from fastapi import APIRouter, HTTPException
from datetime import datetime, timedelta
import uuid

deliveries = []  # In-memory storage

router = APIRouter()

@router.post("/deliveries")
async def create_delivery(
    pickup_time: datetime,
    delivery_time: datetime,
    delay_minutes: int = 0
):
    """Demo delivery scheduling endpoint"""
    if pickup_time >= delivery_time:
        raise HTTPException(status_code=400, detail="Pickup must be before delivery")

    delivery_id = str(uuid.uuid4())
    
    adjusted_delivery = delivery_time + timedelta(minutes=delay_minutes)
    
    deliveries.append({
        "id": delivery_id,
        "pickup_time": pickup_time,
        "delivery_time": adjusted_delivery,
        "status": "scheduled"
    })

    return {
        "message": "Delivery scheduled successfully",
        "delivery_id": delivery_id,
        "schedule": {
            "pickup": pickup_time.isoformat(),
            "delivery": adjusted_delivery.isoformat(),
            "delay_applied": delay_minutes
        },
        "features": {
            "tracking_enabled": True,
            "notifications": True
        }
    }