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

from app.db.deps import get_db
from app.schemas.todo import Todo as TodoSchema
from app.schemas.todo import TodoCreate, TodoUpdate
from app.services.todo import (
    get_todos,
    get_todo,
    create_todo,
    update_todo,
    delete_todo,
)

router = APIRouter()


@router.get("/", response_model=List[TodoSchema])
def read_todos(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
    """
    Retrieve todos.
    """
    todos = get_todos(db, skip=skip, limit=limit)
    return todos


@router.post("/", response_model=TodoSchema, status_code=status.HTTP_201_CREATED)
def create_new_todo(todo_in: TodoCreate, db: Session = Depends(get_db)):
    """
    Create new todo.
    """
    todo = create_todo(db=db, todo=todo_in)
    return todo


@router.get("/{todo_id}", response_model=TodoSchema)
def read_todo(todo_id: int, db: Session = Depends(get_db)):
    """
    Get a specific todo by id.
    """
    todo = get_todo(db=db, todo_id=todo_id)
    if todo is None:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="Todo not found"
        )
    return todo


@router.put("/{todo_id}", response_model=TodoSchema)
def update_todo_item(todo_id: int, todo_in: TodoUpdate, db: Session = Depends(get_db)):
    """
    Update a todo.
    """
    todo = update_todo(db=db, todo_id=todo_id, todo_update=todo_in)
    if todo is None:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="Todo not found"
        )
    return todo


@router.delete(
    "/{todo_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None
)
def delete_todo_item(todo_id: int, db: Session = Depends(get_db)):
    """
    Delete a todo.
    """
    deleted = delete_todo(db=db, todo_id=todo_id)
    if not deleted:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="Todo not found"
        )
    return None