# Vendor customer management
# app/api/v1/vendor/customers.py
"""
Vendor customer management endpoints.

Vendor Context: Uses token_vendor_id from JWT token (authenticated vendor API pattern)
"""

import logging

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

from app.api.deps import get_current_vendor_api
from app.core.database import get_db
from app.exceptions import InvalidTokenException
from app.services.vendor_service import vendor_service
from models.database.user import User

router = APIRouter(prefix="/customers")
logger = logging.getLogger(__name__)


def _get_vendor_from_token(current_user: User, db: Session):
    """Helper to get vendor from JWT token."""
    if not hasattr(current_user, "token_vendor_id"):
        raise InvalidTokenException("Token missing vendor information. Please login again.")
    return vendor_service.get_vendor_by_id(db, current_user.token_vendor_id)


@router.get("")
def get_vendor_customers(
    skip: int = Query(0, ge=0),
    limit: int = Query(100, ge=1, le=1000),
    search: str | None = Query(None),
    is_active: bool | None = Query(None),
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get all customers for this vendor.

    TODO: Implement in Slice 4
    - Query customers filtered by vendor_id
    - Support search by name/email
    - Support filtering by active status
    - Return paginated results
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {
        "customers": [],
        "total": 0,
        "skip": skip,
        "limit": limit,
        "message": "Customer management coming in Slice 4",
    }


@router.get("/{customer_id}")
def get_customer_details(
    customer_id: int,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get detailed customer information.

    TODO: Implement in Slice 4
    - Get customer by ID
    - Verify customer belongs to vendor
    - Include order history
    - Include total spent, etc.
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {"message": "Customer details coming in Slice 4"}


@router.get("/{customer_id}/orders")
def get_customer_orders(
    customer_id: int,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get order history for a specific customer.

    TODO: Implement in Slice 5
    - Get all orders for customer
    - Filter by vendor_id
    - Return order details
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {"orders": [], "message": "Customer orders coming in Slice 5"}


@router.put("/{customer_id}")
def update_customer(
    customer_id: int,
    customer_data: dict,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Update customer information.

    TODO: Implement in Slice 4
    - Update customer details
    - Verify customer belongs to vendor
    - Update customer preferences
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {"message": "Customer update coming in Slice 4"}


@router.put("/{customer_id}/status")
def toggle_customer_status(
    customer_id: int,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Activate/deactivate customer account.

    TODO: Implement in Slice 4
    - Toggle customer is_active status
    - Verify customer belongs to vendor
    - Log the change
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {"message": "Customer status toggle coming in Slice 4"}


@router.get("/{customer_id}/stats")
def get_customer_statistics(
    customer_id: int,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get customer statistics and metrics.

    TODO: Implement in Slice 4
    - Total orders
    - Total spent
    - Average order value
    - Last order date
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {
        "total_orders": 0,
        "total_spent": 0.0,
        "average_order_value": 0.0,
        "last_order_date": None,
        "message": "Customer statistics coming in Slice 4",
    }