from fastapi import APIRouter, HTTPException
import uuid

users = []  # In-memory storage

router = APIRouter()

@router.post("/login")
async def login_user(
    username: str = "new_user",
    password: str = "securepassword123"
):
    """User login endpoint"""
    user = next((u for u in users if u["username"] == username), None)
    if not user or user["password"] != password:
        raise HTTPException(status_code=400, detail="Invalid credentials")

    return {
        "message": "Login successful",
        "user": username,
        "token": "jwt_token_" + str(uuid.uuid4()),
        "features": {
            "rate_limit": 100,
            "expires_in": 3600
        }
    }