# -*- coding: utf-8 -*-
#
# Copyright (C) 2019 Chris Caron <lead2gold@gmail.com>
# All rights reserved.
#
# This code is licensed under the MIT License.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files(the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions :
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CON

# 1. Simply visit https://notica.us
# 2. You'll be provided a new variation of the website which will look
#    something like: https://notica.us/?abc123.
#                                         ^
#                                         |
#                                       token
#
#    Your token is actually abc123 (do not include/grab the question mark)
#    You can use that URL as is directly in Apprise, or you can follow
#    the next step which shows you how to assemble the Apprise URL:
#
# 3. With respect to the above, your apprise URL would be:
#       notica://abc123
#
import re
import requests

from .NotifyBase import NotifyBase
from ..URLBase import PrivacyMode
from ..common import NotifyType
from ..utils import validate_regex
from ..AppriseLocale import gettext_lazy as _


class NoticaMode:
    """
    Tracks if we're accessing the notica upstream server or a locally hosted
    one.
    """
    # We're dealing with a self hosted service
    SELFHOSTED = 'selfhosted'

    # We're dealing with the official hosted service at https://notica.us
    OFFICIAL = 'official'


# Define our Notica Modes
NOTICA_MODES = (
    NoticaMode.SELFHOSTED,
    NoticaMode.OFFICIAL,
)


class NotifyNotica(NotifyBase):
    """
    A wrapper for Notica Notifications
    """

    # The default descriptive name associated with the Notification
    service_name = 'Notica'

    # The services URL
    service_url = 'https://notica.us/'

    # Insecure protocol (for those self hosted requests)
    protocol = 'notica'

    # The default protocol (this is secure for notica)
    secure_protocol = 'noticas'

    # A URL that takes you to the setup/help of the specific protocol
    setup_url = 'https://github.com/caronc/apprise/wiki/Notify_notica'

    # Notica URL
    notify_url = 'https://notica.us/?{token}'

    # Notica does not support a title
    title_maxlen = 0

    # Define object templates
    templates = (
        '{schema}://{token}',

        # Self-hosted notica servers
        '{schema}://{host}/{token}',
        '{schema}://{host}:{port}/{token}',
        '{schema}://{user}@{host}/{token}',
        '{schema}://{user}@{host}:{port}/{token}',
        '{schema}://{user}:{password}@{host}/{token}',
        '{schema}://{user}:{password}@{host}:{port}/{token}',

        # Self-hosted notica servers (with custom path)
        '{schema}://{host}{path}{token}',
        '{schema}://{host}:{port}{path}{token}',
        '{schema}://{user}@{host}{path}{token}',
        '{schema}://{user}@{host}:{port}{path}{token}',
        '{schema}://{user}:{password}@{host}{path}{token}',
        '{schema}://{user}:{password}@{host}:{port}{path}{token}',
    )

    # Define our template tokens
    template_tokens = dict(NotifyBase.template_tokens, **{
        'token': {
            'name': _('Token'),
            'type': 'string',
            'private': True,
            'required': True,
            'regex': r'^\?*(?P<token>[^/]+)\s*$'
        },
        'host': {
            'name': _('Hostname'),
            'type': 'string',
        },
        'port': {
            'name': _('Port'),
            'type': 'int',
            'min': 1,
            'max': 65535,
        },
        'user': {
            'name': _('Username'),
            'type': 'string',
        },
        'password': {
            'name': _('Password'),
            'type': 'string',
            'private': True,
        },
        'path': {
            'name': _('Path'),
            'type': 'string',
            'map_to': 'fullpath',
            'default': '/',
        },
    })

    # Define any kwargs we're using
    template_kwargs = {
        'headers': {
            'name': _('HTTP Header'),
            'prefix': '+',
        },
    }

    def __init__(self, token, headers=None, **kwargs):
        """
        Initialize Notica Object
        """
        super().__init__(**kwargs)

        # Token (associated with project)
        self.token = validate_regex(token)
        if not self.token:
            msg = 'An invalid Notica Token ' \
                  '({}) was specified.'.format(token)
            self.logger.warning(msg)
            raise TypeError(msg)

        # Setup our mode
        self.mode = NoticaMode.SELFHOSTED if self.host else NoticaMode.OFFICIAL

        # prepare our fullpath
        self.fullpath = kwargs.get('fullpath')
        if not isinstance(self.fullpath, str):
            self.fullpath = '/'

        self.headers = {}
        if headers:
            # Store our extra headers
            self.headers.update(headers)

        return

    def send(self, body, title='', notify_type=NotifyType.INFO, **kwargs):
        """
        Perform Notica Notification
        """

        headers = {
            'User-Agent': self.app_id,
            'Content-Type': 'application/x-www-form-urlencoded'
        }

        # Prepare our payload
        payload = 'd:{}'.format(body)

        # Auth is used for SELFHOSTED queries
        auth = None

        if self.mode is NoticaMode.OFFICIAL:
            # prepare our notify url
            notify_url = self.notify_url.format(token=self.token)

        else:
            # Prepare our self hosted URL

            # Apply any/all header over-rides defined
            headers.update(self.headers)

            if self.user:
                auth = (self.user, self.password)

            # Set our schema
            schema = 'https' if self.secure else 'http'

            # Prepare our notify_url
            notify_url = '%s://%s' % (schema, self.host)
            if isinstance(self.port, int):
                notify_url += ':%d' % self.port

            notify_url += '{fullpath}?token={token}'.format(
                fullpath=self.fullpath,
                token=self.token)

        self.logger.debug('Notica POST URL: %s (cert_verify=%r)' % (
            notify_url, self.verify_certificate,
        ))
        self.logger.debug('Notica Payload: %s' % str(payload))

        # Always call throttle before any remote server i/o is made
        self.throttle()

        try:
            r = requests.post(
                notify_url.format(token=self.token),
                data=payload,
                headers=headers,
                auth=auth,
                verify=self.verify_certificate,
                timeout=self.request_timeout,
            )
            if r.status_code != requests.codes.ok:
                # We had a problem
                status_str = \
                    NotifyNotica.http_response_code_lookup(r.status_code)

                self.logger.warning(
                    'Failed to send Notica notification:'
                    '{}{}error={}.'.format(
                        status_str,
                        ', ' if status_str else '',
                        r.status_code))

                self.logger.debug('Response Details:\r\n{}'.format(r.content))

                # Return; we're done
                return False

            else:
                self.logger.info('Sent Notica notification.')

        except requests.RequestException as e:
            self.logger.warning(
                'A Connection error occurred sending Notica notification.',
            )
            self.logger.debug('Socket Exception: %s' % str(e))

            # Return; we're done
            return False

        return True

    def url(self, privacy=False, *args, **kwargs):
        """
        Returns the URL built dynamically based on specified arguments.
        """

        # Our URL parameters
        params = self.url_parameters(privacy=privacy, *args, **kwargs)

        if self.mode == NoticaMode.OFFICIAL:
            # Official URLs are easy to assemble
            return '{schema}://{token}/?{params}'.format(
                schema=self.protocol,
                token=self.pprint(self.token, privacy, safe=''),
                params=NotifyNotica.urlencode(params),
            )

        # If we reach here then we are assembling a self hosted URL

        # Append URL parameters from our headers
        params.update({'+{}'.format(k): v for k, v in self.headers.items()})

        # Authorization can be used for self-hosted sollutions
        auth = ''

        # Determine Authentication
        if self.user and self.password:
            auth = '{user}:{password}@'.format(
                user=NotifyNotica.quote(self.user, safe=''),
                password=self.pprint(
                    self.password, privacy, mode=PrivacyMode.Secret, safe=''),
            )
        elif self.user:
            auth = '{user}@'.format(
                user=NotifyNotica.quote(self.user, safe=''),
            )

        default_port = 443 if self.secure else 80

        return '{schema}://{auth}{hostname}{port}{fullpath}{token}/?{params}' \
               .format(
                   schema=self.secure_protocol
                   if self.secure else self.protocol,
                   auth=auth,
                   hostname=NotifyNotica.quote(self.host, safe=''),
                   port='' if self.port is None or self.port == default_port
                        else ':{}'.format(self.port),
                   fullpath=NotifyNotica.quote(
                       self.fullpath, safe='/'),
                   token=self.pprint(self.token, privacy, safe=''),
                   params=NotifyNotica.urlencode(params),
               )

    @staticmethod
    def parse_url(url):
        """
        Parses the URL and returns enough arguments that can allow
        us to re-instantiate this object.

        """
        results = NotifyBase.parse_url(url, verify_host=False)
        if not results:
            # We're done early as we couldn't load the results
            return results

        # Get unquoted entries
        entries = NotifyNotica.split_path(results['fullpath'])
        if not entries:
            # If there are no path entries, then we're only dealing with the
            # official website
            results['mode'] = NoticaMode.OFFICIAL

            # Store our token using the host
            results['token'] = NotifyNotica.unquote(results['host'])

            # Unset our host
            results['host'] = None

        else:
            # Otherwise we're running a self hosted instance
            results['mode'] = NoticaMode.SELFHOSTED

            # The last element in the list is our token
            results['token'] = entries.pop()

            # Re-assemble our full path
            results['fullpath'] = \
                '/' if not entries else '/{}/'.format('/'.join(entries))

            # Add our headers that the user can potentially over-ride if they
            # wish to to our returned result set and tidy entries by unquoting
            # them
            results['headers'] = {
                NotifyNotica.unquote(x): NotifyNotica.unquote(y)
                for x, y in results['qsd+'].items()}

        return results

    @staticmethod
    def parse_native_url(url):
        """
        Support https://notica.us/?abc123
        """

        result = re.match(
            r'^https?://notica\.us/?'
            r'\??(?P<token>[^&]+)([&\s]*(?P<params>.+))?$', url, re.I)

        if result:
            return NotifyNotica.parse_url(
                '{schema}://{token}/{params}'.format(
                    schema=NotifyNotica.protocol,
                    token=result.group('token'),
                    params='' if not result.group('params')
                    else '?{}'.format(result.group('params'))))

        return None