from typing import Any, List

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

from app.api.deps import get_current_active_user
from app.crud import task as crud_task
from app.db.session import get_db
from app.models.user import User
from app.schemas.task import Task, TaskCreate, TaskUpdate

router = APIRouter()

@router.get("", response_model=List[Task])
def read_tasks(
    skip: int = 0,
    limit: int = 100,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_active_user),
) -> Any:
    """
    Retrieve tasks for the current user.
    """
    tasks = crud_task.get_multi(
        db=db, user_id=current_user.id, skip=skip, limit=limit
    )
    return tasks

@router.post("", response_model=Task, status_code=status.HTTP_201_CREATED)
def create_task(
    *,
    db: Session = Depends(get_db),
    task_in: TaskCreate,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    """
    Create a new task.
    """
    task = crud_task.create(db=db, obj_in=task_in, user_id=current_user.id)
    return task

@router.get("/{task_id}", response_model=Task)
def read_task(
    *,
    db: Session = Depends(get_db),
    task_id: int,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    """
    Get task by ID.
    """
    task = crud_task.get(db=db, task_id=task_id, user_id=current_user.id)
    if not task:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Task not found"
        )
    return task

@router.put("/{task_id}", response_model=Task)
def update_task(
    *,
    db: Session = Depends(get_db),
    task_id: int,
    task_in: TaskUpdate,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    """
    Update a task.
    """
    task = crud_task.get(db=db, task_id=task_id, user_id=current_user.id)
    if not task:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Task not found"
        )
    task = crud_task.update(db=db, db_obj=task, obj_in=task_in)
    return task

@router.delete(
    "/{task_id}",
    response_model=None,
    status_code=status.HTTP_204_NO_CONTENT
)
def delete_task(
    *,
    db: Session = Depends(get_db),
    task_id: int,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    """
    Delete a task.
    """
    task = crud_task.get(db=db, task_id=task_id, user_id=current_user.id)
    if not task:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Task not found"
        )
    crud_task.delete(db=db, task_id=task_id, user_id=current_user.id)
    return None