// PROCITY Lane B — venue.js  (round 13, v3.0-beta THE DISTRICT, ?gigs=1)
// The street-side presentation of the town's 2–4 venues (pub / band_room / rsl). Round 13 generalises
// the R12 one-pub slice to the whole district and adds the night-readability polish:
//   (1) town-wide gig POSTERS — E's poster skins at A's plan.posters positions, band name overprinted,
//       instanced per gig so the whole town is a handful of draws;
//   (2) a lit FRONTAGE per venue — warm marquee + bulb row over the door, ramped per-venue by F's gig
//       state; window-light spill so the shopfront lifts out of the dark;
//   (3) STREETLAMP POOLS on each venue block — warm pools of light on the footpath so the Friday-night
//       walk reads (the money-shot polish). One instanced mesh, night-driven;
//   (4) a QUEUE ZONE marker per venue, publishing `venue.queueZone = {x,z,ry,len}` for Lane D's line.
//
// Prime flag law: this module is ONLY constructed by the shell under ?gigs (like weather.js/tram.js), so
// flags-off boot is byte-identical — the shell never builds it, and nothing here is on the always-on
// night path. Asset law: a missing poster JPEG (or ?noassets) falls back to a flat printed poster and
// fetches nothing. Deterministic from citySeed. B owns the street side of the gig seam.
//
// Orientation: a venue's facade/door is on the lot's local +Z (buildings.js canon: front = +Z), so the
// frontage, pools and queue seat on (sin ry, cos ry) — the STREET side. A's plan.posters carry their own
// ry under A's poster convention (front = local −Z); posters are rendered at A's (x,z,ry) verbatim.

import * as THREE from 'three';

const POSTER_W = 1.05, POSTER_H = 1.5;                 // ~A2 bill on a pole/wall
const POSTER_SKINS = ['grunge', 'retro', 'screenprint', 'xerox'];   // E's poster pack (assets/gen/poster-*.jpg)
const NAME_ZONE = [0.08, 0.04, 0.84, 0.23];            // manifest skins.poster.*.nameZone (band-name band)

export function createVenuePresentation(plan, skins, scene, { assetBase = 'assets/gen/' } = {}) {
  const group = new THREE.Group(); group.name = 'venue-presentation';
  const disposables = [];
  const params = (() => { try { return new URLSearchParams(location.search); } catch { return new URLSearchParams(); } })();
  const NOASSETS = params.get('noassets') != null && params.get('noassets') !== '0';   // house law: zero fetch

  const gigs = plan.gigs || [];
  const posters = plan.posters || [];
  const lotById = new Map((plan.lots || []).map((l) => [l.id, l]));
  const gigById = new Map(gigs.map((g) => [g.gigId, g]));
  // tonight = night 0 (matches gig_state.js / A's poster selection). Primary venue = the alpha machine's
  // gigs[0] venue, so a legacy single-string update() still lights the right frontage mid-round.
  const primaryId = gigs.length ? gigs[0].venueShopId : null;

  const venueShops = (plan.shops || []).filter((s) => s.venue);
  // R12 fallback (no A gig-layer venue flag): treat the pub as the sole venue.
  if (!venueShops.length) {
    const pub = (plan.shops || []).find((s) => s.type === 'pub');
    if (pub) venueShops.push(pub);
  }

  // ── town-wide posters, instanced per gig (one draw + one texture per advertised gig) ──────────────
  // A given gig's poster looks the same wherever it's pasted, so we group A's poster positions by gigId,
  // pick ONE seeded skin per gig, and render each group as a single InstancedMesh. Town-wide the whole
  // poster layer is ≤ (tonight's playing venues) draws instead of one mesh + one canvas per bill.
  let posterDraws = 0;
  {
    const byGig = new Map();
    for (const p of posters) {
      const gid = p.gigId != null ? p.gigId : -1;
      if (!byGig.has(gid)) byGig.set(gid, []);
      byGig.get(gid).push(p);
    }
    const _m = new THREE.Matrix4(), _pos = new THREE.Vector3(), _q = new THREE.Quaternion(), _s = new THREE.Vector3(1, 1, 1), _up = new THREE.Vector3(0, 1, 0);
    for (const [gid, list] of byGig) {
      const gig = gigById.get(gid) || gigs[0] || null;
      const band = gig ? gig.bandName : 'LIVE TONIGHT';
      const skin = POSTER_SKINS[(((gid | 0) + (plan.citySeed >>> 0)) % POSTER_SKINS.length + POSTER_SKINS.length) % POSTER_SKINS.length];
      const tex = posterTexture(assetBase, skin, band, NOASSETS); disposables.push(tex);
      const mat = new THREE.MeshStandardMaterial({ map: tex, roughness: 0.92, metalness: 0, side: THREE.DoubleSide });
      const geo = new THREE.PlaneGeometry(POSTER_W, POSTER_H);
      disposables.push(mat, geo);
      const inst = new THREE.InstancedMesh(geo, mat, list.length);
      inst.name = 'venue-posters';
      for (let i = 0; i < list.length; i++) {
        const p = list[i];
        // A's poster ry is under the poster convention (front = local −Z ⇒ world facing (−sin,−cos)); a
        // PlaneGeometry faces +Z, so rotate ry+π to point its printed face along A's outward normal.
        _q.setFromAxisAngle(_up, (p.ry || 0) + Math.PI);
        _pos.set(p.x, 2.0, p.z);
        inst.setMatrixAt(i, _m.compose(_pos, _q, _s));
      }
      inst.instanceMatrix.needsUpdate = true;
      inst.receiveShadow = true;
      group.add(inst);
      posterDraws++;
    }
  }

  // ── per-venue frontage + window-spill + queue zone ────────────────────────────────────────────────
  const venues = [];
  const poolSpecs = [];   // {x,z,diam} collected across all venues → one instanced pool mesh
  for (const shop of venueShops) {
    const lot = lotById.get(shop.lot);
    if (!lot) continue;
    const ry = lot.ry || 0;
    const fx = Math.sin(ry), fz = Math.cos(ry);          // facade OUTWARD normal (local +Z → street side)
    const rx = Math.cos(ry), rz = -Math.sin(ry);         // frontage tangent ("right" along the shopfront)
    const w = lot.w || 8, d = lot.d || 10;
    const zf = d / 2 + 0.06;                             // just proud of the facade plane
    const cx = lot.x + fx * zf, cz = lot.z + fz * zf;    // shopfront centre, on the street

    const frontage = new THREE.Group(); frontage.name = 'venue-frontage';

    // warm marquee slab above the entrance
    const marqueeMat = new THREE.MeshStandardMaterial({ color: 0x241608, emissive: new THREE.Color(0xffc978), emissiveIntensity: 0 });
    const mw = Math.min(w * 0.92, 6.5);
    const mgeo = new THREE.BoxGeometry(mw, 0.55, 0.35);
    const marquee = new THREE.Mesh(mgeo, marqueeMat);
    marquee.position.set(cx, 3.5, cz); marquee.rotation.y = ry;
    disposables.push(marqueeMat, mgeo);

    // a row of marquee "bulbs" (emissive dots) along the front edge of the slab
    const bulbMat = new THREE.MeshStandardMaterial({ color: 0x3a2a10, emissive: new THREE.Color(0xffe6b0), emissiveIntensity: 0 });
    const bgeo = new THREE.SphereGeometry(0.06, 6, 5);
    const nb = Math.max(4, Math.round(mw / 0.6));
    const bulbs = new THREE.InstancedMesh(bgeo, bulbMat, nb);
    const _bm = new THREE.Matrix4();
    for (let i = 0; i < nb; i++) {
      const t = (i / (nb - 1) - 0.5) * mw;
      _bm.makeTranslation(cx + rx * t, 3.25, cz + rz * t);
      bulbs.setMatrixAt(i, _bm);
    }
    bulbs.instanceMatrix.needsUpdate = true;
    disposables.push(bulbMat, bgeo);

    // window-light spill — a soft warm wash on the ground-floor shopfront so it lifts out of the dark.
    // Additive so it reads as light, not paint; opacity ramps with the gig (and a faint night baseline).
    const glowMat = new THREE.MeshBasicMaterial({ color: 0xffca82, transparent: true, opacity: 0, blending: THREE.AdditiveBlending, depthWrite: false, side: THREE.DoubleSide, fog: false, toneMapped: false });
    const glowGeo = new THREE.PlaneGeometry(w * 0.94, 2.4);
    const glow = new THREE.Mesh(glowGeo, glowMat);
    glow.position.set(cx + fx * 0.05, 1.35, cz + fz * 0.05); glow.rotation.y = ry;   // faces the street (+Z)
    disposables.push(glowMat, glowGeo);

    frontage.add(marquee, bulbs, glow);
    group.add(frontage);

    // streetlamp pools on this venue's block — one bright pool at the door, a couple spaced along the
    // frontage footpath (pushed out onto the verge so they pool on the footpath, not under the awning).
    const footOut = 1.9;
    poolSpecs.push({ x: cx + fx * 0.6, z: cz + fz * 0.6, diam: 5.0 });          // door pool (bright, wide)
    const along = Math.min(w * 0.42, 3.2);
    poolSpecs.push({ x: cx + rx * along + fx * footOut, z: cz + rz * along + fz * footOut, diam: 3.6 });
    poolSpecs.push({ x: cx - rx * along + fx * footOut, z: cz - rz * along + fz * footOut, diam: 3.6 });

    // queue zone (Lane D): the line forms on the footpath, off to one side of the door so it doesn't
    // block the entrance, and runs ALONG the frontage away from the door. Published for D's poses.
    const qHeadX = cx + rx * (mw * 0.5 + 0.6) + fx * 1.1;   // just past the marquee edge, out on the footpath
    const qHeadZ = cz + rz * (mw * 0.5 + 0.6) + fz * 1.1;
    const qRy = Math.atan2(rx, rz);                          // heading the queue EXTENDS (along +right); face door = −this
    const queueZone = { x: r2(qHeadX), z: r2(qHeadZ), ry: r4(qRy), len: 5.0 };

    // a subtle painted marker on the ground (chalk-pale dashes) so the zone reads even before D's line —
    // primitive, cheap, night-agnostic. Collected into the pool pass? No — keep it a thin flat quad strip.
    const markMat = new THREE.MeshBasicMaterial({ color: 0xbfb9a6, transparent: true, opacity: 0.16, depthWrite: false, side: THREE.DoubleSide, toneMapped: false });
    const markGeo = new THREE.PlaneGeometry(0.5, queueZone.len);
    markGeo.rotateX(-Math.PI / 2);
    const mark = new THREE.Mesh(markGeo, markMat);
    mark.position.set(qHeadX + rx * (queueZone.len / 2), 0.021, qHeadZ + rz * (queueZone.len / 2));
    mark.rotation.y = qRy;
    disposables.push(markMat, markGeo);
    group.add(mark);

    venues.push({
      venueShopId: shop.id, kind: shop.venueKind || shop.type, genreKey: shop.genreKey || null,
      lot, frontage, marqueeMat, bulbMat, glowMat, queueZone,
      _glowCur: 0, _emisCur: 0,
    });
  }

  // ── one instanced streetlamp-pool mesh for the whole district (night-driven) ──────────────────────
  let poolMesh = null, poolMat = null;
  if (poolSpecs.length) {
    const poolTex = poolTexture(); disposables.push(poolTex);
    poolMat = new THREE.MeshBasicMaterial({ map: poolTex, transparent: true, opacity: 0, depthWrite: false, blending: THREE.AdditiveBlending, side: THREE.DoubleSide, fog: false, toneMapped: false });
    const pg = new THREE.PlaneGeometry(1, 1); pg.rotateX(-Math.PI / 2);   // lies flat, normal +Y
    disposables.push(poolMat, pg);
    poolMesh = new THREE.InstancedMesh(pg, poolMat, poolSpecs.length);
    poolMesh.name = 'venue-pools';
    const _pm = new THREE.Matrix4(), _pp = new THREE.Vector3(), _pq = new THREE.Quaternion(), _ps = new THREE.Vector3();
    for (let i = 0; i < poolSpecs.length; i++) {
      const s = poolSpecs[i];
      _pp.set(s.x, 0.02, s.z); _ps.set(s.diam, 1, s.diam);
      poolMesh.setMatrixAt(i, _pm.compose(_pp, _pq, _ps));
    }
    poolMesh.instanceMatrix.needsUpdate = true;
    group.add(poolMesh);
  }

  scene.add(group);

  // ── per-venue state → frontage glow. Accepts F's per-venue map { [venueShopId]: state }, a Map, an
  // { byVenue } wrapper, OR a bare state string (alpha compat → the primary pub). Idempotent; the shell
  // calls it every street frame, so pool/glow ramps and the night baseline lerp here. ────────────────
  function stateGetter(gigStates) {
    if (gigStates == null) return () => 'quiet';
    if (typeof gigStates === 'string') return (id) => (id === primaryId ? gigStates : 'quiet');
    const map = gigStates.byVenue || gigStates;
    return (id) => {
      const v = map instanceof Map ? map.get(id) : map[id];
      if (v == null) return 'quiet';
      return typeof v === 'string' ? v : (v.state || 'quiet');
    };
  }
  function levelFor(s) { return s === 'on' ? 1 : s === 'doors' ? 0.55 : 0; }

  function update(gigStates) {
    const get = stateGetter(gigStates);
    const night = !!(typeof window !== 'undefined' && window.PROCITY?.lighting?.getClock?.().night);
    for (const v of venues) {
      const lvl = levelFor(get(v.venueShopId));
      // marquee/bulbs emissive follow the gig (they only matter visually near night anyway)
      const emisT = lvl * 1.7;
      v._emisCur += (emisT - v._emisCur) * 0.25;
      if (Math.abs(emisT - v._emisCur) < 0.004) v._emisCur = emisT;
      v.marqueeMat.emissiveIntensity = v._emisCur;
      v.bulbMat.emissiveIntensity = v._emisCur * 1.15;
      // window spill: a faint night baseline (someone's in) + the gig glow, off entirely by day
      const glowT = night ? 0.14 + lvl * 0.4 : 0;
      v._glowCur += (glowT - v._glowCur) * 0.15;
      if (Math.abs(glowT - v._glowCur) < 0.004) v._glowCur = glowT;
      v.glowMat.opacity = v._glowCur;
    }
    // streetlamp pools: on at night (streetlamps don't care about gigs), off by day
    if (poolMat) {
      const poolT = night ? 0.5 : 0;
      poolMat.opacity += (poolT - poolMat.opacity) * 0.1;
      if (Math.abs(poolT - poolMat.opacity) < 0.004) poolMat.opacity = poolT;
      if (poolMesh) poolMesh.visible = poolMat.opacity > 0.01;
    }
  }
  update('quiet');

  function dispose() {
    for (const d of disposables) d.dispose && d.dispose();
    group.traverse((o) => { if (o.isInstancedMesh) o.dispose && o.dispose(); });
    scene.remove(group);
  }

  const queueZones = {};
  for (const v of venues) queueZones[v.venueShopId] = v.queueZone;

  return {
    group, venues, update, dispose,
    venueShopId: primaryId || (venues[0] && venues[0].venueShopId) || null,   // alpha compat
    venueShopIds: venues.map((v) => v.venueShopId),
    queueZones,
    queueZoneFor(id) { const v = venues.find((x) => x.venueShopId === id); return v ? v.queueZone : null; },
    // R12 compat: the primary venue's frontage group (some callers referenced `.frontage`)
    get frontage() { return venues[0] ? venues[0].frontage : null; },
    get posterCount() { return posters.length; },
    get posterDraws() { return posterDraws; },
  };
}

const r2 = (v) => Math.round(v * 100) / 100;
const r4 = (v) => Math.round(v * 10000) / 10000;

// ── a warm radial streetlamp-pool sprite (procedural, no fetch): bright warm centre → transparent edge.
function poolTexture() {
  const S = 128;
  const c = document.createElement('canvas'); c.width = S; c.height = S;
  const x = c.getContext('2d');
  const g = x.createRadialGradient(S / 2, S / 2, 2, S / 2, S / 2, S / 2);
  g.addColorStop(0.00, 'rgba(255,226,170,0.85)');
  g.addColorStop(0.45, 'rgba(255,205,130,0.35)');
  g.addColorStop(1.00, 'rgba(255,190,110,0.0)');
  x.fillStyle = g; x.fillRect(0, 0, S, S);
  const tex = new THREE.CanvasTexture(c); tex.colorSpace = THREE.SRGBColorSpace;
  return tex;
}

// ── per-gig canvas: E's poster art with the band name overprinted in its nameZone. ──
// Flat printed-poster fallback drawn first (house law: right with zero JPEGs); the art is drawn over it
// when the same-origin image decodes (canvas stays untainted), then the name is re-stamped on top. Under
// ?noassets we skip the fetch entirely (zero network) and keep the flat poster.
function posterTexture(assetBase, skin, band, noassets) {
  const W = 240, H = 342;
  const c = document.createElement('canvas'); c.width = W; c.height = H;
  const x = c.getContext('2d');
  x.fillStyle = '#141019'; x.fillRect(0, 0, W, H);                 // dark backing
  x.fillStyle = '#cbb98f'; x.fillRect(8, 8, W - 16, H - 16);       // aged paper
  x.fillStyle = '#7a2a24'; x.fillRect(8, H * 0.62, W - 16, 3);
  x.fillStyle = '#1c1712'; x.font = 'bold 13px Arial'; x.textAlign = 'center';
  x.fillText('LIVE · TONIGHT', W / 2, H * 0.72);
  const tex = new THREE.CanvasTexture(c); tex.colorSpace = THREE.SRGBColorSpace; tex.anisotropy = 4;
  drawBandName(x, W, H, band);
  if (!noassets) {
    const img = new Image();
    img.onload = () => { x.drawImage(img, 0, 0, W, H); drawBandName(x, W, H, band); tex.needsUpdate = true; };
    img.onerror = () => {};                                        // fallback poster already drawn
    img.src = `${assetBase}poster-${skin}.jpg`;
  }
  return tex;
}

function drawBandName(x, W, H, band) {
  const [nx, ny, nw, nh] = NAME_ZONE;
  const zx = nx * W, zy = ny * H, zw = nw * W, zh = nh * H;
  const label = String(band).toUpperCase();
  x.save();
  x.textAlign = 'center'; x.textBaseline = 'middle';
  let fs = zh * 0.72;
  do { x.font = `bold ${fs}px Arial, sans-serif`; fs -= 2; } while (x.measureText(label).width > zw - 6 && fs > 8);
  x.fillStyle = 'rgba(0,0,0,0.55)'; x.fillText(label, zx + zw / 2 + 1.2, zy + zh / 2 + 1.2);   // shadow
  x.fillStyle = '#f7ecc8'; x.fillText(label, zx + zw / 2, zy + zh / 2);
  x.restore();
}