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

// ─── Fetch images as base64 ──────────────────────────────────────────────────
const imageUrls = {
  title:       "https://upload.wikimedia.org/wikipedia/commons/7/70/1113_The_Diaphragm.jpg",
  diaphSuperior: "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_8ab8f155a63410adca459d09626372fa974bb3339d44cec0d0e62f0656daf25f.jpg",
  diaphInferior: "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_acaebe8de7739161e48420770bf6aa8c88635dea40c460f7db0a8ea9ab27a8b7.jpg",
  diaphParts:  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_563a8c4d6a1ebadde47973c57dae8b3a97d5082ef06f10d741ba043ce4806116.jpg",
  diaphOrigin: "https://upload.wikimedia.org/wikipedia/commons/f/fa/Diaphragma.jpg",
  centralTendon: "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_2d936a66e71d007eb2ec287f231de65e3b4c6101a059fed9186209291784cc16.jpg",
  openings:    "https://admin.anatomy.app/Media/images/respiratory-system-thorax-muscles-diaphragm-openings_20250618044507_large.jpg",
  bloodSupply: "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_83760d4f3c0a8b659bdeff0c885120a7ec543953d9ba3522134461021bd07a7e.jpg",
  nerveSupply: "https://wikism.org/w/images/b/b2/Illustration_of_the_phrenic_nerve.jpg",
  embryology:  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_4fdedb94a711fd5a434b4955eb59519f4cfa958672b53d2ec2615636f34245d9.jpg",
  respiration: "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_9f55543b972bfa7bf92d56129175cc376ab6c4766ac02aeeda18f3964b1fc099.jpg",
  relations:   "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_4a7bce2c816beb466dddd06b2399918f780504af8fe3132f60347bca7d71764a.jpg",
  histology:   "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_563a8c4d6a1ebadde47973c57dae8b3a97d5082ef06f10d741ba043ce4806116.jpg",
  clinicalXray:"https://cdn.orris.care/cdss_images/pmc_clinical_VQA_feaf1342ee851ba168b7fa5655ad01419962dbf2b6a9e8b4babd9175deea483a.jpg",
  imaging:     "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_4a7bce2c816beb466dddd06b2399918f780504af8fe3132f60347bca7d71764a.jpg",
  herniaTypes: "https://cdn.orris.care/cdss_images/BAILY_1760530385228_a92e5653-8d3e-4ea0-a8e4-0d3ebd91ea8e.png",
};

console.log("Fetching images...");
let images = {};
try {
  const urlList = Object.values(imageUrls).map(u => `"${u}"`).join(" ");
  const result = execSync(
    `node /home/daytona/skills/shared/scripts/fetch_images.js ${urlList}`,
    { maxBuffer: 100 * 1024 * 1024, timeout: 120000 }
  ).toString();
  const fetched = JSON.parse(result);
  const keys = Object.keys(imageUrls);
  keys.forEach((k, i) => {
    if (fetched[i] && !fetched[i].error && fetched[i].base64) {
      images[k] = fetched[i].base64;
    } else {
      console.log(`  WARN: failed to fetch image for key="${k}": ${fetched[i]?.error}`);
      images[k] = null;
    }
  });
} catch (e) {
  console.error("Image fetch error:", e.message);
}
console.log("Images fetched. Building presentation...");

// ─── Color Palette ────────────────────────────────────────────────────────────
const C = {
  navyBg:     "0D2B55",   // deep navy – slide background
  headerBg:   "1B4F8A",   // royal blue – title bars
  accentBlue: "2980B9",   // mid blue – accents / bullets
  lightBlue:  "D6E8F7",   // pale blue – side panel / highlights
  white:      "FFFFFF",
  offWhite:   "F0F6FC",
  gold:       "F5A623",   // accent / underline
  textDark:   "0A1E3A",   // body text on light bg
  subText:    "4A6FA5",
};

// ─── Helpers ─────────────────────────────────────────────────────────────────
function addBackground(slide, color = C.offWhite) {
  slide.background = { color: color };
}

function addHeader(slide, title, subtitle = null) {
  // Header bar
  slide.addShape("rect", { x: 0, y: 0, w: "100%", h: 1.15, fill: { color: C.headerBg } });
  // Gold accent line
  slide.addShape("rect", { x: 0, y: 1.15, w: "100%", h: 0.06, fill: { color: C.gold } });
  // Title text
  slide.addText(title, {
    x: 0.3, y: 0.08, w: 9.2, h: 0.72,
    fontSize: 26, bold: true, color: C.white, fontFace: "Calibri", align: "left",
    margin: 0,
  });
  if (subtitle) {
    slide.addText(subtitle, {
      x: 0.3, y: 0.80, w: 9.2, h: 0.35,
      fontSize: 13, color: C.lightBlue, fontFace: "Calibri", align: "left",
      margin: 0, italic: true,
    });
  }
}

function addFooter(slide) {
  slide.addShape("rect", { x: 0, y: 5.35, w: "100%", h: 0.275, fill: { color: C.headerBg } });
  slide.addText("Made by Darshan Benke", {
    x: 0.3, y: 5.36, w: 9.4, h: 0.25,
    fontSize: 9, color: C.lightBlue, fontFace: "Calibri", align: "center",
    margin: 0, italic: true,
  });
}

function bulletList(items, opts = {}) {
  return items.map((t, i) => ({
    text: t,
    options: { bullet: { type: "bullet" }, breakLine: i < items.length - 1, ...opts },
  }));
}

function addBulletBox(slide, items, x, y, w, h, titleText = null, fontSize = 13) {
  if (titleText) {
    slide.addText(titleText, {
      x, y, w, h: 0.35,
      fontSize: 12, bold: true, color: C.accentBlue, fontFace: "Calibri",
      margin: [2, 4, 2, 4],
    });
    y += 0.35;
    h -= 0.35;
  }
  slide.addShape("rect", { x, y, w, h, fill: { color: C.lightBlue }, line: { color: C.accentBlue, pt: 1 } });
  slide.addText(bulletList(items, { color: C.textDark, fontFace: "Calibri", fontSize }), {
    x: x + 0.08, y: y + 0.05, w: w - 0.16, h: h - 0.1,
    fontSize, color: C.textDark, fontFace: "Calibri", valign: "top",
    margin: [4, 4, 4, 8],
  });
}

function addImage(slide, key, x, y, w, h) {
  if (images[key]) {
    try {
      slide.addImage({ data: images[key], x, y, w, h, sizing: { type: "contain", w, h } });
    } catch (e) {
      console.log(`Image render warning [${key}]:`, e.message);
    }
  }
}

function addImageWithBorder(slide, key, x, y, w, h, label = null) {
  // Border box
  slide.addShape("rect", { x: x - 0.05, y: y - 0.05, w: w + 0.1, h: h + (label ? 0.35 : 0.1),
    fill: { color: C.white }, line: { color: C.accentBlue, pt: 1.5 } });
  addImage(slide, key, x, y, w, h);
  if (label) {
    slide.addText(label, {
      x: x - 0.05, y: y + h, w: w + 0.1, h: 0.3,
      fontSize: 9, color: C.subText, fontFace: "Calibri", align: "center", italic: true,
      margin: 0,
    });
  }
}

// ─── Presentation ─────────────────────────────────────────────────────────────
const pres = new pptxgen();
pres.layout = "LAYOUT_16x9";
pres.title = "Diaphragm Anatomy";
pres.author = "Darshan Benke";

// ════════════════════════════════════════════════════════════════════════
// SLIDE 1 – Title
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  // Full navy background
  s.background = { color: C.navyBg };

  // Left decorative stripe
  s.addShape("rect", { x: 0, y: 0, w: 0.18, h: "100%", fill: { color: C.gold } });

  // Title block
  s.addText("DIAPHRAGM ANATOMY", {
    x: 0.55, y: 0.55, w: 5.8, h: 0.9,
    fontSize: 38, bold: true, color: C.white, fontFace: "Calibri",
    charSpacing: 2,
  });
  s.addShape("rect", { x: 0.55, y: 1.45, w: 5.8, h: 0.05, fill: { color: C.gold } });
  s.addText("Structure, Attachments, Openings & Clinical Importance", {
    x: 0.55, y: 1.52, w: 5.8, h: 0.5,
    fontSize: 16, italic: true, color: C.lightBlue, fontFace: "Calibri",
  });
  s.addText("For MBBS Students  |  Gross Anatomy", {
    x: 0.55, y: 2.12, w: 5.8, h: 0.4,
    fontSize: 13, color: C.gold, fontFace: "Calibri",
  });

  // Right image panel
  s.addShape("rect", { x: 6.5, y: 0.3, w: 3.2, h: 4.6, fill: { color: C.headerBg }, line: { color: C.gold, pt: 2 } });
  addImage(s, "title", 6.55, 0.35, 3.1, 4.5);

  // Caption under image
  s.addText("OpenStax Anatomy & Physiology", {
    x: 6.5, y: 4.85, w: 3.2, h: 0.25,
    fontSize: 8, color: C.subText, fontFace: "Calibri", align: "center", italic: true,
  });

  // Bottom info bar
  s.addShape("rect", { x: 0, y: 5.1, w: "100%", h: 0.525, fill: { color: C.headerBg } });
  s.addText("Gray's Anatomy  •  Netter Atlas  •  Snell Clinical Anatomy  |  Made by Darshan Benke", {
    x: 0.3, y: 5.1, w: 9.4, h: 0.525,
    fontSize: 10, color: C.lightBlue, fontFace: "Calibri", align: "center", italic: true, valign: "middle",
  });
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 2 – Introduction
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Introduction to the Diaphragm");

  addBulletBox(s, [
    "Dome-shaped musculotendinous partition",
    "Separates thoracic cavity (superior) from abdominal cavity (inferior)",
    "Formed by skeletal muscle fibres + central aponeurotic tendon",
    "Primary muscle of respiration – responsible for ~80% of tidal breathing",
    "Asymmetric: right dome higher (T8/9) due to liver; left dome at T9/10",
    "Superior surface = floor of thoracic cavity; inferior surface = roof of abdominal cavity",
    "Innervated exclusively (motor) by phrenic nerve (C3, C4, C5)",
  ], 0.3, 1.28, 5.8, 3.85, null, 12.5);

  addImageWithBorder(s, "relations", 6.25, 1.28, 3.45, 3.8, "CT: Diaphragm separating cavities");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 3 – Parts of Diaphragm
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Parts of the Diaphragm");

  // Four labelled info boxes
  const parts = [
    { title: "① Sternal Part", items: ["Two small slips", "Arise from posterior xiphoid process", "Narrowest portion of diaphragm"] },
    { title: "② Costal Part", items: ["Six slips from lower 6 ribs & costal cartilages", "Largest portion", "Interdigitates with transversus abdominis"] },
    { title: "③ Lumbar Part", items: ["Two crura (right & left)", "Right crus: L1–L3 vertebral bodies", "Left crus: L1–L2 vertebral bodies", "Median & medial arcuate ligaments"] },
    { title: "④ Central Tendon", items: ["Trifoliate (trefoil) aponeurosis", "No bony insertion – fibres converge here", "Fused superiorly with fibrous pericardium", "Contains caval opening (T8)"] },
  ];

  const boxW = 2.2, boxH = 1.75;
  const xs = [0.25, 2.55, 4.85, 7.15];
  parts.forEach((p, i) => {
    s.addShape("rect", { x: xs[i], y: 1.28, w: boxW, h: boxH, fill: { color: C.headerBg }, line: { color: C.gold, pt: 1.5 } });
    s.addText(p.title, { x: xs[i] + 0.08, y: 1.3, w: boxW - 0.16, h: 0.32,
      fontSize: 11.5, bold: true, color: C.gold, fontFace: "Calibri", margin: 0 });
    s.addText(bulletList(p.items, { color: C.white, fontSize: 10.5, fontFace: "Calibri" }), {
      x: xs[i] + 0.08, y: 1.62, w: boxW - 0.16, h: boxH - 0.36,
      fontSize: 10.5, color: C.white, fontFace: "Calibri", valign: "top", margin: [2, 2, 2, 6],
    });
  });

  addImageWithBorder(s, "diaphSuperior", 0.25, 3.15, 4.6, 1.9, "Superior view – sternal, costal & lumbar parts");
  addImageWithBorder(s, "diaphParts", 4.95, 3.15, 4.75, 1.9, "Gross specimen – central tendon visible");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 4 – Origin and Attachments
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Origin & Attachments of the Diaphragm");

  addBulletBox(s, [
    "Sternal: Posterior surface of xiphoid process (two muscular slips)",
    "Costal: Inner surfaces of lower 6 ribs & their costal cartilages (ribs 7–12)",
    "Vertebral: Bodies of L1–L3 (right crus) and L1–L2 (left crus)",
    "Median arcuate ligament: Crosses anterior aorta at T12",
    "Medial arcuate ligament: Over psoas major (L1 transverse process → L1 body)",
    "Lateral arcuate ligament: Over quadratus lumborum (rib 12 → L1 transverse process)",
    "All fibres converge centrally → Insert into CENTRAL TENDON",
  ], 0.3, 1.28, 5.5, 3.85, "Peripheral Attachments", 12);

  addImageWithBorder(s, "diaphOrigin", 5.95, 1.28, 3.75, 3.8, "Gray's Anatomy: Diaphragm attachments");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 5 – Central Tendon
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Central Tendon");

  // Left info panel
  addBulletBox(s, [
    "Trifoliate (trefoil / clover-leaf) shaped fibrous aponeurosis",
    "Located near centre of diaphragm but slightly anterior",
    "Three leaflets: anterior, right lateral & left lateral",
    "Right leaflet is largest – supports the liver",
    "No bony attachment – all muscle fibres converge here",
    "Fused superiorly with the fibrous pericardium of the heart",
    "IVC passes through central tendon at T8",
    "Relatively fixed during respiration; phrenic centres terminate here",
  ], 0.3, 1.28, 5.3, 3.85, "Key Features", 12.5);

  addImageWithBorder(s, "centralTendon", 5.75, 1.28, 3.95, 3.8, "Surgical anatomy: central tendon & phrenic nerves");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 6 – Openings of Diaphragm
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Openings of the Diaphragm", "Mnemonic: I8 (IVC – 8 letters), OEsophagus (10 letters), AOrtic (12 letters)");

  // Three coloured cards
  const oData = [
    {
      level: "T8", name: "Caval Opening",
      loc: "Central tendon – right of median plane",
      pass: ["Inferior Vena Cava (IVC)", "Right phrenic nerve"],
      color: "1A6B3C",
    },
    {
      level: "T10", name: "Esophageal Hiatus",
      loc: "Muscular part – right crus surrounds it",
      pass: ["Esophagus", "Left & Right vagus nerves", "Esophageal branches of left gastric vessels"],
      color: C.headerBg,
    },
    {
      level: "T12", name: "Aortic Hiatus",
      loc: "Behind diaphragm – between two crura",
      pass: ["Descending aorta", "Thoracic duct", "Azygos vein (sometimes)"],
      color: "7B1A1A",
    },
  ];

  const cardW = 2.9, cardH = 2.6;
  const xs = [0.25, 3.3, 6.35];
  oData.forEach((o, i) => {
    s.addShape("rect", { x: xs[i], y: 1.28, w: cardW, h: cardH, fill: { color: o.color }, line: { color: C.gold, pt: 1.5 } });
    s.addText(`T${o.level.replace("T","")}`, { x: xs[i] + 0.1, y: 1.3, w: cardW - 0.2, h: 0.42,
      fontSize: 22, bold: true, color: C.gold, fontFace: "Calibri" });
    s.addText(o.name, { x: xs[i] + 0.1, y: 1.72, w: cardW - 0.2, h: 0.32,
      fontSize: 13, bold: true, color: C.white, fontFace: "Calibri" });
    s.addShape("rect", { x: xs[i] + 0.1, y: 2.04, w: cardW - 0.2, h: 0.03, fill: { color: C.gold } });
    s.addText(`📍 ${o.loc}`, { x: xs[i] + 0.1, y: 2.08, w: cardW - 0.2, h: 0.32,
      fontSize: 10, italic: true, color: C.lightBlue, fontFace: "Calibri" });
    s.addText("Transmits:", { x: xs[i] + 0.1, y: 2.42, w: cardW - 0.2, h: 0.22,
      fontSize: 10, bold: true, color: C.gold, fontFace: "Calibri" });
    s.addText(bulletList(o.pass, { color: C.white, fontSize: 10 }), {
      x: xs[i] + 0.1, y: 2.62, w: cardW - 0.2, h: 1.2,
      fontSize: 10, color: C.white, fontFace: "Calibri", valign: "top", margin: [2, 2, 2, 6],
    });
  });

  addImageWithBorder(s, "openings", 0.25, 4.0, 9.2, 1.1, "Diaphragm openings – inferior view");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 7 – Blood Supply
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Blood Supply of the Diaphragm");

  addBulletBox(s, [
    "ARTERIAL – Superior surface:",
    "  • Pericardiophrenic arteries (from internal thoracic arteries)",
    "  • Musculophrenic arteries (from internal thoracic arteries)",
    "  • Superior phrenic arteries (from thoracic aorta)",
    "ARTERIAL – Inferior surface:",
    "  • Inferior phrenic arteries (first branches of abdominal aorta)",
    "  • These are the dominant supply",
    "VENOUS DRAINAGE:",
    "  • Superior: pericardiophrenic & musculophrenic veins → internal thoracic veins",
    "  • Inferior: inferior phrenic veins → IVC (right) or left suprarenal/renal vein (left)",
  ], 0.3, 1.28, 5.5, 3.85, null, 11.5);

  addImageWithBorder(s, "bloodSupply", 5.95, 1.28, 3.75, 3.8, "Cadaveric dissection: inferior phrenic artery");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 8 – Nerve Supply
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Nerve Supply of the Diaphragm");

  // Left panel
  addBulletBox(s, [
    "MOTOR (Entire diaphragm):",
    "  • Phrenic nerve (C3, C4, C5) – bilateral",
    "  • Mnemonic: C3,4,5 keeps the diaphragm alive",
    "SENSORY – Central diaphragm:",
    "  • Phrenic nerve (C3, C4, C5) → referred pain to shoulder tip (C4 dermatome)",
    "SENSORY – Peripheral diaphragm:",
    "  • Lower 6 intercostal nerves (T7–T12)",
    "  • Subcostal nerve (T12)",
    "CLINICAL NOTE:",
    "  • Phrenic nerve palsy → paradoxical diaphragm movement",
    "  • Kehr's sign: diaphragmatic irritation → shoulder pain",
  ], 0.3, 1.28, 5.5, 3.85, null, 11.5);

  addImageWithBorder(s, "nerveSupply", 5.95, 1.28, 3.75, 3.8, "Phrenic nerve pathway – neck to diaphragm");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 9 – Embryological Development
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Embryological Development of the Diaphragm");

  // Flowchart style boxes
  const steps = [
    { num: "①", title: "Septum Transversum", detail: "Forms central tendon\nWeek 4: from mesoderm of cervical somites (C3-C5)\nExplains phrenic nerve origin", color: C.headerBg },
    { num: "②", title: "Pleuroperitoneal Membranes", detail: "Close pleuroperitoneal canals by week 6\nFailure → Bochdalek hernia\nLeft side closes later → more often affected", color: "1A6B3C" },
    { num: "③", title: "Dorsal Mesentery of Oesophagus", detail: "Forms the crura of diaphragm\nMedian portion between two crura\nAortic hiatus formed here", color: "7B1A1A" },
    { num: "④", title: "Muscular Ingrowth from Body Wall", detail: "Body wall myoblasts invade the membranous diaphragm\nForms peripheral muscular portion\nComplete by 8–10 weeks", color: "4A3080" },
  ];

  const bW = 2.2, bH = 1.75;
  const xs = [0.25, 2.55, 4.85, 7.15];
  steps.forEach((st, i) => {
    s.addShape("rect", { x: xs[i], y: 1.28, w: bW, h: bH, fill: { color: st.color }, line: { color: C.gold, pt: 1.5 } });
    s.addText(st.num + " " + st.title, { x: xs[i] + 0.08, y: 1.3, w: bW - 0.16, h: 0.38,
      fontSize: 11, bold: true, color: C.gold, fontFace: "Calibri", margin: 0 });
    s.addText(st.detail, { x: xs[i] + 0.08, y: 1.68, w: bW - 0.16, h: bH - 0.4,
      fontSize: 10, color: C.white, fontFace: "Calibri", valign: "top", margin: [2, 2, 2, 4] });
  });

  addImageWithBorder(s, "embryology", 0.25, 3.15, 5.5, 1.9, "CDH embryology: septum transversum & pleuroperitoneal folds");
  addBulletBox(s, [
    "Diaphragm develops from C3-C5 level → descends with phrenic nerve",
    "4 contributions fuse by wk 8-10; failure → congenital defects",
  ], 5.85, 3.15, 3.85, 1.9, "Key Points", 11);
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 10 – Movements During Respiration
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Movements During Respiration");

  // Two side-by-side cards
  const cards = [
    {
      title: "INSPIRATION", color: "1A6B3C",
      items: [
        "Diaphragm contracts → domes flatten & descend",
        "Vertical diameter of thorax increases by ~1.5 cm",
        "Intra-thoracic pressure decreases → air flows in",
        "Abdominal viscera pushed downward & forward",
        "Phrenic nerve (C3,4,5) fires → diaphragm contracts",
        "Contribution: ~75% of tidal volume in quiet breathing",
      ],
    },
    {
      title: "EXPIRATION (quiet)", color: "7B1A1A",
      items: [
        "Diaphragm relaxes → elastic recoil of lungs",
        "Domes rise back to resting position",
        "Thoracic volume decreases → air expelled",
        "Passive process in quiet breathing",
        "Forced expiration: abdominal muscles contract",
        "Internal intercostals assist in forced expiration",
      ],
    },
  ];

  cards.forEach((c, i) => {
    const x = 0.25 + i * 4.75;
    s.addShape("rect", { x, y: 1.28, w: 4.5, h: 0.38, fill: { color: c.color } });
    s.addText(c.title, { x, y: 1.28, w: 4.5, h: 0.38, fontSize: 14, bold: true,
      color: C.white, fontFace: "Calibri", align: "center", valign: "middle" });
    s.addShape("rect", { x, y: 1.66, w: 4.5, h: 1.85, fill: { color: C.lightBlue }, line: { color: c.color, pt: 1.5 } });
    s.addText(bulletList(c.items, { color: C.textDark, fontSize: 11 }), {
      x: x + 0.1, y: 1.7, w: 4.3, h: 1.78, fontSize: 11,
      color: C.textDark, fontFace: "Calibri", valign: "top", margin: [2, 2, 2, 6],
    });
  });

  addImageWithBorder(s, "respiration", 0.25, 3.6, 9.2, 1.55, "Respiratory mechanics: diaphragm movement, pump-handle & bucket-handle");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 11 – Relations of the Diaphragm
// ════════════════════════════════════════════════════════════════════════
{
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  addBackground(s);
  addHeader(s, "Relations of the Diaphragm");

  addBulletBox(s, [
    "SUPERIOR (Thoracic surface):",
    "  • Heart & fibrous pericardium (central tendon)",
    "  • Lungs & pleurae",
    "  • Phrenic nerves & pericardiophrenic vessels",
    "INFERIOR (Abdominal surface):",
    "  • Right lobe of liver (right dome) & left lobe (left dome)",
    "  • Stomach (left dome)",
    "  • Spleen (left dome)",
    "  • Right & left suprarenal glands",
    "  • Upper pole of both kidneys",
    "POSTERIOR:",
    "  • Abdominal aorta, thoracic duct, azygos vein",
    "  • Psoas major (under medial arcuate ligament)",
    "  • Quadratus lumborum (under lateral arcuate ligament)",
  ], 0.3, 1.28, 5.3, 3.85, null, 11);

  addImageWithBorder(s, "relations", 5.75, 1.28, 3.95, 3.8, "CT sagittal: liver & spleen under diaphragm");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 12 – Histology
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Histology of the Diaphragm");

  addBulletBox(s, [
    "SKELETAL MUSCLE FIBRES:",
    "  • Striated (voluntary) type – cross-striations visible",
    "  • Rich mitochondrial content → fatigue-resistant (Type I fibres dominant)",
    "  • High capillary density – reflects high O₂ demand",
    "  • Fibres radiate from periphery toward central tendon",
    "CENTRAL TENDON (Fibrous Component):",
    "  • Dense regular connective tissue (collagen type I)",
    "  • Interwoven collagen bundles – no muscle fibres",
    "  • Merges with fibrous pericardium superiorly",
    "NEUROMUSCULAR JUNCTIONS:",
    "  • En-plaque type (typical of skeletal muscle)",
    "  • Rich innervation from phrenic nerve terminals",
  ], 0.3, 1.28, 5.5, 3.85, null, 11.5);

  addImageWithBorder(s, "diaphParts", 5.95, 1.28, 3.75, 3.8, "Gross specimen: muscle periphery & central tendon");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 13 – Applied Anatomy
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Applied Anatomy – Clinical Correlations");

  const conditions = [
    { title: "Congenital Diaphragmatic Hernia (CDH)", detail: "Failure of pleuroperitoneal membrane to close\nBochdalek (posterolateral) 90% – mostly LEFT\nMorgagni (retrosternal) 10% – RIGHT\nPulmonary hypoplasia – key complication", color: "7B1A1A" },
    { title: "Hiatal Hernia", detail: "Sliding (type I): GEJ herniates above diaphragm\nParaesophageal (type II): fundus herniates\nMost common diaphragmatic hernia in adults\nPresents with GERD, dysphagia", color: C.headerBg },
    { title: "Eventration of Diaphragm", detail: "Failure of muscular development → fibrous sheet\nElevated hemidiaphragm on X-ray\nMay cause respiratory distress in neonates\nOften asymptomatic in adults", color: "1A6B3C" },
    { title: "Phrenic Nerve Palsy", detail: "Causes: malignancy, surgery, trauma, virus\nParadoxical movement on fluoroscopy / sniff test\nElevated hemidiaphragm on CXR\nBilateral → severe respiratory failure", color: "4A3080" },
  ];

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  const xs = [0.25, 2.55, 4.85, 7.15];
  conditions.forEach((c, i) => {
    s.addShape("rect", { x: xs[i], y: 1.28, w: bW, h: bH, fill: { color: c.color }, line: { color: C.gold, pt: 1.5 } });
    s.addText(c.title, { x: xs[i] + 0.08, y: 1.3, w: bW - 0.16, h: 0.38,
      fontSize: 10.5, bold: true, color: C.gold, fontFace: "Calibri", margin: 0 });
    s.addText(c.detail, { x: xs[i] + 0.08, y: 1.68, w: bW - 0.16, h: bH - 0.4,
      fontSize: 10, color: C.white, fontFace: "Calibri", valign: "top", margin: [2, 2, 2, 4] });
  });

  addImageWithBorder(s, "herniaTypes", 0.25, 3.15, 4.5, 1.9, "Hernia sites: Morgagni, Bochdalek, hiatal");
  addImageWithBorder(s, "clinicalXray", 4.85, 3.15, 4.85, 1.9, "CXR + CT: left-sided traumatic diaphragmatic hernia");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 14 – Imaging & Diagnosis
// ════════════════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  addBackground(s);
  addHeader(s, "Imaging & Diagnosis of the Diaphragm");

  const modalities = [
    { title: "X-Ray (CXR)", items: ["Domes visible as smooth convex arches", "Right dome at anterior 6th rib / T8-T9", "Left dome ~1.5 cm lower than right", "Normal thickness not assessable", "Elevated dome → paralysis/herniation"] },
    { title: "CT Scan", items: ["Gold standard for diaphragm anatomy", "Thin-slice coronal/sagittal reconstructions", "Identify hernia content, defect size", "CECT for vascular trauma", "Used for surgical planning"] },
    { title: "Ultrasound", items: ["Bedside assessment – ICU use", "Measure excursion & thickness", "M-mode: diaphragm kinetics", "Diagnose paradoxical movement", "Guide phrenic nerve blocks"] },
    { title: "MRI", items: ["Superior soft-tissue contrast", "Assess diaphragmatic invasion (tumour)", "Dynamic MRI: respiratory motion", "No radiation – paediatric advantage", "DW-MRI for liver/diaphragm pathology"] },
  ];

  const bW = 2.2;
  const xs = [0.25, 2.55, 4.85, 7.15];
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      color: C.gold, fontFace: "Calibri", align: "center", valign: "middle" });
    s.addShape("rect", { x: xs[i], y: 1.66, w: bW, h: 1.75, fill: { color: C.lightBlue }, line: { color: C.accentBlue, pt: 1 } });
    s.addText(bulletList(m.items, { color: C.textDark, fontSize: 10.5 }), {
      x: xs[i] + 0.1, y: 1.7, w: bW - 0.2, h: 1.68, fontSize: 10.5,
      color: C.textDark, fontFace: "Calibri", valign: "top", margin: [2, 2, 2, 6],
    });
  });

  addImageWithBorder(s, "imaging", 0.25, 3.52, 4.5, 1.63, "CT sagittal: normal diaphragm anatomy");
  addImageWithBorder(s, "clinicalXray", 4.85, 3.52, 4.85, 1.63, "CT + CXR: diaphragmatic hernia diagnosis");
  addFooter(s);
}

// ════════════════════════════════════════════════════════════════════════
// SLIDE 15 – Conclusion & References
// ════════════════════════════════════════════════════════════════════════
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  s.background = { color: C.navyBg };
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  // Title
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    fontSize: 26, bold: true, color: C.white, fontFace: "Calibri",
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    "Dome-shaped musculotendinous structure separating thorax & abdomen",
    "3 parts: sternal, costal, lumbar + central tendon (trifoliate)",
    "3 major openings: T8 (IVC), T10 (oesophagus), T12 (aorta)",
    "Sole motor innervation: phrenic nerve (C3,C4,C5)",
    "Blood supply: inferior phrenic aa. (dominant) + pericardiophrenic aa.",
    "Embryology: 4 components – septum transversum, pleuroperitoneal membranes, dorsal mesentery, body-wall muscle",
    "Primary muscle of respiration – 75% tidal volume",
    "Clinical: CDH (Bochdalek), hiatal hernia, eventration, phrenic palsy",
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    x: 0.38, y: 1.3, w: 5.3, h: 3.1, fontSize: 11,
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  // References box right
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    fontSize: 13, bold: true, color: C.gold, fontFace: "Calibri" });
  s.addText([
    { text: "Gray's Anatomy, 42nd Ed.", options: { bold: true, color: C.gold, breakLine: true } },
    { text: "  Standring S. (Ed.) Elsevier, 2020\n", options: { color: C.white, fontSize: 10.5, breakLine: true } },
    { text: "Netter's Atlas of Human Anatomy, 7th Ed.", options: { bold: true, color: C.gold, breakLine: true } },
    { text: "  Frank H. Netter. Elsevier, 2019\n", options: { color: C.white, fontSize: 10.5, breakLine: true } },
    { text: "Snell's Clinical Anatomy by Regions, 10th Ed.", options: { bold: true, color: C.gold, breakLine: true } },
    { text: "  Richard Snell. Wolters Kluwer, 2019\n", options: { color: C.white, fontSize: 10.5, breakLine: true } },
    { text: "Clinical Anatomy by Moore & Dalley, 8th Ed.", options: { bold: true, color: C.gold, breakLine: true } },
    { text: "  Moore KL et al. Wolters Kluwer, 2018\n", options: { color: C.white, fontSize: 10.5, breakLine: true } },
    { text: "OpenStax Anatomy & Physiology (CC-BY 4.0)", options: { bold: false, color: C.lightBlue, fontSize: 10, breakLine: true } },
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  // Thank you
  s.addText("🙏  THANK YOU", {
    x: 0.3, y: 4.6, w: 9.2, h: 0.5,
    fontSize: 22, bold: true, color: C.gold, fontFace: "Calibri", align: "center",
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  // Footer
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  s.addText("Made by Darshan Benke", {
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// ─── Write File ───────────────────────────────────────────────────────────────
const outputPath = "/home/daytona/workspace/diaphragm-anatomy/Diaphragm_Anatomy_MBBS.pptx";
pres.writeFile({ fileName: outputPath }).then(() => {
  console.log("✅  Presentation saved to:", outputPath);
}).catch(err => {
  console.error("❌  Error writing file:", err);
  process.exit(1);
});