// modules/panels/dual-brain.js — Dual-Brain Status holographic panel
// Shows the Brain Gap Scorecard with two glowing brain orbs.
// Displayed as HONEST-OFFLINE: the dual-brain system is not yet deployed.
// Brain pulse particles are set to ZERO — will flow when system comes online.
//
// Data category: HONEST-OFFLINE
// Data source: — (dual-brain system not deployed; shows "AWAITING DEPLOYMENT")

import * as THREE from 'three';
import { NEXUS } from '../core/theme.js';
import { subscribe } from '../core/ticker.js';

const ORIGIN = new THREE.Vector3(10, 3, -8);
const OFFLINE_COLOR = NEXUS.theme.agentDormantHex; // dim blue — system offline
const ACCENT = NEXUS.theme.accentStr;
const FONT = NEXUS.theme.fontMono;

let _group, _sprite, _scanSprite, _scanCanvas, _scanCtx, _scanTexture;
let _cloudOrb, _localOrb;
let _scene;

function _buildPanelTexture() {
  const W = 512, H = 512;
  const canvas = document.createElement('canvas');
  canvas.width  = W;
  canvas.height = H;
  const ctx = canvas.getContext('2d');

  ctx.fillStyle = NEXUS.theme.panelBg;
  ctx.fillRect(0, 0, W, H);

  ctx.strokeStyle = ACCENT;
  ctx.lineWidth = 2;
  ctx.strokeRect(1, 1, W - 2, H - 2);
  ctx.strokeStyle = '#223366';
  ctx.lineWidth = 1;
  ctx.strokeRect(5, 5, W - 10, H - 10);

  // Title
  ctx.font = `bold 22px ${FONT}`;
  ctx.fillStyle = '#88ccff';
  ctx.textAlign = 'center';
  ctx.fillText('\u25C8 DUAL-BRAIN STATUS', W / 2, 40);

  ctx.strokeStyle = NEXUS.theme.panelBorderFaint;
  ctx.beginPath(); ctx.moveTo(20, 52); ctx.lineTo(W - 20, 52); ctx.stroke();

  // Section header
  ctx.font = `11px ${FONT}`;
  ctx.fillStyle = NEXUS.theme.panelDim;
  ctx.textAlign = 'left';
  ctx.fillText('BRAIN GAP SCORECARD', 20, 74);

  const categories = ['Triage', 'Tool Use', 'Code Gen', 'Planning', 'Communication', 'Reasoning'];
  const barX = 20, barW = W - 130, barH = 20;
  let y = 90;

  for (const cat of categories) {
    ctx.font = `13px ${FONT}`;
    ctx.fillStyle = NEXUS.theme.agentDormant;
    ctx.textAlign = 'left';
    ctx.fillText(cat, barX, y + 14);

    ctx.font = `bold 13px ${FONT}`;
    ctx.fillStyle = NEXUS.theme.panelVeryDim;
    ctx.textAlign = 'right';
    ctx.fillText('\u2014', W - 20, y + 14); // em dash — no data
    y += 22;

    ctx.fillStyle = 'rgba(255, 255, 255, 0.06)';
    ctx.fillRect(barX, y, barW, barH); // empty bar background only
    y += barH + 12;
  }

  ctx.strokeStyle = NEXUS.theme.panelBorderFaint;
  ctx.beginPath(); ctx.moveTo(20, y + 4); ctx.lineTo(W - 20, y + 4); ctx.stroke();
  y += 22;

  // Honest offline status
  ctx.font = `bold 18px ${FONT}`;
  ctx.fillStyle = NEXUS.theme.panelVeryDim;
  ctx.textAlign = 'center';
  ctx.fillText('AWAITING DEPLOYMENT', W / 2, y + 10);

  ctx.font = `11px ${FONT}`;
  ctx.fillStyle = '#223344';
  ctx.fillText('Dual-brain system not yet connected', W / 2, y + 32);

  // Brain indicators — offline dim
  y += 52;
  ctx.beginPath();
  ctx.arc(W / 2 - 60, y + 8, 6, 0, Math.PI * 2);
  ctx.fillStyle = NEXUS.theme.panelVeryDim;
  ctx.fill();
  ctx.font = `11px ${FONT}`;
  ctx.fillStyle = NEXUS.theme.panelVeryDim;
  ctx.textAlign = 'left';
  ctx.fillText('CLOUD', W / 2 - 48, y + 12);

  ctx.beginPath();
  ctx.arc(W / 2 + 30, y + 8, 6, 0, Math.PI * 2);
  ctx.fillStyle = NEXUS.theme.panelVeryDim;
  ctx.fill();
  ctx.fillText('LOCAL', W / 2 + 42, y + 12);

  return new THREE.CanvasTexture(canvas);
}

/** @param {THREE.Scene} scene */
export function init(scene) {
  _scene = scene;

  _group = new THREE.Group();
  _group.position.copy(ORIGIN);
  _group.lookAt(0, 3, 0);
  scene.add(_group);

  // Static panel sprite
  const texture  = _buildPanelTexture();
  const material = new THREE.SpriteMaterial({ map: texture, transparent: true, opacity: 0.92, depthWrite: false });
  _sprite = new THREE.Sprite(material);
  _sprite.scale.set(5.0, 5.0, 1);
  _sprite.userData = { baseY: 0, floatPhase: 0, floatSpeed: 0.22, zoomLabel: 'Dual-Brain Status' };
  _group.add(_sprite);

  // Accent light
  const light = new THREE.PointLight(NEXUS.theme.accent, 0.6, 10);
  light.position.set(0, 0.5, 1);
  _group.add(light);

  // Offline brain orbs — dim
  const orbGeo = new THREE.SphereGeometry(0.35, 32, 32);
  const orbMat = (color) => new THREE.MeshStandardMaterial({
    color, emissive: new THREE.Color(color), emissiveIntensity: 0.1,
    metalness: 0.3, roughness: 0.2, transparent: true, opacity: 0.85,
  });

  _cloudOrb = new THREE.Mesh(orbGeo, orbMat(OFFLINE_COLOR));
  _cloudOrb.position.set(-2.0, 3.0, 0);
  _cloudOrb.userData.zoomLabel = 'Cloud Brain';
  _group.add(_cloudOrb);

  _localOrb = new THREE.Mesh(orbGeo.clone(), orbMat(OFFLINE_COLOR));
  _localOrb.position.set(2.0, 3.0, 0);
  _localOrb.userData.zoomLabel = 'Local Brain';
  _group.add(_localOrb);

  // Brain pulse particles — ZERO count (system offline)
  const particleGeo = new THREE.BufferGeometry();
  particleGeo.setAttribute('position', new THREE.BufferAttribute(new Float32Array(0), 3));
  const particleMat = new THREE.PointsMaterial({
    color: 0x44ddff, size: 0.08, sizeAttenuation: true,
    transparent: true, opacity: 0.8, depthWrite: false,
  });
  _group.add(new THREE.Points(particleGeo, particleMat));

  // Scan line overlay
  _scanCanvas = document.createElement('canvas');
  _scanCanvas.width  = 512;
  _scanCanvas.height = 512;
  _scanCtx    = _scanCanvas.getContext('2d');
  _scanTexture = new THREE.CanvasTexture(_scanCanvas);

  const scanMat = new THREE.SpriteMaterial({
    map: _scanTexture, transparent: true, opacity: 0.18, depthWrite: false,
  });
  _scanSprite = new THREE.Sprite(scanMat);
  _scanSprite.scale.set(5.0, 5.0, 1);
  _scanSprite.position.set(0, 0, 0.01);
  _group.add(_scanSprite);

  subscribe(update);
}

/**
 * @param {number} elapsed
 * @param {number} _delta
 */
export function update(elapsed, _delta) {
  // Gentle float animation
  const ud = _sprite.userData;
  _sprite.position.y = ud.baseY + Math.sin(elapsed * ud.floatSpeed + ud.floatPhase) * 0.08;

  // Scan line — horizontal sweep
  const W = 512, H = 512;
  _scanCtx.clearRect(0, 0, W, H);
  const scanY = ((elapsed * 60) % H);
  const grad = _scanCtx.createLinearGradient(0, scanY - 20, 0, scanY + 20);
  grad.addColorStop(0,   'rgba(68, 136, 255, 0)');
  grad.addColorStop(0.5, 'rgba(68, 136, 255, 0.4)');
  grad.addColorStop(1,   'rgba(68, 136, 255, 0)');
  _scanCtx.fillStyle = grad;
  _scanCtx.fillRect(0, scanY - 20, W, 40);
  _scanTexture.needsUpdate = true;
}

export function dispose() {
  if (_group) _scene.remove(_group);
  if (_scanTexture) _scanTexture.dispose();
}