""""
ModBus definition file reader routines
Copyright (C) 2025 M.T. Konstapel

This program 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.

This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
"""
import yaml
from yaml.loader import SafeLoader

class definition_file_reader:

    # initiate class: define name configuration files
    def __init__(self, definition_file):
        self.definition_file = definition_file

    def read_settings(self):

        if self.read_definition_file() == 0:
            return 0

        if self.test_definition_file() == 0:
            return 0

        return 1

    def read_definition_file (self):
        try:
            with open(self.definition_file) as f:
                self.definition_file_data = yaml.load(f, Loader=SafeLoader)
        except:
            print ("Definition file ./" + self.definition_file + " not found or syntax error in file.")
            return 0
        else:
            return 1

    # Test if all settings are pressent
    def test_definition_file(self):
        # Test is all expected settings are present
        try:
            tmp = self.definition_file_data['devices']
        except:
            print ("Error in the ModBus definition file.")
            return 0
        else:
            return 1