from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session
from typing import List, Optional
from pydantic import BaseModel
from config.database import SessionLocal
from models.consumption import Consumption

router = APIRouter(prefix="/api/consumption", tags=["Consumption"])


def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


# Pydantic schemas
class ConsumptionCreate(BaseModel):
    scenario_id: int
    amount: float
    description: Optional[str] = None


class ConsumptionRead(ConsumptionCreate):
    id: int

    class Config:
        orm_mode = True


@router.post("/", response_model=ConsumptionRead)
async def create_consumption(item: ConsumptionCreate, db: Session = Depends(get_db)):
    db_item = Consumption(**item.dict())
    db.add(db_item)
    db.commit()
    db.refresh(db_item)
    return db_item


@router.get("/", response_model=List[ConsumptionRead])
async def list_consumption(db: Session = Depends(get_db)):
    return db.query(Consumption).all()