# app/modules/checkout/schemas/checkout.py
"""
Pydantic schemas for checkout operations.

These schemas handle the conversion of a shopping cart into an order.
"""

from pydantic import BaseModel, Field


class ShippingAddress(BaseModel):
    """Shipping address for checkout."""

    first_name: str = Field(..., min_length=1, max_length=100)
    last_name: str = Field(..., min_length=1, max_length=100)
    address_line_1: str = Field(..., min_length=1, max_length=255)
    address_line_2: str | None = Field(None, max_length=255)
    city: str = Field(..., min_length=1, max_length=100)
    postal_code: str = Field(..., min_length=1, max_length=20)
    country: str = Field(..., min_length=2, max_length=2)  # ISO 3166-1 alpha-2
    phone: str | None = Field(None, max_length=20)


class CheckoutRequest(BaseModel):
    """Request to initiate checkout."""

    session_id: str = Field(..., description="Cart session ID")
    shipping_address: ShippingAddress = Field(..., description="Shipping address")
    billing_same_as_shipping: bool = Field(
        True, description="Use shipping address for billing"
    )
    billing_address: ShippingAddress | None = Field(
        None, description="Billing address (if different from shipping)"
    )
    customer_email: str = Field(..., description="Customer email for order confirmation")
    customer_note: str | None = Field(None, description="Optional customer note")


class CheckoutSessionResponse(BaseModel):
    """Response for checkout session creation."""

    checkout_session_id: str = Field(..., description="Checkout session ID")
    cart_total: float = Field(..., description="Cart total in euros")
    item_count: int = Field(..., description="Number of items in cart")
    requires_payment: bool = Field(..., description="Whether payment is required")


class CheckoutResponse(BaseModel):
    """Response for completed checkout."""

    order_id: int = Field(..., description="Created order ID")
    order_number: str = Field(..., description="Human-readable order number")
    total: float = Field(..., description="Order total in euros")
    message: str = Field(..., description="Confirmation message")