from os import getenv
from changedetectionio.notification import (
    default_notification_body,
    default_notification_format,
    default_notification_title,
)

_FILTER_FAILURE_THRESHOLD_ATTEMPTS_DEFAULT = 6
DEFAULT_SETTINGS_HEADERS_USERAGENT='Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36'

class model(dict):
    base_config = {
            'note': "Hello! If you change this file manually, please be sure to restart your changedetection.io instance!",
            'watching': {},
            'settings': {
                'headers': {
                },
                'requests': {
                    'extra_proxies': [], # Configurable extra proxies via the UI
                    'extra_browsers': [],  # Configurable extra proxies via the UI
                    'jitter_seconds': 0,
                    'proxy': None, # Preferred proxy connection
                    'time_between_check': {'weeks': None, 'days': None, 'hours': 3, 'minutes': None, 'seconds': None},
                    'timeout': int(getenv("DEFAULT_SETTINGS_REQUESTS_TIMEOUT", "45")),  # Default 45 seconds
                    'workers': int(getenv("DEFAULT_SETTINGS_REQUESTS_WORKERS", "10")),  # Number of threads, lower is better for slow connections
                    'default_ua': {
                        'html_requests': getenv("DEFAULT_SETTINGS_HEADERS_USERAGENT", DEFAULT_SETTINGS_HEADERS_USERAGENT),
                        'html_webdriver': None,
                    }
                },
                'application': {
                    # Custom notification content
                    'api_access_token_enabled': True,
                    'base_url' : None,
                    'empty_pages_are_a_change': False,
                    'extract_title_as_title': False,
                    'fetch_backend': getenv("DEFAULT_FETCH_BACKEND", "html_requests"),
                    'filter_failure_notification_threshold_attempts': _FILTER_FAILURE_THRESHOLD_ATTEMPTS_DEFAULT,
                    'global_ignore_text': [], # List of text to ignore when calculating the comparison checksum
                    'global_subtractive_selectors': [],
                    'ignore_whitespace': True,
                    'notification_body': default_notification_body,
                    'notification_format': default_notification_format,
                    'notification_title': default_notification_title,
                    'notification_urls': [], # Apprise URL list
                    'pager_size': 50,
                    'password': False,
                    'render_anchor_tag_content': False,
                    'schema_version' : 0,
                    'shared_diff_access': False,
                    'webdriver_delay': None , # Extra delay in seconds before extracting text
                    'tags': {} #@todo use Tag.model initialisers
                }
            }
        }

    def __init__(self, *arg, **kw):
        super(model, self).__init__(*arg, **kw)
        self.update(self.base_config)


def parse_headers_from_text_file(filepath):
    headers = {}
    with open(filepath, 'r') as f:
        for l in f.readlines():
            l = l.strip()
            if not l.startswith('#') and ':' in l:
                (k, v) = l.split(':')
                headers[k.strip()] = v.strip()

    return headers