage.Dispose();
            _skillsPage.Dispose();
            _townPage.Dispose();
            _appearancePage.Dispose();
            _host.RemoveChild(Root);
        }
    }

    // ── Nav dispatch (gmCharGenMainUI::ListenToElementMessage @ 0x004e9450) ──

    private void OnBack()
    {
        if (_disposed)
            return;
        if (_currentPage <= Page.Heritage)
        {
            OnExit();
            return;
        }
        ApplyProgressState(_currentPage - 1);
    }

    private void OnNext()
    {
        if (_disposed)
            return;
        if (_currentPage < Page.Summary)
            ApplyProgressState(_currentPage + 1);
    }

    private void OnExit()
    {
        if (_disposed)
            return;
        // gmCharGenMainUI::DoExit @ 0x004e8650's own guard: a second Exit
        // click while the confirmation is already open is a no-op.
        if (_exitDialogContext != 0u)
            return;

        _exitDialogContext = _dialogs.MakeConfirmation(
            _strings.ExitWarning,
            data =>
            {
                _exitDialogContext = 0u;
                if (_disposed || _suppressDialogCallbacks)
                    return;

                // RecvNotice_CloseDialog @ 0x004e9780's exit-context branch:
                // confirm -> QueueUIMode(0x1000000a) (leave chargen). Our
                // equivalent is closing this screen; whatever mounted the
                // character-management screen already keeps re-drawing it
                // underneath (this screen only BringToFront's itself while
                // open — see Tick).
                if (data.GetBoolean(RetailDialogProperty.ConfirmationResult))
                {
                    Close();
                    _bindings.RequestExit();
                }
            });
    }

    private void OnRandom()
    {
        if (_disposed)
            return;

        // gmCharGenMainUI::DoRandom @ 0x004e7d70. Heritage/Profession/Town
        // are ported below; Skills' CharGenState::RandomizeSkills and the
        // Summary randomize-warning dialog have no CC3 primitive/page yet
        // this round — register AP-212 covers both gaps, and _random.Enabled
        // already keeps the control ghosted on those pages (ApplyProgressState).
        IRuntimeCharacterCreationView? view = _bindings.View();
        if (view is null)
            return;
        RuntimeCharacterCreationSnapshot snapshot = view.Snapshot;

        switch (_currentPage)
        {
            case Page.Heritage:
                _heritagePage.Randomize(snapshot);
                break;
            case Page.Profession:
                _professionPage.Randomize(snapshot);
                break;
            case Page.Town:
                _townPage.Randomize(view);
                break;
        }
    }

    // ── Page switching (gmCharGenMainUI::SetProgressState @ 0x004e7a10) ────

    private void ApplyProgressState(Page target)
    {
        _heritagePageRoot.Visible = false;
        _professionPageRoot.Visible = false;
        _skillsPageRoot.Visible = false;
        _appearancePageRoot.Visible = false;
        _townPageRoot.Visible = false;
        _summaryPageRoot.Visible = false;
        _next.Visible = true;
        _finish.Visible = false;

        Page previous = _currentPage;
        _currentPage = target;
        _heritageTab.Selected = false;
        _professionTab.Selected = false;
        _skillsTab.Selected = false;
        _appearanceTab.Selected = false;
        _townTab.Selected = false;
        _summaryTab.Selected = false;

        uint heritageId = _bindings.View()?.Snapshot.HeritageId ?? 0u;
        bool isOlthoi = heritageId == (uint)ChargenHeritageGroup.Olthoi
            || heritageId == (uint)ChargenHeritageGroup.OlthoiAcid;
        if (isOlthoi)
        {
            _professionTab.Visible = false;
            _skillsTab.Visible = false;
            _townTab.Visible = false;
            if (_currentPage < previous)
            {
                if (_currentPage is Page.Profession or Page.Skills)
                    _currentPage = Page.Heritage;
                else if (_currentPage == Page.Town)
                    _currentPage = Page.Appearance;
            }
            else
            {
                if (_currentPage is Page.Profession or Page.Skills)
                    _currentPage = Page.Appearance;
                else if (_currentPage == Page.Town)
                    _currentPage = Page.Summary;
            }
        }
        else
        {
            _professionTab.Visible = true;
            _skillsTab.Visible = true;
            _townTab.Visible = true;
        }

        SetMasterPageState(0x10000025u + (uint)_currentPage - 1u);
        switch (_currentPage)
        {
            case Page.Heritage:
                _heritagePageRoot.Visible = true;
                _heritageTab.Selected = true;
                break;
            case Page.Profession:
                _professionPageRoot.Visible = true;
                _professionTab.Selected = true;
                break;
            case Page.Skills:
                _skillsPageRoot.Visible = true;
                _skillsTab.Selected = true;
                break;
            case Page.Appearance:
                _appearancePageRoot.Visible = true;
                _appearanceTab.Selected = true;
                break;
            case Page.Town:
                _townPageRoot.Visible = true;
                _townTab.Selected = true;
                break;
            case Page.Summary:
                _summaryPageRoot.Visible = true;
                _summaryTab.Selected = true;
                _next.Visible = false;
                _finish.Visible = true;
                break;
        }

        // Random (0x100003cb): fix round F5 — retail's DoRandom @0x004e7d70
        // case 3 fully ENABLES Random on Appearance (RandomizeClothing when
        // m_eCurType == ECG_CHOICE_CLOTHES, else RandomizeAppearance); this
        // is NOT a placeholder gap the way the old comment claimed. The
        // disable here rests on the SAME unported-primitive gap AP-212
        // tracks for Skills (no RandomizeSkills) and Summary (no
        // RandomizeCharacter) — RandomizeAppearance/RandomizeClothing are
        // two more of AP-212's six named-but-unported primitives.
        _random.Enabled = _currentPage
            is not (Page.Skills or Page.Appearance or Page.Summary);
        // Finish stays ghosted regardless of page — Summary is a
        // placeholder this round (see the ctor comment on _finish.OnClick).
        _finish.Enabled = false;

        _lastRevision = long.MinValue;
        Tick();
    }

    private void SetMasterPageState(uint stateId)
    {
        if (_masterPage is IUiDatStateful stateful)
            stateful.TrySetRetailState(stateId);
    }

    // ── Heritage tab-restore (gmCharGenMainUI::ListenToElementMessage @ ────
    // ── 0x004e9450, the heritage-button bubble arm) ─────────────────────

    /// <summary>SHOW ids (label_4e9673, three <c>SetVisible(1)</c> calls) —
    /// verbatim off the decompiled switch's case list at
    /// <c>0x004e9450</c>.</summary>
    private static readonly IReadOnlySet<uint> HeritageTabShowButtonIds = new HashSet<uint>
    {
        0x100003BFu, 0x100003C1u, 0x100003C2u, 0x100003C3u,
        0x10000590u, 0x10000591u, 0x100005A9u, 0x100005BFu,
        0x100005C4u, 0x100005E8u,
    };

    /// <summary>HIDE ids (@0x004e96b9, three <c>SetVisible(0)</c> calls) —
    /// the Olthoi/OlthoiAcid heritage buttons.</summary>
    private static readonly IReadOnlySet<uint> HeritageTabHideButtonIds = new HashSet<uint>
    {
        0x100005C7u, 0x100005C8u,
    };

    /// <summary>
    /// Ports <c>gmCharGenMainUI::ListenToElementMessage @ 0x004e9450</c>'s
    /// heritage-button tab-restore arm: heritage-button clicks bubble to
    /// the master shell and SYNCHRONOUSLY show/hide the Profession/Skills/
    /// Town tabs, independent of <see cref="ApplyProgressState"/>'s own
    /// tab-visibility recompute at page-switch time (that recompute only
    /// runs when Back/Next/a tab is clicked — not on every heritage pick).
    /// Retail quirk reproduced faithfully: Lugian's button id
    /// (<c>0x100005f1</c>) sits OUTSIDE both the SHOW and HIDE case lists
    /// in the decompiled switch, so clicking Lugian neither restores nor
    /// hides the tabs — a genuine retail bug (the tabs stay in whatever
    /// state the PREVIOUS heritage selection left them), not an acdream
    /// omission. Review fix round F3 (2026-08-15): this arm was entirely
    /// unported — before this fix, selecting a human heritage right after
    /// Olthoi/OlthoiAcid left the tabs hidden until the next Back/Next/tab
    /// click recomputed them.
    /// </summary>
    private void ApplyHeritageTabRestore(uint buttonElementId)
    {
        if (HeritageTabShowButtonIds.Contains(buttonElementId))
        {
            _professionTab.Visible = true;
            _skillsTab.Visible = true;
            _townTab.Visible = true;
        }
        else if (HeritageTabHideButtonIds.Contains(buttonElementId))
        {
            _professionTab.Visible = false;
            _skillsTab.Visible = false;
            _townTab.Visible = false;
        }
        // Else (including Lugian, 0x100005f1): no-op, matching retail.
    }

    private void ReconcileDialogs(RuntimeCharacterCreationSnapshot snapshot)
    {
        // Local-refusal / rejection surfacing is CC5's Summary-page job
        // (the Finish gate only fires from that page). This round only
        // needs the exit-confirmation dialog reconciled against disposal.
        _ = snapshot;
    }

    private void Deactivate()
    {
        if (_active)
        {
            _active = false;
            _openOnStartConsumed = false;
            Close();
        }
        CloseAllDialogs(suppressCallbacks: true);
    }

    private void CloseAllDialogs(bool suppressCallbacks)
    {
        bool previous = _suppressDialogCallbacks;
        _suppressDialogCallbacks |= suppressCallbacks;
        try
        {
            if (_exitDialogContext != 0u)
            {
                uint closing = _exitDialogContext;
                _exitDialogContext = 0u;
                _dialogs.CloseDialog(closing);
            }
        }
        finally
        {
            _suppressDialogCallbacks = previous;
        }
    }
}