from typing import Any, List

from fastapi import APIRouter, Body, Depends, HTTPException, status
from fastapi.encoders import jsonable_encoder
from sqlalchemy.orm import Session

from app.api import deps
from app.crud import crud_user
from app.models.user import User
from app.schemas.user import User as UserSchema
from app.schemas.user import UserUpdate

router = APIRouter()


@router.get("/me", response_model=UserSchema)
def read_user_me(
    current_user: User = Depends(deps.get_current_active_user),
) -> Any:
    """
    Get current user.
    """
    return current_user


@router.put("/me", response_model=UserSchema)
def update_user_me(
    *,
    db: Session = Depends(deps.get_db),
    password: str = Body(None),
    first_name: str = Body(None),
    last_name: str = Body(None),
    email: str = Body(None),
    current_user: User = Depends(deps.get_current_active_user),
) -> Any:
    """
    Update current user.
    """
    current_user_data = jsonable_encoder(current_user)
    user_in = UserUpdate(**current_user_data)
    if password is not None:
        user_in.password = password
    if first_name is not None:
        user_in.first_name = first_name
    if last_name is not None:
        user_in.last_name = last_name
    if email is not None:
        # Check if email already exists for another user
        existing_user = crud_user.user.get_by_email(db, email=email)
        if existing_user and existing_user.id != current_user.id:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail="Email already registered",
            )
        user_in.email = email

    user = crud_user.user.update(db, db_obj=current_user, obj_in=user_in)
    return user


@router.get("/{user_id}", response_model=UserSchema)
def read_user_by_id(
    user_id: int,
    current_user: User = Depends(deps.get_current_active_user),
    db: Session = Depends(deps.get_db),
) -> Any:
    """
    Get a specific user by id.
    """
    user = crud_user.user.get(db, id=user_id)
    if user == current_user:
        return user
    if not crud_user.user.is_superuser(current_user):
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="Not enough permissions",
        )
    return user


@router.get("/", response_model=List[UserSchema])
def read_users(
    db: Session = Depends(deps.get_db),
    skip: int = 0,
    limit: int = 100,
    current_user: User = Depends(deps.get_current_active_superuser),
) -> Any:
    """
    Retrieve users. Only for superusers.
    """
    users = crud_user.user.get_multi(db, skip=skip, limit=limit)
    return users