"""
Send password reset emails to Feb 4 batch import users who never logged in.

These users were imported with passwords but never received welcome emails.
This script generates reset tokens (24h validity) and sends reset emails.

Usage: Run on production server with DATABASE_URL set.
"""

import os
import sys
import secrets
from datetime import datetime, timedelta

# Add project root to path
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from database import SessionLocal, User, EmailLog
import email_service

# Users from Feb 4 batch import who never logged in
TARGET_USER_IDS = [53, 54, 55, 57, 58, 59, 60, 61, 62, 63, 64]

TOKEN_VALIDITY_HOURS = 24
BASE_URL = 'https://nordabiznes.pl'


def main():
    if not email_service.is_configured():
        print("ERROR: Email service not configured. Set credentials in .env")
        sys.exit(1)

    db = SessionLocal()
    try:
        results = {'sent': [], 'failed': [], 'skipped': []}

        for user_id in TARGET_USER_IDS:
            user = db.query(User).get(user_id)
            if not user:
                results['skipped'].append(f"ID {user_id}: not found")
                continue

            if not user.is_active:
                results['skipped'].append(f"{user.email}: inactive")
                continue

            if user.last_login is not None:
                results['skipped'].append(f"{user.email}: already logged in")
                continue

            # Generate token
            token = secrets.token_urlsafe(32)
            expires = datetime.now() + timedelta(hours=TOKEN_VALIDITY_HOURS)

            user.reset_token = token
            user.reset_token_expires = expires
            db.commit()

            reset_url = f"{BASE_URL}/reset-password/{token}"

            # Send email
            try:
                success = email_service.send_password_reset_email(user.email, reset_url)
                if success:
                    # Log the email
                    log = EmailLog(
                        email_type='password_reset',
                        recipient_email=user.email,
                        recipient_name=user.name,
                        subject='Reset hasła - Norda Biznes Partner',
                        status='sent',
                        sent_at=datetime.now(),
                        created_at=datetime.now(),
                    )
                    db.add(log)
                    db.commit()
                    results['sent'].append(f"{user.name} <{user.email}>")
                    print(f"  OK: {user.name} <{user.email}>")
                else:
                    results['failed'].append(f"{user.name} <{user.email}>: send returned False")
                    print(f"  FAIL: {user.name} <{user.email}>")
            except Exception as e:
                results['failed'].append(f"{user.name} <{user.email}>: {e}")
                print(f"  ERROR: {user.name} <{user.email}>: {e}")

        print(f"\n{'='*50}")
        print(f"Sent: {len(results['sent'])}")
        print(f"Failed: {len(results['failed'])}")
        print(f"Skipped: {len(results['skipped'])}")

        if results['failed']:
            print(f"\nFailed details:")
            for f in results['failed']:
                print(f"  - {f}")

        if results['skipped']:
            print(f"\nSkipped details:")
            for s in results['skipped']:
                print(f"  - {s}")

    finally:
        db.close()


if __name__ == '__main__':
    main()