from fastapi import APIRouter, HTTPException

customers = []  # In-memory storage

router = APIRouter()

@router.post("/signup")
async def list_customers(
    store_id: str = "default_store",
    page: int = 1,
    limit: int = 10
):
    """Get list of store customers"""
    if not any(c["store_id"] == store_id for c in customers):
        raise HTTPException(status_code=400, detail="Store not found")

    store_customers = [c for c in customers if c["store_id"] == store_id]
    start = (page - 1) * limit
    end = start + limit

    return {
        "message": "Customers retrieved successfully",
        "store_id": store_id,
        "customers": store_customers[start:end],
        "pagination": {
            "page": page,
            "total": len(store_customers),
            "pages": (len(store_customers) + limit - 1) // limit
        }
    }