const {
  Document, Packer, Paragraph, TextRun, Table, TableRow, TableCell,
  HeadingLevel, AlignmentType, BorderStyle, WidthType, VerticalAlign,
  ShadingType
} = require('docx');
const fs = require('fs');

// --- Helpers ---
function heading1(text) {
  return new Paragraph({
    text,
    heading: HeadingLevel.HEADING_1,
    spacing: { before: 300, after: 120 },
  });
}

function heading2(text) {
  return new Paragraph({
    text,
    heading: HeadingLevel.HEADING_2,
    spacing: { before: 200, after: 80 },
  });
}

function body(text, bold = false) {
  return new Paragraph({
    children: [new TextRun({ text, bold, size: 22 })],
    spacing: { after: 80 },
  });
}

function labelValue(label, value) {
  return new Paragraph({
    children: [
      new TextRun({ text: label + ': ', bold: true, size: 22 }),
      new TextRun({ text: value, size: 22 }),
    ],
    spacing: { after: 80 },
  });
}

function emptyLine() {
  return new Paragraph({ text: '', spacing: { after: 80 } });
}

// Table helper: array of [label, value] pairs
function infoTable(rows) {
  const tableRows = rows.map(([label, value]) =>
    new TableRow({
      children: [
        new TableCell({
          children: [new Paragraph({
            children: [new TextRun({ text: label, bold: true, size: 22 })],
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          width: { size: 35, type: WidthType.PERCENTAGE },
          shading: { type: ShadingType.CLEAR, fill: 'E8F0FE' },
          margins: { top: 80, bottom: 80, left: 120, right: 120 },
        }),
        new TableCell({
          children: [new Paragraph({
            children: [new TextRun({ text: value, size: 22 })],
          })],
          width: { size: 65, type: WidthType.PERCENTAGE },
          margins: { top: 80, bottom: 80, left: 120, right: 120 },
        }),
      ],
    })
  );

  return new Table({
    rows: tableRows,
    width: { size: 100, type: WidthType.PERCENTAGE },
    borders: {
      top: { style: BorderStyle.SINGLE, size: 1, color: 'AAAAAA' },
      bottom: { style: BorderStyle.SINGLE, size: 1, color: 'AAAAAA' },
      left: { style: BorderStyle.SINGLE, size: 1, color: 'AAAAAA' },
      right: { style: BorderStyle.SINGLE, size: 1, color: 'AAAAAA' },
      insideH: { style: BorderStyle.SINGLE, size: 1, color: 'CCCCCC' },
      insideV: { style: BorderStyle.SINGLE, size: 1, color: 'CCCCCC' },
    },
  });
}

// --- Document ---
const doc = new Document({
  styles: {
    paragraphStyles: [
      {
        id: 'Heading1',
        name: 'Heading 1',
        basedOn: 'Normal',
        next: 'Normal',
        run: { bold: true, size: 28, color: '1A3A6B' },
        paragraph: { spacing: { before: 300, after: 120 } },
      },
      {
        id: 'Heading2',
        name: 'Heading 2',
        basedOn: 'Normal',
        next: 'Normal',
        run: { bold: true, size: 24, color: '2E6DA4' },
        paragraph: { spacing: { before: 200, after: 80 } },
      },
    ],
  },
  sections: [
    {
      properties: {
        page: {
          margin: { top: 1000, bottom: 1000, left: 1200, right: 1200 },
        },
      },
      children: [
        // ── HEADER BLOCK ──
        new Paragraph({
          children: [new TextRun({ text: 'OSCAR MEDICAL CENTER', bold: true, size: 36, color: '1A3A6B' })],
          alignment: AlignmentType.CENTER,
          spacing: { after: 60 },
        }),
        new Paragraph({
          children: [new TextRun({ text: 'आम आदमी का अस्पताल', size: 22, color: '555555' })],
          alignment: AlignmentType.CENTER,
          spacing: { after: 60 },
        }),
        new Paragraph({
          children: [new TextRun({ text: 'Sector-25, Panchkula  |  Tel: 90538-93331', size: 20, color: '555555' })],
          alignment: AlignmentType.CENTER,
          spacing: { after: 200 },
        }),

        // Title
        new Paragraph({
          children: [new TextRun({ text: 'SURGICAL PROCEDURE SUMMARY', bold: true, size: 30, color: 'FFFFFF' })],
          alignment: AlignmentType.CENTER,
          shading: { type: ShadingType.CLEAR, fill: '1A3A6B' },
          spacing: { before: 100, after: 100 },
          indent: { left: 0, right: 0 },
        }),

        emptyLine(),

        // ── SECTION 1: Patient Details ──
        heading1('1. Patient Information'),
        infoTable([
          ['Patient Name', 'Mr. Rohit'],
          ['UHID No.', '5008'],
          ['IP No.', '883'],
          ['Age', '29 Years'],
          ['Sex', 'Male'],
          ['Blood Group', 'Not recorded'],
          ['Anesthesia Type', 'Brachial Block'],
        ]),

        emptyLine(),

        // ── SECTION 2: Operative Details ──
        heading1('2. Operative Details'),
        infoTable([
          ['Date of Operation', '19 July 2026'],
          ['Pre-operative Diagnosis', 'Fracture Radial Head (Left) - Closed'],
          ['Operation Proposed', 'Radial Head Excision + Arthrolysis of Elbow'],
        ]),

        emptyLine(),

        // ── SECTION 3: Procedure Description ──
        heading1('3. Operative Procedure'),
        body(
          'A lateral S-shaped skin incision was made for a lateral approach to the left elbow. ' +
          'Subcutaneous dissection was then carried out between the tissue planes. ' +
          'Small comminuted bone fragments were identified and excised. A partial radial head excision was performed. ' +
          'The radius was found to be stable following excision. ' +
          'Arthrolysis was performed, which resulted in an increased range of motion (ROM) at the elbow. ' +
          'The wound was thoroughly washed and closed in layers. An ASD (Antiseptic Sterile Dressing) was applied.'
        ),

        emptyLine(),

        // ── SECTION 4: Intraoperative Findings ──
        heading1('4. Intraoperative Findings'),
        body('- Comminuted fracture fragments at the left radial head.'),
        body('- Radius found stable after partial radial head excision.'),
        body('- Elbow range of motion improved after arthrolysis.'),
        body('- Post-operative distal neurovascular status: Intact (no vascular or nerve injury).'),

        emptyLine(),

        // ── SECTION 5: Surgical Approach ──
        heading1('5. Surgical Approach & Technique'),
        labelValue('Approach', 'Lateral (Kocher\'s approach) to the elbow'),
        labelValue('Incision', 'Lateral S-shaped skin incision'),
        labelValue('Key Procedure', 'Partial Radial Head Excision'),
        labelValue('Adjunct Procedure', 'Arthrolysis (surgical release to improve ROM)'),
        labelValue('Wound Closure', 'Closed in layers with ASD dressing applied'),

        emptyLine(),

        // ── SECTION 6: Surgical Team ──
        heading1('6. Surgical Team'),
        infoTable([
          ['Surgeon', 'Dr. Aashrya Mali'],
          ['Assistant Surgeon', 'Not recorded'],
          ['Anesthesiologist', 'Dr. Megha'],
          ['Scrub Nurse', 'Happy'],
        ]),

        emptyLine(),

        // ── SECTION 7: Post-operative Status ──
        heading1('7. Post-operative Status'),
        body(
          'Post-operatively, the distal neurovascular status of the left upper limb was assessed and found to be intact, ' +
          'confirming no injury to the distal nerves or blood vessels during the procedure.'
        ),

        emptyLine(),

        // ── SECTION 8: Clinical Notes ──
        heading1('8. Clinical Notes'),
        body(
          'Radial head fractures are among the most common elbow fractures in adults. ' +
          'Comminuted radial head fractures that are not amenable to fixation are typically managed with radial head excision. ' +
          'Arthrolysis is performed concurrently when elbow stiffness (limited ROM) is present intraoperatively. ' +
          'A brachial block (regional anesthesia) was used, which is standard for upper limb procedures and avoids general anesthesia risks.'
        ),

        emptyLine(),

        // Footer note
        new Paragraph({
          children: [
            new TextRun({ text: 'Document generated from operation notes dated 19/07/2026  |  Oscar Medical Center, Panchkula', size: 18, color: '888888', italics: true }),
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          spacing: { before: 400 },
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    },
  ],
});

Packer.toBuffer(doc).then((buffer) => {
  fs.writeFileSync('/home/daytona/workspace/surgical-summary/Surgical_Summary_Mr_Rohit.docx', buffer);
  console.log('Document created successfully.');
});