import sys
import os
from datetime import datetime, timedelta
# Add parent directory to path to import from src
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from sqlalchemy.orm import Session
from src.shared.config.database import SessionLocal
from src.loyalty.models.promotion import Promotion, DiscountType

def seed_promotions(db: Session):
    """Seed promotions that match the homepage promotion codes"""
    
    # Calculate dates relative to current UTC date
    # Use UTC consistently to match validation logic
    now = datetime.utcnow()
    
    # Start date: Start of today (00:00:00) to ensure promotion is immediately active
    start_date = datetime(now.year, now.month, now.day, 0, 0, 0)
    
    # End dates: future dates at end of day (23:59:59)
    next_month_date = now + timedelta(days=30)
    next_month = datetime(next_month_date.year, next_month_date.month, next_month_date.day, 23, 59, 59)
    
    next_3_months_date = now + timedelta(days=90)
    next_3_months = datetime(next_3_months_date.year, next_3_months_date.month, next_3_months_date.day, 23, 59, 59)
    
    next_6_months_date = now + timedelta(days=180)
    next_6_months = datetime(next_6_months_date.year, next_6_months_date.month, next_6_months_date.day, 23, 59, 59)
    
    promotions_data = [
        {
            'code': 'EARLYBIRD20',
            'name': 'Early Bird Special',
            'description': 'Book 30 days in advance and save 20% on your stay. Perfect for planning ahead!',
            'discount_type': DiscountType.percentage,
            'discount_value': 20.00,
            'start_date': start_date,
            'end_date': next_3_months,
            'is_active': True,
            'min_booking_amount': None,
            'max_discount_amount': None,
            'usage_limit': None,
        },
        {
            'code': 'WEEKEND30',
            'name': 'Weekend Getaway',
            'description': 'Perfect weekend escape with complimentary breakfast and spa access. Relax and unwind!',
            'discount_type': DiscountType.percentage,
            'discount_value': 30.00,
            'start_date': start_date,
            'end_date': next_month,
            'is_active': True,
            'min_booking_amount': None,
            'max_discount_amount': None,
            'usage_limit': None,
        },
        {
            'code': 'LUXURY200',
            'name': 'Luxury Suite Package',
            'description': 'Experience our premium suites with exclusive amenities, fine dining, and concierge service',
            'discount_type': DiscountType.fixed_amount,
            'discount_value': 200.00,
            'start_date': start_date,
            'end_date': next_6_months,
            'is_active': True,
            'min_booking_amount': None,  # No minimum for now
            'max_discount_amount': None,
            'usage_limit': None,
        },
        {
            'code': 'HONEYMOON25',
            'name': 'Honeymoon Special',
            'description': 'Romantic getaway with champagne, flowers, special amenities, and complimentary room upgrade',
            'discount_type': DiscountType.percentage,
            'discount_value': 25.00,
            'start_date': start_date,
            'end_date': next_3_months,
            'is_active': True,
            'min_booking_amount': None,
            'max_discount_amount': None,
            'usage_limit': None,
        },
        {
            'code': 'FAMILY15',
            'name': 'Family Fun Package',
            'description': 'Perfect for families! Includes family room, kids activities, and complimentary meals for children under 12',
            'discount_type': DiscountType.percentage,
            'discount_value': 15.00,
            'start_date': start_date,
            'end_date': next_6_months,
            'is_active': True,
            'min_booking_amount': None,
            'max_discount_amount': None,
            'usage_limit': None,
        },
        {
            'code': 'BUSINESS10',
            'name': 'Business Traveler',
            'description': 'Extended stay discounts for business travelers. Includes high-speed WiFi, workspace, and airport transfer',
            'discount_type': DiscountType.percentage,
            'discount_value': 10.00,
            'start_date': start_date,
            'end_date': next_3_months,
            'is_active': True,
            'min_booking_amount': None,
            'max_discount_amount': None,
            'usage_limit': None,
        },
    ]
    
    created_count = 0
    updated_count = 0
    
    for promo_data in promotions_data:
        existing = db.query(Promotion).filter(Promotion.code == promo_data['code']).first()
        
        if existing:
            # Update existing promotion
            for key, value in promo_data.items():
                if key != 'code':  # Don't update the code
                    setattr(existing, key, value)
            existing.updated_at = datetime.utcnow()
            updated_count += 1
            print(f'✓ Updated promotion: {promo_data["code"]}')
        else:
            # Create new promotion
            promotion = Promotion(**promo_data)
            db.add(promotion)
            created_count += 1
            print(f'✓ Created promotion: {promo_data["code"]}')
    
    db.commit()
    print(f'\n✓ Promotions seeded: {created_count} created, {updated_count} updated')

def main():
    db: Session = SessionLocal()
    try:
        print('=' * 80)
        print('SEEDING PROMOTIONS')
        print('=' * 80)
        print()
        seed_promotions(db)
        print('\n' + '=' * 80)
        print('✓ All promotions seeded successfully!')
        print('=' * 80)
    except Exception as e:
        db.rollback()
        print(f'\n✗ Error seeding promotions: {e}')
        import traceback
        traceback.print_exc()
        raise
    finally:
        db.close()

if __name__ == '__main__':
    main()