// views/quad_view.js — Quad-View: vier Plots (2x2) + optionales Meter-Panel (wie Split-View)

import * as viewGoni from './goniometer_rtw.js';
import * as viewPhaseWheel from './phase_wheel.js';
import * as viewPanel from './panel.js';
import * as viewRealtime from './realtime.js';
import * as viewClassicNeedles from './classic_needles.js';
import * as viewPeakHistory from './peak_history.js';
import * as viewClock from './clock.js';
import * as viewWaveform from './waveform.js';
import * as viewSpectrogram from './spectrogram.js';
import { DEFAULT_TOP_INSET, FRAME_COLOR, PANEL_BG } from '../core/theme.js';

export const id = 'quad-view';

const CONTENT_TOP = DEFAULT_TOP_INSET;
const CONTENT_BOTTOM = 0;

const CHILD_VIEWS = {
  'realtime': viewRealtime,
  'classic-needles': viewClassicNeedles,
  'peak-history': viewPeakHistory,
  'goniometer-rtw': viewGoni,
  'phase-wheel': viewPhaseWheel,
  'panel': viewPanel,
  'clock': viewClock,
  'waveform': viewWaveform,
  'spectrogram': viewSpectrogram,
};
const ALLOWED_CHILD_VIEW_IDS = new Set(['none', ...Object.keys(CHILD_VIEWS)]);
const ALLOWED_PLOT_IDS = new Set(['none', 'phase-wheel', 'realtime', 'goniometer-rtw', 'peak-history', 'classic-needles', 'panel', 'clock', 'waveform', 'spectrogram']);
const ALLOWED_METER_IDS = new Set(['none', 'vu', 'ppm-ebu', 'ppm-din', 'tp', 'hifi-peak', 'rms', 'lufs', 'stopwatch']);
const ALLOWED_METER_POSITIONS = new Set(['left', 'center', 'right']);

const OUTER_GAP = 10;
const SIDE_INNER_GAP = 8;
const ROW_GAP = 10;
const METER_GAP = 12;
const METER_W_DEFAULT = 140;
const METER_W_MIN = 90;
const MIN_PLOT_W = 240;
const METER_PAD_TOP = 15;
const METER_PAD_BOTTOM = 5;
const METER_SLOT_SHRINK = 24;
const METER_EXTRA_BOTTOM_PAD = 6;

function sanitizeChildId(val, fallback) {
  return ALLOWED_CHILD_VIEW_IDS.has(val) ? val : fallback;
}

function sanitizePlotId(val, fallback) {
  return ALLOWED_PLOT_IDS.has(val) ? val : fallback;
}

function sanitizeMeterId(val, fallback) {
  const id = String(val || '');
  return ALLOWED_METER_IDS.has(id) ? id : fallback;
}

function sanitizeMeterPos(val, fallback) {
  const id = String(val || '');
  return ALLOWED_METER_POSITIONS.has(id) ? id : fallback;
}

function clampMeterCount(val) {
  const n = Number(val);
  if (!Number.isFinite(n)) return 0;
  return Math.max(0, Math.min(3, n | 0));
}

async function withClippedSubRect(g, rect, fn) {
  g.save();
  g.translate(rect.x, rect.y);
  g.beginPath();
  g.rect(0, 0, rect.w, rect.h);
  g.clip();
  try { return await fn(); } finally { g.restore(); }
}

function drawSubframe(g, rect) {
  g.save();
  g.strokeStyle = FRAME_COLOR;
  g.lineWidth = 2;
  g.strokeRect(rect.x + 0.5, rect.y + 0.5, Math.max(0, rect.w - 1), Math.max(0, rect.h - 1));
  g.restore();
}

function createStaticLayerCanvas(width, height) {
  const w = Math.max(1, width | 0);
  const h = Math.max(1, height | 0);
  if (typeof OffscreenCanvas !== 'undefined') return new OffscreenCanvas(w, h);
  const c = document.createElement('canvas');
  c.width = w;
  c.height = h;
  return c;
}

function drawCachedStaticLayer(state, g, layerId, key, rect, build) {
  if (!state || !rect || rect.w <= 0 || rect.h <= 0) return;
  if (!state.staticLayers) state.staticLayers = new Map();
  const fullKey = `${layerId}:${key}:${Math.max(0, rect.w | 0)}x${Math.max(0, rect.h | 0)}`;
  let layer = state.staticLayers.get(fullKey);
  if (!layer) {
    const canvas = createStaticLayerCanvas(rect.w, rect.h);
    const ctx = canvas.getContext('2d');
    build(ctx, rect);
    layer = { canvas };
    state.staticLayers.set(fullKey, layer);
  }
  g.drawImage(layer.canvas, rect.x, rect.y);
}

function drawEmptyPlot(state, g, rect, label) {
  drawCachedStaticLayer(state, g, 'empty-plot', String(label || '(leer)'), rect, (lg) => {
    lg.fillStyle = PANEL_BG;
    lg.fillRect(0, 0, rect.w, rect.h);
    lg.fillStyle = '#9aa';
    lg.textAlign = 'left';
    lg.font = 'bold 14px ui-monospace, monospace';
    lg.fillText(label || '(leer)', 12, 32);
    lg.textAlign = 'start';
  });
}

function readQuadMeters(CONFIG) {
  const count = clampMeterCount(CONFIG?.QUAD_VIEW_METER_COUNT);
  const slots = [
    {
      id: sanitizeMeterId(CONFIG?.QUAD_VIEW_METER_1, 'vu'),
      pos: sanitizeMeterPos(CONFIG?.QUAD_VIEW_METER_1_POS, 'right'),
    },
    {
      id: sanitizeMeterId(CONFIG?.QUAD_VIEW_METER_2, 'ppm-din'),
      pos: sanitizeMeterPos(CONFIG?.QUAD_VIEW_METER_2_POS, 'right'),
    },
    {
      id: sanitizeMeterId(CONFIG?.QUAD_VIEW_METER_3, 'lufs'),
      pos: sanitizeMeterPos(CONFIG?.QUAD_VIEW_METER_3_POS, 'right'),
    },
  ].slice(0, count);
  return slots;
}

function groupMetersByPosition(slots) {
  const out = { left: [], center: [], right: [] };
  for (const s of slots || []) {
    if (!s) continue;
    if (s.pos === 'left') out.left.push(s.id);
    else if (s.pos === 'center') out.center.push(s.id);
    else out.right.push(s.id);
  }
  return out;
}

function computeBaseLayout(rect, slots) {
  const contentH = Math.max(0, rect.h - CONTENT_TOP - CONTENT_BOTTOM);
  const hasContent = contentH >= 140;
  const BLOCK_GAP = SIDE_INNER_GAP;

  let effectiveSlots = hasContent ? (Array.isArray(slots) ? slots.slice(0, 3) : []) : [];
  while (true) {
    const grouped = groupMetersByPosition(effectiveSlots);
    const leftCount = grouped.left.length;
    const centerCount = grouped.center.length;
    const rightCount = grouped.right.length;
    const totalSlots = leftCount + centerCount + rightCount;
    const hasLeftMeters = leftCount > 0;
    const hasCenterMeters = centerCount > 0;
    const hasRightMeters = rightCount > 0;

    const interBlockGaps =
      (hasLeftMeters ? BLOCK_GAP : 0) +
      (hasRightMeters ? BLOCK_GAP : 0) +
      (hasCenterMeters ? (2 * BLOCK_GAP) : OUTER_GAP);

    const internalGaps =
      Math.max(0, leftCount - 1) * METER_GAP +
      Math.max(0, centerCount - 1) * METER_GAP +
      Math.max(0, rightCount - 1) * METER_GAP;

    const minRequired = 2 * MIN_PLOT_W + interBlockGaps + internalGaps;
    const remainingForMeters = rect.w - minRequired;

    let slotW = 0;
    if (totalSlots > 0) {
      slotW = Math.floor(remainingForMeters / totalSlots);
      slotW = Math.min(METER_W_DEFAULT, slotW);
    }

    if (totalSlots > 0 && slotW < METER_W_MIN && effectiveSlots.length) {
      effectiveSlots = effectiveSlots.slice(0, -1);
      continue;
    }
    if (totalSlots > 0) slotW = Math.max(METER_W_MIN, Math.min(METER_W_DEFAULT, slotW));

    const leftW = hasLeftMeters ? (leftCount * slotW + Math.max(0, leftCount - 1) * METER_GAP) : 0;
    const centerW = hasCenterMeters ? (centerCount * slotW + Math.max(0, centerCount - 1) * METER_GAP) : 0;
    const rightW = hasRightMeters ? (rightCount * slotW + Math.max(0, rightCount - 1) * METER_GAP) : 0;

    const metersTotalW = leftW + centerW + rightW;
    const plotAvail = Math.max(0, rect.w - interBlockGaps - metersTotalW);
    const leftPlotW = Math.floor(plotAvail / 2);
    const rightPlotW = plotAvail - leftPlotW;

    const plotFits = leftPlotW >= MIN_PLOT_W && rightPlotW >= MIN_PLOT_W;
    if (!plotFits && effectiveSlots.length) {
      effectiveSlots = effectiveSlots.slice(0, -1);
      continue;
    }

    let x = 0;
    const leftMetersRect = hasLeftMeters ? { x, y: CONTENT_TOP, w: leftW, h: contentH } : null;
    if (leftMetersRect) x += leftW + BLOCK_GAP;

    const leftPlotRect = { x, y: 0, w: leftPlotW, h: rect.h };
    x += leftPlotW;

    let centerMetersRect = null;
    if (hasCenterMeters) {
      x += BLOCK_GAP;
      centerMetersRect = { x, y: CONTENT_TOP, w: centerW, h: contentH };
      x += centerW + BLOCK_GAP;
    } else {
      x += OUTER_GAP;
    }

    const rightPlotRect = { x, y: 0, w: rightPlotW, h: rect.h };
    x += rightPlotW;

    let rightMetersRect = null;
    if (hasRightMeters) {
      x += BLOCK_GAP;
      rightMetersRect = { x, y: CONTENT_TOP, w: rightW, h: contentH };
    }

    return {
      plots: { left: leftPlotRect, right: rightPlotRect },
      meters: { left: leftMetersRect, center: centerMetersRect, right: rightMetersRect },
      meterIds: grouped,
      slotW,
      effectiveSlots,
    };
  }
}

function splitRectToRows(rect) {
  const w = Math.max(0, rect?.w || 0);
  const h = Math.max(0, rect?.h || 0);
  const gap = Math.max(0, ROW_GAP);
  const topH = Math.max(0, Math.floor((h - gap) / 2));
  const bottomH = Math.max(0, h - gap - topH);
  return {
    top: { x: rect.x, y: rect.y, w, h: topH },
    bottom: { x: rect.x, y: rect.y + topH + gap, w, h: bottomH },
  };
}

function unionRectHoriz(a, b) {
  if (!a && !b) return null;
  if (!a) return { ...b };
  if (!b) return { ...a };
  const left = Math.min(a.x, b.x);
  const right = Math.max(a.x + a.w, b.x + b.w);
  const top = Math.min(a.y, b.y);
  const bottom = Math.max(a.y + a.h, b.y + b.h);
  return { x: left, y: top, w: Math.max(0, right - left), h: Math.max(0, bottom - top) };
}

function ensureChildRectSize(env, rect, child) {
  if (!child || child.id === 'none' || !rect) return;
  const sig = `${Math.max(0, rect.w | 0)}x${Math.max(0, rect.h | 0)}`;
  if (child._lastSizeSig === sig) return;
  child._lastSizeSig = sig;
  resizeChild(env, { x: 0, y: 0, w: rect.w, h: rect.h }, child);
}

async function drawMetersPanel(env, state, rect, meterIds, slotW) {
  const { ctx: g, meters, config: CONFIG } = env;
  if (!rect || rect.w <= 0 || rect.h <= 0) return;
  const ids = Array.isArray(meterIds) ? meterIds.slice(0, 3) : [];
  const count = ids.length;
  if (!count) return;

  drawCachedStaticLayer(state, g, 'meter-panel-shell', 'bg-frame', rect, (lg) => {
    lg.fillStyle = PANEL_BG;
    lg.fillRect(0, 0, rect.w, rect.h);
    drawSubframe(lg, { x: 0, y: 0, w: rect.w, h: rect.h });
  });

  const gap = METER_GAP;
  const n = Math.max(1, Math.min(3, count));
  const usedW = n * slotW + (n - 1) * gap;
  const startX = rect.x + Math.max(0, Math.floor((rect.w - usedW) / 2));
  const shrink = Math.max(0, METER_SLOT_SHRINK);
  const innerHeight = Math.max(40, rect.h - METER_PAD_TOP - METER_PAD_BOTTOM - shrink - METER_EXTRA_BOTTOM_PAD);
  const innerOffset = shrink / 2;
  const slotY = rect.y + METER_PAD_TOP + innerOffset;
  const slotH = innerHeight;

  for (let i = 0; i < n; i++) {
    const id = sanitizeMeterId(ids[i], 'none');
    const r = { x: startX + i * (slotW + gap), y: slotY, w: slotW, h: slotH };
    if (id === 'none') {
      drawCachedStaticLayer(state, g, 'meter-slot-empty', `${slotW}x${slotH}`, r, (lg) => {
        lg.strokeStyle = 'rgba(0,231,255,0.25)';
        lg.setLineDash([6, 5]);
        lg.strokeRect(0.5, 0.5, Math.max(0, r.w - 1), Math.max(0, r.h - 1));
        lg.setLineDash([]);
        lg.fillStyle = '#9aa';
        lg.textAlign = 'center';
        lg.font = '12px ui-monospace, monospace';
        lg.fillText('(leer)', r.w / 2, 22);
        lg.textAlign = 'start';
      });
    } else {
      try {
        g.save();
        g.beginPath();
        g.rect(rect.x + 1, rect.y + 1, Math.max(0, rect.w - 2), Math.max(0, rect.h - 2));
        g.clip();
        await meters.draw(g, r, id, CONFIG);
        g.restore();
      } catch (e) {
        g.restore();
        console.warn('Quad meter draw error:', e);
      }
    }
  }
}

function destroyChild(child) {
  if (!child || child.id === 'none') return;
  const mod = CHILD_VIEWS[child.id];
  if (mod && typeof mod.destroy === 'function') {
    try { mod.destroy(child.state); } catch (e) { console.warn('Quad child destroy error:', e); }
  }
}

function initChild(env, childId) {
  const id = sanitizeChildId(childId, 'none');
  if (id === 'none') return { id: 'none', state: {} };
  const mod = CHILD_VIEWS[id];
  const state = (mod && typeof mod.init === 'function') ? (mod.init(env) || {}) : {};
  return { id, state };
}

function resizeChild(env, rect, child) {
  if (!child || child.id === 'none') return;
  const mod = CHILD_VIEWS[child.id];
  if (!mod || typeof mod.resize !== 'function') return;
  try { mod.resize({ rect }, child.state); } catch (e) { console.warn('Quad child resize error:', e); }
}

async function renderChild(env, rect, child, opts = {}) {
  const { ctx: g } = env;
  if (!child || child.id === 'none') return;
  const mod = CHILD_VIEWS[child.id];
  if (!mod || typeof mod.render !== 'function') return;
  const topInset = Number.isFinite(Number(opts.topInset)) ? Number(opts.topInset) : null;
  await withClippedSubRect(g, rect, async () => {
    const plotOnlySlots = (viewId) => {
      if (viewId === 'peak-history' || viewId === 'classic-needles' || viewId === 'panel') {
        const configured = env?.slots?.(viewId);
        if (Array.isArray(configured) && configured.length) return configured;
      }
      if (viewId === 'peak-history') return ['ppm-din'];
      if (viewId === 'classic-needles') return ['vu'];
      if (viewId === 'panel') return ['vu', 'ppm-ebu', 'ppm-din', 'tp', 'rms'];
      return ['none'];
    };
    const subEnv = Object.assign({}, env, {
      rect: { x: 0, y: 0, w: rect.w, h: rect.h },
      embedded: true,
      containerView: 'quad-view',
      slots: plotOnlySlots,
      embeddedOffsetX: rect.x,
      embeddedOffsetY: rect.y,
    });
    if (topInset !== null) subEnv.topInset = topInset;
    await mod.render(subEnv, child.state);
  });
}

export function init(env) {
  const tlId = sanitizePlotId(env?.config?.QUAD_VIEW_TL, 'phase-wheel');
  const trId = sanitizePlotId(env?.config?.QUAD_VIEW_TR, 'realtime');
  const blId = sanitizePlotId(env?.config?.QUAD_VIEW_BL, 'goniometer-rtw');
  const brId = sanitizePlotId(env?.config?.QUAD_VIEW_BR, 'none');
  const state = {
    staticLayers: new Map(),
    tl: initChild(env, tlId),
    tr: initChild(env, trId),
    bl: initChild(env, blId),
    br: initChild(env, brId),
    popup: initChild(env, 'none'),
    lastTlId: tlId,
    lastTrId: trId,
    lastBlId: blId,
    lastBrId: brId,
    lastPopupId: 'none',
    lastRectSig: '',
  };
  return state;
}

export function destroy(state) {
  if (state) state.staticLayers = null;
  destroyChild(state?.tl);
  destroyChild(state?.tr);
  destroyChild(state?.bl);
  destroyChild(state?.br);
  destroyChild(state?.popup);
}

export function resize({ rect }, state) {
  if (!state || !rect) return;
  const sig = `${rect.w}x${rect.h}`;
  if (state.lastRectSig === sig) return;
  state.lastRectSig = sig;
  const w = Math.max(0, rect.w);
  const h = Math.max(0, rect.h);
  const contentY = CONTENT_TOP;
  const contentH = Math.max(0, h - CONTENT_TOP - CONTENT_BOTTOM);
  const gap = OUTER_GAP;
  const half = Math.floor((w - gap) / 2);
  const leftCol = { x: 0, y: contentY, w: Math.max(0, half), h: contentH };
  const rightCol = { x: Math.max(0, half + gap), y: contentY, w: Math.max(0, w - (half + gap)), h: contentH };
  const leftRows = splitRectToRows(leftCol);
  const rightRows = splitRectToRows(rightCol);
  resizeChild(null, { x: 0, y: 0, w: leftRows.top.w, h: leftRows.top.h }, state.tl);
  resizeChild(null, { x: 0, y: 0, w: rightRows.top.w, h: rightRows.top.h }, state.tr);
  resizeChild(null, { x: 0, y: 0, w: leftRows.bottom.w, h: leftRows.bottom.h }, state.bl);
  resizeChild(null, { x: 0, y: 0, w: rightRows.bottom.w, h: rightRows.bottom.h }, state.br);
  resizeChild(null, { x: 0, y: 0, w, h }, state.popup);
}

export async function render(env, state) {
  const { ctx: g, rect, config: CONFIG } = env;
  const contentY = CONTENT_TOP;
  const contentH = Math.max(0, rect.h - CONTENT_TOP - CONTENT_BOTTOM);
  const popupCfg = env?.quadPopup;
  const popupWanted = popupCfg && popupCfg.open ? sanitizeChildId(popupCfg.viewId, 'none') : 'none';

  // Popup-Modus: rendere die View in Originalgröße (vollflächig),
  // ohne Quad-Hintergrund/Layout. So sieht es exakt wie die Einzel-View aus.
  if (popupWanted !== 'none' && state) {
    if (state.lastPopupId !== popupWanted) {
      destroyChild(state.popup);
      state.popup = initChild(env, popupWanted);
      state.lastPopupId = popupWanted;
      resizeChild(null, { x: 0, y: 0, w: rect.w, h: rect.h }, state.popup);
    }

    state._quadHit = {
      contentY: 0,
      quadrants: [],
      meters: [],
      popupBox: { x: 0, y: 0, w: rect.w, h: rect.h },
    };

    const mod = CHILD_VIEWS[state.popup.id];
    if (mod && typeof mod.render === 'function') {
      const subEnv = Object.assign({}, env, {
        rect: { x: 0, y: 0, w: rect.w, h: rect.h },
        embedded: false,
      });
      await mod.render(subEnv, state.popup.state);
    }
    return;
  }

  if (state && state.lastPopupId !== 'none') {
    destroyChild(state.popup);
    state.popup = initChild(env, 'none');
    state.lastPopupId = 'none';
  }

  const desiredTlId = sanitizePlotId(CONFIG?.QUAD_VIEW_TL, 'phase-wheel');
  const desiredTrId = sanitizePlotId(CONFIG?.QUAD_VIEW_TR, 'realtime');
  const desiredBlId = sanitizePlotId(CONFIG?.QUAD_VIEW_BL, 'goniometer-rtw');
  const desiredBrId = sanitizePlotId(CONFIG?.QUAD_VIEW_BR, 'none');

  if (state.lastTlId !== desiredTlId) {
    destroyChild(state.tl);
    state.tl = initChild(env, desiredTlId);
    state.lastTlId = desiredTlId;
  }
  if (state.lastTrId !== desiredTrId) {
    destroyChild(state.tr);
    state.tr = initChild(env, desiredTrId);
    state.lastTrId = desiredTrId;
  }
  if (state.lastBlId !== desiredBlId) {
    destroyChild(state.bl);
    state.bl = initChild(env, desiredBlId);
    state.lastBlId = desiredBlId;
  }
  if (state.lastBrId !== desiredBrId) {
    destroyChild(state.br);
    state.br = initChild(env, desiredBrId);
    state.lastBrId = desiredBrId;
  }

  const slots = readQuadMeters(CONFIG);
  const layout = computeBaseLayout(rect, slots);
  const leftColRaw = layout?.plots?.left || { x: 0, y: 0, w: Math.floor(rect.w / 2), h: rect.h };
  const rightColRaw = layout?.plots?.right || { x: Math.floor(rect.w / 2), y: 0, w: rect.w - Math.floor(rect.w / 2), h: rect.h };
  const leftCol = { x: leftColRaw.x, y: contentY, w: leftColRaw.w, h: contentH };
  const rightCol = { x: rightColRaw.x, y: contentY, w: rightColRaw.w, h: contentH };
  const leftRows = splitRectToRows(leftCol);
  const rightRows = splitRectToRows(rightCol);

  const canRowMerge = !layout?.meters?.center;
  const topLeftActive = desiredTlId !== 'none';
  const topRightActive = desiredTrId !== 'none';
  const bottomLeftActive = desiredBlId !== 'none';
  const bottomRightActive = desiredBrId !== 'none';

  let tlRect = { ...leftRows.top };
  let trRect = { ...rightRows.top };
  let blRect = { ...leftRows.bottom };
  let brRect = { ...rightRows.bottom };

  if (canRowMerge) {
    if (topLeftActive && !topRightActive) {
      tlRect = unionRectHoriz(tlRect, trRect);
      trRect = null;
    } else if (!topLeftActive && topRightActive) {
      trRect = unionRectHoriz(tlRect, trRect);
      tlRect = null;
    }

    if (bottomLeftActive && !bottomRightActive) {
      blRect = unionRectHoriz(blRect, brRect);
      brRect = null;
    } else if (!bottomLeftActive && bottomRightActive) {
      brRect = unionRectHoriz(blRect, brRect);
      blRect = null;
    }
  }

  if (state) {
    state._quadHit = {
      contentY,
      quadrants: [
        { key: 'tl', rect: tlRect, viewId: desiredTlId },
        { key: 'tr', rect: trRect, viewId: desiredTrId },
        { key: 'bl', rect: blRect, viewId: desiredBlId },
        { key: 'br', rect: brRect, viewId: desiredBrId },
      ],
      meters: [layout?.meters?.left, layout?.meters?.center, layout?.meters?.right].filter(Boolean).map((r) => ({ ...r })),
      popupBox: null,
    };
  }

  if (tlRect) {
    if (state.tl?.id === 'none') drawEmptyPlot(state, g, tlRect, 'OL: (leer)');
    else {
      ensureChildRectSize(null, tlRect, state.tl);
      await renderChild(env, tlRect, state.tl, { topInset: 0 });
    }
  }
  if (trRect) {
    if (state.tr?.id === 'none') drawEmptyPlot(state, g, trRect, 'OR: (leer)');
    else {
      ensureChildRectSize(null, trRect, state.tr);
      await renderChild(env, trRect, state.tr, { topInset: 0 });
    }
  }
  if (blRect) {
    if (state.bl?.id === 'none') drawEmptyPlot(state, g, blRect, 'UL: (leer)');
    else {
      ensureChildRectSize(null, blRect, state.bl);
      await renderChild(env, blRect, state.bl, { topInset: 0 });
    }
  }
  if (brRect) {
    if (state.br?.id === 'none') drawEmptyPlot(state, g, brRect, 'UR: (leer)');
    else {
      ensureChildRectSize(null, brRect, state.br);
      await renderChild(env, brRect, state.br, { topInset: 0 });
    }
  }

  if (layout?.meters?.left) await drawMetersPanel(env, state, layout.meters.left, layout.meterIds.left, layout.slotW);
  if (layout?.meters?.center) await drawMetersPanel(env, state, layout.meters.center, layout.meterIds.center, layout.slotW);
  if (layout?.meters?.right) await drawMetersPanel(env, state, layout.meters.right, layout.meterIds.right, layout.slotW);
}