# app/api/v1/public/vendors/orders.py
"""
Customer order endpoints (public-facing).
"""

import logging
from typing import Optional

from fastapi import APIRouter, Depends, Path, Query
from sqlalchemy.orm import Session

from app.core.database import get_db
from app.services.order_service import order_service
from app.services.customer_service import customer_service
from models.schema.order import (
    OrderCreate,
    OrderResponse,
    OrderDetailResponse,
    OrderListResponse
)
from models.database.vendor import Vendor
from models.database.customer import Customer

router = APIRouter()
logger = logging.getLogger(__name__)


def get_current_customer(
        vendor_id: int,
        customer_id: int,
        db: Session
) -> Customer:
    """Helper to get and verify customer."""
    customer = customer_service.get_customer(
        db=db,
        vendor_id=vendor_id,
        customer_id=customer_id
    )
    return customer


@router.post("/{vendor_id}/orders", response_model=OrderResponse)
def place_order(
        vendor_id: int = Path(..., description="Vendor ID"),
        order_data: OrderCreate = ...,
        db: Session = Depends(get_db),
):
    """
    Place a new order.

    Customer must be authenticated to place an order.
    This endpoint creates an order from the customer's cart.
    """
    # Verify vendor exists and is active
    vendor = db.query(Vendor).filter(
        Vendor.id == vendor_id,
        Vendor.is_active == True
    ).first()

    if not vendor:
        from app.exceptions import VendorNotFoundException
        raise VendorNotFoundException(str(vendor_id), identifier_type="id")

    # Create order
    order = order_service.create_order(
        db=db,
        vendor_id=vendor_id,
        order_data=order_data
    )

    logger.info(
        f"Order {order.order_number} placed for vendor {vendor.vendor_code}, "
        f"total: €{order.total_amount:.2f}"
    )

    # TODO: Update customer stats
    # TODO: Clear cart
    # TODO: Send order confirmation email

    return OrderResponse.model_validate(order)


@router.get("/{vendor_id}/customers/{customer_id}/orders", response_model=OrderListResponse)
def get_customer_orders(
        vendor_id: int = Path(..., description="Vendor ID"),
        customer_id: int = Path(..., description="Customer ID"),
        skip: int = Query(0, ge=0),
        limit: int = Query(50, ge=1, le=100),
        db: Session = Depends(get_db),
):
    """
    Get order history for customer.

    Returns all orders placed by the authenticated customer.
    """
    # Verify vendor
    vendor = db.query(Vendor).filter(
        Vendor.id == vendor_id,
        Vendor.is_active == True
    ).first()

    if not vendor:
        from app.exceptions import VendorNotFoundException
        raise VendorNotFoundException(str(vendor_id), identifier_type="id")

    # Verify customer belongs to vendor
    customer = get_current_customer(vendor_id, customer_id, db)

    # Get orders
    orders, total = order_service.get_customer_orders(
        db=db,
        vendor_id=vendor_id,
        customer_id=customer_id,
        skip=skip,
        limit=limit
    )

    return OrderListResponse(
        orders=[OrderResponse.model_validate(o) for o in orders],
        total=total,
        skip=skip,
        limit=limit
    )


@router.get("/{vendor_id}/customers/{customer_id}/orders/{order_id}", response_model=OrderDetailResponse)
def get_customer_order_details(
        vendor_id: int = Path(..., description="Vendor ID"),
        customer_id: int = Path(..., description="Customer ID"),
        order_id: int = Path(..., description="Order ID"),
        db: Session = Depends(get_db),
):
    """
    Get detailed order information for customer.

    Customer can only view their own orders.
    """
    # Verify vendor
    vendor = db.query(Vendor).filter(
        Vendor.id == vendor_id,
        Vendor.is_active == True
    ).first()

    if not vendor:
        from app.exceptions import VendorNotFoundException
        raise VendorNotFoundException(str(vendor_id), identifier_type="id")

    # Verify customer
    customer = get_current_customer(vendor_id, customer_id, db)

    # Get order
    order = order_service.get_order(
        db=db,
        vendor_id=vendor_id,
        order_id=order_id
    )

    # Verify order belongs to customer
    if order.customer_id != customer_id:
        from app.exceptions import OrderNotFoundException
        raise OrderNotFoundException(str(order_id))

    return OrderDetailResponse.model_validate(order)