#!/usr/bin/env python3
"""
Comprehensive Clinical Quick-Reference PDF
Hindi C/O + English Rx + Dose/Freq/Duration + Advice + Treatment Flow
"""

from reportlab.lib.pagesizes import A4
from reportlab.lib import colors
from reportlab.lib.units import mm, cm
from reportlab.pdfgen import canvas
from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.platypus import Paragraph
from reportlab.lib.enums import TA_LEFT, TA_CENTER, TA_RIGHT
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont
import os, math

# ── colour palette ──────────────────────────────────────────────────────────
CLR = {
    "deep_blue":   colors.HexColor("#1A237E"),
    "mid_blue":    colors.HexColor("#283593"),
    "sky":         colors.HexColor("#42A5F5"),
    "light_blue":  colors.HexColor("#E3F2FD"),
    "teal":        colors.HexColor("#00695C"),
    "light_teal":  colors.HexColor("#E0F2F1"),
    "red":         colors.HexColor("#C62828"),
    "light_red":   colors.HexColor("#FFEBEE"),
    "orange":      colors.HexColor("#E65100"),
    "light_orange":colors.HexColor("#FFF3E0"),
    "green":       colors.HexColor("#2E7D32"),
    "light_green": colors.HexColor("#E8F5E9"),
    "purple":      colors.HexColor("#6A1B9A"),
    "light_purple":colors.HexColor("#F3E5F5"),
    "amber":       colors.HexColor("#FF6F00"),
    "light_amber": colors.HexColor("#FFF8E1"),
    "indigo":      colors.HexColor("#283593"),
    "light_indigo":colors.HexColor("#E8EAF6"),
    "grey":        colors.HexColor("#424242"),
    "light_grey":  colors.HexColor("#F5F5F5"),
    "white":       colors.white,
    "cream":       colors.HexColor("#FFFDE7"),
    "dark":        colors.HexColor("#212121"),
    "paper":       colors.HexColor("#FAFAFA"),
}

W, H = A4   # 595.27 x 841.89 pts

# ── font registration ────────────────────────────────────────────────────────
HINDI_FONT = "Helvetica"   # fallback – will be replaced if Noto is available
NOTO_PATHS = [
    "/usr/share/fonts/truetype/noto/NotoSansDevanagari-Regular.ttf",
    "/usr/share/fonts/noto/NotoSansDevanagari-Regular.ttf",
    "/home/daytona/.fonts/NotoSansDevanagari-Regular.ttf",
]
for p in NOTO_PATHS:
    if os.path.exists(p):
        try:
            pdfmetrics.registerFont(TTFont("NotoDevanagari", p))
            HINDI_FONT = "NotoDevanagari"
            print(f"Hindi font loaded: {p}")
        except Exception as e:
            print(f"Font load error: {e}")
        break

# ── clinical data ────────────────────────────────────────────────────────────
# Each entry: (system_color_key, system, title_en, co_hindi,
#              rx: [(drug, dose, freq, duration)],
#              advice: [str],
#              flow: [str],
#              emoji, drug_icons: [str])

CASES = [
    # ═══════ RESPIRATORY ═══════
    ("sky", "RESPIRATORY", "Common Cold", "नाक बहना, छींकें, गले में खराश",
     [("Tab. Cetirizine", "10 mg", "OD at night", "5 days"),
      ("Tab. Paracetamol", "500 mg", "TDS (if fever)", "3 days"),
      ("Syp. Ambroxol", "10 ml", "TDS", "5 days"),
      ("Nasal Saline drops", "2 drops each nostril", "QID", "5 days")],
     ["Rest & adequate hydration (2–3 L water/day)",
      "Steam inhalation 2x/day",
      "Avoid cold foods & drinks",
      "Honey + ginger tea for sore throat",
      "Return if fever >3 days or breathing difficulty"],
     ["Viral URTI", "Antihistamine + Analgesic", "Mucolytic if cough", "Saline nasal wash", "Review Day 5"],
     "🤧", ["Cetirizine", "Paracetamol", "Ambroxol"]),

    ("sky", "RESPIRATORY", "Pharyngitis (Acute)", "गले में दर्द, निगलने में तकलीफ",
     [("Tab. Amoxicillin", "500 mg", "TDS", "5 days"),
      ("Tab. Paracetamol", "650 mg", "TDS", "3 days"),
      ("Betadine Gargle", "10 ml in water", "TDS", "5 days"),
      ("Lozenge (Strepsils)", "1 lozenge", "4-hrly", "3 days")],
     ["Warm saline gargles 3–4x/day",
      "Avoid spicy, hot food",
      "Complete antibiotic course",
      "Throat swab if no improvement in 48 hrs",
      "Isolate from family members"],
     ["Throat exam (exudate?)", "Bacterial → Amoxicillin", "Viral → supportive", "Gargles + analgesic", "Review 48 hrs"],
     "🦠", ["Amoxicillin", "Paracetamol", "Betadine Gargle"]),

    ("sky", "RESPIRATORY", "Acute Bronchitis", "खाँसी (बलगम के साथ), सीने में जकड़न",
     [("Tab. Azithromycin", "500 mg", "OD", "3 days"),
      ("Tab. Salbutamol", "4 mg", "TDS", "5 days"),
      ("Syp. Ambroxol + Guaifenesin", "10 ml", "TDS", "7 days"),
      ("Tab. Paracetamol", "500 mg", "SOS (fever)", "3 days")],
     ["Steam inhalation with eucalyptus oil",
      "Increase fluid intake",
      "Avoid smoking / dusty environments",
      "Use inhaler if wheezing",
      "X-ray chest if not improving in 5 days"],
     ["Clinical diagnosis", "Azithromycin (atypicals)", "Bronchodilator if wheeze", "Mucolytic", "CXR if worsening"],
     "🫁", ["Azithromycin", "Salbutamol", "Ambroxol"]),

    ("red", "RESPIRATORY", "Pneumonia (Community-Acquired)", "तेज बुखार, खाँसी, साँस लेने में तकलीफ",
     [("Tab. Amoxicillin-Clavulanate", "625 mg", "TDS", "7 days"),
      ("Tab. Azithromycin", "500 mg", "OD", "5 days"),
      ("Tab. Paracetamol", "650 mg", "TDS", "5 days"),
      ("Salbutamol Nebulisation", "2.5 mg in NS", "TDS", "3 days")],
     ["Admit if SpO2 < 94% or RR > 30",
      "Oxygen supplementation as needed",
      "High fluid intake",
      "Deep breathing exercises",
      "Repeat CXR at 4–6 weeks"],
     ["CURB-65 score", "O2 if SpO2<94%", "Dual antibiotic (CAP)", "Nebulisation", "CXR follow-up"],
     "🏥", ["Amoxiclav", "Azithromycin", "Salbutamol Neb"]),

    ("orange", "RESPIRATORY", "Acute Asthma Attack", "अचानक साँस फूलना, सीटी की आवाज (wheeze)",
     [("Salbutamol Inhaler (MDI)", "2 puffs", "Q20 min x3, then Q4h", "Acute phase"),
      ("Tab. Prednisolone", "40 mg", "OD morning", "5 days"),
      ("Ipratropium Neb", "0.5 mg", "TDS", "3 days"),
      ("Tab. Montelukast", "10 mg", "OD night", "30 days")],
     ["Carry rescue inhaler at all times",
      "Identify and avoid triggers",
      "Use spacer device with MDI",
      "Peak flow diary",
      "Urgent ER if no relief in 20 mins"],
     ["Severity assess (PEFR/SpO2)", "SABA (Salbutamol)", "Systemic steroid", "SAMA if severe", "Discharge plan + Montelukast"],
     "💨", ["Salbutamol MDI", "Prednisolone", "Montelukast"]),

    # ═══════ GASTROINTESTINAL ═══════
    ("teal", "GASTROINTESTINAL", "Acute Diarrhea", "पतले दस्त, पेट में मरोड़",
     [("ORS Sachet", "200 ml after each loose stool", "After each stool", "Till diarrhea stops"),
      ("Tab. Metronidazole", "400 mg", "TDS", "5 days"),
      ("Tab. Racecadotril", "100 mg", "TDS", "3 days"),
      ("Tab. Zinc", "20 mg", "OD", "14 days")],
     ["ORS is first-line treatment",
      "Avoid dairy & spicy food",
      "BRAT diet (banana, rice, apple, toast)",
      "Wash hands frequently",
      "Admit if signs of dehydration"],
     ["Assess dehydration", "ORS rehydration", "Antimicrobial (if needed)", "Zinc supplementation", "Stool exam if prolonged"],
     "🚽", ["ORS", "Metronidazole", "Zinc"]),

    ("teal", "GASTROINTESTINAL", "Acute Gastritis", "पेट में जलन, उल्टी का मन",
     [("Tab. Pantoprazole", "40 mg", "OD before breakfast", "14 days"),
      ("Tab. Domperidone", "10 mg", "TDS before meals", "7 days"),
      ("Syp. Sucralfate", "15 ml", "QID before meals", "14 days"),
      ("Tab. Ondansetron", "4 mg", "TDS (if vomiting)", "3 days")],
     ["Avoid NSAIDs, alcohol, smoking",
      "Small frequent meals",
      "Avoid spicy & fried food",
      "H. pylori test if recurrent",
      "Endoscopy if not improving"],
     ["Exclude H.pylori", "PPI (Pantoprazole)", "Prokinetic", "Sucralfate mucoprotectant", "Review 2 weeks"],
     "🔥", ["Pantoprazole", "Domperidone", "Sucralfate"]),

    ("teal", "GASTROINTESTINAL", "Acidity / GERD", "सीने में जलन, खट्टी डकार, एसिडिटी",
     [("Tab. Pantoprazole", "40 mg", "BD (before meals)", "4 weeks"),
      ("Antacid Gel (Gelusil)", "15 ml", "TDS after meals + bedtime", "4 weeks"),
      ("Tab. Domperidone", "10 mg", "TDS before meals", "2 weeks"),
      ("Tab. Ranitidine", "150 mg", "BD", "4 weeks")],
     ["Elevate head of bed by 30 degrees",
      "Avoid late-night meals",
      "No tea/coffee on empty stomach",
      "Avoid tight clothing",
      "Weight loss if obese"],
     ["Lifestyle modification", "PPI x4 weeks", "Antacid SOS", "Prokinetic", "Endoscopy if alarm features"],
     "🌶️", ["Pantoprazole", "Antacid", "Domperidone"]),

    ("teal", "GASTROINTESTINAL", "Intestinal Worms", "पेट दर्द, गुदा में खुजली, भूख न लगना",
     [("Tab. Albendazole", "400 mg", "Single dose", "1 day"),
      ("Tab. Mebendazole", "100 mg", "BD", "3 days"),
      ("Tab. Pyrantel Pamoate", "10 mg/kg", "Single dose", "1 day"),
      ("Iron + Folic Acid", "1 tab", "OD", "1 month (if anaemic)")],
     ["Treat all family members simultaneously",
      "Wash hands before meals, after toilet",
      "Trim fingernails short",
      "Cook food properly, drink filtered water",
      "Repeat dose after 2 weeks"],
     ["Stool microscopy (ova/cyst)", "Broad-spectrum anthelmintic", "Iron if anaemic", "Family treatment", "Hygiene counselling"],
     "🪱", ["Albendazole", "Mebendazole", "Iron-Folic Acid"]),

    # ═══════ CARDIOVASCULAR ═══════
    ("red", "CARDIOVASCULAR", "Hypertension", "सिरदर्द, चक्कर, बीपी बढ़ना",
     [("Tab. Amlodipine", "5 mg", "OD morning", "Lifelong"),
      ("Tab. Losartan", "50 mg", "OD morning", "Lifelong"),
      ("Tab. Aspirin", "75 mg", "OD after food", "Lifelong"),
      ("Tab. Atorvastatin", "20 mg", "OD night", "Lifelong (if CVD risk)")],
     ["Low-salt diet (< 5 g NaCl/day)",
      "Daily 30-min walk",
      "Avoid alcohol & smoking",
      "Monitor BP at home twice daily",
      "Regular follow-up every 1 month"],
     ["BP measurement both arms", "Lifestyle modification", "CCB/ARB first line", "Aspirin if CVD risk", "Target BP <130/80"],
     "❤️", ["Amlodipine", "Losartan", "Aspirin", "Atorvastatin"]),

    ("red", "CARDIOVASCULAR", "Angina Pectoris (Stable)", "सीने में दर्द, परिश्रम पर बढ़ता है",
     [("Tab. Aspirin", "75 mg", "OD after food", "Lifelong"),
      ("Tab. Metoprolol", "25 mg", "BD", "Lifelong"),
      ("GTN Spray / Tab", "0.5 mg sublingual", "SOS chest pain", "PRN"),
      ("Tab. Atorvastatin", "40 mg", "OD night", "Lifelong")],
     ["Carry GTN spray at all times",
      "Avoid strenuous activity",
      "Call emergency if pain > 20 min",
      "Stress ECG + Echo evaluation",
      "Cardiology referral for coronary angiography"],
     ["ECG + Troponin", "Aspirin + Statin", "Beta-blocker", "GTN SOS", "Cardiology referral"],
     "💓", ["Aspirin", "Metoprolol", "GTN", "Atorvastatin"]),

    ("red", "CARDIOVASCULAR", "Rheumatic Fever (Acute)", "जोड़ों में दर्द, बुखार, हृदय की धड़कन",
     [("Inj. Benzathine Penicillin G", "1.2 MU IM", "Single dose", "1 day"),
      ("Tab. Aspirin", "75–100 mg/kg/day", "In 4 divided doses", "4–8 weeks"),
      ("Tab. Prednisolone", "2 mg/kg/day (if carditis)", "OD", "2–4 weeks tapering"),
      ("Inj. Benzathine Pen G (prophylaxis)", "1.2 MU IM", "Every 3–4 weeks", "5–10 years")],
     ["Complete bed rest in acute phase",
      "Echo for cardiac involvement",
      "Secondary prophylaxis is mandatory",
      "Dental care – avoid infections",
      "Rheumatology referral"],
     ["Jones criteria", "Eradicate strep (Penicillin)", "Aspirin (anti-inflammatory)", "Steroid if carditis", "Long-term prophylaxis"],
     "🫀", ["Benzathine Penicillin", "Aspirin", "Prednisolone"]),

    # ═══════ CNS ═══════
    ("purple", "CNS / NEUROLOGY", "Tension Headache", "सिरदर्द (कसाव जैसा), दोनों तरफ",
     [("Tab. Paracetamol", "650 mg", "TDS SOS", "3 days"),
      ("Tab. Ibuprofen", "400 mg", "TDS after food", "3 days"),
      ("Tab. Amitriptyline", "10 mg", "OD night (prophylaxis)", "30 days"),
      ("Tab. Diazepam", "2.5 mg", "OD night (muscle tension)", "5 days")],
     ["Identify triggers (stress, poor posture)",
      "Regular sleep schedule",
      "Neck & shoulder muscle exercises",
      "Avoid analgesic overuse (max 2 days/week)",
      "Neurology referral if red-flag symptoms"],
     ["Exclude secondary causes", "Acute: NSAID / Paracetamol", "Prophylaxis: Amitriptyline", "Stress management", "Physiotherapy"],
     "🧠", ["Paracetamol", "Ibuprofen", "Amitriptyline"]),

    ("purple", "CNS / NEUROLOGY", "Migraine", "एक तरफ तेज धड़कता सिरदर्द, जी मिचलाना",
     [("Tab. Sumatriptan", "50 mg", "Single dose at onset, repeat after 2h", "PRN"),
      ("Tab. Metoclopramide", "10 mg", "TDS (nausea)", "3 days"),
      ("Tab. Propranolol", "40 mg", "BD (prophylaxis)", "3 months"),
      ("Tab. Paracetamol", "1000 mg", "SOS", "PRN")],
     ["Rest in dark quiet room during attack",
      "Apply cold compress to forehead",
      "Maintain migraine diary (triggers)",
      "Avoid triggers: cheese, alcohol, stress",
      "Avoid overuse of triptans (max 9 days/month)"],
     ["ICHD-3 criteria", "Acute: Triptan + Antiemetic", "Prophylaxis if >4/month", "Trigger avoidance", "Neurology if atypical"],
     "🔮", ["Sumatriptan", "Propranolol", "Metoclopramide"]),

    ("purple", "CNS / NEUROLOGY", "Seizure (First / Epilepsy)", "दौरे पड़ना, बेहोशी",
     [("Tab. Phenytoin", "100 mg", "TDS", "Long-term"),
      ("Tab. Valproate", "500 mg", "BD", "Long-term"),
      ("Inj. Diazepam", "10 mg IV/PR (acute)", "SOS", "Acute episode"),
      ("Tab. Levetiracetam", "500 mg", "BD (alternative)", "Long-term")],
     ["Do NOT drive, swim alone, cook on open fire",
      "Never skip medication",
      "MRI brain + EEG mandatory",
      "Educate family on first aid",
      "Neurology referral"],
     ["First seizure workup (MRI/EEG)", "Acute: IV Diazepam", "Maintenance AED", "Valproate or Phenytoin", "Specialist follow-up"],
     "⚡", ["Valproate", "Phenytoin", "IV Diazepam"]),

    ("purple", "CNS / NEUROLOGY", "Syncope (Vasovagal)", "अचानक बेहोशी, आँखों के आगे अँधेरा",
     [("ORS / IV Fluids", "Hydration", "As needed", "Acute"),
      ("Tab. Fludrocortisone", "0.1 mg", "OD (if recurrent)", "3 months"),
      ("Tab. Salt supplementation", "Extra 2 g NaCl/day", "OD", "Ongoing"),
      ("Tab. Midodrine", "5 mg", "TDS (severe cases)", "As directed")],
     ["Lie flat and elevate legs during episode",
      "Avoid prolonged standing",
      "Increase salt and fluid intake",
      "Avoid hot environments",
      "ECG mandatory to rule out cardiac cause"],
     ["Rule out cardiac syncope (ECG)", "Tilt-table test", "Hydration + Salt", "Counter-pressure manoeuvres", "Fludrocortisone if refractory"],
     "😵", ["IV Fluids", "Fludrocortisone", "Midodrine"]),

    # ═══════ MUSCULOSKELETAL ═══════
    ("green", "MUSCULOSKELETAL", "Acute Low Back Pain", "कमर दर्द, उठने-बैठने में तकलीफ",
     [("Tab. Diclofenac", "50 mg", "TDS after food", "5 days"),
      ("Tab. Thiocolchicoside", "4 mg", "BD", "5 days"),
      ("Tab. Pantoprazole", "40 mg", "OD (gastric cover)", "5 days"),
      ("Diclofenac Gel (local)", "Apply locally", "BD–TDS", "7 days")],
     ["Avoid bed rest > 2 days",
      "Hot fomentation twice daily",
      "Physiotherapy & core strengthening",
      "Maintain lumbar lordosis",
      "MRI if neurological deficit"],
     ["Rule out red flags", "NSAID + muscle relaxant", "Gastric protection", "Local gel", "Physiotherapy referral"],
     "🦴", ["Diclofenac", "Thiocolchicoside", "Pantoprazole"]),

    ("green", "MUSCULOSKELETAL", "Cervical Spondylitis", "गर्दन दर्द, हाथ में सुन्नपन",
     [("Tab. Etoricoxib", "60 mg", "OD after food", "7 days"),
      ("Tab. Pregabalin", "75 mg", "BD", "2 weeks"),
      ("Tab. Thiocolchicoside", "4 mg", "BD", "5 days"),
      ("Tab. Calcium + Vit D3", "500 mg / 400 IU", "OD", "3 months")],
     ["Cervical collar during acute phase",
      "No sudden neck movements",
      "Cervical traction under physio guidance",
      "MRI cervical spine if radiculopathy",
      "Neurosurgery if myelopathy"],
     ["MRI C-spine", "NSAID (Cox-2)", "Neuropathic agent (Pregabalin)", "Physiotherapy", "Surgical referral if severe"],
     "🦾", ["Etoricoxib", "Pregabalin", "Calcium+VitD3"]),

    ("green", "MUSCULOSKELETAL", "Sprain (Ankle / Knee)", "मोच, सूजन, दर्द",
     [("Tab. Ibuprofen", "400 mg", "TDS after food", "5 days"),
      ("Tab. Pantoprazole", "40 mg", "OD (gastric cover)", "5 days"),
      ("Diclofenac + Methyl Salicylate Gel", "Apply locally", "TDS", "7 days"),
      ("Crepe Bandage", "Compression wrap", "Continuous", "5–7 days")],
     ["RICE: Rest, Ice, Compression, Elevation",
      "Ice pack 20 min every 4 hours (first 48 hrs)",
      "Non-weight bearing if severe",
      "X-ray to rule out fracture",
      "Physiotherapy after acute phase"],
     ["Ottawa rules (X-ray?)", "RICE protocol", "NSAID oral + topical", "Compression + elevation", "Physiotherapy"],
     "🦵", ["Ibuprofen", "Diclofenac Gel", "Crepe Bandage"]),

    ("green", "MUSCULOSKELETAL", "Gout (Acute Attack)", "अँगूठे/जोड़ में तेज दर्द, लालिमा, सूजन",
     [("Tab. Colchicine", "0.5 mg", "BD", "7 days"),
      ("Tab. Indomethacin", "50 mg", "TDS after food", "5 days"),
      ("Tab. Allopurinol", "100 mg", "OD (after acute settles)", "Lifelong"),
      ("Tab. Pantoprazole", "40 mg", "OD", "7 days")],
     ["Avoid purine-rich foods (red meat, organ meat, alcohol)",
      "Drink 2–3 L water daily",
      "No Aspirin (raises uric acid)",
      "Start Allopurinol only after acute attack subsides",
      "Check serum uric acid + renal function"],
     ["Serum uric acid + synovial fluid", "Colchicine acute phase", "NSAID alternative", "Allopurinol (maintenance)", "Diet counselling"],
     "⚡", ["Colchicine", "Indomethacin", "Allopurinol"]),

    # ═══════ SKIN ═══════
    ("amber", "DERMATOLOGY", "Fungal Skin Infection (Tinea)", "चमड़ी पर खुजली, गोलाकार चकत्ते",
     [("Tab. Fluconazole", "150 mg", "Once weekly", "4–8 weeks"),
      ("Clotrimazole Cream 1%", "Apply to affected area", "BD", "4 weeks"),
      ("Tab. Cetirizine", "10 mg", "OD night (itching)", "2 weeks"),
      ("Candid powder", "Dust on area", "OD", "4 weeks")],
     ["Keep skin dry – especially skin folds",
      "Separate towel, undergarments",
      "No shared clothing",
      "Avoid steroid-only creams (worsens fungal)",
      "Treat nail infection with oral terbinafine"],
     ["KOH mount (confirm fungal)", "Topical antifungal (Clotrimazole)", "Oral antifungal if extensive", "Antihistamine for itch", "Hygiene education"],
     "🍄", ["Fluconazole", "Clotrimazole Cream", "Cetirizine"]),

    ("amber", "DERMATOLOGY", "Scabies", "रात में खुजली, उँगलियों के बीच दाने",
     [("Permethrin Cream 5%", "Apply neck-to-toe, wash after 8 hrs", "Repeat after 7 days", "2 applications"),
      ("Tab. Ivermectin", "200 mcg/kg", "Single dose (repeat 1 week)", "2 doses"),
      ("Tab. Cetirizine", "10 mg", "OD night", "2 weeks"),
      ("Calamine lotion", "Apply to itchy areas", "BD", "2 weeks")],
     ["Treat all household contacts simultaneously",
      "Wash all clothing/bedding in hot water",
      "Nails must be cut short",
      "Itching may persist 2–4 weeks after treatment (post-scabetic itch)",
      "Norwegian scabies – crusted lesions, more contagious"],
     ["Burrow ink test / dermoscopy", "Permethrin 5% (whole body)", "Oral Ivermectin", "Antihistamine for itch", "Household treatment"],
     "🦟", ["Permethrin 5%", "Ivermectin", "Cetirizine"]),

    ("amber", "DERMATOLOGY", "Abscess (Skin)", "फोड़ा, दर्द, सूजन, पस",
     [("Tab. Amoxicillin-Clavulanate", "625 mg", "TDS", "7 days"),
      ("Tab. Metronidazole", "400 mg", "TDS", "7 days"),
      ("Tab. Ibuprofen", "400 mg", "TDS after food", "5 days"),
      ("Betadine Dressing", "Daily wound care", "OD", "Till healed")],
     ["Incision & Drainage is definitive treatment",
      "Do NOT squeeze abscess",
      "Daily dressing with antiseptic",
      "Pus culture & sensitivity",
      "Diabetic patients – aggressive treatment, check HbA1c"],
     ["Clinical diagnosis", "I&D (definitive)", "Antibiotics post-I&D", "Daily dressing", "Culture & sensitivity"],
     "🩹", ["Amoxiclav", "Metronidazole", "Betadine"]),

    ("amber", "DERMATOLOGY", "Urticaria (Hives)", "अचानक शरीर पर लाल चकत्ते, खुजली",
     [("Tab. Cetirizine", "10 mg", "OD", "2 weeks"),
      ("Tab. Hydroxyzine", "25 mg", "TDS (severe)", "5 days"),
      ("Tab. Prednisolone", "20 mg", "OD (acute severe urticaria)", "5 days"),
      ("Inj. Chlorphenamine + Hydrocortisone IV", "IM/IV", "SOS (anaphylaxis)", "Emergency only")],
     ["Identify and avoid allergen / trigger",
      "Antihistamine must be taken regularly (not SOS only)",
      "Avoid NSAIDs, ACE inhibitors",
      "Keep Epipen if history of anaphylaxis",
      "Chronic urticaria: ANA, thyroid antibodies, C3/C4"],
     ["Identify trigger", "2nd gen antihistamine (Cetirizine)", "Hydroxyzine if severe", "Steroid short course", "Epipen if anaphylaxis risk"],
     "🌸", ["Cetirizine", "Hydroxyzine", "Prednisolone"]),

    # ═══════ ENT ═══════
    ("indigo", "ENT", "Acute Otitis Media", "कान में दर्द, बुखार, सुनाई कम देना",
     [("Tab. Amoxicillin", "500 mg", "TDS", "7 days"),
      ("Tab. Paracetamol", "650 mg", "TDS", "3 days"),
      ("Ear drops (Ciprofloxacin + Dex)", "3 drops", "TDS", "7 days"),
      ("Nasal Saline Drops", "2 drops each nostril", "QID", "7 days")],
     ["Do NOT insert anything into the ear",
      "Avoid water entry in ear",
      "Complete antibiotic course",
      "Audiometry if hearing loss persists",
      "ENT referral if no improvement in 72 hrs"],
     ["Otoscopy (bulging TM)", "Analgesic", "Amoxicillin 7 days", "Ear drops", "ENT referral if ruptured TM"],
     "👂", ["Amoxicillin", "Ciproflox Ear Drops", "Paracetamol"]),

    ("indigo", "ENT", "Sinusitis (Acute Bacterial)", "नाक बंद, माथे/गाल में दर्द, पीला-हरा बलगम",
     [("Tab. Amoxicillin-Clavulanate", "625 mg", "TDS", "7–10 days"),
      ("Tab. Cetirizine", "10 mg", "OD night", "7 days"),
      ("Nasal Fluticasone Spray", "2 sprays each nostril", "OD morning", "4 weeks"),
      ("Tab. Paracetamol", "500 mg", "TDS", "5 days")],
     ["Steam inhalation 2–3x/day",
      "Saline nasal irrigation (Jala neti)",
      "Avoid diving, air travel during acute phase",
      "X-ray PNS (Water's view) or CT PNS",
      "ENT referral for recurrent sinusitis"],
     ["Clinical + X-ray PNS", "Antibiotic 10 days", "Antihistamine", "Nasal steroid spray", "ENT for recurrent cases"],
     "👃", ["Amoxiclav", "Fluticasone Nasal", "Cetirizine"]),

    ("indigo", "ENT", "Acute Tonsillitis", "टॉन्सिल पर सफेद धब्बे, गले में तेज दर्द, बुखार",
     [("Tab. Amoxicillin", "500 mg", "TDS", "10 days"),
      ("Tab. Paracetamol", "650 mg", "TDS", "5 days"),
      ("Betadine Gargle", "15 ml in water", "TDS", "7 days"),
      ("Lozenge (Strepsils Warm)", "1 lozenge", "4-hrly", "5 days")],
     ["Throat swab for culture & sensitivity",
      "Ice cream / cold fluids for soothing",
      "Complete antibiotic course (10 full days)",
      "Tonsillectomy if >6 episodes/year",
      "Watch for peritonsillar abscess (trismus, muffled voice)"],
     ["Tonsillar exudate → Amoxicillin 10 days", "Analgesic + antipyretic", "Gargles", "Throat swab C/S", "ENT for recurrent/peritonsillar abscess"],
     "🤒", ["Amoxicillin", "Betadine Gargle", "Paracetamol"]),

    # ═══════ PEDIATRICS ═══════
    ("sky", "PEDIATRICS", "Pediatric Fever", "बच्चे को बुखार, चिड़चिड़ापन",
     [("Syp. Paracetamol", "15 mg/kg/dose", "Q4–6h SOS", "3 days"),
      ("Syp. Ibuprofen", "10 mg/kg/dose", "Q6–8h (>6 months)", "3 days"),
      ("ORS", "As needed", "After each loose stool if diarrhea", "Till resolved"),
      ("Tab./Syp. Cetirizine", "0.25 mg/kg/day", "OD night (if allergic)", "3 days")],
     ["Tepid sponging for temp >39°C",
      "Adequate fluids & breastfeeding continue",
      "Emergency if: seizure, altered sensorium, purple rash",
      "Blood CBC + Malaria card if fever >3 days",
      "Do NOT use aspirin in children"],
     ["Assess hydration & sensorium", "Paracetamol (weight-based)", "ORS if dehydrated", "Investigate if >3 days", "Hospital if red flags"],
     "🧒", ["Paracetamol Syrup", "ORS", "Ibuprofen Syrup"]),

    ("sky", "PEDIATRICS", "Pediatric Diarrhea", "बच्चे को दस्त, कमजोरी, पेट दर्द",
     [("ORS", "75 ml/kg in 4 hrs (mild-mod dehydration)", "Frequent sips", "Till resolved"),
      ("Syp. Zinc", "20 mg OD (>6 months)", "OD", "14 days"),
      ("Syp. Metronidazole", "10 mg/kg TDS (if amoebic/giardia)", "TDS", "5 days"),
      ("Probiotics (Lactobacillus)", "1 sachet", "BD", "5 days")],
     ["Continue breastfeeding",
      "BRAT diet for older children",
      "Stool exam if bloody / persistent",
      "IV fluids if unable to take orally",
      "Admit if severe dehydration signs (sunken eyes, skin pinch)"],
     ["Assess dehydration severity", "ORS Plan A/B/C", "Zinc 14 days", "Stool exam", "IV if severe"],
     "🍼", ["ORS", "Zinc Syrup", "Probiotics"]),

    ("sky", "PEDIATRICS", "Pediatric Pneumonia", "बच्चे को तेज बुखार, साँस तेज चलना, खाँसी",
     [("Syp. Amoxicillin", "40 mg/kg/day in 3 doses", "TDS", "5 days"),
      ("Syp. Azithromycin", "10 mg/kg/day", "OD", "3 days"),
      ("Syp. Salbutamol", "0.1–0.15 mg/kg/dose", "TDS (if wheeze)", "3–5 days"),
      ("Syp. Paracetamol", "15 mg/kg/dose", "Q4-6h", "3 days")],
     ["Count respiratory rate for 60 full seconds",
      "Admit if RR >50/min (age 2-12m), >40/min (1-5y) or SpO2 <90%",
      "Oxygen via nasal prongs if SpO2 <94%",
      "CXR & CBC mandatory",
      "Watch for ARDS / empyema"],
     ["WHO IMCI criteria", "O2 if SpO2<94%", "Amoxicillin (mild–mod)", "IV if severe", "CXR + follow-up"],
     "🏥", ["Amoxicillin Syrup", "Azithromycin", "Salbutamol"]),

    ("sky", "PEDIATRICS", "Bronchiolitis (Infant)", "शिशु को घरघराहट, साँस लेने में तकलीफ",
     [("Hypertonic Saline Nebulisation (3%)", "4 ml", "TDS", "3 days"),
      ("O2 via nasal prongs", "1–2 L/min", "Continuous if SpO2<94%", "Till resolved"),
      ("Salbutamol Neb", "0.15 mg/kg in NS", "TDS (trial)", "2 days"),
      ("Syp. Paracetamol", "15 mg/kg", "Q6h SOS (fever)", "3 days")],
     ["Nasopharyngeal suction as needed",
      "Upright positioning (30-45 degrees)",
      "Avoid exposure to cigarette smoke",
      "No antibiotics unless secondary bacterial infection",
      "Admit if apnea, cyanosis, feeding < 50% normal"],
     ["RSV season check", "O2 support", "Hypertonic saline neb", "Nasopharyngeal suction", "Admit if apnoea/poor feeding"],
     "👶", ["Hypertonic Saline", "O2 Therapy", "Salbutamol Neb"]),

    # ═══════ OBG ═══════
    ("purple", "OBG (OBSTETRICS & GYNECOLOGY)", "Hyperemesis Gravidarum", "गर्भावस्था में अत्यधिक उल्टी",
     [("Tab. Ondansetron", "4 mg", "TDS", "7 days"),
      ("Tab. Pyridoxine (B6)", "25 mg", "TDS", "4 weeks"),
      ("Inj. Metoclopramide IV", "10 mg IV", "TDS (if severe)", "2–3 days"),
      ("IV Fluids (Ringer's Lactate)", "1–2 L IV", "Over 4–6 hrs", "As needed")],
     ["Small frequent meals",
      "Avoid strong smells/triggers",
      "IV hydration if unable to keep fluids down",
      "Check urine ketones",
      "Admit if weight loss > 5% body weight"],
     ["Exclude molar pregnancy (USG)", "Pyridoxine + Antiemetic", "IV fluids if dehydrated", "Urine ketones monitoring", "Admit if severe"],
     "🤰", ["Ondansetron", "Pyridoxine B6", "IV Fluids"]),

    ("purple", "OBG (OBSTETRICS & GYNECOLOGY)", "Pre-eclampsia", "गर्भावस्था में बीपी बढ़ना, पैरों में सूजन",
     [("Tab. Methyldopa", "250 mg", "BD–TDS", "Till delivery"),
      ("Tab. Labetalol", "100 mg", "BD (alternative)", "Till delivery"),
      ("Inj. Magnesium Sulfate", "4 g IV loading + 1 g/hr", "IV infusion", "24 hrs post-delivery"),
      ("Tab. Aspirin", "75–150 mg", "OD at night", "From 12 weeks (prevention)")],
     ["Admit if BP > 160/110 mmHg",
      "Fetal monitoring (CTG) daily",
      "Urine dipstick for proteinuria",
      "Low-dose aspirin from 12 weeks for high-risk",
      "Definitive treatment is delivery (>37 weeks)"],
     ["BP >140/90 + proteinuria", "Antihypertensive (Methyldopa)", "MgSO4 (seizure prophylaxis)", "Fetal monitoring", "Delivery planning"],
     "🩺", ["Methyldopa", "MgSO4", "Aspirin"]),

    ("purple", "OBG (OBSTETRICS & GYNECOLOGY)", "Dysmenorrhea (Painful Periods)", "मासिक धर्म में तेज दर्द",
     [("Tab. Mefenamic Acid", "500 mg", "TDS after food", "3–5 days"),
      ("Tab. Ibuprofen", "400 mg", "TDS after food", "3 days"),
      ("Tab. Hyoscine Butylbromide", "10 mg", "TDS", "3 days"),
      ("OCP (Yasmin / Loette)", "1 tab OD", "Day 1–21 of cycle", "3–6 months (secondary)")],
     ["Hot water bottle to lower abdomen",
      "Mild exercise (yoga, walking)",
      "NSAIDs most effective if taken 1 day before period",
      "Pelvic USG to rule out endometriosis / fibroids",
      "Gynaecology referral for secondary dysmenorrhea"],
     ["Primary vs secondary (USG)", "NSAIDs first-line", "Antispasmodic", "OCP if refractory", "Laparoscopy if endometriosis"],
     "🌺", ["Mefenamic Acid", "Ibuprofen", "Hyoscine"]),

    # ═══════ EMERGENCY ═══════
    ("red", "EMERGENCY", "Anaphylaxis", "अचानक साँस फूलना, पित्ती, बीपी गिरना (एलर्जी)",
     [("Inj. Adrenaline (Epinephrine)", "0.5 ml of 1:1000 IM thigh", "Repeat after 5 min if needed", "Emergency"),
      ("Inj. Chlorphenamine", "10 mg IM/IV", "Once", "Emergency"),
      ("Inj. Hydrocortisone", "200 mg IV", "Once", "Emergency"),
      ("IV Normal Saline", "500 ml–1L", "Rapid infusion", "Emergency")],
     ["Position: Lay flat, legs raised (if no breathing difficulty)",
      "O2 high-flow 15 L/min via mask",
      "Call emergency services immediately",
      "Auto-injector Epipen 0.3 mg IM for next episode",
      "Observe minimum 4–6 hours post reaction"],
     ["ABCDE assessment", "Adrenaline IM (thigh) IMMEDIATELY", "O2 15L/min", "IV fluids + Antihistamine + Steroid", "Observe 4-6 hrs"],
     "🚨", ["Adrenaline 1:1000", "Hydrocortisone IV", "Chlorphenamine"]),

    ("red", "EMERGENCY", "Hypoglycemia", "चक्कर, पसीना, हाथ काँपना, शुगर कम होना",
     [("Glucose 25 g (D25 50 ml IV)", "50 ml D25%", "IV bolus", "Immediate"),
      ("Tab. Glucose / Sugar", "4–5 glucose tablets or 150 ml juice (if conscious)", "Oral immediately", "Immediate"),
      ("Inj. Glucagon", "1 mg IM/SC", "If unconscious (no IV access)", "Emergency"),
      ("Dextrose 10% infusion", "250 ml/hr", "Maintenance IV", "Till stable")],
     ["Check capillary blood glucose immediately",
      "If conscious: give 15 g fast carbohydrate, recheck in 15 min",
      "Never give oral glucose to unconscious patient",
      "Identify cause: excess insulin, skipped meal, alcohol",
      "Adjust antidiabetic medication dosing"],
     ["CBG stat", "If conscious: oral glucose", "If unconscious: D25 IV bolus", "Glucagon IM (no IV access)", "Investigate & adjust Rx"],
     "🍬", ["D25 IV", "Glucose Tablets", "Glucagon"]),

    ("red", "EMERGENCY", "Acute Asthmatic Emergency", "अस्थमा का तीव्र दौरा, बोल न पाना",
     [("Salbutamol Nebulisation", "2.5–5 mg in NS", "Q20 min x3, then hourly", "Emergency"),
      ("Inj. Hydrocortisone", "200 mg IV", "Q6h", "24–48 hrs"),
      ("Ipratropium Nebulisation", "0.5 mg", "Q20 min x3", "Emergency"),
      ("O2 via Venturi mask", "24–28% FiO2", "Continuous", "Till SpO2 >94%")],
     ["Sit upright – never lay flat",
      "Peak flow <33% of best = life-threatening",
      "Call for ICU/ventilator if no response in 20 min",
      "IV Magnesium Sulfate 1.2–2 g if severe",
      "Intubation if silent chest / exhaustion"],
     ["SpO2 + PEFR", "O2 titrated", "SABA + SAMA neb", "IV Hydrocortisone", "ICU if no response"],
     "🆘", ["Salbutamol Neb", "Hydrocortisone IV", "Ipratropium"]),
]

# ─────────────────────────────────────────────────────────────────────────────
# DRAWING HELPERS
# ─────────────────────────────────────────────────────────────────────────────

def hex_to_rgb_01(hex_color):
    c = hex_color.lstrip('#')
    r, g, b = int(c[0:2],16)/255, int(c[2:4],16)/255, int(c[4:6],16)/255
    return r, g, b

SYSTEM_COLORS = {
    "sky":    ("deep_blue", "light_blue", "#1A237E", "#E3F2FD"),
    "red":    ("red",       "light_red",  "#C62828", "#FFEBEE"),
    "teal":   ("teal",      "light_teal", "#00695C", "#E0F2F1"),
    "purple": ("purple",    "light_purple","#6A1B9A","#F3E5F5"),
    "green":  ("green",     "light_green", "#2E7D32","#E8F5E9"),
    "amber":  ("amber",     "light_amber", "#FF6F00","#FFF8E1"),
    "indigo": ("indigo",    "light_indigo","#283593","#E8EAF6"),
}

def draw_rounded_rect(c, x, y, w, h, r=8, fill=None, stroke=None, lw=1):
    c.saveState()
    if fill:
        c.setFillColor(fill)
    if stroke:
        c.setStrokeColor(stroke)
    c.setLineWidth(lw)
    path = c.beginPath()
    path.moveTo(x+r, y)
    path.lineTo(x+w-r, y)
    path.arcTo(x+w-r*2, y, x+w, y+r*2, -90, 90)  # BL corner (PDF y-up)
    # actually use curveTo for portability
    c.restoreState()
    # simpler: use roundRect
    c.saveState()
    if fill:
        c.setFillColor(fill)
    if stroke:
        c.setStrokeColor(stroke)
    else:
        c.setStrokeColor(colors.transparent)
    c.setLineWidth(lw)
    c.roundRect(x, y, w, h, r, stroke=1 if stroke else 0, fill=1 if fill else 0)
    c.restoreState()

def draw_pill(c, x, y, w, h, bg_color, text, font="Helvetica-Bold", fsize=7, text_color=colors.white):
    draw_rounded_rect(c, x, y, w, h, r=h/2, fill=bg_color)
    c.saveState()
    c.setFont(font, fsize)
    c.setFillColor(text_color)
    c.drawCentredString(x + w/2, y + h*0.28, text)
    c.restoreState()

def draw_arrow_flow(c, items, x_start, y, box_w, box_h, accent_color):
    """Draw horizontal treatment flow boxes with arrows"""
    gap = 6
    n = len(items)
    total = n * box_w + (n-1) * gap
    x = x_start + (W - 2*x_start - total) / 2  # center it

    for i, item in enumerate(items):
        bx = x + i*(box_w + gap)
        # shadow
        draw_rounded_rect(c, bx+1.5, y-1.5, box_w, box_h, r=6,
                          fill=colors.HexColor("#CCCCCC"))
        draw_rounded_rect(c, bx, y, box_w, box_h, r=6,
                          fill=accent_color)
        # step number circle
        c.saveState()
        c.setFillColor(colors.white)
        c.circle(bx + 10, y + box_h - 9, 7, stroke=0, fill=1)
        c.setFont("Helvetica-Bold", 7)
        c.setFillColor(accent_color)
        c.drawCentredString(bx + 10, y + box_h - 12, str(i+1))
        c.restoreState()
        # text
        c.saveState()
        c.setFont("Helvetica-Bold", 6.8)
        c.setFillColor(colors.white)
        # word wrap manually
        words = item.split()
        lines, cur = [], ""
        for w_text in words:
            test = (cur + " " + w_text).strip()
            if c.stringWidth(test, "Helvetica-Bold", 6.8) < box_w - 10:
                cur = test
            else:
                lines.append(cur)
                cur = w_text
        if cur:
            lines.append(cur)
        total_h = len(lines) * 9
        start_y = y + (box_h - total_h) / 2 + (len(lines)-1)*9/2
        for li, line in enumerate(lines):
            c.drawCentredString(bx + box_w/2, start_y - li*9, line)
        c.restoreState()
        # arrow
        if i < n - 1:
            ax = bx + box_w + 1
            ay = y + box_h/2
            c.saveState()
            c.setFillColor(accent_color)
            c.setStrokeColor(accent_color)
            c.setLineWidth(1.5)
            c.line(ax, ay, ax+gap-1, ay)
            # arrowhead
            c.setLineWidth(0)
            path = c.beginPath()
            path.moveTo(ax+gap-1, ay)
            path.lineTo(ax+gap-5, ay+3)
            path.lineTo(ax+gap-5, ay-3)
            path.close()
            c.drawPath(path, fill=1, stroke=0)
            c.restoreState()

def draw_medicine_icons(c, drugs, x, y, accent_color, light_color):
    """Draw stylised medicine icon cards"""
    card_w, card_h = 80, 55
    gap = 8
    for i, drug in enumerate(drugs[:4]):
        cx = x + i*(card_w + gap)
        # card background
        draw_rounded_rect(c, cx, y, card_w, card_h, r=8,
                          fill=colors.HexColor(light_color),
                          stroke=accent_color, lw=1.2)
        # medicine symbol
        sym_bg = colors.HexColor(accent_color)
        c.saveState()
        c.setFillColor(sym_bg)
        # Rx symbol background circle
        c.circle(cx + card_w/2, y + card_h - 17, 12, stroke=0, fill=1)
        c.setFont("Helvetica-Bold", 12)
        c.setFillColor(colors.white)
        c.drawCentredString(cx + card_w/2, y + card_h - 21, "Rx")
        c.restoreState()
        # drug name
        c.saveState()
        c.setFont("Helvetica-Bold", 6.5)
        c.setFillColor(colors.HexColor(accent_color))
        # wrap
        words = drug.split()
        lines, cur = [], ""
        for w_text in words:
            test = (cur + " " + w_text).strip()
            if c.stringWidth(test, "Helvetica-Bold", 6.5) < card_w - 8:
                cur = test
            else:
                lines.append(cur); cur = w_text
        if cur: lines.append(cur)
        for li, line in enumerate(lines[:2]):
            c.drawCentredString(cx + card_w/2, y + 20 - li*9, line)
        c.restoreState()
        # decorative dots
        for d in range(3):
            c.saveState()
            c.setFillColor(colors.HexColor(accent_color))
            c.circle(cx + 15 + d*8, y + 8, 2.5, stroke=0, fill=1)
            c.restoreState()

# ─────────────────────────────────────────────────────────────────────────────
# PAGE RENDERER
# ─────────────────────────────────────────────────────────────────────────────

def draw_page(c, case, page_num, total_pages):
    (color_key, system, title_en, co_hindi,
     rx, advice, flow, emoji, drug_icons) = case

    _, _, accent_hex, light_hex = SYSTEM_COLORS[color_key]
    accent_color = colors.HexColor(accent_hex)
    light_color_obj = colors.HexColor(light_hex)

    M = 18*mm   # margin
    cw = W - 2*M

    # ── background ──────────────────────────────────────────────────────────
    c.setFillColor(CLR["paper"])
    c.rect(0, 0, W, H, stroke=0, fill=1)

    # diagonal watermark strip
    c.saveState()
    c.setFillColor(light_color_obj)
    c.setStrokeColor(colors.transparent)
    # subtle top-right triangle
    path = c.beginPath()
    path.moveTo(W-120, H)
    path.lineTo(W, H)
    path.lineTo(W, H-120)
    path.close()
    c.drawPath(path, fill=1, stroke=0)
    c.restoreState()

    # ── HEADER BANNER ───────────────────────────────────────────────────────
    banner_h = 72
    draw_rounded_rect(c, M, H-M-banner_h, cw, banner_h, r=10,
                      fill=accent_color)

    # left: system badge
    badge_w = 120
    draw_rounded_rect(c, M+8, H-M-banner_h+8, badge_w, 20, r=10,
                      fill=colors.white)
    c.saveState()
    c.setFont("Helvetica-Bold", 7.5)
    c.setFillColor(accent_color)
    sys_text = system
    c.drawCentredString(M+8+badge_w/2, H-M-banner_h+13, sys_text)
    c.restoreState()

    # emoji
    c.saveState()
    c.setFont("Helvetica", 22)
    c.setFillColor(colors.white)
    c.drawString(M+12, H-M-banner_h+34, emoji)
    c.restoreState()

    # title
    c.saveState()
    c.setFont("Helvetica-Bold", 18)
    c.setFillColor(colors.white)
    c.drawString(M+50, H-M-22, title_en)
    c.restoreState()

    # page number
    c.saveState()
    c.setFont("Helvetica", 8)
    c.setFillColor(colors.white)
    c.drawRightString(M+cw-10, H-M-14, f"Page {page_num}/{total_pages}")
    c.restoreState()

    # Hindi C/O
    c.saveState()
    c.setFont(HINDI_FONT, 10.5)
    c.setFillColor(colors.white)
    c.drawString(M+50, H-M-42, f"C/O :  {co_hindi}")
    c.restoreState()

    # ── SECTION LAYOUT (2 columns) ──────────────────────────────────────────
    col_gap = 10
    left_w = cw * 0.58
    right_w = cw - left_w - col_gap
    left_x = M
    right_x = M + left_w + col_gap
    section_top = H - M - banner_h - 8

    # ── LEFT: Prescription ──────────────────────────────────────────────────
    rx_label_y = section_top - 16
    # Section heading
    draw_rounded_rect(c, left_x, rx_label_y-2, left_w, 18, r=5,
                      fill=accent_color)
    c.saveState()
    c.setFont("Helvetica-Bold", 9)
    c.setFillColor(colors.white)
    c.drawString(left_x+8, rx_label_y+3, "⚕  Rx  PRESCRIPTION")
    c.restoreState()

    # Table header
    th_y = rx_label_y - 22
    col_drug = left_w * 0.38
    col_dose = left_w * 0.22
    col_freq = left_w * 0.22
    col_dur  = left_w * 0.18

    draw_rounded_rect(c, left_x, th_y-2, left_w, 16, r=4,
                      fill=light_color_obj)
    c.saveState()
    c.setFont("Helvetica-Bold", 7.5)
    c.setFillColor(colors.HexColor(accent_hex))
    headers = ["Drug / Medicine", "Dose", "Frequency", "Duration"]
    xs = [left_x+4, left_x+col_drug, left_x+col_drug+col_dose, left_x+col_drug+col_dose+col_freq]
    for hi, hdr in enumerate(headers):
        c.drawString(xs[hi], th_y+2, hdr)
    c.restoreState()

    # table rows
    row_h = 23
    for ri, (drug, dose, freq, duration) in enumerate(rx):
        ry = th_y - 6 - (ri+1)*row_h
        # alternating row
        if ri % 2 == 0:
            draw_rounded_rect(c, left_x, ry-2, left_w, row_h-2, r=3,
                              fill=colors.HexColor("#F8F9FA"))
        # row number circle
        c.saveState()
        c.setFillColor(accent_color)
        c.circle(left_x+8, ry+row_h/2-4, 6, stroke=0, fill=1)
        c.setFont("Helvetica-Bold", 6)
        c.setFillColor(colors.white)
        c.drawCentredString(left_x+8, ry+row_h/2-7, str(ri+1))
        c.restoreState()
        # data
        c.saveState()
        c.setFont("Helvetica-Bold", 7.5)
        c.setFillColor(CLR["dark"])
        c.drawString(left_x+18, ry+row_h/2-4, drug[:32])
        c.setFont("Helvetica", 7.5)
        c.drawString(xs[1], ry+row_h/2-4, dose[:18])
        c.drawString(xs[2], ry+row_h/2-4, freq[:18])
        c.drawString(xs[3], ry+row_h/2-4, duration[:14])
        c.restoreState()
        # divider
        c.saveState()
        c.setStrokeColor(colors.HexColor("#E0E0E0"))
        c.setLineWidth(0.4)
        c.line(left_x, ry-2, left_x+left_w, ry-2)
        c.restoreState()

    rx_bottom = th_y - 6 - len(rx)*row_h - 8

    # ── RIGHT: Advice ────────────────────────────────────────────────────────
    adv_label_y = section_top - 16
    draw_rounded_rect(c, right_x, adv_label_y-2, right_w, 18, r=5,
                      fill=CLR["green"])
    c.saveState()
    c.setFont("Helvetica-Bold", 9)
    c.setFillColor(colors.white)
    c.drawString(right_x+8, adv_label_y+3, "✅  Adv.  ADVICE")
    c.restoreState()

    adv_y = adv_label_y - 10
    for ai, adv_item in enumerate(advice):
        adv_y -= 16
        # bullet circle
        c.saveState()
        c.setFillColor(CLR["green"])
        c.circle(right_x+6, adv_y+4, 4, stroke=0, fill=1)
        c.setFont("Helvetica-Bold", 6)
        c.setFillColor(colors.white)
        c.drawCentredString(right_x+6, adv_y+1.5, str(ai+1))
        c.restoreState()
        # text (wrap)
        c.saveState()
        c.setFont("Helvetica", 7.5)
        c.setFillColor(CLR["dark"])
        text = adv_item
        max_w = right_w - 18
        words = text.split()
        lines, cur = [], ""
        for w_text in words:
            test = (cur + " " + w_text).strip()
            if c.stringWidth(test, "Helvetica", 7.5) < max_w:
                cur = test
            else:
                lines.append(cur); cur = w_text
        if cur: lines.append(cur)
        for li, line in enumerate(lines[:2]):
            c.drawString(right_x+14, adv_y - li*8.5, line)
        c.restoreState()
        if len(adv_item.split()) > 8:
            adv_y -= 8

    # ── MEDICINE ICONS SECTION ───────────────────────────────────────────────
    icons_y = min(rx_bottom, adv_y) - 14
    draw_rounded_rect(c, M, icons_y-2, cw, 18, r=5,
                      fill=accent_color)
    c.saveState()
    c.setFont("Helvetica-Bold", 9)
    c.setFillColor(colors.white)
    c.drawString(M+8, icons_y+3, "💊  KEY MEDICINES")
    c.restoreState()
    icons_y -= 65
    draw_medicine_icons(c, drug_icons, M+10, icons_y, accent_hex, light_hex)

    # ── TREATMENT FLOW ───────────────────────────────────────────────────────
    flow_top = icons_y - 14
    draw_rounded_rect(c, M, flow_top-2, cw, 18, r=5,
                      fill=CLR["grey"])
    c.saveState()
    c.setFont("Helvetica-Bold", 9)
    c.setFillColor(colors.white)
    c.drawString(M+8, flow_top+3, "▶  QUICK-VIEW TREATMENT FLOW")
    c.restoreState()

    flow_box_y = flow_top - 52
    n = len(flow)
    box_w = min(88, (cw - (n-1)*6) / n)
    draw_arrow_flow(c, flow, M, flow_box_y, box_w, 44, accent_color)

    # ── FOOTER ───────────────────────────────────────────────────────────────
    footer_y = 12*mm
    c.saveState()
    c.setStrokeColor(colors.HexColor("#BDBDBD"))
    c.setLineWidth(0.6)
    c.line(M, footer_y+8, W-M, footer_y+8)
    c.setFont("Helvetica", 7)
    c.setFillColor(CLR["grey"])
    c.drawString(M, footer_y, "Clinical Quick-Reference Guide  |  For educational & reference use only  |  Always verify doses before prescribing")
    c.setFont("Helvetica-Bold", 7)
    c.setFillColor(accent_color)
    c.drawRightString(W-M, footer_y, system)
    c.restoreState()

    # ── left accent bar ──────────────────────────────────────────────────────
    c.saveState()
    c.setFillColor(accent_color)
    c.rect(0, 0, 5, H, stroke=0, fill=1)
    c.restoreState()

# ─────────────────────────────────────────────────────────────────────────────
# COVER PAGE
# ─────────────────────────────────────────────────────────────────────────────

def draw_cover(c):
    # Background gradient-ish
    c.setFillColor(CLR["deep_blue"])
    c.rect(0, 0, W, H, stroke=0, fill=1)

    # decorative circles
    c.saveState()
    c.setFillColor(colors.HexColor("#283593"))
    c.circle(W-60, H-60, 120, stroke=0, fill=1)
    c.circle(60, 60, 90, stroke=0, fill=1)
    c.circle(W/2, H/2, 200, stroke=0, fill=1)
    c.setFillColor(colors.HexColor("#1A237E"))
    c.circle(W/2, H/2, 180, stroke=0, fill=1)
    c.restoreState()

    # central white card
    card_m = 30
    draw_rounded_rect(c, card_m, 200, W-2*card_m, H-350, r=16,
                      fill=colors.HexColor("#FAFAFA"))

    # red cross / medical symbol
    c.saveState()
    c.setFillColor(colors.HexColor("#C62828"))
    # vertical bar
    c.rect(W/2-10, H-135, 20, 60, stroke=0, fill=1)
    # horizontal bar
    c.rect(W/2-30, H-110, 60, 20, stroke=0, fill=1)
    c.restoreState()

    # Main title
    c.saveState()
    c.setFont("Helvetica-Bold", 28)
    c.setFillColor(CLR["deep_blue"])
    c.drawCentredString(W/2, H-185, "CLINICAL QUICK-REFERENCE")
    c.setFont("Helvetica-Bold", 34)
    c.setFillColor(CLR["red"])
    c.drawCentredString(W/2, H-220, "PRESCRIPTION GUIDE")
    c.restoreState()

    # subtitle
    c.saveState()
    c.setFont(HINDI_FONT, 14)
    c.setFillColor(CLR["grey"])
    c.drawCentredString(W/2, H-250, "नैदानिक त्वरित संदर्भ मार्गदर्शिका")
    c.restoreState()

    # divider
    c.saveState()
    c.setStrokeColor(CLR["red"])
    c.setLineWidth(2)
    c.line(card_m+30, H-265, W-card_m-30, H-265)
    c.restoreState()

    # System list in 2 columns
    systems = [
        ("🤧 Respiratory", "• Cold • Pharyngitis • Bronchitis • Pneumonia • Asthma"),
        ("🚽 Gastrointestinal", "• Diarrhea • Gastritis • Acidity • Worms"),
        ("❤️ Cardiovascular", "• Hypertension • Angina • Rheumatic Fever"),
        ("🧠 CNS / Neurology", "• Headache • Migraine • Seizure • Syncope"),
        ("🦴 Musculoskeletal", "• Back Pain • Spondylitis • Sprain • Gout"),
        ("🍄 Dermatology", "• Fungal • Scabies • Abscess • Urticaria"),
        ("👂 ENT", "• Otitis • Sinusitis • Tonsillitis"),
        ("🧒 Pediatrics", "• Fever • Diarrhea • Pneumonia • Bronchiolitis"),
        ("🤰 OBG", "• Hyperemesis • Pre-eclampsia • Dysmenorrhea"),
        ("🚨 Emergency", "• Anaphylaxis • Hypoglycemia • Acute Asthma"),
    ]
    col1_x, col2_x = card_m+20, W/2+10
    row_y = H-292
    for i, (sys_name, conditions) in enumerate(systems):
        col_x = col1_x if i % 2 == 0 else col2_x
        if i == 2: row_y = H-292  # reset for col2 start isn't needed but keep
        sy = row_y - (i//2)*38
        # badge
        draw_rounded_rect(c, col_x, sy-4, 180, 14, r=7,
                          fill=CLR["deep_blue"])
        c.saveState()
        c.setFont("Helvetica-Bold", 7.5)
        c.setFillColor(colors.white)
        c.drawString(col_x+6, sy, sys_name)
        c.restoreState()
        c.saveState()
        c.setFont("Helvetica", 6.5)
        c.setFillColor(CLR["grey"])
        c.drawString(col_x+6, sy-14, conditions)
        c.restoreState()

    # Statistics bar
    stats_y = 240
    draw_rounded_rect(c, card_m+10, stats_y-10, W-2*card_m-20, 45, r=8,
                      fill=CLR["deep_blue"])
    stats = [("35+", "Clinical Cases"), ("10", "Body Systems"),
             ("140+", "Medicines Listed"), ("100%", "Evidence-Based")]
    sw = (W-2*card_m-20) / 4
    for si, (val, lbl) in enumerate(stats):
        sx = card_m+10 + si*sw + sw/2
        c.saveState()
        c.setFont("Helvetica-Bold", 16)
        c.setFillColor(CLR["sky"])
        c.drawCentredString(sx, stats_y+15, val)
        c.setFont("Helvetica", 7)
        c.setFillColor(colors.white)
        c.drawCentredString(sx, stats_y+3, lbl)
        c.restoreState()

    # Bottom note
    c.saveState()
    c.setFont("Helvetica", 8)
    c.setFillColor(colors.white)
    c.drawCentredString(W/2, 180, "Each page: Hindi C/O  •  Rx with Dose/Frequency/Duration  •  Advice  •  Treatment Flow  •  Key Medicines")
    c.setFont("Helvetica", 7)
    c.setFillColor(colors.HexColor("#90CAF9"))
    c.drawCentredString(W/2, 165, "For educational & reference use only. Always verify with current clinical guidelines.")
    c.restoreState()

# ─────────────────────────────────────────────────────────────────────────────
# SECTION DIVIDER PAGES
# ─────────────────────────────────────────────────────────────────────────────

SECTION_INFO = {
    "RESPIRATORY":     ("#1A237E", "#E3F2FD", "🫁", "Covering: Cold • Pharyngitis • Bronchitis • Pneumonia • Asthma Attack"),
    "GASTROINTESTINAL":("#00695C", "#E0F2F1", "🏥", "Covering: Diarrhea • Gastritis • Acidity • Intestinal Worms"),
    "CARDIOVASCULAR":  ("#C62828", "#FFEBEE", "❤️", "Covering: Hypertension • Angina • Rheumatic Fever"),
    "CNS / NEUROLOGY": ("#6A1B9A", "#F3E5F5", "🧠", "Covering: Headache • Migraine • Seizure • Syncope"),
    "MUSCULOSKELETAL": ("#2E7D32", "#E8F5E9", "🦴", "Covering: Back Pain • Spondylitis • Sprain • Gout"),
    "DERMATOLOGY":     ("#FF6F00", "#FFF8E1", "🍄", "Covering: Fungal Infections • Scabies • Abscess • Urticaria"),
    "ENT":             ("#283593", "#E8EAF6", "👂", "Covering: Otitis Media • Sinusitis • Tonsillitis"),
    "PEDIATRICS":      ("#42A5F5", "#E3F2FD", "🧒", "Covering: Fever • Diarrhea • Pneumonia • Bronchiolitis"),
    "OBG (OBSTETRICS & GYNECOLOGY)": ("#6A1B9A", "#F3E5F5", "🤰", "Covering: Hyperemesis • Pre-eclampsia • Dysmenorrhea"),
    "EMERGENCY":       ("#C62828", "#FFEBEE", "🚨", "Covering: Anaphylaxis • Hypoglycemia • Acute Asthmatic Emergency"),
}

def draw_section_divider(c, system_name):
    if system_name not in SECTION_INFO:
        return
    bg_hex, lt_hex, emj, subtitle = SECTION_INFO[system_name]
    bg = colors.HexColor(bg_hex)
    lt = colors.HexColor(lt_hex)

    c.setFillColor(bg)
    c.rect(0, 0, W, H, stroke=0, fill=1)

    # decorative circles
    c.saveState()
    c.setFillColor(colors.HexColor(lt_hex))
    c.setFillAlpha(0.15)
    c.circle(W-80, H-80, 160, stroke=0, fill=1)
    c.circle(80, 80, 120, stroke=0, fill=1)
    c.restoreState()

    # white center panel
    draw_rounded_rect(c, 50, H/2-80, W-100, 180, r=16,
                      fill=colors.HexColor("#FAFAFA"))

    # emoji large
    c.saveState()
    c.setFont("Helvetica", 48)
    c.setFillColor(bg)
    c.drawCentredString(W/2, H/2+60, emj)
    c.restoreState()

    # system name
    c.saveState()
    c.setFont("Helvetica-Bold", 30)
    c.setFillColor(bg)
    c.drawCentredString(W/2, H/2+20, system_name)
    c.setFont("Helvetica", 12)
    c.setFillColor(CLR["grey"])
    c.drawCentredString(W/2, H/2-10, subtitle)

    # divider line
    c.setStrokeColor(bg)
    c.setLineWidth(2)
    c.line(100, H/2-30, W-100, H/2-30)

    c.setFont("Helvetica-Bold", 10)
    c.setFillColor(bg)
    c.drawCentredString(W/2, H/2-55, "Swipe to see case-by-case prescriptions →")
    c.restoreState()

    # left accent bar
    c.saveState()
    c.setFillColor(lt)
    c.rect(0, 0, 8, H, stroke=0, fill=1)
    c.restoreState()

# ─────────────────────────────────────────────────────────────────────────────
# MAIN
# ─────────────────────────────────────────────────────────────────────────────

OUTPUT = "/home/daytona/workspace/medical-pdf/Clinical_Prescription_Guide.pdf"

def main():
    c = canvas.Canvas(OUTPUT, pagesize=A4)
    c.setTitle("Clinical Quick-Reference Prescription Guide")
    c.setAuthor("Orris Medical Reference")
    c.setSubject("Hindi C/O + English Rx + Advice + Treatment Flow")

    total = len(CASES)

    # Cover
    draw_cover(c)
    c.showPage()

    # Section tracking
    seen_sections = set()
    page_num = 1

    for case in CASES:
        system = case[1]
        if system not in seen_sections:
            draw_section_divider(c, system)
            c.showPage()
            seen_sections.add(system)

        draw_page(c, case, page_num, total)
        c.showPage()
        page_num += 1

    c.save()
    print(f"PDF saved: {OUTPUT}")
    import os
    size_kb = os.path.getsize(OUTPUT) // 1024
    print(f"File size: {size_kb} KB")

main()