#!/usr/bin/env python3
"""
Example script demonstrating the use of the business models.
"""
import datetime
from typing import List

from sqlmodel import Session, SQLModel, create_engine, select

from models import (
    Currency,
    Customer,
    Product,
    ProductComponent,
    ProductStatus,
    ProductType,
    Sale,
    SaleItem,
    SaleStatus,
)


def create_tables(engine):
    """Create all tables in the database"""
    SQLModel.metadata.create_all(engine)


def create_sample_data(session: Session) -> None:
    """Create sample data for demonstration"""
    # Create currencies
    usd = Currency(currency_code="USD", amount=0.0)
    eur = Currency(currency_code="EUR", amount=0.0)
    session.add(usd)
    session.add(eur)
    session.commit()

    # Create a customer
    customer = Customer.new(
        name="Acme Corporation",
        description="A fictional company",
        pubkey="acme123456",
        contact_sids=["circle1_contact123", "circle2_contact456"]
    )
    session.add(customer)
    session.commit()

    # Create product components
    cpu_component = ProductComponent.new(
        name="CPU",
        description="Central Processing Unit",
        quantity=1,
    )
    ram_component = ProductComponent.new(
        name="RAM",
        description="Random Access Memory",
        quantity=2,
    )
    session.add(cpu_component)
    session.add(ram_component)
    session.commit()

    # Create products
    laptop_price = Currency(currency_code="USD", amount=1200.0)
    session.add(laptop_price)
    session.commit()

    laptop = Product.new(
        name="Laptop",
        description="High-performance laptop",
        price=laptop_price,
        type_=ProductType.PRODUCT,
        category="Electronics",
        status=ProductStatus.AVAILABLE,
        max_amount=100,
        validity_days=365,
        istemplate=False,
    )
    laptop.add_component(cpu_component)
    laptop.add_component(ram_component)
    session.add(laptop)
    session.commit()

    support_price = Currency(currency_code="USD", amount=50.0)
    session.add(support_price)
    session.commit()

    support = Product.new(
        name="Technical Support",
        description="24/7 technical support",
        price=support_price,
        type_=ProductType.SERVICE,
        category="Support",
        status=ProductStatus.AVAILABLE,
        max_amount=1000,
        validity_days=30,
        istemplate=True,  # This is a template product
    )
    session.add(support)
    session.commit()

    # Create a sale
    sale = Sale.new(
        customer=customer,
        currency_code="USD",
    )
    session.add(sale)
    session.commit()

    # Create sale items
    laptop_unit_price = Currency(currency_code="USD", amount=1200.0)
    session.add(laptop_unit_price)
    session.commit()

    laptop_item = SaleItem.new(
        product=laptop,
        quantity=1,
        unit_price=laptop_unit_price,
        active_till=datetime.datetime.utcnow() + datetime.timedelta(days=365),
    )
    sale.add_item(laptop_item)

    support_unit_price = Currency(currency_code="USD", amount=50.0)
    session.add(support_unit_price)
    session.commit()

    support_item = SaleItem.new(
        product=support,
        quantity=2,
        unit_price=support_unit_price,
        active_till=datetime.datetime.utcnow() + datetime.timedelta(days=30),
    )
    sale.add_item(support_item)

    # Complete the sale
    sale.update_status(SaleStatus.COMPLETED)
    session.commit()


def query_data(session: Session) -> None:
    """Query and display data from the database"""
    print("\n=== Customers ===")
    customers = session.exec(select(Customer)).all()
    for customer in customers:
        print(f"Customer: {customer.name} ({customer.pubkey})")
        print(f"  Description: {customer.description}")
        print(f"  Contact SIDs: {', '.join(customer.contact_sids)}")
        print(f"  Created at: {customer.created_at}")

    print("\n=== Products ===")
    products = session.exec(select(Product)).all()
    for product in products:
        print(f"Product: {product.name} ({product.type_.value})")
        print(f"  Description: {product.description}")
        print(f"  Price: {product.price.amount} {product.price.currency_code}")
        print(f"  Status: {product.status.value}")
        print(f"  Is Template: {product.istemplate}")
        print(f"  Components:")
        for component in product.components:
            print(f"    - {component.name}: {component.quantity}")

    print("\n=== Sales ===")
    sales = session.exec(select(Sale)).all()
    for sale in sales:
        print(f"Sale to: {sale.customer.name}")
        print(f"  Status: {sale.status.value}")
        print(f"  Total: {sale.total_amount.amount} {sale.total_amount.currency_code}")
        print(f"  Items:")
        for item in sale.items:
            print(f"    - {item.name}: {item.quantity} x {item.unit_price.amount} = {item.subtotal.amount} {item.subtotal.currency_code}")


def main():
    """Main function"""
    print("Creating in-memory SQLite database...")
    engine = create_engine("sqlite:///business.db", echo=False)
    
    print("Creating tables...")
    create_tables(engine)
    
    print("Creating sample data...")
    with Session(engine) as session:
        create_sample_data(session)
    
    print("Querying data...")
    with Session(engine) as session:
        query_data(session)


if __name__ == "__main__":
    main()