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

// ─── Color palette ─────────────────────────────────────────────────────────
const TEAL       = "2A7A8C";
const TEAL_LIGHT = "D6EEF2";
const SOFT_BLUE  = "EBF4F6";
const GREY_LIGHT = "F5F5F5";
const GREY_MID   = "DDDDDD";
const WHITE      = "FFFFFF";
const BLACK      = "222222";

// ─── Helpers ───────────────────────────────────────────────────────────────
function noBorder() {
  return { style: BorderStyle.NONE, size: 0, color: "FFFFFF" };
}

function thinBorder() {
  return { style: BorderStyle.SINGLE, size: 4, color: GREY_MID };
}

function cell(children, opts = {}) {
  return new TableCell({
    children: Array.isArray(children) ? children : [children],
    verticalAlign: VerticalAlign.CENTER,
    shading: opts.shading ? { fill: opts.shading, type: ShadingType.CLEAR, color: "auto" } : undefined,
    width: opts.width ? { size: opts.width, type: WidthType.DXA } : undefined,
    columnSpan: opts.span,
    borders: opts.borders || {
      top: thinBorder(), bottom: thinBorder(), left: thinBorder(), right: thinBorder()
    },
    margins: { top: 80, bottom: 80, left: 140, right: 140 }
  });
}

function headerCell(text, shade = TEAL) {
  return cell(
    new Paragraph({
      alignment: AlignmentType.CENTER,
      children: [new TextRun({ text, bold: true, color: WHITE, size: 18, font: "Arial" })]
    }),
    { shading: shade }
  );
}

function labelCell(text, shade = SOFT_BLUE, bold = false) {
  return cell(
    new Paragraph({
      children: [new TextRun({ text, bold, color: BLACK, size: 18, font: "Arial" })]
    }),
    { shading: shade }
  );
}

function inputCell(placeholder = "", shade = WHITE, span = 1) {
  return cell(
    new Paragraph({
      children: [new TextRun({ text: placeholder, color: "AAAAAA", size: 18, font: "Arial", italics: !!placeholder })]
    }),
    { shading: shade, span }
  );
}

function ratingCell(shade = WHITE) {
  return cell(
    new Paragraph({
      alignment: AlignmentType.CENTER,
      children: [new TextRun({ text: "  1  2  3  4  5  6  7  8  9  10", color: "999999", size: 16, font: "Arial" })]
    }),
    { shading: shade }
  );
}

function sectionHeading(text) {
  return new Paragraph({
    spacing: { before: 280, after: 80 },
    children: [
      new TextRun({ text: "  " + text + "  ", bold: true, color: WHITE, size: 20, font: "Arial",
        highlight: undefined, shading: { fill: TEAL, type: ShadingType.CLEAR } })
    ],
    shading: { fill: TEAL, type: ShadingType.CLEAR, color: "auto" }
  });
}

function smallNote(text) {
  return new Paragraph({
    spacing: { before: 40, after: 100 },
    children: [new TextRun({ text, color: "777777", size: 16, italics: true, font: "Arial" })]
  });
}

function spacer(before = 160, after = 80) {
  return new Paragraph({ spacing: { before, after }, children: [new TextRun("")] });
}

// ─── Build daily log table ─────────────────────────────────────────────────
function buildDailyTable() {
  const colWidths = [2400, 6626]; // label | input  (total ~9026 for A4)

  function row2(label, inputText = "", labelShade = SOFT_BLUE, inputShade = WHITE) {
    return new TableRow({
      children: [
        labelCell(label, labelShade),
        inputCell(inputText, inputShade)
      ]
    });
  }

  function ratingRow(label, labelShade = SOFT_BLUE) {
    return new TableRow({
      children: [
        labelCell(label, labelShade),
        ratingCell(WHITE)
      ]
    });
  }

  function sectionRow(text) {
    return new TableRow({
      children: [
        cell(
          new Paragraph({
            alignment: AlignmentType.LEFT,
            children: [new TextRun({ text, bold: true, color: WHITE, size: 18, font: "Arial" })]
          }),
          { shading: TEAL, span: 2 }
        )
      ]
    });
  }

  function subheadRow(text) {
    return new TableRow({
      children: [
        cell(
          new Paragraph({
            children: [new TextRun({ text, bold: true, color: TEAL, size: 18, font: "Arial" })]
          }),
          { shading: TEAL_LIGHT, span: 2 }
        )
      ]
    });
  }

  return new Table({
    width: { size: 100, type: WidthType.PERCENTAGE },
    columnWidths: colWidths,
    rows: [
      // ── Header ──
      new TableRow({
        children: [
          cell(
            new Paragraph({
              alignment: AlignmentType.CENTER,
              children: [new TextRun({ text: "DATE: _____ / _____ / _______     DAY #: _______", bold: true, size: 22, color: BLACK, font: "Arial" })]
            }),
            { shading: TEAL_LIGHT, span: 2 }
          )
        ]
      }),

      // ── MORNING ──
      sectionRow("MORNING  (upon waking)"),
      ratingRow("Energy level on waking  (1 = exhausted, 10 = great)"),
      row2("Sleep quality last night", "Circle: Very Poor / Poor / Fair / Good / Excellent"),
      row2("Hours slept", "_____ hrs"),
      row2("Woke up how many times?", "_____ times"),
      row2("How do you feel vs yesterday?", "Circle: Much Worse / Worse / Same / Better / Much Better"),
      row2("Morning symptoms", "e.g. headache, heavy limbs, dizziness..."),

      // ── MIDDAY ──
      sectionRow("MIDDAY  (around noon)"),
      ratingRow("Energy level now  (1 = exhausted, 10 = great)"),
      row2("Activity done this morning", "e.g. light walk, desk work, resting..."),
      row2("Brain fog / concentration", "Circle: None / Mild / Moderate / Severe"),
      row2("Midday symptoms", "e.g. brain fog, nausea, pain..."),

      // ── AFTERNOON ──
      sectionRow("AFTERNOON  (3-5 PM)"),
      ratingRow("Energy level now  (1 = exhausted, 10 = great)"),
      row2("Did you rest or nap?", "Circle: No / Short rest / Nap _____ min"),
      row2("Post-exertion crash?", "Circle: None / Mild / Moderate / Severe"),
      row2("Afternoon symptoms", ""),

      // ── EVENING ──
      sectionRow("EVENING  (wind-down)"),
      ratingRow("Energy level now  (1 = exhausted, 10 = great)"),
      row2("Activity done today (total)", "e.g. mostly rested / short walk / light chores..."),
      row2("Mood today", "Circle: Low / Neutral / Okay / Good"),
      row2("Stress level today", "Circle: None / Low / Moderate / High"),
      row2("Evening symptoms", ""),

      // ── SLEEP PREP ──
      sectionRow("BEDTIME"),
      row2("Bedtime", "_____ : _____ PM/AM"),
      row2("Screen time before bed", "_____ min"),
      row2("Caffeine today?", "Circle: None / 1 cup / 2+ cups  |  Last cup at: _____"),
      row2("Medications / supplements taken", ""),

      // ── DAILY TOTALS ──
      sectionRow("DAILY SUMMARY"),
      ratingRow("Overall energy today  (1 = exhausted, 10 = great)"),
      ratingRow("Overall pain / discomfort  (1 = none, 10 = severe)"),
      row2("Steps / movement today", "_____ steps  OR  _____ min of activity"),
      row2("Fluids consumed", "_____ glasses of water"),
      row2("Meals / appetite", "Circle: Poor / Fair / Normal / Good"),
      row2("One word to describe today", ""),
      new TableRow({
        children: [
          cell(
            new Paragraph({
              children: [new TextRun({ text: "Notes / observations for doctor", bold: true, color: BLACK, size: 18, font: "Arial" })]
            }),
            { shading: TEAL_LIGHT }
          ),
          inputCell("Anything unusual? Triggers noticed? New symptoms?", WHITE)
        ]
      }),
      new TableRow({
        tableHeader: false,
        children: [
          cell(
            new Paragraph({ children: [new TextRun({ text: "", size: 18 })] }),
            { shading: WHITE, span: 2, borders: { top: noBorder(), bottom: thinBorder(), left: thinBorder(), right: thinBorder() } }
          )
        ],
        height: { value: 600, rule: "exact" }
      })
    ]
  });
}

// ─── Weekly summary table ─────────────────────────────────────────────────
function buildWeeklySummary() {
  const days = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"];

  const headerRow = new TableRow({
    children: [
      headerCell("Metric", TEAL),
      ...days.map(d => headerCell(d, TEAL))
    ]
  });

  function metricRow(label, shade = WHITE) {
    return new TableRow({
      children: [
        labelCell(label, SOFT_BLUE, true),
        ...days.map(() => inputCell("", shade))
      ]
    });
  }

  return new Table({
    width: { size: 100, type: WidthType.PERCENTAGE },
    rows: [
      headerRow,
      metricRow("Morning energy (1-10)"),
      metricRow("Avg energy (1-10)"),
      metricRow("Sleep hours"),
      metricRow("Sleep quality (1-10)"),
      metricRow("Brain fog (1-10)"),
      metricRow("Pain (1-10)"),
      metricRow("Activity level (1-10)"),
      metricRow("Post-exertion crash?"),
      metricRow("Mood (1-10)"),
      new TableRow({
        children: [
          labelCell("Best time of day", SOFT_BLUE, true),
          ...days.map(() => inputCell("", WHITE))
        ]
      }),
      new TableRow({
        children: [
          labelCell("Worst time of day", SOFT_BLUE, true),
          ...days.map(() => inputCell("", WHITE))
        ]
      }),
    ]
  });
}

// ─── How to use guide ─────────────────────────────────────────────────────
function buildHowToUse() {
  const items = [
    ["Fill in daily", "Complete each section at the time of day shown (morning, midday, afternoon, evening, bedtime). Takes about 3-5 minutes total per day."],
    ["Be consistent", "Track every day, even good ones. Patterns only emerge from continuous data."],
    ["Rate honestly", "The 1-10 scales are relative to YOUR normal, not a healthy person. 5 = your average."],
    ["Post-exertion watch", "If you feel worse 12-48 hours after activity, note it in 'Post-exertion crash'. This is a key diagnostic clue."],
    ["Bring to appointments", "Print 2-4 weeks of logs before seeing your doctor. The weekly summary table is especially useful for spotting trends."],
    ["Notice patterns", "Look for: time-of-day trends, activity-crash cycles, sleep vs energy links, food or stress triggers."],
  ];

  const rows = items.map(([title, desc]) =>
    new TableRow({
      children: [
        labelCell(title, TEAL_LIGHT, true),
        cell(
          new Paragraph({ children: [new TextRun({ text: desc, size: 18, font: "Arial", color: BLACK })] }),
          { shading: WHITE }
        )
      ]
    })
  );

  return new Table({
    width: { size: 100, type: WidthType.PERCENTAGE },
    rows: [
      new TableRow({
        children: [
          cell(
            new Paragraph({
              alignment: AlignmentType.CENTER,
              children: [new TextRun({ text: "HOW TO USE THIS TRACKER", bold: true, size: 20, color: WHITE, font: "Arial" })]
            }),
            { shading: TEAL, span: 2 }
          )
        ]
      }),
      ...rows
    ]
  });
}

// ─── Assemble document ────────────────────────────────────────────────────
const doc = new Document({
  styles: {
    default: {
      document: { run: { font: "Arial", size: 20, color: BLACK } }
    },
    paragraphStyles: [
      {
        id: "Heading1", name: "Heading 1", basedOn: "Normal", next: "Normal", quickFormat: true,
        run: { size: 36, bold: true, font: "Arial", color: TEAL },
        paragraph: { spacing: { before: 200, after: 160 }, outlineLevel: 0 }
      },
      {
        id: "Heading2", name: "Heading 2", basedOn: "Normal", next: "Normal", quickFormat: true,
        run: { size: 26, bold: true, font: "Arial", color: TEAL },
        paragraph: { spacing: { before: 200, after: 120 }, outlineLevel: 1 }
      }
    ]
  },
  sections: [
    // ── Section 1: Cover / How-to ──────────────────────────────────────
    {
      properties: {},
      children: [
        spacer(0, 200),
        new Paragraph({
          alignment: AlignmentType.CENTER,
          spacing: { before: 0, after: 60 },
          children: [new TextRun({ text: "Daily Energy & Symptom Tracker", bold: true, size: 48, font: "Arial", color: TEAL })]
        }),
        new Paragraph({
          alignment: AlignmentType.CENTER,
          spacing: { before: 0, after: 60 },
          children: [new TextRun({ text: "For Prolonged Fatigue, ME/CFS & Chronic Illness", size: 24, font: "Arial", color: "555555", italics: true })]
        }),
        new Paragraph({
          alignment: AlignmentType.CENTER,
          spacing: { before: 0, after: 400 },
          children: [new TextRun({ text: "Name: ________________________________     Start Date: _______________", size: 22, font: "Arial", color: "333333" })]
        }),

        buildHowToUse(),

        spacer(300, 200),

        new Paragraph({
          alignment: AlignmentType.CENTER,
          spacing: { before: 0, after: 200 },
          children: [new TextRun({ text: "Tip: Print multiple copies of the Daily Log page and fill one per day.", size: 18, font: "Arial", color: "777777", italics: true })]
        }),

        // Page break before daily log
        new Paragraph({ children: [new PageBreak()] }),
      ]
    },

    // ── Section 2: Daily Log ───────────────────────────────────────────
    {
      properties: {},
      children: [
        new Paragraph({
          heading: HeadingLevel.HEADING_1,
          spacing: { before: 0, after: 160 },
          children: [new TextRun({ text: "Daily Log", bold: true, size: 36, font: "Arial", color: TEAL })]
        }),
        smallNote("Fill in each section at the time of day shown. Ratings are 1 (worst) to 10 (best) unless noted otherwise."),
        spacer(80, 80),
        buildDailyTable(),
        spacer(200, 100),
        new Paragraph({ children: [new PageBreak()] }),
      ]
    },

    // ── Section 3: Weekly Summary ──────────────────────────────────────
    {
      properties: {},
      children: [
        new Paragraph({
          heading: HeadingLevel.HEADING_1,
          spacing: { before: 0, after: 160 },
          children: [new TextRun({ text: "Weekly Summary", bold: true, size: 36, font: "Arial", color: TEAL })]
        }),
        smallNote("Week of: _______________  |  Fill in your daily scores at the end of each week to track trends."),
        spacer(80, 80),
        buildWeeklySummary(),
        spacer(240, 160),

        new Paragraph({
          heading: HeadingLevel.HEADING_2,
          children: [new TextRun({ text: "Weekly Observations", bold: true, size: 26, color: TEAL, font: "Arial" })]
        }),
        smallNote("Look back at the week. What patterns stand out? Were there triggers? Best/worst days?"),
        new Table({
          width: { size: 100, type: WidthType.PERCENTAGE },
          rows: [
            new TableRow({
              children: [
                cell(new Paragraph({ children: [new TextRun({ text: "Best day of week & why:", size: 18, font: "Arial" })] }), { shading: SOFT_BLUE }),
                inputCell("", WHITE),
              ]
            }),
            new TableRow({
              children: [
                cell(new Paragraph({ children: [new TextRun({ text: "Worst day of week & why:", size: 18, font: "Arial" })] }), { shading: SOFT_BLUE }),
                inputCell("", WHITE),
              ]
            }),
            new TableRow({
              children: [
                cell(new Paragraph({ children: [new TextRun({ text: "Possible triggers noticed:", size: 18, font: "Arial" })] }), { shading: SOFT_BLUE }),
                inputCell("e.g. poor sleep, overactivity, stress, food...", WHITE),
              ]
            }),
            new TableRow({
              children: [
                cell(new Paragraph({ children: [new TextRun({ text: "Activity vs energy relationship:", size: 18, font: "Arial" })] }), { shading: SOFT_BLUE }),
                inputCell("Did more activity lead to a crash 1-2 days later?", WHITE),
              ]
            }),
            new TableRow({
              children: [
                cell(new Paragraph({ children: [new TextRun({ text: "Questions for my doctor:", size: 18, font: "Arial" })] }), { shading: SOFT_BLUE }),
                inputCell("", WHITE),
              ]
            }),
            new TableRow({
              children: [
                cell(new Paragraph({ children: [new TextRun({ text: "Overall trend vs last week:", size: 18, font: "Arial" })] }), { shading: SOFT_BLUE }),
                cell(
                  new Paragraph({
                    children: [new TextRun({ text: "Circle: Worse / Same / Slightly Better / Better / Much Better", color: "999999", size: 18, italics: true, font: "Arial" })]
                  }),
                  { shading: WHITE }
                ),
              ]
            }),
          ]
        }),

        spacer(200, 100),
      ]
    }
  ]
});

Packer.toBuffer(doc).then(buffer => {
  fs.writeFileSync("/home/daytona/workspace/symptom-tracker/Daily_Energy_Symptom_Tracker.docx", buffer);
  console.log("Done.");
});

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

// ─── Palette ───────────────────────────────────────────────────────────────
const TEAL       = "1A6E7A";
const TEAL_LIGHT = "D6EEF2";
const GREY_LIGHT = "F5F5F5";
const GREY_MID   = "CCCCCC";
const WHITE      = "FFFFFF";
const BLACK      = "222222";
const MID_GREY   = "555555";

// ─── Helpers ───────────────────────────────────────────────────────────────
function thin() { return { style: BorderStyle.SINGLE, size: 4, color: GREY_MID }; }
function none() { return { style: BorderStyle.NONE,   size: 0, color: WHITE    }; }

function para(text, opts = {}) {
  return new Paragraph({
    alignment: opts.align || AlignmentType.LEFT,
    spacing:   { before: opts.before ?? 120, after: opts.after ?? 120 },
    children:  [new TextRun({
      text,
      bold:    opts.bold    ?? false,
      italics: opts.italic  ?? false,
      size:    opts.size    ?? 22,
      color:   opts.color   ?? BLACK,
      font:    "Arial",
    })]
  });
}

function fieldRow(label, placeholder, labelWidth = 2800, inputWidth = 6226) {
  return new TableRow({
    children: [
      new TableCell({
        children: [new Paragraph({
          spacing: { before: 80, after: 80 },
          children: [new TextRun({ text: label, bold: true, size: 20, font: "Arial", color: BLACK })]
        })],
        width: { size: labelWidth, type: WidthType.DXA },
        shading: { fill: GREY_LIGHT, type: ShadingType.CLEAR, color: "auto" },
        verticalAlign: VerticalAlign.CENTER,
        margins: { top: 80, bottom: 80, left: 140, right: 140 },
        borders: { top: thin(), bottom: thin(), left: thin(), right: thin() }
      }),
      new TableCell({
        children: [new Paragraph({
          spacing: { before: 80, after: 80 },
          children: [new TextRun({ text: placeholder, italics: true, size: 20, font: "Arial", color: "999999" })]
        })],
        width: { size: inputWidth, type: WidthType.DXA },
        shading: { fill: WHITE, type: ShadingType.CLEAR, color: "auto" },
        verticalAlign: VerticalAlign.CENTER,
        margins: { top: 80, bottom: 80, left: 140, right: 140 },
        borders: { top: thin(), bottom: thin(), left: thin(), right: thin() }
      })
    ]
  });
}

function sectionHeaderRow(text) {
  return new TableRow({
    children: [
      new TableCell({
        columnSpan: 2,
        children: [new Paragraph({
          spacing: { before: 100, after: 100 },
          children: [new TextRun({ text, bold: true, size: 20, color: WHITE, font: "Arial" })]
        })],
        shading: { fill: TEAL, type: ShadingType.CLEAR, color: "auto" },
        margins: { top: 80, bottom: 80, left: 140, right: 140 },
        borders: { top: none(), bottom: none(), left: none(), right: none() }
      })
    ]
  });
}

function checkRow(label) {
  return new TableRow({
    children: [
      new TableCell({
        children: [new Paragraph({
          spacing: { before: 60, after: 60 },
          children: [
            new TextRun({ text: "[ ]  ", bold: true, size: 20, font: "Courier New", color: TEAL }),
            new TextRun({ text: label, size: 20, font: "Arial", color: BLACK })
          ]
        })],
        columnSpan: 2,
        shading: { fill: WHITE, type: ShadingType.CLEAR, color: "auto" },
        margins: { top: 60, bottom: 60, left: 200, right: 140 },
        borders: { top: thin(), bottom: thin(), left: thin(), right: thin() }
      })
    ]
  });
}

function noteRow(label, lines = 2) {
  // multi-line text box
  return new TableRow({
    children: [
      new TableCell({
        children: [new Paragraph({
          spacing: { before: 80, after: 80 },
          children: [new TextRun({ text: label, bold: true, size: 20, font: "Arial", color: BLACK })]
        })],
        width: { size: 2800, type: WidthType.DXA },
        shading: { fill: GREY_LIGHT, type: ShadingType.CLEAR, color: "auto" },
        verticalAlign: VerticalAlign.TOP,
        margins: { top: 80, bottom: 80, left: 140, right: 140 },
        borders: { top: thin(), bottom: thin(), left: thin(), right: thin() }
      }),
      new TableCell({
        children: Array.from({ length: lines }, () => new Paragraph({
          spacing: { before: 100, after: 100 },
          children: [new TextRun({ text: "", size: 20, font: "Arial" })]
        })),
        width: { size: 6226, type: WidthType.DXA },
        shading: { fill: WHITE, type: ShadingType.CLEAR, color: "auto" },
        margins: { top: 80, bottom: 80, left: 140, right: 140 },
        borders: { top: thin(), bottom: thin(), left: thin(), right: thin() }
      })
    ]
  });
}

// ─── Build letter body ──────────────────────────────────────────────────────

// SECTION A: GP / Practice details
const sectionA = new Table({
  width: { size: 100, type: WidthType.PERCENTAGE },
  rows: [
    sectionHeaderRow("A.  REFERRING PRACTICE"),
    fieldRow("Practice name",         "[Practice name]"),
    fieldRow("GP name",               "Dr [First name] [Surname]"),
    fieldRow("Address",               "[Street, Town, County, Postcode]"),
    fieldRow("Phone",                 "[01xxx xxxxxx]"),
    fieldRow("Email",                 "[gp@nhs.net]"),
    fieldRow("Date of letter",        "[DD/MM/YYYY]"),
  ]
});

// SECTION B: Patient details
const sectionB = new Table({
  width: { size: 100, type: WidthType.PERCENTAGE },
  rows: [
    sectionHeaderRow("B.  PATIENT DETAILS"),
    fieldRow("Full name",             "[Patient full name]"),
    fieldRow("Date of birth",         "[DD/MM/YYYY]"),
    fieldRow("NHS number",            "[NHS number]"),
    fieldRow("Address",               "[Patient address]"),
    fieldRow("Phone",                 "[Patient phone number]"),
    fieldRow("Gender",                "[Male / Female / Non-binary / Prefer not to say]"),
  ]
});

// SECTION C: Referral destination
const sectionC = new Table({
  width: { size: 100, type: WidthType.PERCENTAGE },
  rows: [
    sectionHeaderRow("C.  REFERRAL DESTINATION"),
    fieldRow("Service / clinic name", "[e.g. Royal London Hospital for Integrated Medicine ME/CFS Service]"),
    fieldRow("Address",               "[Service address]"),
    fieldRow("Referral sent via",     "[NHS e-Referral (Choose and Book) / Post / Email]"),
    fieldRow("Priority",              "Routine  [ ]     Urgent  [ ]"),
  ]
});

// SECTION D: Clinical summary
const sectionD = new Table({
  width: { size: 100, type: WidthType.PERCENTAGE },
  rows: [
    sectionHeaderRow("D.  CLINICAL SUMMARY"),
    fieldRow("Duration of symptoms",  "[e.g. 12 months]"),
    fieldRow("Onset",                 "[Gradual / Sudden / Post-viral / Post-COVID]"),
    noteRow("Presenting symptoms",    4),
    fieldRow("Functional impact",     "[e.g. unable to work / housebound / reduced activity]"),
    fieldRow("Prior diagnoses ruled out", "[e.g. hypothyroidism, anaemia, diabetes - all excluded]"),
  ]
});

// SECTION E: Investigations
const sectionE = new Table({
  width: { size: 100, type: WidthType.PERCENTAGE },
  rows: [
    sectionHeaderRow("E.  INVESTIGATIONS COMPLETED  (tick all done - attach results)"),
    checkRow("Full Blood Count (FBC)"),
    checkRow("Thyroid function (TSH, Free T4)"),
    checkRow("Ferritin / iron studies"),
    checkRow("Vitamin B12 and folate"),
    checkRow("Vitamin D (25-OH)"),
    checkRow("Fasting glucose / HbA1c"),
    checkRow("Renal function (U&E, eGFR)"),
    checkRow("Liver function tests (LFTs)"),
    checkRow("C-reactive protein (CRP) / ESR"),
    checkRow("Urinalysis"),
    checkRow("Blood pressure and orthostatic vitals"),
    new TableRow({
      children: [
        new TableCell({
          columnSpan: 2,
          children: [new Paragraph({
            spacing: { before: 60, after: 60 },
            children: [
              new TextRun({ text: "Result summary: ", bold: true, size: 20, font: "Arial", color: BLACK }),
              new TextRun({ text: "All within normal limits  [ ]     Abnormalities noted below  [ ]", size: 20, font: "Arial", color: BLACK }),
            ]
          })],
          shading: { fill: GREY_LIGHT, type: ShadingType.CLEAR, color: "auto" },
          margins: { top: 80, bottom: 80, left: 200, right: 140 },
          borders: { top: thin(), bottom: thin(), left: thin(), right: thin() }
        })
      ]
    }),
    noteRow("Abnormalities / notes", 2),
  ]
});

// SECTION F: ME/CFS criteria check
const sectionF = new Table({
  width: { size: 100, type: WidthType.PERCENTAGE },
  rows: [
    sectionHeaderRow("F.  IOM / NICE 2021 ME/CFS CRITERIA CHECK  (tick if present)"),
    checkRow("Substantial reduction in activity lasting >6 months with new, unexplained fatigue"),
    checkRow("Post-Exertional Malaise (PEM) - symptoms worsen after physical or mental effort"),
    checkRow("Unrefreshing sleep"),
    checkRow("Cognitive impairment (brain fog, difficulty concentrating, memory problems)"),
    checkRow("Orthostatic intolerance (symptoms worsen upright, improve lying down)"),
    new TableRow({
      children: [
        new TableCell({
          columnSpan: 2,
          children: [new Paragraph({
            spacing: { before: 80, after: 80 },
            children: [new TextRun({
              text: "Note: NICE 2021 guideline requires symptoms 1-3 plus at least one of 4 or 5, present at least half the time with moderate, substantial, or severe intensity.",
              italics: true, size: 18, font: "Arial", color: MID_GREY
            })]
          })],
          shading: { fill: TEAL_LIGHT, type: ShadingType.CLEAR, color: "auto" },
          margins: { top: 80, bottom: 80, left: 200, right: 140 },
          borders: { top: thin(), bottom: thin(), left: thin(), right: thin() }
        })
      ]
    }),
  ]
});

// SECTION G: Current management
const sectionG = new Table({
  width: { size: 100, type: WidthType.PERCENTAGE },
  rows: [
    sectionHeaderRow("G.  CURRENT MANAGEMENT"),
    noteRow("Current medications",        2),
    noteRow("Supplements",                1),
    noteRow("Other referrals / services", 2),
    noteRow("What has been tried so far", 2),
  ]
});

// SECTION H: Free text / reason for referral
const sectionH = new Table({
  width: { size: 100, type: WidthType.PERCENTAGE },
  rows: [
    sectionHeaderRow("H.  REASON FOR REFERRAL  (free text)"),
    new TableRow({
      children: [
        new TableCell({
          columnSpan: 2,
          children: Array.from({ length: 8 }, () =>
            new Paragraph({ spacing: { before: 100, after: 100 }, children: [new TextRun({ text: "", size: 20 })] })
          ),
          shading: { fill: WHITE, type: ShadingType.CLEAR, color: "auto" },
          margins: { top: 100, bottom: 100, left: 200, right: 200 },
          borders: { top: thin(), bottom: thin(), left: thin(), right: thin() }
        })
      ]
    }),
    new TableRow({
      children: [
        new TableCell({
          columnSpan: 2,
          children: [new Paragraph({
            spacing: { before: 80, after: 80 },
            children: [new TextRun({
              text: "Suggested opening: \"I am referring [patient name], a [age]-year-old [gender], who presents with a [duration]-history of persistent, debilitating fatigue, cognitive impairment and unrefreshing sleep, for which no alternative medical explanation has been found following thorough investigation. The presentation is consistent with ME/CFS under NICE 2021 criteria. I am requesting specialist assessment, diagnosis confirmation, and guidance on management.\"",
              italics: true, size: 18, font: "Arial", color: MID_GREY
            })]
          })],
          shading: { fill: TEAL_LIGHT, type: ShadingType.CLEAR, color: "auto" },
          margins: { top: 80, bottom: 80, left: 200, right: 140 },
          borders: { top: thin(), bottom: thin(), left: thin(), right: thin() }
        })
      ]
    }),
  ]
});

// SECTION I: GP signature
const sectionI = new Table({
  width: { size: 100, type: WidthType.PERCENTAGE },
  rows: [
    sectionHeaderRow("I.  SIGNATURE"),
    fieldRow("GP signature",         "[Signature]"),
    fieldRow("Printed name",         "[Dr First name Surname]"),
    fieldRow("GMC number",           "[GMC number]"),
    fieldRow("Date",                 "[DD/MM/YYYY]"),
  ]
});

// ─── Assemble ───────────────────────────────────────────────────────────────
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  sections: [{
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            rows: [
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                        spacing: { before: 60, after: 20 },
                        children: [new TextRun({ text: "NHS GP REFERRAL LETTER", bold: true, size: 28, color: TEAL, font: "Arial" })]
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                        children: [new TextRun({ text: "Myalgic Encephalomyelitis / Chronic Fatigue Syndrome (ME/CFS) Specialist Service", size: 18, color: MID_GREY, font: "Arial", italics: true })]
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            spacing: { before: 40, after: 0 },
            children: [new TextRun({
              text: "ME/CFS Referral Template  |  Based on NICE guideline NG206 (2021) & NICE CKS (May 2025)  |  Page ",
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    children: [
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        children: [new TextRun({ text: "INSTRUCTIONS FOR GP", bold: true, size: 22, color: TEAL, font: "Arial" })]
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        rows: [
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                columnSpan: 1,
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                  ...[
                    "Complete all sections A-I, deleting placeholder text in [brackets]",
                    "Attach copies of all relevant blood test results",
                    "Reference NICE guideline NG206 (2021) and the May 2025 NICE Clinical Knowledge Summary on ME/CFS",
                    "Send via NHS e-Referral (Choose and Book) where available, or directly to the clinic",
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Packer.toBuffer(doc).then(buffer => {
  fs.writeFileSync("/home/daytona/workspace/symptom-tracker/ME_CFS_Referral_Letter_Template.docx", buffer);
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