from sqlalchemy.orm import Session
from fastapi import HTTPException, status, BackgroundTasks
from typing import List, Optional
import uuid
from app.models.auth.user_model import User
from app.schemas.auth.user_schema import UserCreate, UserUpdate
from app.services.auth.user_service import UserService

class UserController:
    @staticmethod
    def _resolve_tenant_id(current_user: User, requested_tenant_id: Optional[uuid.UUID]) -> Optional[uuid.UUID]:
        if current_user.tenant_id is None:
            return requested_tenant_id

        if requested_tenant_id and requested_tenant_id != current_user.tenant_id:
            raise HTTPException(
                status_code=status.HTTP_403_FORBIDDEN,
                detail="Not authorized to access this tenant"
            )

        return current_user.tenant_id

    @staticmethod
    def create_user(db: Session, user_data: UserCreate, current_user: User, background_tasks: BackgroundTasks) -> User:
        tenant_id = UserController._resolve_tenant_id(current_user, user_data.tenant_id)
        return UserService.create_user(db, user_data, tenant_id, background_tasks)

    @staticmethod
    def get_all_users(db: Session, current_user: User) -> List[User]:
        tenant_id = current_user.tenant_id
        return UserService.get_all_users(db, tenant_id)

    @staticmethod
    def get_user_by_id(db: Session, user_id: uuid.UUID, current_user: User) -> User:
        tenant_id = current_user.tenant_id
        return UserService.get_user_by_id(db, user_id, tenant_id)

    @staticmethod
    def update_user(db: Session, user_id: uuid.UUID, user_data: UserUpdate, current_user: User, background_tasks: BackgroundTasks) -> User:
        if current_user.tenant_id is not None and user_data.tenant_id is not None:
            UserController._resolve_tenant_id(current_user, user_data.tenant_id)

        tenant_id = current_user.tenant_id
        return UserService.update_user(db, user_id, user_data, tenant_id, background_tasks)

    @staticmethod
    def delete_user(db: Session, user_id: uuid.UUID, current_user: User):
        tenant_id = current_user.tenant_id
        return UserService.delete_user(db, user_id, tenant_id)

    @staticmethod
    def get_users_paginated(
        db: Session,
        current_user: User,
        page: int = 1,
        page_size: int = 10,
        search: Optional[str] = None,
        status: Optional[str] = None,
    ):
        tenant_id = current_user.tenant_id
        return UserService.get_users_paginated(
            db=db,
            tenant_id=tenant_id,
            page=page,
            page_size=page_size,
            search=search,
            status=status,
        )