"""충전기 관리 API"""

from typing import List

from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.database import get_db
from app.models import Charger
from app.schemas import ChargerCreate, ChargerOut
from app.services.steve_client import steve_client

router = APIRouter(prefix="/chargers", tags=["충전기"])


@router.get("/", response_model=List[ChargerOut])
async def list_chargers(
    active_only: bool = True,
    db: AsyncSession = Depends(get_db),
):
    """등록된 충전기 목록"""
    stmt = select(Charger)
    if active_only:
        stmt = stmt.where(Charger.is_active == True)
    result = await db.execute(stmt)
    return result.scalars().all()


@router.post("/", response_model=ChargerOut, status_code=201)
async def register_charger(
    data: ChargerCreate,
    db: AsyncSession = Depends(get_db),
):
    """새 충전기 등록

    FastAPI DB에 등록. Steve에도 이미 chargeBoxId가
    등록되어 있어야 OCPP 통신 가능.
    """
    # 중복 확인
    existing = await db.execute(
        select(Charger).where(Charger.charge_box_id == data.charge_box_id)
    )
    if existing.scalar_one_or_none():
        raise HTTPException(409, f"이미 등록된 충전기: {data.charge_box_id}")

    charger = Charger(**data.model_dump())
    db.add(charger)
    await db.flush()
    await db.refresh(charger)
    return charger


@router.get("/{charge_box_id}", response_model=ChargerOut)
async def get_charger(
    charge_box_id: str,
    db: AsyncSession = Depends(get_db),
):
    """충전기 상세 정보"""
    result = await db.execute(
        select(Charger).where(Charger.charge_box_id == charge_box_id)
    )
    charger = result.scalar_one_or_none()
    if not charger:
        raise HTTPException(404, "충전기를 찾을 수 없습니다")
    return charger


@router.get("/{charge_box_id}/steve-status")
async def get_steve_status(charge_box_id: str):
    """Steve 서버에서 충전기 실시간 상태 조회"""
    data = await steve_client.get_charge_point(charge_box_id)
    if not data:
        raise HTTPException(502, "Steve 서버 응답 없음")
    return data


@router.delete("/{charge_box_id}")
async def deactivate_charger(
    charge_box_id: str,
    db: AsyncSession = Depends(get_db),
):
    """충전기 비활성화 (soft delete)"""
    result = await db.execute(
        select(Charger).where(Charger.charge_box_id == charge_box_id)
    )
    charger = result.scalar_one_or_none()
    if not charger:
        raise HTTPException(404, "충전기를 찾을 수 없습니다")

    charger.is_active = False
    return {"message": f"{charge_box_id} 비활성화 완료"}