# models/schema/order.py
"""
Pydantic schema for order operations.
"""

from datetime import datetime

from pydantic import BaseModel, ConfigDict, Field

# ============================================================================
# Order Item Schemas
# ============================================================================


class OrderItemCreate(BaseModel):
    """Schema for creating an order item."""

    product_id: int
    quantity: int = Field(..., ge=1)


class OrderItemResponse(BaseModel):
    """Schema for order item response."""

    model_config = ConfigDict(from_attributes=True)

    id: int
    order_id: int
    product_id: int
    product_name: str
    product_sku: str | None
    quantity: int
    unit_price: float
    total_price: float
    inventory_reserved: bool
    inventory_fulfilled: bool
    created_at: datetime
    updated_at: datetime


# ============================================================================
# Order Address Schemas
# ============================================================================


class OrderAddressCreate(BaseModel):
    """Schema for order address (shipping/billing)."""

    first_name: str = Field(..., min_length=1, max_length=100)
    last_name: str = Field(..., min_length=1, max_length=100)
    company: str | None = Field(None, max_length=200)
    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=100)


class OrderAddressResponse(BaseModel):
    """Schema for order address response."""

    model_config = ConfigDict(from_attributes=True)

    id: int
    address_type: str
    first_name: str
    last_name: str
    company: str | None
    address_line_1: str
    address_line_2: str | None
    city: str
    postal_code: str
    country: str


# ============================================================================
# Order Create/Update Schemas
# ============================================================================


class OrderCreate(BaseModel):
    """Schema for creating an order."""

    customer_id: int | None = None  # Optional for guest checkout
    items: list[OrderItemCreate] = Field(..., min_length=1)

    # Addresses
    shipping_address: OrderAddressCreate
    billing_address: OrderAddressCreate | None = None  # Use shipping if not provided

    # Optional fields
    shipping_method: str | None = None
    customer_notes: str | None = Field(None, max_length=1000)

    # Cart/session info
    session_id: str | None = None


class OrderUpdate(BaseModel):
    """Schema for updating order status."""

    status: str | None = Field(
        None, pattern="^(pending|processing|shipped|delivered|cancelled|refunded)$"
    )
    tracking_number: str | None = None
    internal_notes: str | None = None


# ============================================================================
# Order Response Schemas
# ============================================================================


class OrderResponse(BaseModel):
    """Schema for order response."""

    model_config = ConfigDict(from_attributes=True)

    id: int
    vendor_id: int
    customer_id: int
    order_number: str
    status: str

    # Financial
    subtotal: float
    tax_amount: float
    shipping_amount: float
    discount_amount: float
    total_amount: float
    currency: str

    # Shipping
    shipping_method: str | None
    tracking_number: str | None

    # Notes
    customer_notes: str | None
    internal_notes: str | None

    # Timestamps
    created_at: datetime
    updated_at: datetime
    paid_at: datetime | None
    shipped_at: datetime | None
    delivered_at: datetime | None
    cancelled_at: datetime | None


class OrderDetailResponse(OrderResponse):
    """Schema for detailed order response with items and addresses."""

    items: list[OrderItemResponse]
    shipping_address: OrderAddressResponse
    billing_address: OrderAddressResponse


class OrderListResponse(BaseModel):
    """Schema for paginated order list."""

    orders: list[OrderResponse]
    total: int
    skip: int
    limit: int