import Phaser from '../vendor/phaser.js';
import { config } from '../config/Config.js';
import { toColor, toCss } from '../utils/Color.js';
import { fontStack, themeColor } from '../utils/Theme.js';
import { canvasTexture } from '../utils/Textures.js';
import { CyberShape } from './CyberShape.js';

const FONT_FALLBACK = "'Segoe UI', 'Helvetica Neue', Arial, sans-serif";

/**
 * COMMAND DECK — the cyberpunk action bar across the bottom of the screen:
 * a cut-corner console panel with an energy rail, six evenly spaced slot
 * buttons (label-only, per-slot accent rail on top, RGB-split labels),
 * reserved "standby" slots, a rail comet that streaks past on a loop, periodic glitch
 * bursts (slice bars + label jitter), and a boot flicker-in.
 * Dressed with the menu's CRT language: scanlines over the whole bar (the
 * same 1px-dark-row tile as CyberOverlay) and the GlitchText RGB pull-apart
 * on labels and the panel outline itself on bursts.
 *
 * Everything is procedural — no image assets — and fully config-driven
 * (data/actionbar.json): slots, labels, accents, palette, and every
 * animation's tuning.
 *
 * Component usage (scenes own one instance, like CyberOverlay):
 *
 *   this.actionBar = new ActionBar(this, { onAction: (id) => ... });
 *   update(time, delta) { this.actionBar.update(time, delta); }
 *   shutdown()          { this.actionBar.destroy(); }
 *
 * Live slots fire `onAction(id, slot)` on press — behavior is the
 * scene's job (the Research/Build/Ship/Menu panels come next).
 * `bar.contains(px, py)` (screen coords) lets a scene keep its own
 * input — e.g. click-to-fly — from triggering over the deck.
 */
export class ActionBar extends Phaser.GameObjects.Container {
  /**
   * @param {Phaser.Scene} scene
   * @param {object} [o] { onAction?(id, slot) }
   */
  constructor(scene, o = {}) {
    super(scene, 0, 0);
    // v4 quirk: a directly-constructed GameObject is NOT added to the scene's
    // display list (the scene.add.* factories do that) — register it here or it
    // never renders. Verified Sept 2026 against lib/phaser.min.js (4.2.1 Giedi).
    this.scene.add.existing(this);
    this.setScrollFactor(0); // UI — pinned to the screen, not the world
    this.setDepth(50); // above the HUD dossier (30) / compass (40) / toast (45)

    const ab = config.section('actionbar', {});
    this.dead = false;
    this.onAction = typeof o.onAction === 'function' ? o.onAction : null;

    const { width: W, height: H } = scene.scale;
    const mL = ab.margin?.left ?? 20;
    const mR = ab.margin?.right ?? 20;
    const mB = ab.margin?.bottom ?? 12;
    const barW = W - mL - mR;
    const barH = ab.height ?? 92;
    const x0 = mL;
    const y0 = H - mB - barH;
    this.rect = { x: x0, y: y0, w: barW, h: barH, cx: W / 2, cy: y0 + barH / 2 };

    const bc = ab.button ?? {};
    const anim = ab.animation ?? {};
    this.style = {
      bw: 0, bh: 0, notch: 10,
      slotBg: toColor(ab.colors?.slotBg, 0x0b1322),
      slotBorder: toColor(ab.colors?.slotBorder, 0x22405f),
      reserved: toColor(ab.colors?.reserved, 0x3d4c74),
      inkCss: toCss(ab.colors?.text ?? '#eaf6ff'),
      labelY: 0, // label-only buttons: the text is centred vertically
    };
    // The menu's CRT scanline tuning (data/theme.json) is the default, so
    // the bar matches the menu unless actionbar.json overrides it.
    const themeScan = config.section('theme.overlay', {}).scanline ?? {};
    this.cfgScan = { pitch: 3, alpha: 0.14, ...themeScan, ...(ab.scanline ?? {}) };
    // RGB pull-apart (the GlitchText motion model, scaled to button size):
    // idleOffset px of constant chromatic fringe, burstOffset extra px at
    // level 1, plus the ghost alphas.
    this.cfgRgb = {
      idleOffset: 1.8,
      burstOffset: 6,
      idleAlpha: 0.4,
      burstAlpha: 0.55,
      ...(anim.rgb ?? {}),
    };
    this.cfgComet = { enabled: true, everyMs: [3600, 7800], durationMs: 950, ...(anim.comet ?? {}) };
    this.cfgGlitch = {
      enabled: true,
      intervalMs: [3500, 9000],
      durationMs: [240, 480],
      slices: [3, 6],
      ...(anim.glitch ?? {}),
    };
    this.bootStagger = anim.bootStagger ?? 70;

    this.railTop = null;
    this.railBottom = null;
    this.comet = null;
    this.cometT0 = null;
    this.cometDur = 1;
    this.nextCometAt = null;
    this.level = 0; // RGB-split level 0..1 (GlitchText model, decays ~90 ms)
    this.burstT0 = null;
    this.burstDur = 1;
    this.nextBurstAt = null;
    this.slices = [];
    this.lastTime = null;

    this.buildBody(barW, barH);
    this.buildRails();
    this.buildSlots(ab, bc, x0, y0, barW, barH);
    this.buildFx(barW, barH); // scanlines + panel RGB ghost (topmost of the bar)
    this.boot();
  }

  // ------------------------------------------------------------------
  // Building the bar
  // ------------------------------------------------------------------

  /** The console panel — a canvas texture (gradients + neon halo that
   *  Graphics can't do), drawn exactly over `rect` with bleed for glow. */
  buildBody(barW, barH) {
    const { scene } = this;
    const P = 24; // halo bleed around the panel
    const W = barW + P * 2;
    const H = barH + P * 2;
    const c = config.section('actionbar.colors', {});
    const key = canvasTexture(scene, `__ab_body_${W}x${H}`, W, H, (ctx) =>
      drawBarBody(ctx, W, H, P, {
        panelTop: c.panelTop ?? '#101c36',
        panelBottom: c.panelBottom ?? '#04070e',
        hatch: c.hatch ?? '#78b4ff',
      }),
    );
    this.body = scene.add.image(this.rect.cx, this.rect.cy, key).setScrollFactor(0);
    this.add(this.body);
  }

  /** Breathing energy lines: the top rail (cyan) and floor line (magenta). */
  buildRails() {
    const { scene } = this;
    const { x, y, w, h } = this.rect;
    const rail = toColor(config.get('actionbar.colors.rail'), 0x00e5ff);
    const railBottom = toColor(config.get('actionbar.colors.railBottom'), 0xff2d6f);

    this.railTop = scene
      .add.rectangle(x + w / 2, y + 1, w, 2, rail, 0.2)
      .setOrigin(0.5)
      .setScrollFactor(0)
      .setBlendMode(Phaser.BlendModes.ADD);
    this.add(this.railTop);

    this.railBottom = scene
      .add.rectangle(x + w / 2, y + h - 1, w, 1.5, railBottom, 0.12)
      .setOrigin(0.5)
      .setScrollFactor(0)
      .setBlendMode(Phaser.BlendModes.ADD);
    this.add(this.railBottom);

    // The rail comet — a bright streak that crosses the top edge on a loop.
    const cometKey = canvasTexture(scene, '__ab_comet', 180, 12, (ctx) => {
      const g = ctx.createLinearGradient(0, 0, 180, 0);
      g.addColorStop(0, 'rgba(0,229,255,0)');
      g.addColorStop(0.42, 'rgba(0,229,255,0.55)');
      g.addColorStop(0.5, 'rgba(228,255,255,0.95)');
      g.addColorStop(0.58, 'rgba(0,229,255,0.55)');
      g.addColorStop(1, 'rgba(0,229,255,0)');
      ctx.fillStyle = g;
      ctx.fillRect(0, 0, 180, 12);
    });
    this.comet = scene
      .add.image(x - 120, y + 1, cometKey)
      .setOrigin(0.5)
      .setScrollFactor(0)
      .setBlendMode(Phaser.BlendModes.ADD)
      .setAlpha(0)
      .setDisplaySize(190, 7);
    this.add(this.comet);
  }

  /** The six slots — buttons and reserved placeholders, evenly spaced. */
  buildSlots(ab, bc, x0, y0, barW, barH) {
    const { scene } = this;
    const pad = ab.padding ?? 16;
    const buttons =
      Array.isArray(ab.buttons) && ab.buttons.length > 0
        ? ab.buttons
        : [
            { id: 'research', label: 'Research', accent: '#00e5ff' },
            { id: 'build', label: 'Build', accent: '#ffc94d' },
            { id: 'ship', label: 'Ship', accent: '#7ce8a4' },
            { id: null, label: null },
            { id: null, label: null },
            { id: 'menu', label: 'Menu', accent: '#ff2d6f' },
          ];

    const n = buttons.length;
    const slotW = (barW - pad * 2) / n;
    const bw = Math.min(slotW * (bc.widthFactor ?? 0.72), bc.maxWidth ?? 190);
    const bh = barH - 26;
    const notch = Math.min(bc.notch ?? 10, bh * 0.3);
    this.style.bw = bw;
    this.style.bh = bh;
    this.style.notch = notch;

    const fam = fontStack('header', FONT_FALLBACK);
    const fontSize = bc.fontSize ?? 14;
    const letterSpacing = bc.letterSpacing ?? 2.5;
    const cyan = toCss('#00e5ff');
    const magenta = toCss('#ff2d6f');

    this.slots = buttons.map((b, i) => {
      const live = typeof b.id === 'string' && b.id.length > 0;
      const sx = x0 + pad + slotW * (i + 0.5);
      const sy = y0 + barH / 2;

      const slot = new Phaser.GameObjects.Container(scene, sx, sy);
      // v4 quirk (Sept 2026): hit-testing uses EACH object's own scrollFactor
      // (InputManager: `g = worldX + scrollX*sf - scrollX`) while rendering pins
      // children to their scrollFactor-0 container — so every child of a
      // screen-fixed container must set its own scrollFactor(0) or its input
      // lands in world space. (MenuButton got away with the default only
      // because the menu camera never scrolls.)
      slot.setScrollFactor(0);
      this.add(slot);

      const s = {
        id: live ? b.id : null,
        live,
        slot,
        accent: toColor(b.accent ?? themeColor('neon', 0x00e5ff)),
        hoverOn: false,
        pressing: false,
        phase: i * 1.7 + 0.6, // per-slot shimmer offset
        label: null,
        resDot: null,
        _sweep: null,
        _scaleTw: null,
      };
      s.panel = scene.add.graphics().setScrollFactor(0);
      slot.add(s.panel);

      if (live) {
        const labelText = String(b.label ?? '').toUpperCase();
        const textStyle = {
          fontFamily: fam,
          fontSize: `${fontSize}px`,
          // v4 quirk: text colors must be CSS strings (see toCss).
          color: this.style.inkCss,
          letterSpacing,
        };
        s.label = scene.add.text(0, this.style.labelY, labelText, textStyle).setOrigin(0.5).setScrollFactor(0);
        // RGB-split ghosts (additive), revealed on hover + glitch bursts.
        s.ghostCyan = scene
          .add.text(0, this.style.labelY, labelText, { ...textStyle, color: cyan })
          .setOrigin(0.5)
          .setAlpha(0)
          .setBlendMode(Phaser.BlendModes.ADD)
          .setScrollFactor(0);
        s.ghostMagenta = scene
          .add.text(0, this.style.labelY, labelText, { ...textStyle, color: magenta })
          .setOrigin(0.5)
          .setAlpha(0)
          .setBlendMode(Phaser.BlendModes.ADD)
          .setScrollFactor(0);
        // Light streak for the hover sweep.
        s.sweep = scene
          .add.rectangle(0, 0, 20, bh - 10, 0xeaf6ff, 0)
          .setOrigin(0.5)
          .setBlendMode(Phaser.BlendModes.ADD)
          .setScrollFactor(0);
        slot.add([s.ghostCyan, s.ghostMagenta, s.sweep, s.label]);

        // Hit-test the whole slot rect with an explicit area (independent
        // of the Graphics' draw state, so repainting never breaks input).
        s.panel.setInteractive({
          useHandCursor: true,
          hitArea: new Phaser.Geom.Rectangle(-bw / 2, -bh / 2, bw, bh),
          hitAreaCallback: (p, px, py) => Phaser.Geom.Rectangle.Contains(p, px, py),
        });
        s.panel.on('pointerover', () => this.setHover(s, true));
        s.panel.on('pointerout', () => this.setHover(s, false));
        s.panel.on('pointerdown', () => this.press(s));
      } else {
        // Reserved socket: a standby dot (centred) that breathes in update().
        s.resDot = scene.add.circle(0, 0, 1.6, this.style.reserved, 0.35).setScrollFactor(0);
        slot.add(s.resDot);
      }

      this.paintSlot(s, 'base');
      return s;
    });
  }

  /**
   * The menu's CRT dressing, clipped to the bar: scanlines over the whole
   * strip (body + buttons) and the panel RGB ghost — the cut-corner outline
   * pulled apart in magenta/cyan while a glitch burst is live (the
   * GlitchText technique applied to the bar itself).
   */
  buildFx(barW, barH) {
    const { scene } = this;
    const { x, y, w, h, cx, cy } = this.rect;

    // Scanlines — the exact recipe CyberOverlay uses on the menu (one dark
    // row per `pitch` rows, tiled), sized to the bar strip.
    const sl = this.cfgScan;
    const pitch = Math.max(2, Math.round(sl.pitch));
    const scanKey = `__ab_scan_${pitch}`;
    canvasTexture(scene, scanKey, 1, pitch, (ctx) => {
      ctx.fillStyle = 'rgba(0,0,0,0.5)';
      ctx.fillRect(0, pitch - 1, 1, 1); // one dark line every `pitch` rows
    });
    this.scanlines = scene
      .add.tileSprite(cx, cy, w, h, scanKey)
      .setScrollFactor(0)
      .setAlpha(sl.alpha);
    this.add(this.scanlines);

    // Panel RGB ghost — same cut corners as the body (drawBarBody uses
    // min(14, h*0.16)), stroke-only, additive; driven in update().
    const cut = Math.max(4, Math.min(14, Math.round(barH * 0.16)));
    this.ghostPanelM = scene.add.graphics().setScrollFactor(0).setBlendMode(Phaser.BlendModes.ADD).setAlpha(0);
    CyberShape.draw(this.ghostPanelM, barW, barH, { notch: cut, stroke: 0xff2d6f, strokeAlpha: 1, lineWidth: 1.5 });
    this.ghostPanelC = scene.add.graphics().setScrollFactor(0).setBlendMode(Phaser.BlendModes.ADD).setAlpha(0);
    CyberShape.draw(this.ghostPanelC, barW, barH, { notch: cut, stroke: 0x00e5ff, strokeAlpha: 1, lineWidth: 1.5 });
    this.add(this.ghostPanelM);
    this.add(this.ghostPanelC);
  }

  // ------------------------------------------------------------------
  // Slot states
  // ------------------------------------------------------------------

  /** Repaint a slot for a visual state: 'base' | 'hover' | 'press'. */
  paintSlot(s, state) {
    const st = this.style;
    const { bw, bh, notch } = st;
    const g = s.panel;
    const hover = state === 'hover';
    g.clear();
    if (state === 'press') {
      CyberShape.draw(g, bw, bh, {
        notch,
        fill: 0xdff6ff,
        fillAlpha: 0.95,
        stroke: 0xffffff,
        strokeAlpha: 1,
        lineWidth: 1.5,
      });
    } else if (s.live) {
      CyberShape.draw(g, bw, bh, {
        notch,
        fill: hover ? mixColor(st.slotBg, s.accent, 0.16) : st.slotBg,
        fillAlpha: hover ? 0.94 : 0.8,
        stroke: hover ? s.accent : st.slotBorder,
        strokeAlpha: hover ? 1 : 0.9,
        lineWidth: 1.5,
        glow: hover ? s.accent : undefined,
        glowAlpha: 0.3,
      });
      // Accent rail along the slot's top edge + a port diamond on it.
      g.fillStyle(s.accent, hover ? 1 : 0.55);
      g.fillRect(-bw / 2 + notch, -bh / 2 + 1.5, bw - notch * 2, 2);
      g.fillPoints(
        [
          { x: 0, y: -bh / 2 - 3.5 },
          { x: 4, y: -bh / 2 },
          { x: 0, y: -bh / 2 + 3.5 },
          { x: -4, y: -bh / 2 },
        ],
        true,
      );
    } else {
      // Reserved socket — dim, inert, clearly "not built yet".
      CyberShape.draw(g, bw, bh, {
        notch,
        fill: st.slotBg,
        fillAlpha: 0.5,
        stroke: st.slotBorder,
        strokeAlpha: 0.4,
        lineWidth: 1.5,
      });
      g.fillStyle(st.reserved, 0.3);
      g.fillRect(-bw / 2 + notch, -bh / 2 + 1.5, bw - notch * 2, 1.5);
    }
    if (s.label) s.label.setColor(state === 'hover' ? '#ffffff' : st.inkCss);
  }

  setHover(s, on) {
    if (!s.live || this.dead) return;
    s.hoverOn = on;
    this.paintSlot(s, on ? 'hover' : 'base');

    if (s._sweep) {
      s._sweep.remove();
      s._sweep = null;
    }
    if (s._scaleTw) s._scaleTw.stop();
    s._scaleTw = this.scene.tweens.add({
      targets: s.slot,
      scale: on ? 1.02 : 1,
      duration: 150,
      ease: 'Sine.easeOut',
    });

    if (on) {
      const half = this.style.bw / 2 - 14;
      s.sweep.setX(-half).setAlpha(0.5);
      s._sweep = this.scene.tweens.add({
        targets: s.sweep,
        x: half,
        duration: 380,
        ease: 'Sine.easeOut',
        onComplete: () => s.sweep.setAlpha(0),
      });
    } else {
      s.sweep.setAlpha(0);
    }
  }

  /** Click feedback: white flash + scale punch, then restore. Fires onAction. */
  press(s) {
    if (!s.live || s.pressing || this.dead) return;
    s.pressing = true;
    this.paintSlot(s, 'press');
    this.scene.tweens.add({
      targets: s.slot,
      scale: 0.96,
      duration: 70,
      yoyo: true,
      ease: 'Sine.easeOut',
    });
    this.scene.time.delayedCall(130, () => {
      if (this.dead) return;
      s.pressing = false;
      this.paintSlot(s, s.hoverOn ? 'hover' : 'base');
    });
    if (typeof this.onAction === 'function') {
      try {
        this.onAction(s.id, s);
      } catch (err) {
        console.error('[actionbar] onAction handler failed', err);
      }
    }
  }

  // ------------------------------------------------------------------
  // Boot
  // ------------------------------------------------------------------

  /** The deck flickers up: panel fades in, slots chunk-flicker one by
   *  one (Steps ease), then a signature glitch burst + rail comet. */
  boot() {
    const scene = this.scene;
    this.setAlpha(0);
    scene.tweens.add({ targets: this, alpha: 1, duration: 360, delay: 240, ease: 'Sine.easeOut' });
    this.slots.forEach((s, i) => {
      s.slot.setAlpha(0);
      scene.tweens.add({
        targets: s.slot,
        alpha: 1,
        duration: 260,
        delay: 480 + i * this.bootStagger,
        ease: 'Steps(4)',
      });
    });
    const bootEnd = 480 + this.slots.length * this.bootStagger + 300;
    scene.time.delayedCall(bootEnd, () => {
      if (this.dead) return;
      this.triggerBurst(340, 1);
      this.fireComet(620);
    });
  }

  // ------------------------------------------------------------------
  // Glitch + comet
  // ------------------------------------------------------------------

  /**
   * Fire a glitch burst right now: slice bars across the deck, and the RGB
   * split (level → 1, decays in update) on labels and the panel.
   */
  triggerBurst(duration = 300, intensity = 1) {
    const now = this.lastTime ?? this.scene.time.now;
    this.burstT0 = now;
    this.burstDur = Math.max(1, duration);
    this.level = Math.max(this.level, intensity);
    this.spawnSlices();
  }

  /** Start a rail-comet pass right now. */
  fireComet(duration = 700) {
    this.cometT0 = this.lastTime ?? this.scene.time.now;
    this.cometDur = Math.max(1, duration);
  }

  /**
   * Slice bars + a displacement band, clipped to the deck's strip —
   * the same signal-loss language as CyberOverlay, at bar scale.
   */
  spawnSlices() {
    const { x, y, w, h } = this.rect;
    const neon = toColor(config.get('actionbar.colors.rail'), 0x00e5ff);
    const mag = toColor(config.get('actionbar.colors.railBottom'), 0xff2d6f);
    const bars = this.scene.add.graphics().setScrollFactor(0).setDepth(52);
    const n = Math.round(this.range(this.cfgGlitch.slices[0] ?? 3, this.cfgGlitch.slices[1] ?? 6));
    const palette = [neon, mag, 0xeaf6ff, 0x04060d];
    for (let i = 0; i < n; i++) {
      const yy = y + Math.random() * h;
      const bh2 = 1 + Math.random() * 9;
      const dx = (Math.random() * 2 - 1) * 12;
      bars.fillStyle(palette[(Math.random() * palette.length) | 0], 0.07 + Math.random() * 0.16);
      bars.fillRect(x + dx - 20, yy, w + 40, bh2);
    }
    // One wider "displacement band" so the burst reads at a glance.
    const bandY = y + Math.random() * Math.max(4, h - 18);
    bars.fillStyle(0x04060d, 0.5);
    bars.fillRect(x - 24, bandY, w + 48, 10 + Math.random() * 10);
    bars.fillStyle(neon, 0.25);
    bars.fillRect(x - 24, bandY - 2, w + 48, 1.5);

    const die = (this.lastTime ?? this.scene.time.now) + (this.burstDur ?? 300) + 80;
    this.slices.push({ g: bars, die });
  }

  // ------------------------------------------------------------------
  // Per-frame
  // ------------------------------------------------------------------

  /**
   * Drive the living details: rail breathing, rail comet, glitch-burst
   * scheduling, slot shimmer/jitter, and slice reaping.
   * The scene calls this once per frame (Phaser v4 does not auto-update).
   */
  update(time, delta) {
    if (this.dead) return;
    this.lastTime = time;
    const t = time * 0.001;
    const { x, y, w } = this.rect;

    // Rail breathing — the console idles like it's alive.
    if (this.railTop) this.railTop.setAlpha(0.14 + 0.1 * Math.sin(t * 0.9));
    if (this.railBottom) this.railBottom.setAlpha(0.09 + 0.07 * Math.sin(t * 0.9 + Math.PI));

    // Rail comet: scheduled passes with smooth travel.
    if (this.cfgComet.enabled && this.comet) {
      if (this.nextCometAt === null) this.nextCometAt = time + 2600;
      if (this.cometT0 === null && time >= this.nextCometAt) {
        this.cometT0 = time;
        this.cometDur = this.cfgComet.durationMs ?? 950;
      }
      if (this.cometT0 !== null) {
        const u = (time - this.cometT0) / this.cometDur;
        if (u >= 1) {
          this.cometT0 = null;
          this.nextCometAt = time + this.range(this.cfgComet.everyMs[0], this.cfgComet.everyMs[1]);
          this.comet.setAlpha(0);
        } else {
          const e = u * u * (3 - 2 * u); // smoothstep
          this.comet
            .setX(x - 120 + (w + 240) * e)
            .setAlpha(Math.sin(Math.PI * Math.min(1, Math.max(0, u))) * 0.85);
        }
      }
    }

    // Glitch bursts: schedule → fire (level decays) → schedule again.
    if (this.cfgGlitch.enabled) {
      if (this.nextBurstAt === null) {
        // First scheduled burst lands after the boot burst has faded.
        this.nextBurstAt = time + 4200 + Math.random() * 1800;
      }
      if (this.burstT0 === null && time >= this.nextBurstAt) {
        this.burstT0 = time;
        this.burstDur = this.range(this.cfgGlitch.durationMs[0], this.cfgGlitch.durationMs[1]);
        this.nextBurstAt = time + this.burstDur + this.range(this.cfgGlitch.intervalMs[0], this.cfgGlitch.intervalMs[1]);
        this.spawnSlices();
      }
      if (this.burstT0 !== null && time - this.burstT0 >= this.burstDur) this.burstT0 = null;
    }
    // RGB-split level: pushed to 1 on burst trigger, decays ~90 ms — the
    // GlitchText model (fast snap, while the slice bars linger longer).
    this.level *= Math.exp(-(delta / 90));
    if (this.level < 0.002) this.level = 0;
    const L = this.level;
    const rgb = this.cfgRgb;
    const idle = 0.65 + 0.35 * Math.sin(t * 1.9);
    const off = rgb.idleOffset * idle + L * rgb.burstOffset;
    const flick = 0.6 + 0.4 * Math.sin(t * 3.3);
    const baseA = Math.min(1, rgb.idleAlpha * flick + L * rgb.burstAlpha);

    // Slots: the menu's RGB pull-apart on the label — magenta left,
    // cyan right (GlitchText's exact offsets), always a faint fringe at
    // idle, pulled apart + jittered during bursts; per-slot phase so the
    // six buttons don't shimmer in lockstep.
    for (const s of this.slots) {
      if (!s.live) {
        if (s.resDot) {
          s.resDot.setAlpha(0.2 + 0.18 * (0.5 + 0.5 * Math.sin(t * 1.4 + s.phase)));
        }
        continue;
      }
      const jx = L * 6 * Math.sin(time * 0.053 + s.phase * 3.1) * Math.sin(time * 0.021 + 1.7 + s.phase);
      const jy = L * 4 * Math.sin(time * 0.083 + 0.4 + s.phase * 2.3);
      const a = s.hoverOn ? Math.min(1, baseA + 0.25) : baseA;
      s.ghostMagenta.setAlpha(a).setPosition(-off + jx, this.style.labelY + jy * 0.5);
      s.ghostCyan.setAlpha(a * 0.95).setPosition(off * 0.85, this.style.labelY - off * 0.3 + jy);
    }

    // The bar itself: the panel outline pulled apart in magenta/cyan while
    // the burst is live — the RGB separation on the bar, not just the text.
    if (L > 0.02) {
      const po = 2 + L * 5;
      this.ghostPanelM.setAlpha(L * 0.5).setPosition(-po, L * 1.5);
      this.ghostPanelC.setAlpha(L * 0.45).setPosition(po * 0.85, -po * 0.3);
    } else {
      this.ghostPanelM.setAlpha(0);
      this.ghostPanelC.setAlpha(0);
    }

    // Reap expired slice bars.
    if (this.slices.length > 0) {
      this.slices = this.slices.filter((sl) => {
        if (time >= sl.die) {
          sl.g.destroy();
          return false;
        }
        return true;
      });
    }
  }

  /** Is (px, py) — screen coords — over the deck's strip? */
  contains(px, py) {
    const { x, y, w, h } = this.rect;
    return px >= x && px <= x + w && py >= y && py <= y + h;
  }

  destroy() {
    if (this.dead) return;
    this.dead = true;
    for (const sl of this.slices) sl.g.destroy();
    this.slices.length = 0;
    super.destroy();
  }

  range(lo, hi) {
    return lo + Math.random() * (hi - lo);
  }
}

// ----------------------------------------------------------------------
// Procedural art (file-local helpers — no state, no scene bookkeeping)
// ----------------------------------------------------------------------

/** Blend two color ints toward each other: mix(0x0b1322, 0x00e5ff, 0.16). */
function mixColor(a, b, t) {
  const r = Math.round(((a >> 16) & 255) + (((b >> 16) & 255) - ((a >> 16) & 255)) * t);
  const g = Math.round(((a >> 8) & 255) + (((b >> 8) & 255) - ((a >> 8) & 255)) * t);
  const bl = Math.round((a & 255) + ((b & 255) - (a & 255)) * t);
  return (r << 16) | (g << 8) | bl;
}

/** '#rrggbb' → 'rgba(r,g,b,a)' for canvas 2D fills. */
function hexA(hex, a) {
  const n = toColor(hex);
  return `rgba(${(n >> 16) & 255},${(n >> 8) & 255},${n & 255},${a})`;
}

/**
 * The console panel, drawn into a canvas (P = halo bleed around the
 * panel rect): neon halo, gradient body, clipped inner detail (top
 * energy glow, hatch texture, vignette), a cyan→magenta energy rail on
 * the top edge, ruler ticks, and viewfinder corner brackets.
 */
function drawBarBody(ctx, W, H, P, c) {
  const w = W - P * 2;
  const h = H - P * 2;
  const x = P;
  const y = P;
  const cut = Math.max(4, Math.min(14, Math.round(h * 0.16)));

  const panel = new Path2D();
  panel.moveTo(x + cut, y);
  panel.lineTo(x + w - cut, y);
  panel.lineTo(x + w, y + cut);
  panel.lineTo(x + w, y + h - cut);
  panel.lineTo(x + w - cut, y + h);
  panel.lineTo(x + cut, y + h);
  panel.lineTo(x, y + h - cut);
  panel.lineTo(x, y + cut);
  panel.closePath();

  // 1) Outer halo — cyan light above, magenta light below (the console
  //    is backlit). A translucent fill + shadowBlur is the glow pass.
  ctx.save();
  ctx.shadowColor = 'rgba(0,229,255,0.45)';
  ctx.shadowBlur = 18;
  ctx.shadowOffsetY = -3;
  ctx.fillStyle = 'rgba(0,229,255,0.05)';
  ctx.fill(panel);
  ctx.restore();

  ctx.save();
  ctx.shadowColor = 'rgba(255,45,111,0.35)';
  ctx.shadowBlur = 16;
  ctx.shadowOffsetY = 5;
  ctx.fillStyle = 'rgba(255,45,111,0.04)';
  ctx.fill(panel);
  ctx.restore();

  // 2) Body — deep console blue fading to near-black toward the floor.
  const body = ctx.createLinearGradient(0, y, 0, y + h);
  body.addColorStop(0, c.panelTop);
  body.addColorStop(0.45, '#0a1326');
  body.addColorStop(1, c.panelBottom);
  ctx.fillStyle = body;
  ctx.fill(panel);

  // 3) Inner detail, clipped to the panel.
  ctx.save();
  ctx.clip(panel);

  // Top energy glow bleeding down from the rail.
  const topGlow = ctx.createLinearGradient(0, y, 0, y + 18);
  topGlow.addColorStop(0, 'rgba(0,229,255,0.26)');
  topGlow.addColorStop(1, 'rgba(0,229,255,0)');
  ctx.fillStyle = topGlow;
  ctx.fillRect(x, y, w, 18);

  // Side glows — cyan toward the left edge, magenta toward the right.
  const leftGlow = ctx.createLinearGradient(x, 0, x + 46, 0);
  leftGlow.addColorStop(0, 'rgba(0,229,255,0.09)');
  leftGlow.addColorStop(1, 'rgba(0,229,255,0)');
  ctx.fillStyle = leftGlow;
  ctx.fillRect(x, y, 46, h);

  const rightGlow = ctx.createLinearGradient(x + w - 46, 0, x + w, 0);
  rightGlow.addColorStop(0, 'rgba(255,45,111,0)');
  rightGlow.addColorStop(1, 'rgba(255,45,111,0.11)');
  ctx.fillStyle = rightGlow;
  ctx.fillRect(x + w - 46, y, 46, h);

  // Bottom inner glow + settle vignette.
  const botGlow = ctx.createLinearGradient(0, y + h - 14, 0, y + h);
  botGlow.addColorStop(0, 'rgba(255,45,111,0)');
  botGlow.addColorStop(1, 'rgba(255,45,111,0.14)');
  ctx.fillStyle = botGlow;
  ctx.fillRect(x, y + h - 14, w, 14);

  const vin = ctx.createLinearGradient(0, y + h * 0.55, 0, y + h);
  vin.addColorStop(0, 'rgba(0,0,0,0)');
  vin.addColorStop(1, 'rgba(0,0,0,0.3)');
  ctx.fillStyle = vin;
  ctx.fillRect(x, y, w, h);

  // Diagonal hatch — faint technical texture across the whole panel.
  ctx.strokeStyle = hexA(c.hatch, 0.05);
  ctx.lineWidth = 1;
  ctx.beginPath();
  for (let i = -h; i < w; i += 18) {
    ctx.moveTo(x + i, y);
    ctx.lineTo(x + i + h, y + h);
  }
  ctx.stroke();

  ctx.restore();

  // 4) The energy rail — cyan→magenta across the top edge (the deck's
  //    signature line), with a fainter magenta floor line below.
  const rail = ctx.createLinearGradient(x, 0, x + w, 0);
  rail.addColorStop(0, 'rgba(0,229,255,0.05)');
  rail.addColorStop(0.12, 'rgba(0,229,255,0.9)');
  rail.addColorStop(0.5, 'rgba(170,255,255,0.95)');
  rail.addColorStop(0.88, 'rgba(255,45,111,0.85)');
  rail.addColorStop(1, 'rgba(255,45,111,0.05)');
  ctx.fillStyle = rail;
  ctx.fillRect(x + cut, y, w - cut * 2, 2);

  ctx.fillStyle = 'rgba(255,45,111,0.3)';
  ctx.fillRect(x + cut, y + h - 1.5, w - cut * 2, 1.5);

  // 5) Ruler ticks just under the rail.
  ctx.fillStyle = 'rgba(0,229,255,0.22)';
  for (let tx = x + 30; tx < x + w - 26; tx += 22) {
    ctx.fillRect(tx, y + 5, 1, 4);
  }

  // 6) Viewfinder corner brackets — HUD chrome on each cut corner.
  ctx.strokeStyle = 'rgba(0,229,255,0.5)';
  ctx.lineWidth = 2;
  const L = 11;
  const corner = (px, py, sx, sy) => {
    ctx.beginPath();
    ctx.moveTo(px + sx * L, py);
    ctx.lineTo(px, py);
    ctx.lineTo(px, py + sy * L);
    ctx.stroke();
  };
  corner(x - 3, y - 3, 1, 1);
  corner(x + w + 3, y - 3, -1, 1);
  corner(x - 3, y + h + 3, 1, -1);
  corner(x + w + 3, y + h + 3, -1, -1);
}