"""This module provides the RP To-Do model-controller."""

from pathlib import Path

from typing import Any, Dict, List, NamedTuple

from rptodo import DB_READ_ERROR, ID_ERROR

from rptodo.database import DatabaseHandler

class CurrentTodo(NamedTuple):

todo: Dict[str, Any]

error: int

class Todoer:

def __init__(self, db_path: Path) -> None:

self._db_handler = DatabaseHandler(db_path)

def add(self, description: List[str], priority: int = 2) -> CurrentTodo:

"""Add a new to-do to the database."""

description_text = " ".join(description)

if not description_text.endswith("."):

description_text += "."

todo = {

"Description": description_text,

"Priority": priority,

"Done": False,

}

read = self._db_handler.read_todos()

if read.error == DB_READ_ERROR:

return CurrentTodo(todo, read.error)

read.todo_list.append(todo)

write = self._db_handler.write_todos(read.todo_list)

return CurrentTodo(todo, write.error)

def get_todo_list(self) -> List[Dict[str, Any]]:

"""Return the current to-do list."""

read = self._db_handler.read_todos()

return read.todo_list

def set_done(self, todo_id: int) -> CurrentTodo:

"""Set a to-do as done."""

read = self._db_handler.read_todos()

if read.error:

return CurrentTodo({}, read.error)

try:

todo = read.todo_list[todo_id - 1]

except IndexError:

return CurrentTodo({}, ID_ERROR)

todo["Done"] = True

write = self._db_handler.write_todos(read.todo_list)

return CurrentTodo(todo, write.error)

def remove(self, todo_id: int) -> CurrentTodo:

"""Remove a to-do from the database using its id or index."""

read = self._db_handler.read_todos()

if read.error:

return CurrentTodo({}, read.error)

try:

todo = read.todo_list.pop(todo_id - 1)

except IndexError:

return CurrentTodo({}, ID_ERROR)

write = self._db_handler.write_todos(read.todo_list)

return CurrentTodo(todo, write.error)

def remove_all(self) -> CurrentTodo:

"""Remove all to-dos from the database."""

write = self._db_handler.write_todos([])

return CurrentTodo({}, write.error)