from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from app.core.db import get_db
from app.schemas.param import ParamOut, ParamCreate, ParamUpdate
from app.models import SystemParam

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


@router.get("", response_model=list[ParamOut])
def list_params(db: Session = Depends(get_db)):
    return db.query(SystemParam).all()


@router.post("", response_model=ParamOut)
def create_param(payload: ParamCreate, db: Session = Depends(get_db)):
    exists = db.query(SystemParam).filter(SystemParam.param_key == payload.param_key).first()
    if exists:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Param key exists")
    item = SystemParam(
        param_key=payload.param_key,
        param_value=payload.param_value,
        param_type=payload.param_type,
        status=payload.status,
        is_system=payload.is_system,
        description=payload.description,
    )
    db.add(item)
    db.commit()
    db.refresh(item)
    return item


@router.put("/{param_id}", response_model=ParamOut)
def update_param(param_id: int, payload: ParamUpdate, db: Session = Depends(get_db)):
    item = db.query(SystemParam).filter(SystemParam.param_id == param_id).first()
    if not item:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Param not found")
    if payload.param_value is not None:
        item.param_value = payload.param_value
    if payload.param_type is not None:
        item.param_type = payload.param_type
    if payload.status is not None:
        item.status = payload.status
    if payload.is_system is not None:
        item.is_system = payload.is_system
    if payload.description is not None:
        item.description = payload.description
    db.commit()
    db.refresh(item)
    return item


@router.delete("/{param_id}")
def delete_param(param_id: int, db: Session = Depends(get_db)):
    item = db.query(SystemParam).filter(SystemParam.param_id == param_id).first()
    if not item:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Param not found")
    db.delete(item)
    db.commit()
    return {"status": "ok"}