from typing import List

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

from app.crud import todo as todo_crud
from app.db.session import get_db
from app.schemas.todo import TodoCreate, TodoResponse, TodoUpdate

router = APIRouter()


@router.get("/todos/", response_model=List[TodoResponse])
def read_todos(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
    """Get all todos with optional pagination"""
    todos = todo_crud.get_todos(db, skip=skip, limit=limit)
    return todos


@router.post(
    "/todos/", response_model=TodoResponse, status_code=status.HTTP_201_CREATED
)
def create_todo(todo: TodoCreate, db: Session = Depends(get_db)):
    """Create a new todo"""
    return todo_crud.create_todo(db=db, todo=todo)


@router.get("/todos/{todo_id}", response_model=TodoResponse)
def read_todo(todo_id: int, db: Session = Depends(get_db)):
    """Get a specific todo by ID"""
    db_todo = todo_crud.get_todo(db, todo_id=todo_id)
    if db_todo is None:
        raise HTTPException(status_code=404, detail="Todo not found")
    return db_todo


@router.put("/todos/{todo_id}", response_model=TodoResponse)
def update_todo(todo_id: int, todo: TodoUpdate, db: Session = Depends(get_db)):
    """Update a todo by ID"""
    db_todo = todo_crud.update_todo(db, todo_id=todo_id, todo=todo)
    if db_todo is None:
        raise HTTPException(status_code=404, detail="Todo not found")
    return db_todo


@router.delete(
    "/todos/{todo_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None
)
def delete_todo(todo_id: int, db: Session = Depends(get_db)):
    """Delete a todo by ID"""
    success = todo_crud.delete_todo(db, todo_id=todo_id)
    if not success:
        raise HTTPException(status_code=404, detail="Todo not found")
    return None