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

from app.api.deps import get_current_user, get_db
from app.models.customer import Customer
from app.schemas import CurrentUser, CustomerOptionOut

router = APIRouter(prefix="/api/v1/customers", tags=["customers"])


@router.get("", response_model=list[CustomerOptionOut])
def search_customers(
    query: str = Query(min_length=2, max_length=100),
    limit: int = Query(default=20, ge=1, le=50),
    db: Session = Depends(get_db),
    _user: CurrentUser = Depends(get_current_user),
) -> list[CustomerOptionOut]:
    term = f"%{query.strip()}%"
    customers = db.scalars(
        select(Customer)
        .where(
            Customer.merged_into_customer_id.is_(None),
            Customer.anonymized_at.is_(None),
            or_(
                Customer.public_ref.ilike(term),
                Customer.first_name.ilike(term),
                Customer.last_name.ilike(term),
                Customer.email.ilike(term),
            ),
        )
        .order_by(Customer.last_name, Customer.first_name)
        .limit(limit)
    ).all()
    return [
        CustomerOptionOut(
            public_ref=customer.public_ref,
            display_name=f"{customer.first_name} {customer.last_name}",
            email=customer.email,
        )
        for customer in customers
    ]