// ═══ renderer-shop-overlay.js ═══
// ============================================================
//  RENDERER SHOP — canvas armory / command overlays
// ============================================================

const _SH_HDR_H  = 56;
const _SH_TAB_H  = 38;
const _SH_BODY_Y = _SH_HDR_H + _SH_TAB_H;   // 94 — armory body start (below tabs)
const _SH_PAD    = 24;
const _SH_UPG_W  = 130;
const _SH_UPG_H  = 78;
const _SH_ARR_W  = 26;

let _shopScrollY   = 0;
let _shopScrollMax = 0;
const _shopRightClick = [];

function _shopWrapText(text, maxW, maxLines) {
  if (!text) return [];
  const words = text.split(' ');
  const lines = [];
  let cur = '';
  for (const w of words) {
    const test = cur ? cur + ' ' + w : w;
    if (ctx.measureText(test).width <= maxW) { cur = test; }
    else { if (cur) lines.push(cur); cur = w; if (lines.length >= maxLines) break; }
  }
  if (cur && lines.length < maxLines) lines.push(cur);
  return lines;
}

function _shopUpgNode(sx, screenY, upg, bought, locked, cantAfford, onBuy, onRefund, lockLabel = null) {
  const hov = !bought && !locked && !cantAfford && isHovered(sx, screenY, _SH_UPG_W, _SH_UPG_H);
  const border = bought ? '#1a5030' : locked ? '#0e1e28' : cantAfford ? '#1a2030' : hov ? '#ffd700' : '#1a3048';
  ctx.save();
  ctx.globalAlpha = bought ? 0.75 : locked ? 0.32 : cantAfford ? 0.55 : 1;
  ctx.fillStyle = bought ? '#071410' : '#060e18';
  ctx.strokeStyle = border; ctx.lineWidth = 1;
  ctx.fillRect(sx, screenY, _SH_UPG_W, _SH_UPG_H);
  ctx.strokeRect(sx, screenY, _SH_UPG_W, _SH_UPG_H);

  ctx.save();
  ctx.beginPath(); ctx.rect(sx + 5, screenY + 5, _SH_UPG_W - 10, 16); ctx.clip();
  ctx.font = '11px Orbitron, "Share Tech Mono", monospace'; ctx.letterSpacing = '0.5px';
  ctx.textAlign = 'left'; ctx.textBaseline = 'top';
  ctx.fillStyle = bought ? '#00ff88' : '#b8d8e8';
  ctx.fillText(upg.label, sx + 5, screenY + 5);
  ctx.restore();

  ctx.save();
  ctx.beginPath(); ctx.rect(sx + 5, screenY + 22, _SH_UPG_W - 10, 30); ctx.clip();
  ctx.font = '10px "Share Tech Mono", monospace'; ctx.letterSpacing = '0px';
  ctx.textAlign = 'left'; ctx.textBaseline = 'top'; ctx.fillStyle = '#3a6080';
  const lines = _shopWrapText(upg.desc, _SH_UPG_W - 12, 2);
  for (let li = 0; li < lines.length; li++) ctx.fillText(lines[li], sx + 5, screenY + 22 + li * 14);
  ctx.restore();

  ctx.font = '10px "Share Tech Mono", monospace'; ctx.letterSpacing = '0px';
  ctx.textAlign = 'left'; ctx.textBaseline = 'top';
  if (bought) { ctx.fillStyle = '#1a4030'; ctx.fillText('✓ right-click refund', sx + 5, screenY + 58); }
  else if (locked && lockLabel) { ctx.fillStyle = '#ff6b3566'; ctx.fillText('Req: ' + lockLabel, sx + 5, screenY + 58); }
  else if (locked) { ctx.fillStyle = '#1a2838'; ctx.fillText('🔒 locked', sx + 5, screenY + 58); }
  else { ctx.fillStyle = cantAfford ? '#ff3355' : '#ffd700'; ctx.fillText(upg.cost + '¢', sx + 5, screenY + 58); }

  ctx.restore();
  if (onBuy)    addHitRegion(sx, screenY, _SH_UPG_W, _SH_UPG_H, onBuy);
  if (onRefund) _shopRightClick.push({ x: sx, y: screenY, w: _SH_UPG_W, h: _SH_UPG_H, action: onRefund });
}

// ── Shared header for both overlays ───────────────────────────
function _drawOverlayHeader(W, title, closeFn) {
  ctx.fillStyle = '#040c14';
  ctx.fillRect(0, 0, W, _SH_HDR_H);
  ctx.strokeStyle = '#1a3048'; ctx.lineWidth = 1;
  ctx.beginPath(); ctx.moveTo(0, _SH_HDR_H); ctx.lineTo(W, _SH_HDR_H); ctx.stroke();

  ctx.font = '900 15px Orbitron, "Share Tech Mono", monospace'; ctx.letterSpacing = '6px';
  ctx.textAlign = 'left'; ctx.textBaseline = 'middle';
  ctx.fillStyle = '#00d4ff'; ctx.shadowColor = '#00d4ff44'; ctx.shadowBlur = 14;
  ctx.fillText(title, _SH_PAD, _SH_HDR_H / 2);
  ctx.shadowBlur = 0; ctx.letterSpacing = '0px';

  ctx.font = '18px Orbitron, "Share Tech Mono", monospace';
  ctx.textAlign = 'center'; ctx.fillStyle = '#ffd700';
  ctx.fillText('💰 ' + G.credits + '¢', W / 2, _SH_HDR_H / 2);

  const CBW = 160, CBH = 32;
  const CBX = W - _SH_PAD - CBW, CBY = (_SH_HDR_H - CBH) / 2;
  const cbHov = isHovered(CBX, CBY, CBW, CBH);
  ctx.fillStyle = cbHov ? '#3d0808' : 'transparent';
  ctx.strokeStyle = '#ff3355'; ctx.lineWidth = 1;
  ctx.fillRect(CBX, CBY, CBW, CBH); ctx.strokeRect(CBX, CBY, CBW, CBH);
  ctx.font = '11px Orbitron, monospace'; ctx.letterSpacing = '2px';
  ctx.textAlign = 'center'; ctx.textBaseline = 'middle'; ctx.fillStyle = '#ff3355';
  ctx.fillText('✕ CLOSE [Esc]', CBX + CBW / 2, CBY + CBH / 2);
  ctx.letterSpacing = '0px';
  addHitRegion(CBX, CBY, CBW, CBH, closeFn);
}

// ── ARMORY OVERLAY — weapon buying + per-weapon upgrade trees ──
function drawArmoryOverlay() {
  if (!G.armoryOpen) return;
  _shopRightClick.length = 0;

  const W = canvas.width, H = canvas.height;
  const BODY_H = H - _SH_BODY_Y;

  ctx.fillStyle = 'rgba(2,8,14,0.97)';
  ctx.fillRect(0, 0, W, H);
  ctx.save();

  _drawOverlayHeader(W, 'ARMORY', closeArmory);

  ctx.save();
  ctx.beginPath(); ctx.rect(0, _SH_BODY_Y, W, BODY_H); ctx.clip();
  const bodyCX = _SH_PAD, bodyCW = W - _SH_PAD * 2;
  let yOff = _SH_PAD;

  yOff = _shopDrawBuyContent(yOff, bodyCX, bodyCW, H);

  _shopScrollMax = Math.max(0, yOff - BODY_H + _SH_PAD);
  ctx.restore();
  ctx.restore();
}

// ── COMMAND OVERLAY — tower/base upgrades ─────────────────────
function drawCommandOverlay() {
  if (!G.commandOpen) return;
  _shopRightClick.length = 0;

  const W = canvas.width, H = canvas.height;
  const BODY_H = H - _SH_BODY_Y;

  ctx.fillStyle = 'rgba(2,8,14,0.97)';
  ctx.fillRect(0, 0, W, H);
  ctx.save();

  _drawOverlayHeader(W, 'COMMAND', closeCommand);

  ctx.save();
  ctx.beginPath(); ctx.rect(0, _SH_BODY_Y, W, BODY_H); ctx.clip();
  const bodyCX = _SH_PAD, bodyCW = W - _SH_PAD * 2;
  let yOff = _SH_PAD;

  yOff = _shopDrawTowerContent(yOff, bodyCX, bodyCW, H);

  _shopScrollMax = Math.max(0, yOff - BODY_H + _SH_PAD);
  ctx.restore();
  ctx.restore();
}