import os
import datetime
import firebase_admin
from firebase_admin import credentials, firestore, messaging

# V5.9.10: Inactivity Poker - Sends push to users inactive for 7 days
def run_inactivity_check():
    # 1. Initialize Firebase (assuming creds are in environment or default)
    if not firebase_admin._apps:
        cred = credentials.ApplicationDefault()
        firebase_admin.initialize_app(cred)
    
    db = firestore.client()
    
    # 2. Fetch CMS templates
    print("📡 Fetching CMS templates...")
    cms_doc = db.collection('system_config').document('notifications').get()
    if cms_doc.exists:
        template = cms_doc.to_dict().get('practice_reminder', {})
    else:
        template = {
            'title': 'המורה מתגעגעת 🧮',
            'body': 'היי! לא תרגלנו כבר שבוע. יש משהו שאפשר לעזור בו?'
        }
    
    print(f"📝 CMS Template loaded: {template.get('title')}")

    # 3. Calculate 7 days ago
    seven_days_ago = (datetime.datetime.now() - datetime.timedelta(days=7)).strftime('%Y-%m-%d')
    print(f"🔍 Searching for users active last on: {seven_days_ago}")

    # 4. Query users
    users_ref = db.collection('users')
    inactive_users = users_ref.where('last_active_date', '==', seven_days_ago).stream()

    total_sent = 0
    for user in inactive_users:
        data = user.to_dict()
        fcm_token = data.get('fcm_token') or data.get('fcmToken')
        uid = data.get('uid')
        name = data.get('name', 'תלמיד/ה')

        if fcm_token:
            print(f"🚀 Sending push to {name} ({uid})...")
            try:
                # Build localized message
                body = template.get('body', '').replace('{name}', name)
                
                message = messaging.Message(
                    notification=messaging.Notification(
                        title=template.get('title'),
                        body=body,
                    ),
                    token=fcm_token,
                    data={
                        'type': 'practice_reminder',
                        'click_action': 'FLUTTER_NOTIFICATION_CLICK'
                    }
                )
                messaging.send(message)
                total_sent += 1
            except Exception as e:
                print(f"❌ Failed to send to {uid}: {e}")
        else:
            print(f"⚠️ No FCM token for {name} ({uid})")

    print(f"✅ Inactivity check done. Total pushes sent: {total_sent}")

if __name__ == "__main__":
    run_inactivity_check()