const pptxgen = require("pptxgenjs");
const { execSync } = require("child_process");

// ── helpers ──────────────────────────────────────────────────────────────────
function fetchImages(urls) {
  try {
    const arg = urls.map(u => `"${u}"`).join(" ");
    const raw = execSync(
      `node /home/daytona/skills/shared/scripts/fetch_images.js ${arg}`,
      { maxBuffer: 50 * 1024 * 1024 }
    ).toString();
    return JSON.parse(raw);
  } catch (e) {
    console.error("fetchImages error:", e.message);
    return urls.map(u => ({ url: u, base64: null, error: e.message }));
  }
}

// ── colour palette ────────────────────────────────────────────────────────────
const DEEP_NAVY   = "0D1B2A";   // dominant dark
const MID_BLUE    = "1B4F8A";   // header accent
const TEAL        = "0A7E8C";   // sub-accent
const CREAM       = "F5F0E8";   // slide background
const GOLD        = "C8963E";   // highlight accent
const WHITE       = "FFFFFF";
const DARK_TEXT   = "1A1A2E";
const LIGHT_GREY  = "E8EDF2";

// ── specimen data ─────────────────────────────────────────────────────────────
const specimens = [
  {
    title: "01. Carcinoma Colon",
    type: "Adenocarcinoma (95%)",
    gross: "Annular/fungating mass; apple-core deformity on barium",
    micro: "Malignant glands invading bowel wall; mucin pools; dirty necrosis",
    key: ["Dukes A/B/C — never described D himself",
          "Right colon → polypoid, anemia; Left → annular, obstruction",
          "CEA tumour marker; KRAS/BRAF mutations"],
    trick: "Apple core = Left colon Ca (annular constriction)",
    images: [
      "https://cdn.orris.care/cdss_images/1dbc47a11a0802d5d9f652705bbc8630072c2783912547ad293fefe9a7038168.png",
      "https://cdn.orris.care/cdss_images/7043c8abbc26b0f1ce6b091ea69e92d78df449e227fa062c55cf32f654e6f8ec.png"
    ]
  },
  {
    title: "02. Trichobezoar",
    type: "Hair concretion in stomach",
    gross: "Black, foul-smelling, cast of stomach; matted hair mass",
    micro: "Hair shafts + undigested food debris; no epithelium (not a cyst)",
    key: ["Young female, trichotillomania + trichophagia",
          "Rapunzel syndrome: tail extends into small bowel",
          "Tx: large → surgical gastrotomy; small → endoscopy + CBT"],
    trick: "Rapunzel = long tail through pylorus",
    images: []
  },
  {
    title: "03. TB Lymph Node",
    type: "Granulomatous lymphadenitis (Scrofula)",
    gross: "Matted nodes; central caseation; collar-stud abscess",
    micro: "Caseating granuloma: Langhans giant cells + epithelioid cells + caseous centre",
    key: ["Langhans: peripheral horseshoe nuclei arrangement",
          "Collar-stud: abscess perforates deep fascia (hourglass shape)",
          "ATT 2HRZE + 4HR; surgery only if no ATT response"],
    trick: "Collar stud = cufflink shaped (button above + below fascia)",
    images: []
  },
  {
    title: "04. Hodgkin's Lymph Node",
    type: "Hodgkin Lymphoma (Classical)",
    gross: "Rubbery, matted, non-tender lymph nodes; fish-flesh cut surface",
    micro: "Reed-Sternberg cells (owl-eye nucleoli): CD15+, CD30+, CD45−",
    key: ["Nodular sclerosis = most common subtype (60-70%)",
          "Contiguous nodal spread (unlike NHL)",
          "ABVD chemo ± RT; >85% cure rate stage I/II",
          "B symptoms: fever, night sweats, >10% weight loss"],
    trick: "RS cell = OWL EYES | ABVD = A Big Vicious Drug",
    images: []
  },
  {
    title: "05. GB Stone",
    type: "Cholelithiasis",
    gross: "Cholesterol (yellow, single/multiple); Pigment-black (hemolysis); Pigment-brown (infected)",
    micro: "Chronic cholecystitis: mucosal atrophy, Rokitansky-Aschoff sinuses, fibrosis",
    key: ["5 F's: Fat, Forty, Female, Fertile, Fair",
          "Rigler's triad (gallstone ileus): pneumobilia + SBO + ectopic stone",
          "Charcot triad: RUQ pain + fever + jaundice",
          "Gold standard Tx: Laparoscopic cholecystectomy"],
    trick: "Black = Bag (GB, hemolysis); Brown = Bile Duct (infected)",
    images: []
  },
  {
    title: "06. Metastasis in Liver",
    type: "Secondary hepatic deposits",
    gross: "Multiple whitish umbilicated nodules; central necrosis (outgrows blood supply)",
    micro: "Adenocarcinoma glands (colon primary most common); 'dirty necrosis'",
    key: ["Colorectal = most common primary (portal drainage)",
          "Resectable criteria: adequate FLR >25%, R0 achievable",
          "Fong score: 5 factors; 0-2 = good prognosis",
          "Unresectable: FOLFOX ± bevacizumab"],
    trick: "Umbilicated = central necrosis (like a belly button dipping in)",
    images: [
      "https://cdn.orris.care/cdss_images/82872323800ba714e8e0dbbb13f26bbbbcdc6bb0837f078f7a27471379c61e62.png"
    ]
  },
  {
    title: "07. Intestinal Worms",
    type: "Helminthiasis (Ascaris lumbricoides most common)",
    gross: "Long cylindrical pinkish worms (15-35 cm); may form bolus causing obstruction",
    micro: "Nematode cross-section: lateral ridges, polymyarian musculature, intestine, reproductive organs",
    key: ["Biliary ascariasis: worm in CBD → 'railway track' sign on USG",
          "Obstruction: conservative first, piperazine (paralyzes worms)",
          "Treatment: Albendazole 400 mg single dose",
          "Piperazine used in obstruction — does NOT kill, just paralyzes"],
    trick: "Piperazine = Paralyzes (safe in obstruction); Albendazole = Kills all",
    images: []
  },
  {
    title: "08. Meckel's Diverticulum",
    type: "True congenital GI diverticulum",
    gross: "Finger-like outpouching from antimesenteric border of ileum, 2 feet from IC valve",
    micro: "All bowel wall layers (true diverticulum); ectopic gastric mucosa (50%) or pancreatic",
    key: ["Rule of 2s: 2%, 2 ft, 2 inches, 2 types mucosa, 2 yrs, 2× males",
          "Painless rectal bleeding in child (brick-red / maroon) = #1 presentation",
          "Diagnosis: Tc-99m pertechnetate scan (Meckel's scan)",
          "Malignancy in Meckel's: carcinoid (most common)"],
    trick: "Rule of 2s — most common congenital GI anomaly ever!",
    images: [
      "https://cdn.orris.care/cdss_images/b50fe6c5b3c2c35971d12c5c3de96a7cd086d7ab8efe5914b5a94c63d2e0e6ce.png",
      "https://cdn.orris.care/cdss_images/8d9d5940714d4f5197f0c6e1f1c613e4e0b53c69482014e2e65baea81fee4036.png"
    ]
  },
  {
    title: "09. TB Intestine",
    type: "Intestinal tuberculosis",
    gross: "Ileocecal hypertrophic mass OR transverse ulcers (collar-button) in ileum",
    micro: "Caseating granuloma in submucosa/serosa; Langhans giant cells",
    key: ["Most common site: Ileocecal junction (Peyer's patches + stasis)",
          "Transverse ulcers (TB) vs Longitudinal (Typhoid)",
          "Hypertrophic type mimics Ca cecum / Crohn's disease",
          "Caseating granuloma = TB; Non-caseating = Crohn's/Sarcoid"],
    trick: "TB = Transverse; Typhoid = Tangential(Longitudinal)",
    images: []
  },
  {
    title: "10. Hydatid Cyst",
    type: "Echinococcus granulosus (Cystic echinococcosis)",
    gross: "Pericyst (host fibrous wall) + ectocyst (white laminated) + endocyst (germinal); daughter cysts",
    micro: "Laminated eosinophilic membrane; germinal layer with scolices; brood capsules; hooklets",
    key: ["Dog (definitive) → Sheep (intermediate) → Human (accidental)",
          "Water lily sign on USG: collapsed membrane floating in cyst",
          "PAIR: Puncture, Aspirate, Inject (hypertonic saline), Re-aspirate",
          "Medical: Albendazole before + after procedure"],
    trick: "DOG gives SHEEP gets HUMAN suffers | PAIR = 4-step procedure",
    images: [
      "https://cdn.orris.care/cdss_images/fae0bb18d4a4cc362d6a23f8614b116745deb21873fb404f71becc542f02ee1c.png",
      "https://cdn.orris.care/cdss_images/8f8e2a166458849e8feec02ed7ac2f07d8d249eb15787d1dc222e224a3218f88.png"
    ]
  },
  {
    title: "11. Ca Stomach",
    type: "Gastric Adenocarcinoma (95%)",
    gross: "Ulcerative (most common) / Polypoid / Linitis plastica ('leather bottle')",
    micro: "Intestinal type (tubular glands, H.pylori related); Diffuse type (signet ring cells, worse)",
    key: ["Named mets: Virchow (L SCF), Krukenberg (ovary), Sister MJ (umbilicus), Blumer (rectum PR)",
          "Linitis plastica = diffuse infiltration + fibrosis = rigid stomach",
          "Curative Tx: Subtotal/Total gastrectomy + D2 lymphadenectomy",
          "H. pylori = #1 risk factor (>70%)"],
    trick: "VKBS = Virchow, Krukenberg, Blumer, Sister MJ — 4 named metastases",
    images: []
  },
  {
    title: "12. Amoebic Liver Abscess",
    type: "Entamoeba histolytica hepatic abscess",
    gross: "Single abscess, right lobe; 'anchovy sauce' = dark brown odourless liquid necrotic liver",
    micro: "Liquefactive necrosis; E. histolytica trophozoites at wall (PAS positive); no true pus",
    key: ["Right lobe, single (portal streaming from right colon)",
          "ELISA serology positive in 95%; dramatic response to metronidazole",
          "Tx: Metronidazole 800 mg TID x10d → Diloxanide furoate 500 mg TID x10d",
          "Drain if: no response 72h, >10 cm, left lobe (cardiac tamponade risk)"],
    trick: "ANCHOR(vy sauce) = AMOEBIC | Metro kills trophozoites; Dilox kills gut cysts",
    images: []
  },
  {
    title: "13. Polycystic Kidney",
    type: "ADPKD (Adult) / ARPKD (Infantile)",
    gross: "Massively enlarged kidney replaced by innumerable cysts of varying size; compressed parenchyma",
    micro: "Dilated tubules forming cysts lined by flattened epithelium; interstitial fibrosis",
    key: ["ADPKD: PKD1 (chr 16) / PKD2 (chr 4); Berry aneurysms + hepatic cysts",
          "ARPKD: PKHD1 gene; congenital hepatic fibrosis; Potter sequence at birth",
          "Tolvaptan (V2R antagonist) slows progression in rapid ADPKD",
          "Hypertension = first symptom; ACE inhibitors preferred"],
    trick: "PKD1 = chromosome 16 (1×16); PKD2 = chromosome 4 (2×4=8... just remember 4!)",
    images: []
  },
  {
    title: "14. Seminoma",
    type: "Testicular Germ Cell Tumour — Seminoma",
    gross: "Homogeneous, grey-white, lobulated, replaces entire testis; no haemorrhage/necrosis",
    micro: "'Fried egg' cells: large clear cytoplasm, prominent nucleolus; fibrous septa + lymphocytes",
    key: ["AFP always NORMAL in pure seminoma (elevation = mixed/NSGCT)",
          "β-hCG mildly elevated in 15%; LDH elevated",
          "Most radiosensitive testicular tumour",
          "ALWAYS inguinal orchidectomy — NEVER scrotal (lymphatic contamination)"],
    trick: "AFP negative = Seminoma | Inguinal = I for Important/Indispensable",
    images: [
      "https://cdn.orris.care/cdss_images/fd66c724db2413f301ea279bf8a6ca0e60c8ec36ffcf0823d5379da4cdedaad3.png"
    ]
  },
  {
    title: "15. Teratoma",
    type: "Germ cell tumour — all 3 germ layers",
    gross: "Mature (dermoid): cystic, contains hair/teeth/sebum; Immature: solid, necrotic, aggressive",
    micro: "Ectodermal (skin, neural), Mesodermal (cartilage, muscle), Endodermal (gut, respiratory epithelium)",
    key: ["Mature cystic teratoma = dermoid cyst of ovary (benign)",
          "Testicular teratoma in adults = always malignant (even if mature)",
          "Sacrococcygeal teratoma = most common solid neonatal tumour",
          "4 T's of anterior mediastinum: Thymoma, Teratoma, Thyroid, Terrible lymphoma"],
    trick: "Tera = monster (all cell types from 3 layers) | 4T's for anterior mediastinum",
    images: []
  },
  {
    title: "16. Carcinoma Breast",
    type: "Invasive Ductal Carcinoma (IDC) — 75-80%",
    gross: "Scirrhous (hard, gritty, irregular) = most common; stellate margins; skin tethering / peau d'orange",
    micro: "Malignant ductal cells in cords/nests; desmoplastic stroma; lymphovascular invasion",
    key: ["Peau d'orange = dermal lymphatic obstruction (NOT lymph node obstruction)",
          "T4d = Inflammatory Ca = dermal lymphatics emboli; neoadjuvant chemo first",
          "BRCA1 = chr 17q (triple-neg); BRCA2 = chr 13q (male breast Ca)",
          "ER+/PR+ → Tamoxifen/AI | HER2+ → Trastuzumab | TN → Chemo only"],
    trick: "BRCA1=17 (one-seven); BRCA2=13 (thir-teen) | T4d = d for Dermal",
    images: []
  },
  {
    title: "17. Thyroid Swelling",
    type: "Papillary Thyroid Carcinoma (most common, 80%)",
    gross: "Papillary Ca: ill-defined, hard, calcified, non-encapsulated; cut surface shows papillary projections",
    micro: "Orphan Annie eye nuclei (empty/clear); nuclear grooves; psammoma bodies; papillary architecture",
    key: ["Orphan Annie nuclei = ground-glass nuclear clearing = pathognomonic papillary Ca",
          "Psammoma bodies: papillary Ca, meningioma, serous ovarian Ca, mesothelioma",
          "Medullary Ca: calcitonin marker + amyloid deposits + MEN2A/2B",
          "Lateral aberrant thyroid = metastatic papillary Ca in lymph node"],
    trick: "Papillary = POOF: Psammoma bodies, Orphan Annie, Orphan (nodal mets), Frequent lymphatics",
    images: [
      "https://cdn.orris.care/cdss_images/79fe551637d4d859a72c00f9ed7c6a0cfa16a69b7e40af5c68a5498a63b6d3fe.png",
      "https://cdn.orris.care/cdss_images/1b3201bef82c838b9a284c77c33f247168262cb4d7a57d58706722424d8f7e0a.png"
    ]
  },
  {
    title: "18. Renal Cell Carcinoma (RCC)",
    type: "Clear cell RCC (75%) — Grawitz tumour / Hypernephroma",
    gross: "Upper pole; golden-yellow (lipid-rich); variegated with haemorrhage and necrosis; pseudo-capsule",
    micro: "Clear cells (lipid/glycogen washed out in processing); nested/alveolar pattern; delicate vasculature",
    key: ["Triad: Haematuria + Flank pain + Mass (only 10% present with all 3)",
          "Sudden LEFT varicocele in adult male → rule out RCC immediately",
          "Stauffer syndrome: non-metastatic hepatic dysfunction → resolves after nephrectomy",
          "VHL gene (chr 3p25); chemo-resistant + radio-resistant → targeted therapy (sunitinib)"],
    trick: "GOLDEN YELLOW = Clear cell RCC | Sudden left varicocele → RCC",
    images: [
      "https://cdn.orris.care/cdss_images/f1e65eb6e5675904e1285b4163471d0035ac11a06fab7e0dc9eded000b1bfe02.png"
    ]
  },
  {
    title: "19. Wilms' Tumour (Nephroblastoma)",
    type: "Embryonal renal tumour of childhood",
    gross: "Large, soft, tan-grey mass replacing renal parenchyma; pseudocapsule; cystic areas; haemorrhage",
    micro: "Triphasic: Blastemal (small blue cells) + Stromal + Epithelial (primitive tubules); anaplasia = poor prognosis",
    key: ["Does NOT cross midline (unlike neuroblastoma which does)",
          "WAGR syndrome: Wilms + Aniridia + GU anomalies + Retardation (WT1, chr 11p13)",
          "Beckwith-Wiedemann: macroglossia + organomegaly + hemihypertrophy (WT2, chr 11p15)",
          "NWTSG: surgery first → VA chemo (vincristine + actinomycin D)"],
    trick: "Wilms STAYS on its side; Neuroblastoma CROSSES | BSE = Blast, Stroma, Epithelium",
    images: [
      "https://cdn.orris.care/cdss_images/084a80f25098e68c190c5fae917e65501b6886475080ec0939eb8402601aaaa3.png",
      "https://cdn.orris.care/cdss_images/a2528f381c5f44acf8c297f88b778e8116e6e038ea1c4a603f79b2dee9b5a990.png"
    ]
  }
];

// ── collect all image URLs and pre-fetch ──────────────────────────────────────
const allUrls = [...new Set(specimens.flatMap(s => s.images))];
console.log(`Fetching ${allUrls.length} images...`);
const fetched = allUrls.length > 0 ? fetchImages(allUrls) : [];
const imgMap = {};
fetched.forEach(f => { imgMap[f.url] = f; });
const successCount = fetched.filter(f => !f.error && f.base64).length;
console.log(`Successfully fetched: ${successCount}/${allUrls.length}`);

// ── build presentation ────────────────────────────────────────────────────────
const pres = new pptxgen();
pres.layout = "LAYOUT_WIDE"; // 13.3" × 7.5"
pres.title = "General Surgery Specimens – PG Viva Guide";
pres.author = "PG Exam Prep";

// ── TITLE SLIDE ───────────────────────────────────────────────────────────────
{
  const sl = pres.addSlide();
  sl.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 13.3, h: 7.5, fill: { color: DEEP_NAVY } });
  // decorative stripe
  sl.addShape(pres.ShapeType.rect, { x: 0, y: 5.8, w: 13.3, h: 0.12, fill: { color: GOLD } });
  sl.addShape(pres.ShapeType.rect, { x: 0, y: 6.0, w: 13.3, h: 0.06, fill: { color: TEAL } });
  // title
  sl.addText("General Surgery Specimens", {
    x: 0.6, y: 1.2, w: 12.1, h: 1.2,
    fontSize: 42, bold: true, color: WHITE, fontFace: "Calibri",
    align: "center", charSpacing: 2
  });
  sl.addText("PG Final Year Exam — Viva Guide", {
    x: 0.6, y: 2.6, w: 12.1, h: 0.7,
    fontSize: 24, color: GOLD, fontFace: "Calibri",
    align: "center", italic: true
  });
  sl.addText("19 Essential Specimens with Gross & Microscopic Pathology", {
    x: 0.6, y: 3.5, w: 12.1, h: 0.55,
    fontSize: 18, color: LIGHT_GREY, fontFace: "Calibri", align: "center"
  });
  sl.addText([
    { text: "Gross  |  Microscopy  |  Key Points  |  FAQ  |  Memory Tricks", options: {} }
  ], {
    x: 0.6, y: 4.35, w: 12.1, h: 0.5,
    fontSize: 16, color: TEAL, fontFace: "Calibri", align: "center"
  });
  // specimen count badge
  sl.addShape(pres.ShapeType.roundRect, {
    x: 5.4, y: 5.2, w: 2.5, h: 0.8,
    fill: { color: GOLD }, rectRadius: 0.15, line: { color: GOLD }
  });
  sl.addText("19 Specimens", {
    x: 5.4, y: 5.2, w: 2.5, h: 0.8,
    fontSize: 18, bold: true, color: DEEP_NAVY, fontFace: "Calibri", align: "center", valign: "middle"
  });
}

// ── SPECIMEN SLIDES ───────────────────────────────────────────────────────────
specimens.forEach((spec, idx) => {
  const sl = pres.addSlide();

  // ---- background
  sl.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 13.3, h: 7.5, fill: { color: CREAM } });

  // ---- left column header band
  sl.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 13.3, h: 1.1, fill: { color: DEEP_NAVY } });
  // gold accent line under header
  sl.addShape(pres.ShapeType.rect, { x: 0, y: 1.1, w: 13.3, h: 0.07, fill: { color: GOLD } });

  // ---- title
  sl.addText(spec.title, {
    x: 0.25, y: 0.1, w: 8.5, h: 0.55,
    fontSize: 22, bold: true, color: WHITE, fontFace: "Calibri", margin: 0
  });
  sl.addText(spec.type, {
    x: 0.25, y: 0.6, w: 8.5, h: 0.42,
    fontSize: 13, color: GOLD, fontFace: "Calibri", italic: true, margin: 0
  });

  // ---- slide number badge
  sl.addShape(pres.ShapeType.roundRect, {
    x: 12.35, y: 0.15, w: 0.7, h: 0.7,
    fill: { color: GOLD }, rectRadius: 0.12, line: { color: GOLD }
  });
  sl.addText(`${idx + 1}`, {
    x: 12.35, y: 0.15, w: 0.7, h: 0.7,
    fontSize: 18, bold: true, color: DEEP_NAVY, fontFace: "Calibri", align: "center", valign: "middle"
  });

  // ---- CONTENT AREA  (decide layout based on image availability)
  const imgs = spec.images.filter(u => imgMap[u] && !imgMap[u].error && imgMap[u].base64);
  const hasImages = imgs.length > 0;

  // column widths
  const textX = 0.25;
  const textW = hasImages ? 7.8 : 12.8;
  const imgX  = 8.25;
  const imgW  = 4.8;

  // ---- Gross description block
  sl.addShape(pres.ShapeType.roundRect, {
    x: textX, y: 1.28, w: textW, h: 0.95,
    fill: { color: MID_BLUE }, line: { color: MID_BLUE }, rectRadius: 0.1
  });
  sl.addText([
    { text: "GROSS  ", options: { bold: true, color: GOLD, fontSize: 11 } },
    { text: spec.gross, options: { color: WHITE, fontSize: 11 } }
  ], { x: textX + 0.12, y: 1.3, w: textW - 0.25, h: 0.91, valign: "middle" });

  // ---- Microscopy block
  sl.addShape(pres.ShapeType.roundRect, {
    x: textX, y: 2.32, w: textW, h: 0.95,
    fill: { color: TEAL }, line: { color: TEAL }, rectRadius: 0.1
  });
  sl.addText([
    { text: "MICRO  ", options: { bold: true, color: GOLD, fontSize: 11 } },
    { text: spec.micro, options: { color: WHITE, fontSize: 11 } }
  ], { x: textX + 0.12, y: 2.34, w: textW - 0.25, h: 0.91, valign: "middle" });

  // ---- Key Points
  sl.addText("KEY POINTS", {
    x: textX, y: 3.38, w: 2.5, h: 0.32,
    fontSize: 11, bold: true, color: MID_BLUE, fontFace: "Calibri", margin: 0
  });
  const keyItems = spec.key.map((k, i) => ({
    text: k,
    options: { bullet: { type: "number", indent: 20 }, fontSize: 10.5, color: DARK_TEXT, breakLine: i < spec.key.length - 1 }
  }));
  sl.addText(keyItems, {
    x: textX, y: 3.72, w: textW, h: spec.key.length > 3 ? 1.55 : 1.25,
    fontFace: "Calibri"
  });

  // ---- Memory Trick box
  const trickY = 5.4;
  sl.addShape(pres.ShapeType.roundRect, {
    x: textX, y: trickY, w: textW, h: 0.78,
    fill: { color: "FFF3CD" }, line: { color: GOLD, pt: 1.5 }, rectRadius: 0.1
  });
  sl.addText([
    { text: "💡 TRICK  ", options: { bold: true, color: "7D4E00", fontSize: 11 } },
    { text: spec.trick, options: { color: DARK_TEXT, fontSize: 10.5 } }
  ], { x: textX + 0.12, y: trickY + 0.04, w: textW - 0.25, h: 0.72, valign: "middle" });

  // ---- Images
  if (hasImages) {
    const maxImgs = Math.min(imgs.length, 2);
    const singleH = maxImgs === 1 ? 5.0 : 2.4;
    const gap = 0.12;
    for (let i = 0; i < maxImgs; i++) {
      const iy = 1.28 + i * (singleH + gap);
      try {
        sl.addImage({
          data: imgMap[imgs[i]].base64,
          x: imgX, y: iy, w: imgW, h: singleH,
          sizing: { type: "contain", w: imgW, h: singleH }
        });
      } catch (e) {
        console.error(`Image placement error slide ${idx + 1}:`, e.message);
      }
    }
    // image label
    sl.addText("Textbook images — educational use", {
      x: imgX, y: 6.2, w: imgW, h: 0.28,
      fontSize: 7, color: "888888", fontFace: "Calibri", align: "center", italic: true
    });
  }

  // ---- footer rule + text
  sl.addShape(pres.ShapeType.rect, { x: 0, y: 7.18, w: 13.3, h: 0.03, fill: { color: MID_BLUE } });
  sl.addText("General Surgery Specimens — PG Final Year Viva Guide", {
    x: 0.25, y: 7.22, w: 10, h: 0.25,
    fontSize: 8, color: "888888", fontFace: "Calibri"
  });
  sl.addText(`${idx + 1} / 19`, {
    x: 12.3, y: 7.22, w: 0.8, h: 0.25,
    fontSize: 8, color: "888888", fontFace: "Calibri", align: "right"
  });
});

// ── SUMMARY / QUICK REFERENCE SLIDE ──────────────────────────────────────────
{
  const sl = pres.addSlide();
  sl.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 13.3, h: 7.5, fill: { color: DEEP_NAVY } });
  sl.addShape(pres.ShapeType.rect, { x: 0, y: 1.15, w: 13.3, h: 0.06, fill: { color: GOLD } });
  sl.addText("Quick Reference — All 19 Specimens", {
    x: 0.4, y: 0.18, w: 12.5, h: 0.85,
    fontSize: 26, bold: true, color: WHITE, fontFace: "Calibri", align: "center"
  });

  const summaryData = [
    ["Specimen", "Key Buzzword", "Don't Forget"],
    ["Ca Colon", "Apple core / Dukes", "Dukes never described Stage D"],
    ["Trichobezoar", "Rapunzel syndrome", "Young female, trichotillomania"],
    ["TB LN", "Collar-stud abscess", "Caseating granuloma + Langhans cells"],
    ["Hodgkin's LN", "Owl-eye RS cell", "CD15+, CD30+; ABVD chemo"],
    ["GB Stone", "5 F's / Rigler's triad", "Brown duct, Black bag"],
    ["Liver Mets", "Umbilicated nodules", "Colorectal = most common primary"],
    ["Intestinal Worms", "Biliary ascariasis", "Piperazine in obstruction"],
    ["Meckel's", "Rule of 2s", "Painless rectal bleeding in child"],
    ["TB Intestine", "Transverse ulcers", "Ileocecal; TB vs Crohn's table"],
    ["Hydatid Cyst", "Water lily sign", "PAIR + Albendazole"],
    ["Ca Stomach", "Virchow/Krukenberg", "Linitis plastica = leather bottle"],
    ["Amoebic Abscess", "Anchovy sauce", "Metro then Diloxanide"],
    ["Polycystic Kidney", "Berry aneurysm", "PKD1 chr 16, PKD2 chr 4"],
    ["Seminoma", "AFP always normal", "Inguinal orchidectomy only"],
    ["Teratoma", "3 germ layers", "4T's of anterior mediastinum"],
    ["Ca Breast", "Peau d'orange", "ER/PR/HER2 drives treatment"],
    ["Thyroid", "Orphan Annie nuclei", "Lateral aberrant = metastasis"],
    ["RCC", "Golden yellow", "Sudden L varicocele → RCC"],
    ["Wilms' Tumour", "Does not cross midline", "Triphasic histology; WAGR"]
  ];

  const rows = summaryData.map((row, ri) => row.map((cell, ci) => ({
    text: cell,
    options: {
      bold: ri === 0,
      color: ri === 0 ? DEEP_NAVY : (ri % 2 === 0 ? DARK_TEXT : "2C3E50"),
      fontSize: ri === 0 ? 10 : 9,
      align: ci === 0 ? "left" : "left"
    }
  })));

  sl.addTable(rows, {
    x: 0.3, y: 1.3, w: 12.7,
    colW: [2.2, 2.8, 7.7],
    rowH: 0.29,
    fill: { color: WHITE },
    border: { type: "none" },
    fontFace: "Calibri",
    autoPage: false
  });
}

// ── WRITE FILE ────────────────────────────────────────────────────────────────
const outPath = "/home/daytona/workspace/surgery-specimens-ppt/Surgery_Specimens_PG_Viva.pptx";
pres.writeFile({ fileName: outPath })
  .then(() => console.log("✅ PPTX written to:", outPath))
  .catch(e => { console.error("Write error:", e); process.exit(1); });

Successfully replaced 1 instance(s) of the string in '/home/daytona/workspace/surgery-specimens-ppt/build.js'