#!/usr/bin/python3
# -*- coding: utf-8 -*-
# key-mapper - GUI for device specific keyboard mappings
# Copyright (C) 2020 sezanzeb <proxima@hip70890b.de>
#
# This file is part of key-mapper.
#
# key-mapper is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# key-mapper is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with key-mapper.  If not, see <https://www.gnu.org/licenses/>.


"""Helperfunctions to find device ids, names, and to load configs."""


import os
import subprocess

from keymapper.logger import logger
from keymapper.config import get_config, get_config_path


def get_xinput_list(type):
    """Run xinput and get the result as list.

    Parameters
    ----------
    type : string
        Ine of 'id' or 'name'
    """
    output = subprocess.check_output(['xinput', 'list', f'--{type}-only'])
    return [line for line in output.decode().split('\n') if line != '']


def get_presets(device):
    """Get all configured presets for the device, sorted by modification date.

    Parameters
    ----------
    device : string
    """
    device_folder = get_config_path(device)
    logger.debug('Listing presets in %s', device_folder)
    if not os.path.exists(device_folder):
        os.makedirs(get_config_path(device_folder))
    return os.listdir(get_config_path(device_folder))


def create_preset(device, name=None):
    """Create an empty preset."""
    existing_names = get_presets(device)
    if name is None:
        name = 'new preset'

    # find a name that is not already taken
    i = 1
    while name in existing_names:
        i += 1
        name = f'new preset {i}'

    # trigger the creation of a new config file:
    get_config(device, name)
    return name


def get_mappings(device, preset):
    """Get all configured buttons of the preset.

    Parameters
    ----------
    device : string
    preset : string
    """
    pass


def find_newest_preset():
    """Get the device and present that was most recently modified."""
    print('find_newest_preset not yet implemented')
    return None, None