from datetime import datetime
from typing import Annotated

from fastapi import APIRouter, Depends, Query, HTTPException, Path
from pydantic import constr

from domain.value_objects import Granularity
from domain.exceptions import ValidationError, DatabaseError
from services.consumption_service import ConsumptionService
from dependencies import get_consumption_service

from ._readings_schemas import ConsumptionResponseSchema

readings_router = APIRouter(prefix="/readings", tags=["readings"])

DevEUI = Annotated[constr(max_length=64, pattern=r'^[0-9A-Fa-f]+$'), Path()]

@readings_router.get("/{dev_eui}", response_model=ConsumptionResponseSchema)
def get_consumption(
    dev_eui: DevEUI,
    start: Annotated[datetime, Query()],
    end: Annotated[datetime, Query()],
    granularity: Annotated[Granularity, Query()] = "day",
    service: ConsumptionService = Depends(get_consumption_service),
):
    try:
        result = service.get_consumption(dev_eui, start, end, granularity)
        return ConsumptionResponseSchema.from_domain(result)
    except ValidationError as e:
        raise HTTPException(status_code=422, detail=str(e))
    except DatabaseError as e:
        raise HTTPException(status_code=500, detail=str(e))