// panel_input.cpp — the input + detection seam of the docked bank panel: left-click /
// wheel / keyboard routing, accelerator registration, tail-setting read/mutate helpers,
// and timer-driven new-content auto-tag detection. Mouse-MOVE lives in panel_drag; the
// fingerprint pass lives in panel_thumbnails (it owns the cache it invalidates).
// Compiled into the reaper_reasampler MODULE, without REAPERAPI_IMPLEMENT (main.cpp
// owns the API pointers). DAW-verified, not unit-tested.

#include <algorithm>
#include <map>
#include <set>
#include <string>
#include <vector>

#include "shell/panel/panel_state.h"
#include "shell/panel/panel_input.h"

#include "shell/actions/bank_actions.h" // bankPruneCommandId — the footer Prune dispatch
#include "shell/persist/session.h"      // ReaSamplerSession — view/tail reads + mutation
#include "core/view/view_mode_model.h"  // autoTagNewContent / NewItem / AutoTag
#include "shell/capture/item_read.h"    // itemGuid / itemLaneName — shared item-read seam
#include "shell/capture/track_guid.h"   // guidString — canonical track GUID key
#include "shell/view/view.h"            // mintManagedLanes / transportBlocksModeSwitch

// New-content detection: enumerate live tracks + items and read fixed-lane state to
// classify an item's lane as managed vs manual.
#define REAPERAPI_MINIMAL
#define REAPERAPI_WANT_CountTracks
#define REAPERAPI_WANT_GetTrack
#define REAPERAPI_WANT_GetMediaTrackInfo_Value
#define REAPERAPI_WANT_CountTrackMediaItems
#define REAPERAPI_WANT_GetTrackMediaItem
#define REAPERAPI_WANT_EnumProjects
#define REAPERAPI_WANT_MarkProjectDirty
#define REAPERAPI_WANT_Main_OnCommand
#include "reaper_plugin_functions.h"

// main.cpp owns REAPER's dispatch struct (the accelerator registers through it).
extern reaper_plugin_info_t* g_rec;

namespace reasampler::panel {

// The session's live tail setting (default None / 2 s when no session). Single read
// point so draw, wheel-adjust, and the capture read seam all agree on the source.
TailSetting currentTail() {
    return g_panel.session ? g_panel.session->tail() : TailSetting{};
}

// The registered activate action behind a footer mode segment, or 0 if the mode has none.
// Routing the segment through the SAME action the Actions list fires is what gives a
// panel-initiated switch the persist + repaint it used to skip; a mode with no such
// action (the model is N-mode, the UI ships two) resolves to 0 here, which
// modeSegmentEnabled reads as unroutable so the segment paints dead rather than live-
// but-inert. Non-anonymous: panel_render.cpp resolves the same id to compute that bool.
int modeActivateCommandId(const std::string& modeId) {
    ActionBarRow row{};
    if (modeId == kArrangeModeId)     row.suffix = "VIEW_ACTIVATE_ARRANGE";
    else if (modeId == kDesignModeId) row.suffix = "VIEW_ACTIVATE_DESIGN";
    else                              return 0;
    return resolveBarCommandId(row);
}

namespace {

// Commits the current tail setting to ext state and marks the active project dirty so the
// change travels inside the .rpp on Ctrl+S — closes the gap where toggle/scroll would dirty
// the project but never write the new value. No-ops cleanly on an unsaved project.
void markTailDirty() {
    if (g_panel.session) g_panel.session->saveToActiveProject();
    ReaProject* proj = EnumProjects(-1, nullptr, 0);
    if (proj) MarkProjectDirty(proj);
}

// Routes a click in a toolbar to the hit button's action via Main_OnCommand. Returns true
// iff the click was inside the bar band, so the caller stops before grid handling.
bool handleToolbarClick(int x, int y, const ActionBarRect& bar,
                        const std::vector<ActionBarRow>& rows) {
    if (bar.height <= 0) return false;
    const int hit = toolbarHit(x, y, bar, rows);
    if (hit < 0) {
        // Inside the band but in a gap / overflow dead-zone: claim it so it never falls through
        // to the grid. Outside the band: not ours.
        return y >= bar.y && y < bar.y + bar.height &&
               x >= bar.x && x < bar.x + bar.width;
    }
    const ActionBarRow& row = rows[static_cast<std::size_t>(hit)];
    // A disabled button (opposite-mode gate) is claimed but no-ops — the click never fires
    // the action and never falls through to the grid (a dead button reads as inert, not absent).
    if (!row.enabled) return true;
    const int cmd = resolveBarCommandId(row);
    if (cmd != 0 && Main_OnCommand) Main_OnCommand(cmd, 0);
    return true;
}

// True iff `tr` has I_FREEMODE==2 (fixed lanes enabled). Value verified in view.cpp;
// reproduced locally so this file stays self-contained.
constexpr int kFreeModeFixedLanes = 2;

bool isFixedLaneTrack(MediaTrack* tr) {
    return static_cast<int>(GetMediaTrackInfo_Value(tr, "I_FREEMODE")) == kFreeModeFixedLanes;
}

// Enumerates the live project's track + item GUIDs. Fills `allGuids` and, per item,
// whether it sits on a manual lane (exempt from auto-tag). `trackItemGuids` maps each
// track to its item GUIDs so a newly-detected item's PRE-EXISTING siblings resolve in
// one lookup. Manual-lane classification uses the single pure predicate isOnManualLane.
void enumerateLiveGuids(ReaProject* proj, std::set<std::string>& allGuids,
                        std::map<std::string, bool>& itemOnManualLane,
                        std::map<std::string, std::vector<std::string>>& trackItemGuids) {
    const int trackCount = CountTracks(proj);
    for (int t = 0; t < trackCount; ++t) {
        MediaTrack* tr = GetTrack(proj, t);
        if (!tr) continue;
        std::string tg = guidString(tr);
        if (!tg.empty()) allGuids.insert(tg);

        // Compute the fixed-lane status once per track (not per item) — I_FREEMODE is a
        // track-level attribute and is the same for every item on the track.
        const bool fixedLane = isFixedLaneTrack(tr);

        std::vector<std::string>& itemsOnTrack = trackItemGuids[tg];
        const int itemCount = CountTrackMediaItems(tr);
        for (int i = 0; i < itemCount; ++i) {
            MediaItem* it = GetTrackMediaItem(tr, i);
            if (!it) continue;
            std::string ig = itemGuid(it);
            if (ig.empty()) continue;
            allGuids.insert(ig);
            // "" for a normal track — isOnManualLane returns false immediately for a
            // non-fixed-lane track regardless of name.
            const std::string ln = fixedLane ? itemLaneName(tr, it) : std::string{};
            itemOnManualLane[ig] = isOnManualLane(fixedLane, ln);
            itemsOnTrack.push_back(ig);
        }
    }
}

// One detection tick: REAPER exposes no "item/track added" callback, so this diffs live
// GUIDs against the baseline and auto-tags the new ones into the active mode. Runs every
// timer tick regardless of panel open/close. READ-ONLY on the project; mutates only the
// in-memory membership index — deliberately OUTSIDE any Undo block (auto-tag is a
// background metadata update, not a destructive edit; an Undo block here would flood
// REAPER's history with an entry per tick that sees new content).
//
// Returns true iff this tick tagged at least one new GUID — the signal the caller uses to
// decide whether to run the lane-minting pass.
bool detectNewContent() {
    if (!g_panel.session) return false;

    ReaProject* proj = EnumProjects(-1, nullptr, 0);

    // A project (re)load re-arms the first-poll guard so we never diff across two
    // projects. bankPanelNotifyProjectLoaded() sets reloadPending on the tick persist
    // restores membership + active mode; draining it here re-baselines against the
    // fully-loaded set, so pre-existing untagged tracks stay Arrange rather than getting
    // mass-tagged. Using persist's load signal (not a local ReaProject* compare) is what
    // fixes the reload-mis-tag bug: pointer identity can recycle across projects.
    if (g_panel.reloadPending) {
        g_panel.contentBaseline.reset();
        g_panel.reloadPending = false;
    }

    std::set<std::string> live;
    std::map<std::string, bool> itemOnManualLane;
    std::map<std::string, std::vector<std::string>> trackItemGuids;
    enumerateLiveGuids(proj, live, itemOnManualLane, trackItemGuids);

    std::vector<std::string> added = g_panel.contentBaseline.observe(live);
    if (added.empty()) return false;  // first poll after open, or nothing new this tick

    ViewModeModel& model = g_panel.session->view();

    // An explicit tag wins: this detector classifies content the USER made, not
    // content the tool made and already classified.
    added.erase(std::remove_if(added.begin(), added.end(),
                               [&](const std::string& g) {
                                   return model.membership().query(g) != nullptr;
                               }),
                added.end());

    // Which of `added` are items (the manual-lane map keys every item; track GUIDs never
    // appear there). Used below to exclude sibling new items from a track's PRE-EXISTING
    // mode set — a drop plus its own new siblings must not count each other as prior.
    const std::set<std::string> newItemGuids = [&] {
        std::set<std::string> s;
        for (const std::string& g : added)
            if (itemOnManualLane.count(g)) s.insert(g);
        return s;
    }();

    // Item guid -> its track guid (reverse of trackItemGuids), so a new item's siblings
    // are found in one lookup.
    std::map<std::string, std::string> trackOfItem;
    for (const auto& [trackGuid, items] : trackItemGuids)
        for (const std::string& ig : items) trackOfItem[ig] = trackGuid;

    // The distinct modes the PRE-EXISTING, managed-eligible items on `trackGuid` resolve
    // to. Untagged siblings default to Arrange; new siblings excluded; manual-lane
    // siblings EXEMPT — matching planLaneMinting's own-item mode span computation.
    const auto preExistingTrackModes =
        [&](const std::string& trackGuid) -> std::set<std::string> {
        std::set<std::string> modes;
        auto it = trackItemGuids.find(trackGuid);
        if (it == trackItemGuids.end()) return modes;
        for (const std::string& sib : it->second) {
            if (newItemGuids.count(sib)) continue;   // a sibling added THIS tick — not prior
            auto ml = itemOnManualLane.find(sib);
            if (ml != itemOnManualLane.end() && ml->second) continue;  // manual lane — exempt
            const std::set<std::string> m = model.membership().modesOf(sib);
            if (m.empty()) modes.insert(kArrangeModeId);  // untagged ⇒ Arrange default
            else modes.insert(m.begin(), m.end());
        }
        return modes;
    };

    // Split the new GUIDs into tracks vs items so the pure decision can apply the
    // manual-lane exemption to items only. A GUID in the item-lane map is an item;
    // otherwise it's a track.
    std::vector<std::string> newTracks;
    std::vector<NewItem> newItems;
    for (const std::string& g : added) {
        auto it = itemOnManualLane.find(g);
        if (it == itemOnManualLane.end()) {
            newTracks.push_back(g);              // a track GUID
        } else {
            NewItem ni{g, it->second, {}};
            auto tk = trackOfItem.find(g);
            if (tk != trackOfItem.end()) ni.trackModes = preExistingTrackModes(tk->second);
            newItems.push_back(std::move(ni));   // an item; carries exemption + track modes
        }
    }

    const std::vector<AutoTag> tags =
        autoTagNewContent(newTracks, newItems, model.activeModeId());
    for (const AutoTag& tag : tags)
        model.membership().tag(tag.guid, tag.modeId);
    return !tags.empty();
}

// The item count the SELECTION reasons over. Occupied count == index size by
// construction, so the raw index size IS the dense selection-space extent.
int focusedItemCount() {
    const BankModel* idx = indexForRegion(g_panel.focusedRegion);
    return idx ? static_cast<int>(idx->size()) : 0;
}

// Handles a header/tab-strip/button click for the banks region. Returns true if the
// click was consumed (a region-chrome hit), false to fall through to grid selection.
bool handleBanksChromeClick(int x, int y, const RECT& region) {
    const RECT ftb = fullHtBtnRect(region);
    if (x >= ftb.left && x < ftb.right && y >= ftb.top && y < ftb.bottom) {
        bankPanelToggledBanksFullHeight();
        return true;
    }
    const RECT cb = createBtnRect(region);
    if (x >= cb.left && x < cb.right && y >= cb.top && y < cb.bottom) {
        doCreateBank();
        return true;
    }
    // Tab strip: chevrons scroll, a tab click SHOWS that bank (browse — NOT activate).
    const TabStripRect strip = banksTabStripRect(region);
    const std::vector<const Bank*> tabs = namedBanks();
    const int n = static_cast<int>(tabs.size());
    const TabHit hit = hitTestTabStrip(x, y, strip, n, kTabSpec, g_panel.tabScroll);
    if (hit.kind == TabHitKind::ScrollLeft || hit.kind == TabHitKind::ScrollRight) {
        const TabStripLayout layout =
            computeTabStripLayout(strip, n, kTabSpec, g_panel.tabScroll);
        const int step = kTabSpec.tabWidth;
        const int desired = g_panel.tabScroll +
                            (hit.kind == TabHitKind::ScrollLeft ? -step : step);
        g_panel.tabScroll = clampTabScroll(desired, layout);
        invalidatePanel();
        return true;
    }
    if (hit.kind == TabHitKind::Tab) {
        const Bank* bk = tabs[static_cast<std::size_t>(hit.index)];
        if (bk->id != g_panel.shownBankId) {
            g_panel.shownBankId = bk->id;          // browse: show this bank's grid
            g_panel.selection = Selection{};        // grid changed — reset selection
            stopAudition();
        }
        g_panel.focusedRegion = Region::Banks;
        invalidatePanel();
        return true;
    }
    return false;
}

// Handles the pool region's full-height toggle. Returns true if consumed.
bool handlePoolChromeClick(int x, int y, const RECT& region) {
    const RECT ftb = fullHtBtnRect(region);
    if (x >= ftb.left && x < ftb.right && y >= ftb.top && y < ftb.bottom) {
        bankPanelToggledPoolFullHeight();
        return true;
    }
    return false;
}

}  // namespace

// Applies a left-click at (x, y): route to top toolbar / footer (toggle / Tail / Prune) /
// bottom toolbar / region chrome / grid selection, and arm a potential drag when the click
// lands on a selected cell. Order mirrors the three-zone layout top-to-bottom.
void handleClick(int x, int y) {
    RECT cr{};
    GetClientRect(g_panel.hwnd, &cr);
    const int w = cr.right - cr.left, h = cr.bottom - cr.top;

    // TOP toolbar: the far-right More button first, then the frequent capture/placement
    // buttons. A button fires its registered action via the command-id contract; the band
    // is claimed whole (a gap/overflow miss is a harmless no-op, never a fall-through).
    {
        const MenuButtonRect mb = topMenuButtonRect(w);
        if (hitTestMenuButton(x, y, mb)) { showMoreMenu(); return; }
    }
    if (handleToolbarClick(x, y, topToolbarActionRect(w), topBarRows())) return;
    // Claim the WHOLE top band (including the reserved right strip between the last button and
    // the More button) so a click there is inert chrome, never a fall-through to the grid.
    if (y >= 0 && y < kTopToolbarHeight && x >= 0 && x < w) return;

    // Footer: mode toggle (left) -> Tail button -> Prune (right). Checked before the bottom
    // toolbar / grid so a footer click never selects a cell.
    {
        const int seg = footerToggleSegmentHit(x, y, w, h);
        if (seg >= 0) {
            const ViewModeModel& view = g_panel.session->view();
            const std::vector<Mode>& modes = view.modes().all();
            if (seg < static_cast<int>(modes.size())) {
                const std::string& id = modes[static_cast<std::size_t>(seg)].id;
                const bool isActive = id == view.activeModeId();
                const int cmd = modeActivateCommandId(id);
                // Disabled/dead rationale: core/ui/footer_bar.h. Claimed but inert, the
                // same shape a disabled toolbar row takes — never falls through to the grid.
                if (modeSegmentEnabled(isActive, g_panel.modeSwitchBlocked, cmd != 0)) {
                    if (cmd != 0 && Main_OnCommand) Main_OnCommand(cmd, 0);
                }
            }
            return;
        }

        const FooterBarLayout fb = footerBarLayoutFor(w, h);
        if (g_panel.session && hitTestFooterBar(x, y, fb) == FooterHit::Tail) {
            // Cycles None -> Auto -> Manual -> None; touches NOTHING in the bank/arrange.
            TailSetting& tail = g_panel.session->tail();
            tail.mode = cycleTailMode(tail.mode);
            markTailDirty();
            invalidatePanel();
            return;
        }

        // Fires through its registered command id (not the session directly) so the panel
        // affordance and the bindable action share the one guarded dry-run/confirm/delete
        // path in doBankPruneFolder.
        const ButtonRect pb = pruneButtonRectFor(w, h);
        if (hitTestPruneButton(x, y, pb)) {
            const int cmd = bankPruneCommandId();
            if (cmd != 0) Main_OnCommand(cmd, 0);
            return;
        }
    }

    if (handleToolbarClick(x, y, bottomToolbarRect(w, h), bottomBarRows())) return;

    if (poolShown()) {
        const RECT pr = poolRegionRect(w, h);
        if (y >= pr.top && y < regionGridRect(pr, false).top) {
            if (handlePoolChromeClick(x, y, pr)) return;
        }
    }
    if (banksShown()) {
        const RECT br = banksRegionRect(w, h);
        if (y >= br.top && y < regionGridRect(br, true).top) {
            if (handleBanksChromeClick(x, y, br)) return;
        }
    }

    Region reg = Region::Pool;
    if (!regionAt(x, y, reg)) return;
    const bool isBanks = reg == Region::Banks;
    const RECT region = isBanks ? banksRegionRect(w, h) : poolRegionRect(w, h);
    // Hit-test the SPARSE slot layout, then map the slot to a selection ordinal. An empty
    // (gap) slot hits selectionForSlot == -1, which reads as a grid miss below (a click on
    // a gap clears selection, exactly like a click in the margin).
    const RegionDisplay disp = regionDisplay(region, isBanks, reg);
    const int hitSlot = hitTestSlot(x, y, disp.slotRects);
    const int hit = hitSlot < 0 ? -1 : disp.selectionForSlot(hitSlot);
    const int count = disp.occupiedCount();

    // Switching focus region reseeds the selection there.
    if (g_panel.focusedRegion != reg) {
        g_panel.focusedRegion = reg;
        g_panel.selection = Selection{};
        stopAudition();
    }

    if (hit < 0) {
        if (!g_panel.selection.empty() || g_panel.selection.focus >= 0) {
            g_panel.selection = Selection{};
            stopAudition();
        }
        invalidatePanel();
        return;
    }

    // Drag-arm disambiguation for plain (no ctrl, no shift) presses on a grid cell:
    // already-selected cell defers the selection change to LBUTTONUP (so a plain press on
    // a multi-selection doesn't collapse it before we know whether a drag will happen; only
    // the caret moves immediately); unselected cell applies the plain-click selection now
    // (collapses to the single pressed cell) so a press-and-drag works without a prior
    // selecting click and focusedSelectionIds() resolves the right payload once the
    // threshold is crossed. ctrl/shift presses are selection-only — no drag arm.
    const bool onSelected = g_panel.selection.contains(hit);
    if (!ctrlDown() && !shiftDown()) {
        if (!onSelected) {
            // Commit the single-cell selection now so the drag payload is correct.
            g_panel.selection = applyClick(g_panel.selection, hit, false, false, count);
            g_panel.selItemCount = count;
        } else {
            // Move the caret to the pressed cell; defer collapsing multi-selection.
            g_panel.selection.focus = hit;
        }
        g_panel.dragArmed = true;
        g_panel.dragStartX = x;
        g_panel.dragStartY = y;
        g_panel.dragSourceRegion = reg;
        // Capture the mouse NOW so WM_MOUSEMOVE is still delivered once the pointer leaves the
        // client rect before the drag threshold is crossed — without capture, a fast
        // straight-out drag never transitions dragArmed -> dragging. Released on button-up or
        // WM_CAPTURECHANGED (which already calls resetDragState).
        SetCapture(g_panel.hwnd);
        invalidatePanel();
        return;
    }

    g_panel.selection = applyClick(g_panel.selection, hit, ctrlDown(), shiftDown(), count);
    g_panel.selItemCount = count;
    invalidatePanel();
}

// Fine-adjusts the Manual tail length in kManualStepMs steps ONLY when the cursor is over
// the footer strip AND the mode is Manual — wheel up lengthens, down shortens, clamped to
// [0, kMaxTailMs]. Otherwise does nothing (returns false so the caller can let REAPER/the
// docker handle the wheel normally). Returns true iff the wheel was consumed.
bool handleWheel(int x, int y, int delta) {
    if (!g_panel.session) return false;
    if (!pointInFooter(x, y)) return false;

    TailSetting& tail = g_panel.session->tail();
    if (tail.mode != TailMode::Manual) return false;  // fine-adjust is Manual-only

    // One notch is WHEEL_DELTA (120); accumulate whole notches so a high-res trackpad
    // that sends fractional deltas still steps predictably. Sign carries direction.
    const int notches = delta / 120;
    if (notches == 0) return false;  // sub-notch movement — nothing to apply yet

    const double before = tail.manualMs;
    tail.manualMs = adjustManualMs(tail.manualMs, notches, kManualStepMs);
    if (tail.manualMs == before) return true;  // already at a bound — consumed, no change

    markTailDirty();
    invalidatePanel();  // label shows the new length live
    return true;
}

namespace {

bool isOurWindow(HWND hwnd) {
    for (HWND w = hwnd; w; w = GetParent(w))
        if (w == g_panel.hwnd) return true;
    return false;
}

bool handleKey(int vk) {
    const int count = focusedItemCount();
    if (count <= 0) return false;

    switch (vk) {
        case VK_LEFT:
        case VK_RIGHT:
        case VK_UP:
        case VK_DOWN: {
            const NavKey nk = vk == VK_LEFT    ? NavKey::Left
                              : vk == VK_RIGHT ? NavKey::Right
                              : vk == VK_UP    ? NavKey::Up
                                               : NavKey::Down;
            g_panel.selection = navigate(g_panel.selection, nk,
                                         columnsForRegion(g_panel.focusedRegion),
                                         count, shiftDown());
            g_panel.selItemCount = count;
            invalidatePanel();
            return true;
        }
        case VK_RETURN:
        case VK_SPACE:
            if (g_panel.selection.focus >= 0)
                startAudition(g_panel.selection.focus);
            return true;
        case VK_ESCAPE:
            stopAudition();
            return true;
        case VK_DELETE: {
            // Remove the focused-region selection. Silent; a no-op when nothing is selected.
            const std::vector<std::string> sel = focusedSelectionIds();
            if (sel.empty()) return false;  // nothing selected — let the key fall through
            removeSamples(sel, bankIdForRegion(g_panel.focusedRegion));
            return true;
        }
        default:
            return false;
    }
}

int translateAccel(MSG* msg, accelerator_register_t* /*ctx*/) {
    if (!msg || msg->message != WM_KEYDOWN) return 0;
    if (!g_panel.open || !g_panel.hwnd) return 0;
    if (!isOurWindow(GetFocus())) return 0;
    return handleKey(static_cast<int>(msg->wParam)) ? 1 : 0;
}

accelerator_register_t g_accel{translateAccel, true, nullptr};
bool g_accelRegistered = false;

}  // namespace

void registerAccel() {
    if (g_accelRegistered || !g_rec) return;
    g_rec->Register("accelerator", &g_accel);
    g_accelRegistered = true;
}

void unregisterAccel() {
    if (!g_accelRegistered || !g_rec) return;
    g_rec->Register("-accelerator", &g_accel);
    g_accelRegistered = false;
}

}  // namespace reasampler::panel

namespace reasampler {

void bankPanelNotifyProjectLoaded() {
    // Arms the new-content detector to re-baseline on its next tick so the just-loaded
    // project's pre-existing content is the baseline (nothing new) rather than diffed
    // against the previous project and mass-tagged. A flag, not an inline reset, because
    // detectNewContent owns the baseline and runs later in the SAME OnTimer tick.
    panel::g_panel.reloadPending = true;
}

void bankPanelRefresh() {
    // New-content auto-tag detection runs EVERY tick regardless of panel open/close:
    // tracks/items are created in the arrange view, not the panel. READ-ONLY on the
    // project; only mutates the in-memory membership index.
    const bool tagged = panel::detectNewContent();

    // Lane minting runs ONLY when detection just tagged new content — a track can only
    // newly become multi-mode when auto-tag placed content on it. Unlike the invisible
    // membership tag above, minting is a visible structural mutation
    // (I_FREEMODE/I_FIXEDLANE/P_LANENAME), so mintManagedLanes wraps it in its own Undo
    // block and only mints for tracks that hold >1 mode's content. Managed lanes only.
    if (tagged && panel::g_panel.session) {
        ReaProject* proj = EnumProjects(-1, nullptr, 0);
        mintManagedLanes(panel::g_panel.session->view(), proj);
    }

    if (!panel::g_panel.open || !panel::g_panel.hwnd) return;

    // Transport transitions are not ours to cause and REAPER offers no change callback,
    // so the mode segments' disabled state is polled here and repainted only on an edge.
    const bool blocked = transportBlocksModeSwitch(nullptr);
    if (blocked != panel::g_panel.modeSwitchBlocked) {
        panel::g_panel.modeSwitchBlocked = blocked;
        InvalidateRect(panel::g_panel.hwnd, nullptr, FALSE);
    }

    // The custom hover-delay tooltip is driven off this poll tick (no dedicated timer) — if
    // a toolbar button has rested under the pointer past the delay, latch + repaint it.
    panel::maybeShowTooltip();

    if (panel::refreshFingerprint())
        InvalidateRect(panel::g_panel.hwnd, nullptr, FALSE);
}

capture::TailSetting bankPanelTailSetting() {
    // The authoritative setting lives in the session so it travels inside the .rpp; this
    // is the read seam for the capture actions. manualMs is clamped here so a caller
    // always receives a within-cap length regardless of what was stored/scrolled.
    capture::TailSetting s = panel::currentTail();
    s.manualMs = capture::clampManualMs(s.manualMs);
    return s;
}

}  // namespace reasampler
