""""
ModBus configuration file reader routines
Copyright (C) 2023-2025 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 config_reader:

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

    def read_settings(self):

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

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

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

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


        return 1

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

    # Test if all settings are pressent
    def test_global_settings(self):
        # Test is all expected settings are present
        try:
            tmp = self.config_file_settings['global']['program-log']
            tmp = self.config_file_settings['global']['mqtt-server']
            tmp = self.config_file_settings['global']['mqtt-port']
        except:
            print ("Error in the global section of the configuration file.")
            return 0
        else:
            return 1

    def test_aprs_settings(self):
        for entry in self.config_file_settings['aprs']:
            try:
                tmp = entry['port']
                tmp = entry['from_call']
                tmp = entry['to_call']
                tmp = entry['destination']
                tmp = entry['digipath']
                tmp = entry['interval']
            except:
                print ("Error in the aprs section of the configuration file.")
                return 0
        else:
            return 1

    def test_mqtt_settings(self):
        # Test is all expected settings are present
        try:
            tmp = self.config_file_settings['mqtt']['subscribe']
        except:
            print ("Error in the mqtt section of the configuration file.")
            return 0
        else:
            return 1