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

const today = new Date().toLocaleDateString('en-GB', { day: '2-digit', month: 'long', year: 'numeric' });

function sectionHeading(text) {
  return new Paragraph({
    children: [new TextRun({ text, bold: true, size: 24, color: "1F4E79", font: "Arial" })],
    spacing: { before: 240, after: 80 },
    border: {
      bottom: { style: BorderStyle.SINGLE, size: 4, color: "1F4E79" }
    }
  });
}

function labelValue(label, value) {
  return new Paragraph({
    children: [
      new TextRun({ text: label + ": ", bold: true, size: 22, font: "Arial" }),
      new TextRun({ text: value, size: 22, font: "Arial" })
    ],
    spacing: { before: 60, after: 60 }
  });
}

function bodyText(text) {
  return new Paragraph({
    children: [new TextRun({ text, size: 22, font: "Arial" })],
    spacing: { before: 60, after: 60 }
  });
}

function bulletItem(text) {
  return new Paragraph({
    numbering: { reference: "bullets", level: 0 },
    children: [new TextRun({ text, size: 22, font: "Arial" })],
    spacing: { before: 40, after: 40 }
  });
}

const doc = new Document({
  numbering: {
    config: [
      {
        reference: "bullets",
        levels: [{
          level: 0,
          format: LevelFormat.BULLET,
          text: "\u2022",
          alignment: AlignmentType.LEFT,
          style: { paragraph: { indent: { left: 720, hanging: 360 } } }
        }]
      }
    ]
  },
  styles: {
    default: {
      document: { run: { font: "Arial", size: 22 } }
    }
  },
  sections: [{
    properties: {
      page: {
        margin: { top: 1000, bottom: 1000, left: 1200, right: 1200 }
      }
    },
    children: [

      // Hospital Header
      new Paragraph({
        children: [new TextRun({ text: "DISCHARGE SUMMARY", bold: true, size: 36, font: "Arial", color: "1F4E79" })],
        alignment: AlignmentType.CENTER,
        spacing: { after: 60 }
      }),
      new Paragraph({
        children: [new TextRun({ text: "Department of Urology / Nephrology", size: 22, font: "Arial", color: "444444" })],
        alignment: AlignmentType.CENTER,
        spacing: { after: 40 }
      }),
      new Paragraph({
        children: [new TextRun({ text: "Date of Discharge: " + today, size: 22, font: "Arial" })],
        alignment: AlignmentType.CENTER,
        spacing: { after: 280 },
        border: { bottom: { style: BorderStyle.DOUBLE, size: 6, color: "1F4E79" } }
      }),

      // Patient Demographics
      sectionHeading("Patient Information"),
      labelValue("Age / Sex", "50 years / Male"),
      labelValue("IP Number", "______________________"),
      labelValue("Ward / Bed", "______________________"),
      labelValue("Date of Admission", "______________________"),
      labelValue("Date of Discharge", today),
      labelValue("Treating Physician", "______________________"),
      labelValue("Consultant", "______________________"),

      // Presenting Complaints
      sectionHeading("Presenting Complaints"),
      bulletItem("Intermittent fever"),
      bulletItem("Pain during micturition (dysuria)"),
      bulletItem("Decreased urinary output"),

      // Clinical Background
      sectionHeading("Clinical Background"),
      bodyText("A 50-year-old male presented with a history of intermittent fever and pain during micturition. Clinical evaluation was consistent with an acute urinary tract infection with upper urinary tract involvement."),

      // Investigations
      sectionHeading("Investigations"),
      bodyText("Laboratory findings revealed evidence of Acute Kidney Injury (AKI) with worsening renal parameters. Serial serum creatinine monitoring was performed on a daily basis, demonstrating a progressive rise."),
      bodyText("Radiological investigations (USG / CT KUB) demonstrated features consistent with pyelonephritis."),
      bodyText("Urine culture grew Escherichia coli (E. coli) - sensitivity pattern guided antibiotic therapy."),

      // Diagnosis
      sectionHeading("Diagnosis"),
      bulletItem("Acute Pyelonephritis"),
      bulletItem("Acute Kidney Injury (AKI) secondary to obstructive uropathy / urosepsis"),
      bulletItem("E. coli urinary tract infection"),

      // Procedures Performed
      sectionHeading("Procedures Performed"),
      bodyText("In view of persistent fever, worsening renal parameters, and decreasing urinary output, the patient was taken up for DJ (Double-J) ureteric stenting under appropriate anaesthesia. The procedure was performed without complications."),

      // Treatment
      sectionHeading("Treatment During Admission"),
      bulletItem("DJ ureteric stenting performed"),
      bulletItem("Parenteral antibiotics initiated post-procedure, guided by culture and sensitivity"),
      bulletItem("Intravenous fluids and supportive management"),
      bulletItem("Serum creatinine monitored daily; renal function trended toward improvement"),
      bulletItem("Urine output monitoring with strict intake-output charting"),

      // Clinical Course
      sectionHeading("Clinical Course and Response"),
      bodyText("Following DJ stenting and initiation of targeted parenteral antibiotics, the patient demonstrated clinical improvement. Fever resolved, urinary output improved, and renal parameters showed a downward trend. Clinical resolution was achieved and the patient was deemed fit for discharge."),

      // Discharge Condition
      sectionHeading("Condition at Discharge"),
      labelValue("General Condition", "Stable, afebrile"),
      labelValue("Renal Function", "Improving - serum creatinine trending down"),
      labelValue("Urinary Output", "Adequate"),
      labelValue("Vitals", "Within acceptable limits"),

      // Discharge Medications
      sectionHeading("Discharge Medications"),
      bodyText("(To be filled by treating physician based on culture sensitivity and clinical response)"),
      bulletItem("Oral antibiotics - as per sensitivity: ______________________"),
      bulletItem("Analgesics / antispasmodics as required"),
      bulletItem("Alpha-blockers (if indicated for DJ stent symptoms): ______________________"),
      bulletItem("Other medications: ______________________"),

      // Follow-up
      sectionHeading("Follow-Up Instructions"),
      bulletItem("Review in Urology / Nephrology OPD after 1 week with repeat serum creatinine and urine culture"),
      bulletItem("DJ stent removal to be planned at ______________________ weeks (as advised by treating surgeon)"),
      bulletItem("Repeat imaging (USG KUB) at follow-up visit"),
      bulletItem("Ensure adequate oral fluid intake (>2 litres/day)"),
      bulletItem("Report immediately if fever recurs, pain worsens, or urinary output decreases"),

      // Advice on Discharge
      sectionHeading("Advice on Discharge"),
      bulletItem("Complete the full course of prescribed antibiotics"),
      bulletItem("Maintain strict oral hygiene and perineal hygiene"),
      bulletItem("Avoid NSAIDs without medical advice (nephrotoxicity risk)"),
      bulletItem("Do not miss follow-up appointment for DJ stent removal"),

      // Signatures
      new Paragraph({ children: [new TextRun("")], spacing: { before: 400, after: 0 } }),
      new Paragraph({
        children: [
          new TextRun({ text: "Signature of Treating Doctor: ________________________", size: 22, font: "Arial" }),
          new TextRun({ text: "         ", size: 22 }),
          new TextRun({ text: "Signature of Patient / Attendant: ________________________", size: 22, font: "Arial" })
        ],
        spacing: { before: 60, after: 60 }
      }),
      new Paragraph({
        children: [
          new TextRun({ text: "Name: ________________________", size: 22, font: "Arial" }),
          new TextRun({ text: "                                    ", size: 22 }),
          new TextRun({ text: "Name: ________________________", size: 22, font: "Arial" })
        ],
        spacing: { before: 40, after: 40 }
      }),
      new Paragraph({
        children: [
          new TextRun({ text: "Date: " + today, size: 22, font: "Arial" }),
          new TextRun({ text: "                                                        ", size: 22 }),
          new TextRun({ text: "Relationship: ________________________", size: 22, font: "Arial" })
        ],
        spacing: { before: 40, after: 40 }
      }),

      new Paragraph({
        children: [new TextRun({ text: "This document is generated electronically and is valid without a physical stamp.", size: 18, font: "Arial", color: "888888", italics: true })],
        alignment: AlignmentType.CENTER,
        spacing: { before: 300, after: 0 }
      }),
    ]
  }]
});

Packer.toBuffer(doc).then(buffer => {
  fs.writeFileSync("/home/daytona/workspace/discharge-summary/Discharge_Summary_Pyelonephritis.docx", buffer);
  console.log("Document created successfully.");
}).catch(err => {
  console.error("Error creating document:", err);
});