Update app.py

app.py

@@ -1,21 +1,1321 @@
-🐔 How Much Feed? - Results
+import os
+import math
+import re
+import sqlite3
+import json
+import urllib.parse
+from datetime import datetime
+from pathlib import Path
+
+import gradio as gr
+
+
+# ============================================================
+# APP CONFIG
+# ============================================================
+
+APP_NAME = "🐔 HowMuchFeed"
+DB_PATH = os.environ.get("DATABASE_PATH", "/data/howmuchfeed.db")
+
+# Admin password - set this in Hugging Face Secrets
+ADMIN_PASSWORD = os.environ.get("ADMIN_PASSWORD", "admin123")
+
+# Create directory if it doesn't exist
+db_dir = os.path.dirname(DB_PATH)
+if db_dir and not os.path.exists(db_dir):
+    os.makedirs(db_dir, exist_ok=True)
+
+STARTER_END_DAY = 21
+
+# ============================================================
+# GOOGLE SHEETS INTEGRATION
+# ============================================================
+
+def init_google_sheets():
+    """Initialize Google Sheets connection."""
+    try:
+        import gspread
+        from oauth2client.service_account import ServiceAccountCredentials
+        
+        creds_json = os.environ.get("GOOGLE_SHEETS_CREDENTIALS")
+        sheet_id = os.environ.get("GOOGLE_SHEETS_ID")
+        
+        if not creds_json or not sheet_id:
+            print("⚠️ Google Sheets not configured. Using local database only.")
+            return None, None
+        
+        creds_dict = json.loads(creds_json)
+        scope = [
+            "https://spreadsheets.google.com/feeds",
+            "https://www.googleapis.com/auth/drive"
+        ]
+        
+        creds = ServiceAccountCredentials.from_json_keyfile_dict(creds_dict, scope)
+        client = gspread.authorize(creds)
+        
+        try:
+            sheet = client.open_by_key(sheet_id)
+            print(f"✅ Google Sheets connected: {sheet.title}")
+        except:
+            sheet = client.create("How Much Feed Calculator Leads")
+            print(f"✅ New Google Sheet created")
+        
+        return client, sheet
+        
+    except Exception as e:
+        print(f"⚠️ Google Sheets error: {e}")
+        return None, None
+
+
+# Initialize Google Sheets
+gs_client, gs_sheet = init_google_sheets()
+
+
+def sync_to_google_sheets(email, country, currency, breed, action="lead"):
+    """Sync data to Google Sheets."""
+    if not gs_client or not gs_sheet:
+        return False
+    
+    try:
+        if action == "lead":
+            worksheet_name = "Leads"
+            headers = ["Email", "Country", "Currency", "Breed", "Created At"]
+            row_data = [email, country, currency, breed, datetime.now().isoformat()]
+        elif action == "question":
+            worksheet_name = "Questions"
+            headers = ["Email", "Question", "Breed", "Created At"]
+            row_data = [email, "Question", breed, datetime.now().isoformat()]
+        else:
+            return False
+        
+        try:
+            worksheet = gs_sheet.worksheet(worksheet_name)
+        except:
+            worksheet = gs_sheet.add_worksheet(title=worksheet_name, rows=1000, cols=20)
+            worksheet.append_row(headers)
+        
+        worksheet.append_row(row_data)
+        print(f"✅ Synced to Google Sheets: {email}")
+        return True
+        
+    except Exception as e:
+        print(f"⚠️ Google Sheets sync error: {e}")
+        return False
+
+
+# ============================================================
+# VERIFIED BREED DATA - From Official PDFs
+# ============================================================
+
+# Body Weight (kg) at key days - As-Hatched Performance
+BREED_WEIGHT_DATA = {
+    "Ross 308": {
+        0: 0.044, 7: 0.213, 14: 0.533, 21: 1.012,
+        28: 1.616, 35: 2.296, 42: 2.998, 49: 3.681, 56: 4.318,
+    },
+    "Cobb 500": {
+        0: 0.042, 7: 0.177, 14: 0.459, 21: 0.891,
+        28: 1.436, 35: 2.067, 42: 2.732, 49: 3.369, 56: 3.958,
+    },
+    "Arbor Acres": {
+        0: 0.044, 7: 0.209, 14: 0.527, 21: 1.006,
+        28: 1.611, 35: 2.287, 42: 2.964, 49: 3.662, 56: 4.318,
+    }
+}
+
+# Cumulative Feed (kg) at key days - As-Hatched Performance
+BREED_FEED_DATA = {
+    "Ross 308": {
+        0: 0.000, 7: 0.166, 14: 0.535, 21: 1.155,
+        28: 2.051, 35: 3.211, 42: 4.586, 49: 6.115, 56: 7.733,
+    },
+    "Cobb 500": {
+        0: 0.000, 7: 0.150, 14: 0.465, 21: 1.053,
+        28: 1.963, 35: 3.216, 42: 4.659, 49: 6.185, 56: 7.772,
+    },
+    "Arbor Acres": {
+        0: 0.000, 7: 0.207, 14: 0.638, 21: 1.163,
+        28: 2.069, 35: 3.237, 42: 4.625, 49: 6.111, 56: 7.647,
+    }
+}
+
+# Breed descriptions and availability
+BREED_INFO = {
+    "Ross 308": {
+        "description": "Big chest, thick legs, very fast growth. Excellent for meat production.",
+        "available_at": "Agrited, Sayed, Valentine",
+        "color": "#16a34a"
+    },
+    "Cobb 500": {
+        "description": "Good early growth, strong legs, solid feed conversion.",
+        "available_at": "Chikun, Zartech",
+        "color": "#2563eb"
+    },
+    "Arbor Acres": {
+        "description": "Balanced growth, hardy and adaptable. Great survival rate.",
+        "available_at": "Supreme, CHI, GS, Vertex, Fidan, Cascada, Orobor, Sunchi, Farm Support, Ajila",
+        "color": "#d97706"
+    }
+}
+
+
+def get_breed_weight_data(breed):
+    return BREED_WEIGHT_DATA.get(breed, BREED_WEIGHT_DATA["Ross 308"])
+
+
+def get_breed_feed_data(breed):
+    return BREED_FEED_DATA.get(breed, BREED_FEED_DATA["Ross 308"])
+
+
+def interpolate_weight(day, breed):
+    """Interpolate body weight between known checkpoints."""
+    weight_data = get_breed_weight_data(breed)
+
+    if day <= 0:
+        return weight_data[0]
+    if day >= 56:
+        return weight_data[56]
+
+    keys = sorted(weight_data.keys())
+    for i in range(len(keys) - 1):
+        if keys[i] <= day <= keys[i + 1]:
+            ratio = (day - keys[i]) / (keys[i + 1] - keys[i])
+            return weight_data[keys[i]] + (weight_data[keys[i + 1]] - weight_data[keys[i]]) * ratio
+
+    return weight_data[56]
+
+
+def interpolate_feed(day, breed):
+    """Interpolate cumulative feed between known checkpoints."""
+    feed_data = get_breed_feed_data(breed)
+
+    if day <= 0:
+        return 0.0
+    if day >= 56:
+        return feed_data[56]
+
+    keys = sorted(feed_data.keys())
+    for i in range(len(keys) - 1):
+        if keys[i] <= day <= keys[i + 1]:
+            ratio = (day - keys[i]) / (keys[i + 1] - keys[i])
+            return feed_data[keys[i]] + (feed_data[keys[i + 1]] - feed_data[keys[i]]) * ratio
+
+    return feed_data[56]
+
+
+# ============================================================
+# BENCHMARK TABLE GENERATOR
+# ============================================================
+
+def get_benchmark_table(breed):
+    """Generate benchmark table for the selected breed."""
+    weight_data = get_breed_weight_data(breed)
+    feed_data = get_breed_feed_data(breed)
+
+    days = [7, 14, 21, 28, 35, 42, 49, 56]
+
+    table_data = []
+    for day in days:
+        weight = weight_data.get(day, 0)
+        feed = feed_data.get(day, 0)
+        fcr = feed / weight if weight > 0 else 0
+        table_data.append([day, f"{weight:.3f}", f"{feed:.3f}", f"{fcr:.3f}"])
+
+    return table_data, days
+
+
+def get_breed_comparison_table():
+    """Generate comparison table for all three breeds."""
+    breeds = ["Ross 308", "Cobb 500", "Arbor Acres"]
+    days = [7, 14, 21, 28, 35, 42, 49, 56]
+
+    table_data = []
+    for day in days:
+        row = [day]
+        for breed in breeds:
+            weight_data = get_breed_weight_data(breed)
+            feed_data = get_breed_feed_data(breed)
+            weight = weight_data.get(day, 0)
+            feed = feed_data.get(day, 0)
+            fcr = feed / weight if weight > 0 else 0
+            row.append(f"{weight:.3f}")
+            row.append(f"{feed:.3f}")
+            row.append(f"{fcr:.3f}")
+        table_data.append(row)
+
+    return table_data, breeds, days
+
+
+# ============================================================
+# CURRENCY DATA
+# ============================================================
+
+CURRENCIES = {
+    "NG": ("Nigeria", "₦", "NGN"),
+    "GH": ("Ghana", "₵", "GHS"),
+    "KE": ("Kenya", "KSh", "KES"),
+    "UG": ("Uganda", "USh", "UGX"),
+    "TZ": ("Tanzania", "TSh", "TZS"),
+    "ZA": ("South Africa", "R", "ZAR"),
+    "ZM": ("Zambia", "ZK", "ZMW"),
+    "ZW": ("Zimbabwe", "ZiG", "ZWG"),
+    "CM": ("Cameroon", "FCFA", "XAF"),
+    "CI": ("Côte d'Ivoire", "CFA", "XOF"),
+    "SN": ("Senegal", "CFA", "XOF"),
+    "US": ("United States", "$", "USD"),
+    "GB": ("United Kingdom", "£", "GBP"),
+    "CA": ("Canada", "C$", "CAD"),
+    "AU": ("Australia", "A$", "AUD"),
+    "IN": ("India", "₹", "INR"),
+    "PK": ("Pakistan", "₨", "PKR"),
+    "BD": ("Bangladesh", "৳", "BDT"),
+    "BR": ("Brazil", "R$", "BRL"),
+}
+
+DEFAULT_PRICES = {
+    "NGN": 24000, "GHS": 300, "KES": 2200, "UGX": 100000,
+    "TZS": 30000, "ZAR": 300, "ZMW": 350, "USD": 25,
+    "GBP": 20, "EUR": 23, "INR": 2200, "PKR": 7000,
+    "BDT": 2500, "AUD": 35, "CAD": 35, "NZD": 40,
+    "BRL": 130, "XAF": 15000, "XOF": 15000, "ZWG": 350,
+}
+
+
+def detect_country_from_env():
+    """Best-effort country detection from environment variables."""
+    candidates = [
+        os.environ.get("COUNTRY_CODE"),
+        os.environ.get("CF-IPCOUNTRY"),
+        os.environ.get("GEOIP_COUNTRY"),
+        os.environ.get("HTTP_CF_IPCOUNTRY"),
+    ]
+
+    for value in candidates:
+        if value:
+            value = value.strip().upper()
+            if value in CURRENCIES:
+                return value
+
+    return None
+
+
+def get_country_info(country_code):
+    """Get currency info for a country code."""
+    if country_code in CURRENCIES:
+        name, symbol, code = CURRENCIES[country_code]
+        return country_code, symbol, code
+    return "NG", "₦", "NGN"
+
+
+def get_default_price(currency_code):
+    return DEFAULT_PRICES.get(currency_code, 24000)
+
+
+COUNTRY_LIST = sorted([(code, f"{name} ({symbol})") for code, (name, symbol, curr) in CURRENCIES.items()])
+
+
+# ============================================================
+# DATABASE
+# ============================================================
+
+def init_db():
+    conn = sqlite3.connect(DB_PATH)
+    cur = conn.cursor()
+
+    cur.execute("""
+        CREATE TABLE IF NOT EXISTS leads (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            email TEXT UNIQUE,
+            country TEXT,
+            currency TEXT,
+            breed TEXT,
+            created_at TEXT
+        )
+    """)
+
+    cur.execute("""
+        CREATE TABLE IF NOT EXISTS farmer_questions (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            email TEXT,
+            question TEXT,
+            breed TEXT,
+            created_at TEXT
+        )
+    """)
+
+    cur.execute("""
+        CREATE TABLE IF NOT EXISTS calculations (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            email TEXT,
+            country TEXT,
+            currency TEXT,
+            breed TEXT,
+            birds INTEGER,
+            weeks INTEGER,
+            days INTEGER,
+            total_days INTEGER,
+            bag_size REAL,
+            price_per_bag REAL,
+            total_feed_kg REAL,
+            starter_kg REAL,
+            finisher_kg REAL,
+            starter_bags REAL,
+            finisher_bags REAL,
+            total_bags REAL,
+            rounded_bags INTEGER,
+            total_cost REAL,
+            created_at TEXT
+        )
+    """)
+
+    cur.execute("""
+        CREATE TABLE IF NOT EXISTS analytics (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            visit_date TEXT,
+            ip TEXT,
+            country TEXT,
+            breed TEXT,
+            action TEXT,
+            created_at TEXT
+        )
+    """)
+
+    conn.commit()
+    conn.close()
+    print(f"✅ Database initialized at: {DB_PATH}")
+
+
+init_db()
+
+
+# ============================================================
+# DATABASE HELPERS
+# ============================================================
+
+def valid_email(email):
+    if not email:
+        return False
+    email = email.strip()
+    pattern = r"^[^@\s]+@[^@\s]+\.[^@\s]+$"
+    return bool(re.match(pattern, email))
+
+
+def save_lead(email, country, currency, breed):
+    if not valid_email(email):
+        return
+
+    # Save to SQLite
+    conn = sqlite3.connect(DB_PATH)
+    cur = conn.cursor()
+    cur.execute("""
+        INSERT OR IGNORE INTO leads (email, country, currency, breed, created_at)
+        VALUES (?, ?, ?, ?, ?)
+    """, (email.strip().lower(), country, currency, breed, datetime.utcnow().isoformat()))
+    conn.commit()
+    conn.close()
+
+    # Sync to Google Sheets
+    try:
+        sync_to_google_sheets(email, country, currency, breed, "lead")
+    except Exception as e:
+        print(f"Google Sheets sync error: {e}")
+
+
+def save_question(email, question, breed):
+    if not question or not question.strip():
+        return
+
+    # Save to SQLite
+    conn = sqlite3.connect(DB_PATH)
+    cur = conn.cursor()
+    cur.execute("""
+        INSERT INTO farmer_questions (email, question, breed, created_at)
+        VALUES (?, ?, ?, ?)
+    """, (email.strip().lower() if email else "", question.strip(), breed, datetime.utcnow().isoformat()))
+    conn.commit()
+    conn.close()
+
+    # Sync to Google Sheets
+    try:
+        sync_to_google_sheets(email, question, breed, "question")
+    except Exception as e:
+        print(f"Google Sheets sync error: {e}")
+
+
+def save_calculation(email, country, currency, breed, birds, weeks, days, total_days,
+                     bag_size, price_per_bag, total_feed_kg, starter_kg, finisher_kg,
+                     starter_bags, finisher_bags, total_bags, rounded_bags, total_cost):
+    conn = sqlite3.connect(DB_PATH)
+    cur = conn.cursor()
+
+    cur.execute("""
+        INSERT INTO calculations (
+            email, country, currency, breed, birds, weeks, days, total_days,
+            bag_size, price_per_bag, total_feed_kg, starter_kg, finisher_kg,
+            starter_bags, finisher_bags, total_bags, rounded_bags, total_cost, created_at
+        )
+        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+    """, (email.strip().lower() if email else "", country, currency, breed, birds, weeks, days, total_days,
+          bag_size, price_per_bag, total_feed_kg, starter_kg, finisher_kg,
+          starter_bags, finisher_bags, total_bags, rounded_bags, total_cost,
+          datetime.utcnow().isoformat()))
+
+    conn.commit()
+    conn.close()
+
+
+def track_visit(request: gr.Request):
+    """Track page visit."""
+    try:
+        client_ip = request.client.host if request and hasattr(request, 'client') else "unknown"
+        
+        conn = sqlite3.connect(DB_PATH)
+        cur = conn.cursor()
+        
+        cur.execute("""
+            INSERT INTO analytics (visit_date, ip, country, action, created_at)
+            VALUES (?, ?, ?, ?, ?)
+        """, (
+            datetime.now().strftime("%Y-%m-%d"),
+            client_ip,
+            detect_country_from_env() or "NG",
+            "page_visit",
+            datetime.now().isoformat()
+        ))
+        
+        conn.commit()
+        conn.close()
+        return True
+    except Exception as e:
+        print(f"Analytics error: {e}")
+        return False
+
+
+def track_calculation(breed, birds, days):
+    """Track when a calculation is performed."""
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        cur = conn.cursor()
+        
+        cur.execute("""
+            INSERT INTO analytics (visit_date, country, breed, action, created_at)
+            VALUES (?, ?, ?, ?, ?)
+        """, (
+            datetime.now().strftime("%Y-%m-%d"),
+            detect_country_from_env() or "NG",
+            breed,
+            f"calculation_{birds}_{days}",
+            datetime.now().isoformat()
+        ))
+        
+        conn.commit()
+        conn.close()
+        return True
+    except:
+        return False
+
+
+def get_analytics_summary():
+    """Get analytics summary."""
+    conn = sqlite3.connect(DB_PATH)
+    cur = conn.cursor()
+    
+    cur.execute("SELECT COUNT(*) FROM analytics WHERE action = 'page_visit'")
+    total_visits = cur.fetchone()[0] or 0
+    
+    cur.execute("SELECT COUNT(*) FROM analytics WHERE action = 'page_visit' AND visit_date = ?", 
+                (datetime.now().strftime("%Y-%m-%d"),))
+    today_visits = cur.fetchone()[0] or 0
+    
+    cur.execute("SELECT COUNT(*) FROM analytics WHERE action LIKE 'calculation_%'")
+    total_calculations = cur.fetchone()[0] or 0
+    
+    cur.execute("SELECT COUNT(DISTINCT ip) FROM analytics WHERE action = 'page_visit' AND ip != 'unknown'")
+    unique_visitors = cur.fetchone()[0] or 0
+    
+    cur.execute("SELECT breed, COUNT(*) FROM analytics WHERE action LIKE 'calculation_%' GROUP BY breed")
+    breed_stats = cur.fetchall()
+    
+    # Total leads
+    cur.execute("SELECT COUNT(*) FROM leads")
+    total_leads = cur.fetchone()[0] or 0
+    
+    conn.close()
+    
+    return {
+        "total_visits": total_visits,
+        "today_visits": today_visits,
+        "unique_visitors": unique_visitors,
+        "total_calculations": total_calculations,
+        "total_leads": total_leads,
+        "breed_stats": breed_stats
+    }
+
+
+# ============================================================
+# WHATSAPP SHARE LINK GENERATOR
+# ============================================================
+
+def get_whatsapp_link(birds, breed, weeks, days, total_days, bag_size, rounded_bags,
+                      starter_bags, finisher_bags, total_cost, price_per_bag,
+                      currency_symbol, expected_weight, flock_weight, app_url="https://howmuchfeed.com"):
+    """Generate WhatsApp share link with calculation results."""
+    
+    # Format the message
+    message = f"""🐔 How Much Feed? - Results
 
 🎯 Quick Answer:
-⭐ 16 bags of 25 kg feed is needed
-To raise 100 Ross 308 broilers to 8 weeks (56 days)
+⭐ {rounded_bags} bags of {bag_size} kg feed is needed
+To raise {birds:,} {breed} broilers to {weeks} weeks{f" + {days} days" if days > 0 else ""} ({total_days} days)
 
 🌾 Feed Breakdown:
-• Starter: 4 bags
-• Finisher: 12 bags
-• TOTAL: 16 bags
+• Starter: {starter_bags:.0f} bags
+• Finisher: {finisher_bags:.0f} bags
+• TOTAL: {rounded_bags} bags
 
 💰 Feed Cost:
-₦384,000
-(16 bags × ₦24,000 per bag)
+{currency_symbol}{total_cost:,.0f}
+({rounded_bags} bags × {currency_symbol}{price_per_bag:,.0f} per bag)
 
 📊 Expected Performance:
-• Body weight / bird: 4.318 kg
-• Flock live weight: 431.8 kg
+• Body weight / bird: {expected_weight:.3f} kg
+• Flock live weight: {flock_weight:,.1f} kg
 
 🔗 Calculate your feed needs:
-https://howmuchfeed.com
+{app_url}"""
+    
+    # URL encode
+    encoded = urllib.parse.quote(message)
+    
+    # WhatsApp link
+    return f"https://wa.me/?text={encoded}"
+
+
+# ============================================================
+# FEED CALCULATION
+# ============================================================
+
+def calculate_feed(birds, weeks, days, bag_size, price_per_bag, email, country_code, breed, request: gr.Request):
+    # Validation
+    try:
+        birds = int(birds)
+        weeks = int(weeks)
+        days = int(days)
+        bag_size = float(bag_size)
+        price_per_bag = float(price_per_bag)
+    except Exception:
+        return "⚠️ Please enter valid numbers.", ""
+
+    if birds <= 0:
+        return "⚠️ Number of birds must be greater than zero.", ""
+    if weeks < 0:
+        return "⚠️ Weeks cannot be negative.", ""
+    if days < 0 or days > 6:
+        return "⚠️ Days must be between 0 and 6.", ""
+    if bag_size <= 0:
+        return "⚠️ Feed bag size must be greater than zero.", ""
+    if price_per_bag < 0:
+        return "⚠️ Price per bag cannot be negative.", ""
+
+    if not valid_email(email):
+        return "📧 **Email required**\n\nPlease enter your email address before calculating.", ""
+
+    # Country / Currency
+    country_name, symbol, currency_code = get_country_info(country_code)
+    currency_symbol = symbol
+
+    # Save lead with breed
+    save_lead(email, country_code, currency_code, breed)
+
+    # Track calculation
+    track_calculation(breed, birds, (weeks * 7 + days))
+
+    # Total days
+    total_days = (weeks * 7) + days
+
+    # Total feed
+    total_feed_per_bird = interpolate_feed(total_days, breed)
+    total_feed_kg = birds * total_feed_per_bird
+
+    # Starter / Finisher
+    starter_days = min(total_days, STARTER_END_DAY)
+    starter_per_bird = interpolate_feed(starter_days, breed)
+    starter_kg = birds * starter_per_bird
+    finisher_kg = max(total_feed_kg - starter_kg, 0)
+
+    # Bags
+    starter_bags = starter_kg / bag_size
+    finisher_bags = finisher_kg / bag_size
+    total_bags = total_feed_kg / bag_size
+    rounded_bags = math.ceil(total_bags)
+    total_cost = rounded_bags * price_per_bag
+
+    # Expected performance
+    expected_weight = interpolate_weight(total_days, breed)
+    flock_weight = expected_weight * birds
+
+    # Save calculation
+    save_calculation(email, country_code, currency_code, breed, birds, weeks, days, total_days,
+                     bag_size, price_per_bag, total_feed_kg, starter_kg, finisher_kg,
+                     starter_bags, finisher_bags, total_bags, rounded_bags, total_cost)
+
+    # Breed info
+    breed_info = BREED_INFO.get(breed, BREED_INFO["Ross 308"])
+    breed_color = breed_info["color"]
+
+    # Generate WhatsApp link
+    whatsapp_link = get_whatsapp_link(
+        birds, breed, weeks, days, total_days, bag_size, rounded_bags,
+        starter_bags, finisher_bags, total_cost, price_per_bag,
+        currency_symbol, expected_weight, flock_weight
+    )
+
+    # Output HTML
+    starter_bags_display = f"{starter_bags:.1f}"
+    finisher_bags_display = f"{finisher_bags:.1f}"
+
+    age_text = f"{weeks} week{'s' if weeks != 1 else ''}"
+    if days:
+        age_text += f" + {days} day{'s' if days != 1 else ''}"
+
+    html = f"""
+    <div style="font-size: 17px; line-height: 1.6;">
+
+    <div style="background: #f0fdf4; padding: 18px 22px; border-radius: 14px; border-left: 6px solid #22c55e; margin-bottom: 20px;">
+        <div style="font-size: 13px; color: #16a34a; font-weight: 700; text-transform: uppercase; letter-spacing: 0.8px;">🎯 Quick Answer</div>
+        <div style="font-size: 28px; font-weight: 800; color: #166534; margin: 6px 0 4px 0;">
+            ⭐ {rounded_bags} bags of {bag_size:g} kg feed is needed
+        </div>
+        <div style="color: #374151; font-size: 16px;">
+            To raise <strong>{birds:,}</strong> {breed} broilers to <strong>{age_text} ({total_days} days)</strong>
+        </div>
+        <div style="margin-top: 8px; font-size: 13px;">
+            <span style="background: {breed_color}; color: white; padding: 3px 12px; border-radius: 14px; font-weight: 600;">{breed}</span>
+            <span style="background: #6b7280; color: white; padding: 3px 12px; border-radius: 14px; font-weight: 600; margin-left: 8px;">{country_name}</span>
+        </div>
+    </div>
+
+    <div style="margin-bottom: 16px;">
+        <div style="font-size: 13px; color: #6b7280; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px;">🌾 Feed Breakdown</div>
+        <table style="width: 100%; border-collapse: collapse; margin-top: 6px; font-size: 15px;">
+            <tr style="border-bottom: 1px solid #e5e7eb;">
+                <td style="padding: 8px 4px;"><strong>🌱 Starter</strong></td>
+                <td style="padding: 8px 4px; text-align: right;">{starter_kg:,.1f} kg</td>
+                <td style="padding: 8px 4px; text-align: right; font-weight: 600;">{starter_bags_display} bags</td>
+            </tr>
+            <tr style="border-bottom: 1px solid #e5e7eb;">
+                <td style="padding: 8px 4px;"><strong>🌽 Finisher</strong></td>
+                <td style="padding: 8px 4px; text-align: right;">{finisher_kg:,.1f} kg</td>
+                <td style="padding: 8px 4px; text-align: right; font-weight: 600;">{finisher_bags_display} bags</td>
+            </tr>
+            <tr>
+                <td style="padding: 8px 4px; font-weight: 700;">TOTAL</td>
+                <td style="padding: 8px 4px; text-align: right; font-weight: 700;">{total_feed_kg:,.1f} kg</td>
+                <td style="padding: 8px 4px; text-align: right; font-weight: 700;">{total_bags:.1f}</td>
+            </tr>
+        </table>
+    </div>
+
+    <div style="margin-bottom: 16px; background: #eff6ff; padding: 14px 18px; border-radius: 10px; border-left: 4px solid #3b82f6;">
+        <div style="font-size: 13px; color: #6b7280; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px;">💰 Feed Cost</div>
+        <div style="font-size: 30px; font-weight: 800; color: #1e40af;">
+            {currency_symbol}{total_cost:,.0f}
+        </div>
+        <div style="color: #6b7280; font-size: 14px;">
+            {rounded_bags} bags × {currency_symbol}{price_per_bag:,.0f} per bag
+        </div>
+    </div>
+
+    <div style="border-top: 1px solid #e5e7eb; padding-top: 14px;">
+        <div style="font-size: 13px; color: #6b7280; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px;">📊 Expected Performance</div>
+        <table style="width: 100%; border-collapse: collapse; margin-top: 6px; font-size: 15px;">
+            <tr style="border-bottom: 1px solid #e5e7eb;">
+                <td style="padding: 6px 4px;">Body weight / bird</td>
+                <td style="padding: 6px 4px; text-align: right; font-weight: 600;">{expected_weight:.3f} kg</td>
+            </tr>
+            <tr>
+                <td style="padding: 6px 4px;">Flock live weight</td>
+                <td style="padding: 6px 4px; text-align: right; font-weight: 600;">{flock_weight:,.1f} kg</td>
+            </tr>
+        </table>
+    </div>
+
+    <div style="margin-top: 16px; border-top: 1px solid #e5e7eb; padding-top: 14px;">
+        <div style="display: flex; gap: 10px; flex-wrap: wrap;">
+            <a href="{whatsapp_link}" target="_blank" style="text-decoration: none;">
+                <button style="background: #25D366; color: white; padding: 10px 18px; border: none; border-radius: 8px; cursor: pointer; font-size: 15px; font-weight: 600; display: flex; align-items: center; gap: 8px;">
+                    <svg width="20" height="20" viewBox="0 0 24 24" fill="white">
+                        <path d="M17.472 14.382c-.297-.149-1.758-.867-2.03-.967-.273-.099-.471-.148-.67.15-.197.297-.767.966-.94 1.164-.173.199-.347.223-.644.075-.297-.15-1.255-.463-2.39-1.475-.883-.788-1.48-1.761-1.653-2.059-.173-.297-.018-.458.13-.606.134-.133.298-.347.446-.52.149-.174.198-.298.298-.497.099-.198.05-.371-.025-.52-.075-.149-.669-1.612-.916-2.207-.242-.579-.487-.5-.669-.51-.173-.008-.371-.01-.57-.01-.198 0-.52.074-.792.372-.272.297-1.04 1.016-1.04 2.479 0 1.462 1.065 2.875 1.213 3.074.149.198 2.096 3.2 5.077 4.487.709.306 1.262.489 1.694.625.712.227 1.36.195 1.871.118.571-.085 1.758-.719 2.006-1.413.248-.694.248-1.289.173-1.413-.074-.124-.272-.198-.57-.347m-5.421 7.403h-.004a9.87 9.87 0 01-5.031-1.378l-.361-.214-3.741.982.998-3.648-.235-.374a9.86 9.86 0 01-1.51-5.26c.001-5.45 4.436-9.884 9.888-9.884 2.64 0 5.122 1.03 6.988 2.898a9.825 9.825 0 012.893 6.994c-.003 5.45-4.437 9.884-9.885 9.884m8.413-18.297A11.815 11.815 0 0012.05 0C5.495 0 .16 5.335.157 11.892c0 2.096.547 4.142 1.588 5.945L.057 24l6.305-1.654a11.882 11.882 0 005.683 1.448h.005c6.554 0 11.89-5.335 11.893-11.893a11.821 11.821 0 00-3.48-8.413z"/>
+                    </svg>
+                    Share on WhatsApp
+                </button>
+            </a>
+            <button onclick="window.print()" style="background: #6b7280; color: white; padding: 10px 18px; border: none; border-radius: 8px; cursor: pointer; font-size: 15px; font-weight: 600; display: flex; align-items: center; gap: 8px;">
+                🖨️ Print Results
+            </button>
+        </div>
+    </div>
+
+    <div style="margin-top: 14px; font-size: 12px; color: #9ca3af; border-top: 1px solid #f3f4f6; padding-top: 10px;">
+        ⚠️ Estimate based on {breed} benchmark. Actual results may vary.
+    </div>
+    </div>
+    """
+
+    return html, f"✅ Calculation saved for {email.strip().lower()}."
+
+
+# ============================================================
+# QUESTION / ANSWER
+# ============================================================
+
+def answer_farmer_question(question, email, breed):
+    if not question or not question.strip():
+        return "Please type or speak your question first."
+
+    save_question(email or "", question, breed)
+
+    q = question.lower().strip()
+
+    if "bag" in q and ("feed" in q or "birds" in q):
+        answer = """
+### 🐔 Feed-bag questions
+
+For an exact feed estimate, use the calculator above.
+
+Enter:
+1. Number of birds
+2. Age in weeks + days
+3. Feed bag size
+4. Price per bag
+5. Your email
+6. Breed
+
+The calculator will give you the estimated total bags, starter/finisher breakdown and feed cost.
+"""
+    elif "breed" in q or "ross" in q or "cobb" in q or "arbor" in q:
+        answer = """
+### 🐔 Common Broiler Breeds in Nigeria
+
+| Breed | Characteristics | Available At |
+|-------|-----------------|--------------|
+| **Ross 308** | Big chest, thick legs, very fast growth | Agrited, Sayed, Valentine |
+| **Cobb 500** | Good early growth, strong legs | Chikun, Zartech |
+| **Arbor Acres** | Balanced growth, hardy, adaptable | Supreme, CHI, GS, Vertex, Fidan, Cascada, Orobor, Sunchi, Farm Support, Ajila |
+
+💡 **Tip:** Before buying chicks, ask about the breed and hatchery. Not all broilers are the same!
+"""
+    elif "starter" in q:
+        answer = f"""
+### 🌾 Starter feed
+
+Starter feed is used during the early growth period (Day 0–{STARTER_END_DAY}).
+
+The calculator separates the estimated feed requirement into **Starter** and **Finisher** based on the selected age.
+"""
+    elif "finisher" in q:
+        answer = f"""
+### 🌾 Finisher feed
+
+Finisher feed is used after day {STARTER_END_DAY}.
+
+Your calculator automatically estimates the finisher requirement from the selected number of birds and total age.
+"""
+    elif "cost" in q or "price" in q:
+        answer = """
+### 💰 Feed cost
+
+Enter the current price of one feed bag in the calculator.
+
+The app calculates: **Number of bags × price per bag = estimated feed cost**
+
+The result is for **feed alone**.
+"""
+    else:
+        answer = f"""
+### 💡 Question received
+
+**“{question.strip()}”**
+
+Your question has been saved.
+
+We can use the questions farmers submit to decide which answers, calculators and features should be added to the app next.
+"""
+
+    return answer
+
+
+# ============================================================
+# UPDATE FUNCTIONS
+# ============================================================
+
+def update_benchmark(breed):
+    """Update the benchmark table when breed changes."""
+    table_data, days = get_benchmark_table(breed)
+    return table_data
+
+
+def on_country_change_handler(country_selection):
+    """Update price and currency when country changes."""
+    if country_selection == "Auto-Detect":
+        country_code = detect_country_from_env() or "NG"
+    else:
+        country_code = country_selection
+
+    _, symbol, currency_code = get_country_info(country_code)
+    default_price = get_default_price(currency_code)
+    return country_code, default_price, symbol
+
+
+# ============================================================
+# ADMIN FUNCTIONS
+# ============================================================
+
+def show_analytics(password):
+    """Display analytics summary - only with correct password."""
+    if password != ADMIN_PASSWORD:
+        return """
+        ### 🔒 Admin Access Required
+        
+        Please enter the correct admin password to view analytics.
+        """
+    
+    stats = get_analytics_summary()
+    
+    breed_stats_html = ""
+    for breed, count in stats["breed_stats"]:
+        breed_stats_html += f"<li><strong>{breed}</strong>: {count} calculations</li>"
+    
+    if not breed_stats_html:
+        breed_stats_html = "<li>No calculations yet</li>"
+    
+    return f"""
+    ### 📊 How Much Feed? - Analytics
+    
+    | Metric | Value |
+    |--------|-------|
+    | **Total Visits** | **{stats['total_visits']:,}** |
+    | **Today's Visits** | **{stats['today_visits']}** |
+    | **Unique Visitors** | **{stats['unique_visitors']:,}** |
+    | **Total Calculations** | **{stats['total_calculations']:,}** |
+    | **Total Leads (Emails)** | **{stats['total_leads']:,}** |
+    
+    ### 🐔 Most Popular Breeds
+    
+    <ul>{breed_stats_html}</ul>
+    
+    ---
+    *Last updated: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}*
+    """
+
+
+def admin_login(password):
+    """Check admin password."""
+    if password == ADMIN_PASSWORD:
+        return show_analytics(password), gr.update(visible=True), gr.update(visible=False)
+    else:
+        return "❌ Incorrect password. Please try again.", gr.update(visible=False), gr.update(visible=True)
+
+
+def logout_admin():
+    """Logout and hide analytics."""
+    return "🔒 Enter password to view analytics.", gr.update(visible=True), gr.update(visible=False)
+
+
+def export_leads_to_csv():
+    """Export all leads to CSV format."""
+    conn = sqlite3.connect(DB_PATH)
+    cur = conn.cursor()
+    cur.execute("SELECT email, country, currency, breed, created_at FROM leads ORDER BY created_at DESC")
+    rows = cur.fetchall()
+    conn.close()
+
+    import csv
+    from io import StringIO
+    
+    output = StringIO()
+    writer = csv.writer(output)
+    writer.writerow(["Email", "Country", "Currency", "Breed", "Created At"])
+    writer.writerows(rows)
+    
+    return output.getvalue()
+
+
+def export_leads_wrapper():
+    """Export leads to CSV file for download."""
+    import tempfile
+    csv_data = export_leads_to_csv()
+    temp = tempfile.NamedTemporaryFile(mode='w', suffix='.csv', delete=False, encoding='utf-8')
+    temp.write(csv_data)
+    temp.close()
+    return temp.name
+
+
+def export_calculations_wrapper():
+    """Export calculations to CSV file for download."""
+    conn = sqlite3.connect(DB_PATH)
+    cur = conn.cursor()
+    cur.execute("""
+        SELECT email, breed, birds, total_days, rounded_bags, bag_size, total_cost, created_at 
+        FROM calculations 
+        ORDER BY created_at DESC
+    """)
+    rows = cur.fetchall()
+    conn.close()
+    
+    import csv
+    import tempfile
+    
+    temp = tempfile.NamedTemporaryFile(mode='w', suffix='.csv', delete=False, encoding='utf-8')
+    writer = csv.writer(temp)
+    writer.writerow(["Email", "Breed", "Birds", "Total Days", "Bags", "Bag Size (kg)", "Total Cost", "Created At"])
+    writer.writerows(rows)
+    temp.close()
+    
+    return temp.name
+
+
+# ============================================================
+# CSS
+# ============================================================
+
+CSS = """
+body { background: #f6f8f4; }
+.gradio-container { max-width: 1200px !important; margin: auto !important; }
+.main-title { text-align: center; padding: 15px 10px 5px 10px; }
+.main-title h1 { font-size: 34px; margin-bottom: 4px; }
+.main-title p { font-size: 17px; color: #555; }
+.answer-box { background: white; border-radius: 16px; padding: 16px 20px; border: 1px solid #e5e7eb; box-shadow: 0 1px 3px rgba(0,0,0,0.05); min-height: 400px; }
+.email-box { border: 2px solid #d9e7d2; border-radius: 12px; padding: 10px; background: #fbfdf9; }
+button { min-height: 48px !important; }
+.admin-login { border: 2px solid #d97706; border-radius: 12px; padding: 15px; background: #fffbeb; }
+.whatsapp-btn { background: #25D366; color: white; padding: 10px 18px; border: none; border-radius: 8px; cursor: pointer; font-size: 15px; font-weight: 600; }
+.print-btn { background: #6b7280; color: white; padding: 10px 18px; border: none; border-radius: 8px; cursor: pointer; font-size: 15px; font-weight: 600; }
+"""
+
+
+# ============================================================
+# UI
+# ============================================================
+
+with gr.Blocks(title=APP_NAME) as demo:
+
+    gr.HTML("""
+    <div class="main-title">
+        <h1>🐔 How Much Feed?</h1>
+        <p>How many bags of feed for broilers for 5, 6, 7, or 8 weeks? Get accurate feed needed and estimated cost for your birds.</p>
+    </div>
+    """)
+
+    with gr.Row(equal_height=True):
+
+        # LEFT COLUMN: INPUTS
+        with gr.Column(scale=1, min_width=350):
+
+            with gr.Group():
+                gr.Markdown("## 🐔 Breed & Birds")
+
+                breed = gr.Dropdown(
+                    choices=["Ross 308", "Cobb 500", "Arbor Acres"],
+                    value="Ross 308",
+                    label="Breed",
+                    info="Select your broiler breed for accurate estimates",
+                )
+
+                birds = gr.Dropdown(
+                    choices=[25, 50, 75, 100, 150, 200, 500, 1000],
+                    value=50,
+                    label="Number of birds",
+                    allow_custom_value=True,
+                )
+
+                gr.Markdown("## 📅 Expected Age of Birds")
+
+                with gr.Row():
+                    weeks = gr.Dropdown(
+                        choices=list(range(0, 21)),
+                        value=8,
+                        label="Weeks",
+                    )
+                    days = gr.Dropdown(
+                        choices=list(range(0, 7)),
+                        value=0,
+                        label="+ Days",
+                    )
+
+                gr.Markdown("## 🌾 Feed")
+
+                with gr.Row():
+                    bag_size = gr.Dropdown(
+                        choices=[10, 20, 25, 50, 100],
+                        value=25,
+                        label="Bag size (kg)",
+                    )
+                    price = gr.Number(
+                        value=24000,
+                        label=f"Price per bag ",
+                        minimum=0,
+                    )
+
+                gr.Markdown("## 🌍 Country & Currency")
+
+                detected_country = detect_country_from_env() or "NG"
+                country_choices = ["Auto-Detect"] + [code for code, _ in COUNTRY_LIST]
+
+                country_dropdown = gr.Dropdown(
+                    choices=country_choices,
+                    value="Auto-Detect",
+                    label="Select your country (Auto-Detect uses your IP)",
+                )
+
+                country_code_state = gr.State(detected_country)
+
+            gr.Markdown("## 📧 Your email")
+
+            email = gr.Textbox(
+                label="",
+                placeholder="farmer@example.com",
+                type="email",
+                elem_classes=["email-box"],
+                info="Required — we'll send you future updates",
+            )
+
+            calculate_btn = gr.Button(
+                "🐔 Calculate Feed Requirement",
+                variant="primary",
+                size="lg",
+            )
+
+            save_status = gr.Markdown("")
+
+        # RIGHT COLUMN: RESULTS
+        with gr.Column(scale=1, min_width=350):
+
+            gr.Markdown("## 🎯 Quick Answer")
+
+            result = gr.HTML(
+                value="""
+                <div style="font-size: 16px; color: #9ca3af; text-align: center; padding: 40px 20px;">
+                    <div style="font-size: 48px; margin-bottom: 12px;">🐔</div>
+                    <div>Select your breed, enter details and click <strong>Calculate</strong></div>
+                    <div style="font-size: 14px; margin-top: 8px;">Your feed estimate will appear here</div>
+                </div>
+                """,
+                elem_classes=["answer-box"],
+            )
+
+    # ============================================================
+    # BENCHMARK SECTION
+    # ============================================================
+
+    gr.Markdown("---")
+
+    with gr.Tabs():
+        with gr.TabItem("📊 Selected Breed Benchmark"):
+            gr.Markdown("### 📊 Weekly Benchmark for Selected Breed")
+            initial_table, _ = get_benchmark_table("Ross 308")
+
+            benchmark_table = gr.Dataframe(
+                value=initial_table,
+                headers=["Days", "Body Weight (kg)", "Cumulative Feed (kg)", "FCR"],
+                interactive=False,
+                wrap=True,
+            )
+
+        with gr.TabItem("📈 Breed Comparison"):
+            gr.Markdown("### 📊 Breed Comparison (As-Hatched Performance)")
+            comp_data, breeds_list, days_list = get_breed_comparison_table()
+
+            headers = ["Days"]
+            for b in breeds_list:
+                headers.append(f"{b} Weight (kg)")
+                headers.append(f"{b} Feed (kg)")
+                headers.append(f"{b} FCR")
+
+            comparison_table = gr.Dataframe(
+                value=comp_data,
+                headers=headers,
+                interactive=False,
+                wrap=True,
+            )
+
+        # ============================================================
+        # ADMIN-ONLY ANALYTICS TAB
+        # ============================================================
+        
+        with gr.TabItem("🔒 Admin"):
+            gr.Markdown("### 🔒 Admin Dashboard")
+            
+            with gr.Group(elem_classes="admin-login"):
+                gr.Markdown("Enter admin password to view analytics and download data.")
+                
+                with gr.Row():
+                    admin_password_input = gr.Textbox(
+                        label="Admin Password",
+                        placeholder="Enter password...",
+                        type="password",
+                        scale=2,
+                    )
+                    login_btn = gr.Button("Login", variant="primary", scale=1)
+                    logout_btn = gr.Button("Logout", variant="secondary", scale=1)
+            
+            # Analytics output
+            admin_output = gr.Markdown("🔒 Enter password to view analytics.")
+            
+            # Export buttons
+            with gr.Row():
+                export_leads_btn = gr.Button("📥 Export Leads (CSV)", variant="secondary")
+                export_leads_output = gr.File(label="Download Leads CSV")
+            
+            with gr.Row():
+                export_calc_btn = gr.Button("📥 Export Calculations (CSV)", variant="secondary")
+                export_calc_output = gr.File(label="Download Calculations CSV")
+            
+            # Login/Logout events
+            login_btn.click(
+                fn=admin_login,
+                inputs=[admin_password_input],
+                outputs=[admin_output, admin_password_input, logout_btn],
+            )
+            
+            logout_btn.click(
+                fn=logout_admin,
+                inputs=[],
+                outputs=[admin_output, admin_password_input, logout_btn],
+            )
+            
+            # Export events
+            export_leads_btn.click(
+                fn=export_leads_wrapper,
+                inputs=[],
+                outputs=[export_leads_output],
+            )
+            
+            export_calc_btn.click(
+                fn=export_calculations_wrapper,
+                inputs=[],
+                outputs=[export_calc_output],
+            )
+
+    # ============================================================
+    # BREED REFERENCE
+    # ============================================================
+
+    gr.Markdown("---")
+
+    gr.Markdown("""
+    ### 🐔 Common Broiler Breeds in Nigeria
+
+    | Breed | Characteristics | Available At |
+    |-------|-----------------|--------------|
+    | **Ross 308** | Big chest, thick legs, very fast growth | Agrited, Sayed, Valentine |
+    | **Cobb 500** | Good early growth, strong legs | Chikun, Zartech |
+    | **Arbor Acres** | Balanced growth, hardy, adaptable | Supreme, CHI, GS, Vertex, Fidan, Cascada, Orobor, Sunchi, Farm Support, Ajila |
+
+    💡 **Tip:** Before buying chicks, ask about the breed and hatchery. Not all broilers are the same!
+    """)
+
+    # ============================================================
+    # HOW IT WORKS
+    # ============================================================
+
+    gr.Markdown("---")
+
+    with gr.Row():
+        with gr.Column(scale=1):
+            gr.Markdown("""
+            ### 📌 How it works
+
+            - **Weeks + Days** → total days
+            - **Starter** → Day 0–21
+            - **Finisher** → Day 22+
+            - **Bags** → rounded up to next whole bag
+            - **Breed-specific benchmarks** used for estimates
+
+            ⚠️ Actual results may vary with management, feed quality, and other conditions.
+            """)
+
+        with gr.Column(scale=1):
+            gr.Markdown("""
+            ### 📊 Data Sources
+
+            - **Ross 308** — Aviagen (2022)
+            - **Cobb 500** — Cobb-Vantress
+            - **Arbor Acres** — Aviagen (2022)
+
+            *All data from official breed performance objectives.*
+            """)
+
+    # ============================================================
+    # QUESTION SECTION
+    # ============================================================
+
+    gr.Markdown("---")
+
+    with gr.Row():
+        with gr.Column(scale=2):
+            gr.Markdown("""
+            # ❓ Ask a question
+            ### What would you like to know about raising your birds?
+            """)
+
+            question = gr.Textbox(
+                label="",
+                placeholder="e.g. How many bags of feed for 100 broilers for 6 weeks?",
+                lines=3,
+            )
+
+            ask_btn = gr.Button("💬 Get Answer", variant="secondary", size="lg")
+            question_answer = gr.Markdown("")
+
+    # ============================================================
+    # EVENTS
+    # ============================================================
+
+    # Update benchmark table when breed changes
+    breed.change(
+        fn=update_benchmark,
+        inputs=[breed],
+        outputs=[benchmark_table],
+    )
+
+    # Update price and currency when country changes
+    country_dropdown.change(
+        fn=on_country_change_handler,
+        inputs=[country_dropdown],
+        outputs=[country_code_state, price, price],
+    )
+
+    # Calculate button
+    def calculate_wrapper(birds, weeks, days, bag_size, price_per_bag, email, country_code_state, breed, request: gr.Request):
+        if not country_code_state:
+            country_code_state = "NG"
+        return calculate_feed(birds, weeks, days, bag_size, price_per_bag, email, country_code_state, breed, request)
+
+    calculate_btn.click(
+        fn=calculate_wrapper,
+        inputs=[birds, weeks, days, bag_size, price, email, country_code_state, breed],
+        outputs=[result, save_status],
+    )
+
+    ask_btn.click(
+        fn=answer_farmer_question,
+        inputs=[question, email, breed],
+        outputs=[question_answer],
+    )
+
+    # Track visits on page load
+    demo.load(
+        fn=track_visit,
+        inputs=None,
+        outputs=None,
+    )
+
+
+# ============================================================
+# START APP
+# ============================================================
+
+if __name__ == "__main__":
+    port = int(os.environ.get("PORT", 7860))
+    demo.launch(server_name="0.0.0.0", server_port=port, root_path="/")