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

// ── helpers ────────────────────────────────────────────────────────────────────
const bold = (text, size = 20) =>
  new TextRun({ text, bold: true, size, font: 'Times New Roman' });
const normal = (text, size = 20) =>
  new TextRun({ text, size, font: 'Times New Roman' });
const br = () => new TextRun({ break: 1 });

function para(runs, align = AlignmentType.LEFT, spacing = { before: 40, after: 40 }) {
  return new Paragraph({ children: Array.isArray(runs) ? runs : [runs], alignment: align, spacing });
}

function headerCell(text, shade = '1F4E79') {
  return new TableCell({
    shading: { fill: shade, type: ShadingType.CLEAR, color: shade },
    verticalAlign: VerticalAlign.CENTER,
    margins: { top: 80, bottom: 80, left: 100, right: 100 },
    children: [new Paragraph({
      alignment: AlignmentType.CENTER,
      spacing: { before: 40, after: 40 },
      children: [new TextRun({ text, bold: true, color: 'FFFFFF', size: 20, font: 'Times New Roman' })]
    })]
  });
}

function cell(children, shade = null, align = AlignmentType.LEFT) {
  return new TableCell({
    shading: shade ? { fill: shade, type: ShadingType.CLEAR, color: shade } : undefined,
    verticalAlign: VerticalAlign.TOP,
    margins: { top: 80, bottom: 80, left: 100, right: 100 },
    children: Array.isArray(children) ? children : [children]
  });
}

function dataRow(sn, objective, content, time, method, aid, evaluation, rowShade) {
  return new TableRow({
    children: [
      cell([para([normal(sn)], AlignmentType.CENTER)], rowShade),
      cell([para([normal(objective)])], rowShade),
      cell(content.map(line => para([normal(line)])), rowShade),
      cell([para([normal(time)], AlignmentType.CENTER)], rowShade),
      cell(method.map(line => para([normal(line)])), rowShade),
      cell(aid.map(line => para([normal(line)])), rowShade),
      cell([para([normal(evaluation)])], rowShade),
    ]
  });
}

// ── table rows ─────────────────────────────────────────────────────────────────
const LIGHT = 'EBF3FB';
const WHITE = 'FFFFFF';

const headerRow = new TableRow({
  tableHeader: true,
  children: [
    headerCell('SN'),
    headerCell('Specific Objectives'),
    headerCell('Contents'),
    headerCell('Time\n(min)'),
    headerCell('Teaching\nLearning\nMethod'),
    headerCell('Teaching\nAid'),
    headerCell('Evaluation'),
  ]
});

const rows = [
  // INTRO
  new TableRow({
    children: [
      cell([para([normal('')], AlignmentType.CENTER)], LIGHT),
      cell([para([normal('')])], LIGHT),
      cell([
        para([bold('• Introduction')]),
        para([normal('• Self introduction')]),
        para([normal('• Topic introduction')]),
        para([normal('• Objectives')]),
        para([normal('• Pre-test')]),
      ], LIGHT),
      cell([para([normal('2\n3\n2')], AlignmentType.CENTER)], LIGHT),
      cell([para([normal('—')])], LIGHT),
      cell([para([normal('—')])], LIGHT),
      cell([para([normal('—')])], LIGHT),
    ]
  }),

  // 1 - INTRODUCTION OF BED SORE
  dataRow(
    '1.',
    'At the end of the\nteaching, participants\nwill be able to:\nIntroduce bed sores',
    [
      '• Introduction / Definition:',
      '  A localized injury to the skin',
      '  and/or underlying tissue,',
      '  usually over a bony prominence,',
      '  resulting from sustained pressure',
      '  or pressure combined with shear.',
      '',
      '• Also called: decubitus ulcer,',
      '  pressure sore, pressure injury.',
      '',
      '• Prevalence: 7–9% in acute care;',
      '  11% in long-term care facilities.',
      '  Affects 3 million people annually.',
    ],
    '1',
    ['Interactive', 'lecture +', 'discussion'],
    ['—'],
    'What is a\nBed Sore?',
    WHITE
  ),

  // 2 - RISK FACTORS & CAUSES
  dataRow(
    '2.',
    'List risk factors\nand causes of\nbed sores',
    [
      '• Risk Factors & Causes:',
      '1. Immobility / reduced activity',
      '2. Spinal cord injury',
      '3. Dementia',
      '4. Parkinson disease',
      '5. Congestive heart failure',
      '6. Incontinence',
      '7. Poor nutrition (low protein,',
      '   hypoalbuminemia, low calorie)',
      '8. Anemia',
      '',
      '• Pathogenic factors:',
      '  - Pressure (main factor)',
      '  - Shearing forces',
      '  - Friction',
      '  - Moisture / moist skin',
    ],
    '3',
    ['Interactive', 'lecture +', 'discussion'],
    ['Flash card'],
    'What are the risk\nfactors and causes\nof Bed Sores?',
    LIGHT
  ),

  // 3 - SIGNS & SYMPTOMS
  dataRow(
    '3.',
    'List signs and\nsymptoms of\nbed sores',
    [
      '• Signs & Symptoms:',
      '1. Non-blanchable redness / erythema',
      '   over bony prominence',
      '2. Warmth, swelling, tenderness',
      '3. Shallow open ulcer — red/pink',
      '   wound bed',
      '4. Full-thickness tissue loss;',
      '   subcutaneous fat visible',
      '5. Exposed bone, tendon, or muscle',
      '   (severe cases)',
      '6. Slough or dark eschar on wound',
      '7. Purulent, foul-smelling discharge',
      '   (if infected)',
      '8. Fever, confusion (sepsis sign)',
    ],
    '2',
    ['Interactive', 'lecture +', 'discussion'],
    ['Chart paper'],
    'What are the signs\nand symptoms of\nBed Sores?',
    WHITE
  ),

  // 4 - DIAGNOSTIC CRITERIA + STAGING + COMMON SITES
  dataRow(
    '4.',
    'List diagnostic\ncriteria, staging\nand common sites\nof bed sores',
    [
      '• Assessment Tools:',
      '  - Braden Scale (6 subscales:',
      '    sensory perception, moisture,',
      '    activity, mobility, nutrition,',
      '    friction/shear)',
      '  - Waterlow Score',
      '  - Norton Risk Assessment Scale',
      '',
      '• NPUAP Staging:',
      '  Stage I   – Non-blanchable',
      '              erythema; intact skin',
      '  Stage II  – Partial-thickness skin',
      '              loss; shallow open ulcer',
      '  Stage III – Full-thickness tissue',
      '              loss; fat visible',
      '  Stage IV  – Full-thickness loss;',
      '              exposed bone/tendon',
      '  Unstageable – Covered by slough',
      '              or eschar',
      '  Deep Tissue – Purple/maroon intact',
      '              skin or blood blister',
      '',
      '• Common Sites:',
      '  Sacrum, Ischial tuberosity,',
      '  Greater trochanter, Heel,',
      '  Lateral/medial malleolus, Occiput',
    ],
    '3',
    ['Interactive', 'lecture +', 'discussion'],
    ['Chart paper', '/ Diagram'],
    'What is the\ndiagnostic criteria\nand staging of\nBed Sores?',
    LIGHT
  ),

  // 5 - PREVENTIVE MEASURES
  dataRow(
    '5.',
    'List preventive\nmeasures of\nbed sores',
    [
      '• Preventive Measures:',
      '1. Formal risk assessment on',
      '   admission (Braden Scale)',
      '2. Reposition every 2 hours',
      '   (high-risk); 2–4 times/day',
      '   (moderate risk)',
      '3. Position at 30° angle to surface;',
      '   avoid pressure on bony prominences',
      '4. Pressure-reducing devices:',
      '   alternating air mattress,',
      '   gel/water mattress',
      '5. Use lifting devices (not dragging)',
      '   during transfers to reduce friction',
      '6. Keep skin clean and dry;',
      '   manage incontinence promptly',
      '7. Adequate nutrition: protein,',
      '   Vitamin C, zinc, adequate calories',
      '8. Patient and caregiver education',
      '9. Regular skin inspection',
    ],
    '4',
    ['Interactive', 'lecture +', 'discussion'],
    ['Chart paper'],
    'What are the\npreventive measures\nof Bed Sores?',
    WHITE
  ),

  // 6 - MANAGEMENT
  dataRow(
    '6.',
    'Describe the\nmanagement of\nbed sores',
    [
      '• General / Systemic Management:',
      '  - Treat underlying diseases',
      '  - Nutritional support:',
      '    high protein, Vitamin C',
      '    (84% reduction in ulcer area)',
      '  - Correct anemia',
      '  - Air-fluidized bed therapy',
      '',
      '• Local Wound Care:',
      '  - Clean with normal saline',
      '    (avoid H2O2, povidone-iodine)',
      '  - Wet-to-dry dressings (saline)',
      '  - Hydrocolloid dressings –',
      '    Stage II ulcers',
      '  - Enzymatic debridement for',
      '    necrotic tissue',
      '  - Surgical debridement for',
      '    deep necrotic tissue',
      '',
      '• Antibiotic Therapy:',
      '  Mild: cephalexin / clindamycin',
      '  Moderate: clindamycin +',
      '    ciprofloxacin (2–4 weeks)',
      '  Severe: piperacillin/tazobactam',
      '    or imipenem (up to 12 weeks)',
      '',
      '• Surgical: flap closure for',
      '  Stage III/IV refractory ulcers',
    ],
    '4',
    ['Interactive', 'lecture +', 'discussion'],
    ['Chart paper'],
    'What is the\nmanagement of\nBed Sores?',
    LIGHT
  ),

  // SUMMARY
  new TableRow({
    children: [
      cell([para([normal('')], AlignmentType.CENTER)], WHITE),
      cell([para([bold('Summary')])], WHITE),
      cell([
        para([bold('• Summarization of key points:')]),
        para([normal('- Definition & prevalence')]),
        para([normal('- Risk factors & pathogenic factors')]),
        para([normal('- Signs, symptoms & complications')]),
        para([normal('- NPUAP Staging (I–IV +')]),
        para([normal('  Unstageable + Deep Tissue)')]),
        para([normal('- Common sites')]),
        para([normal('- Prevention & management')]),
      ], WHITE),
      cell([para([normal('3')], AlignmentType.CENTER)], WHITE),
      cell([para([normal('Discussion')])], WHITE),
      cell([para([normal('Discussion')])], WHITE),
      cell([para([normal('Wh-questions')])], WHITE),
    ]
  }),
];

// ── document ───────────────────────────────────────────────────────────────────
const doc = new Document({
  styles: {
    default: {
      document: {
        run: { font: 'Times New Roman', size: 20 }
      }
    }
  },
  sections: [{
    properties: {
      page: {
        size: { orientation: PageOrientation.LANDSCAPE },
        margin: { top: 720, bottom: 720, left: 720, right: 720 }
      }
    },
    children: [
      // Title block
      para([bold('NURSING HEALTH TEACHING PLAN', 28)], AlignmentType.CENTER, { before: 0, after: 100 }),
      para([bold('Topic: Bed Sores (Pressure Ulcers / Pressure Injuries)', 24)], AlignmentType.CENTER, { before: 0, after: 60 }),
      para([
        normal('Subject: Fundamentals of Nursing   |   ', 18),
        normal('Class: GNM / B.Sc. Nursing   |   ', 18),
        normal('Duration: ~20 minutes', 18),
      ], AlignmentType.CENTER, { before: 0, after: 200 }),

      // Main table
      new Table({
        width: { size: 100, type: WidthType.PERCENTAGE },
        columnWidths: [600, 1500, 3200, 600, 1400, 1100, 1800],
        rows: [headerRow, ...rows],
        borders: {
          top:    { style: BorderStyle.SINGLE, size: 6, color: '1F4E79' },
          bottom: { style: BorderStyle.SINGLE, size: 6, color: '1F4E79' },
          left:   { style: BorderStyle.SINGLE, size: 6, color: '1F4E79' },
          right:  { style: BorderStyle.SINGLE, size: 6, color: '1F4E79' },
          insideH:{ style: BorderStyle.SINGLE, size: 4, color: 'AED6F1' },
          insideV:{ style: BorderStyle.SINGLE, size: 4, color: 'AED6F1' },
        }
      }),

      // Footer note
      para([normal(' ')], AlignmentType.LEFT, { before: 200 }),
      para([
        normal('References: Washington Manual of Medical Therapeutics | Bailey & Love\'s Short Practice of Surgery (28th ed.) | Swanson\'s Family Medicine Review', 16)
      ], AlignmentType.LEFT, { before: 0, after: 0 }),
    ]
  }]
});

Packer.toBuffer(doc).then(buffer => {
  fs.writeFileSync('/home/daytona/workspace/bedsore-teaching-plan/BedSore_Health_Teaching_Plan.docx', buffer);
  console.log('SUCCESS: File written.');
});