# -*- coding: utf-8 -*-
# BSD 2-Clause License
#
# Apprise - Push Notification Library.
# Copyright (c) 2023, Chris Caron <lead2gold@gmail.com>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

import requests
from json import dumps

from uuid import uuid4

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


# Actions
class PagerTreeAction:
    CREATE = 'create'
    ACKNOWLEDGE = 'acknowledge'
    RESOLVE = 'resolve'


# Urgencies
class PagerTreeUrgency:
    SILENT = "silent"
    LOW = "low"
    MEDIUM = "medium"
    HIGH = "high"
    CRITICAL = "critical"


PAGERTREE_ACTIONS = {
    PagerTreeAction.CREATE: 'create',
    PagerTreeAction.ACKNOWLEDGE: 'acknowledge',
    PagerTreeAction.RESOLVE: 'resolve',
}

PAGERTREE_URGENCIES = {
    # Note: This also acts as a reverse lookup mapping
    PagerTreeUrgency.SILENT: 'silent',
    PagerTreeUrgency.LOW: 'low',
    PagerTreeUrgency.MEDIUM: 'medium',
    PagerTreeUrgency.HIGH: 'high',
    PagerTreeUrgency.CRITICAL: 'critical',
}
# Extend HTTP Error Messages
PAGERTREE_HTTP_ERROR_MAP = {
    402: 'Payment Required - Please subscribe or upgrade',
    403: 'Forbidden - Blocked',
    404: 'Not Found - Invalid Integration ID',
    405: 'Method Not Allowed - Integration Disabled',
    429: 'Too Many Requests - Rate Limit Exceeded',
}


class NotifyPagerTree(NotifyBase):
    """
    A wrapper for PagerTree Notifications
    """

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

    # The services URL
    service_url = 'https://pagertree.com/'

    # All PagerTree requests are secure
    secure_protocol = 'pagertree'

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

    # PagerTree uses the http protocol with JSON requests
    notify_url = 'https://api.pagertree.com/integration/{}'

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

    # Define our template tokens
    template_tokens = dict(NotifyBase.template_tokens, **{
        'integration': {
            'name': _('Integration ID'),
            'type': 'string',
            'private': True,
            'required': True,
        }
    })

    # Define our template arguments
    template_args = dict(NotifyBase.template_args, **{
        'action': {
            'name': _('Action'),
            'type': 'choice:string',
            'values': PAGERTREE_ACTIONS,
            'default': PagerTreeAction.CREATE,
        },
        'thirdparty': {
            'name': _('Third Party ID'),
            'type': 'string',
        },
        'urgency': {
            'name': _('Urgency'),
            'type': 'choice:string',
            'values': PAGERTREE_URGENCIES,
        },
        'tags': {
            'name': _('Tags'),
            'type': 'string',
        },
    })

    # Define any kwargs we're using
    template_kwargs = {
        'headers': {
            'name': _('HTTP Header'),
            'prefix': '+',
        },
        'payload_extras': {
            'name': _('Payload Extras'),
            'prefix': ':',
        },
        'meta_extras': {
            'name': _('Meta Extras'),
            'prefix': '-',
        },
    }

    def __init__(self, integration, action=None, thirdparty=None,
                 urgency=None, tags=None, headers=None,
                 payload_extras=None, meta_extras=None, **kwargs):
        """
        Initialize PagerTree Object
        """
        super().__init__(**kwargs)

        # Integration ID (associated with account)
        self.integration = \
            validate_regex(integration, r'^int_[a-zA-Z0-9\-_]{7,14}$')
        if not self.integration:
            msg = 'An invalid PagerTree Integration ID ' \
                  '({}) was specified.'.format(integration)
            self.logger.warning(msg)
            raise TypeError(msg)

        # thirdparty (optional, in case they want to pass the
        # acknowledge or resolve action)
        self.thirdparty = None
        if thirdparty:
            # An id was specified, we want to validate it
            self.thirdparty = validate_regex(thirdparty)
            if not self.thirdparty:
                msg = 'An invalid PagerTree third party ID ' \
                      '({}) was specified.'.format(thirdparty)
                self.logger.warning(msg)
                raise TypeError(msg)

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

        self.payload_extras = {}
        if payload_extras:
            # Store our extra payload entries
            self.payload_extras.update(payload_extras)

        self.meta_extras = {}
        if meta_extras:
            # Store our extra payload entries
            self.meta_extras.update(meta_extras)

        # Setup our action
        self.action = NotifyPagerTree.template_args['action']['default'] \
            if action not in PAGERTREE_ACTIONS else \
            PAGERTREE_ACTIONS[action]

        # Setup our urgency
        self.urgency = \
            None if urgency not in PAGERTREE_URGENCIES else \
            PAGERTREE_URGENCIES[urgency]

        # Any optional tags to attach to the notification
        self.__tags = parse_list(tags)

        return

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

        # Prepare our headers
        headers = {
            'User-Agent': self.app_id,
            'Content-Type': 'application/json',
        }

        # Apply any/all header over-rides defined
        # For things like PagerTree Token
        headers.update(self.headers)

        # prepare JSON Object
        payload = {
            # Generate an ID (unless one was explicitly forced to be used)
            'id': self.thirdparty if self.thirdparty else str(uuid4()),
            'event_type': self.action,
        }

        if self.action == PagerTreeAction.CREATE:
            payload['title'] = title if title else self.app_desc
            payload['description'] = body

            payload['meta'] = self.meta_extras
            payload['tags'] = self.__tags

            if self.urgency is not None:
                payload['urgency'] = self.urgency

        # Apply any/all payload over-rides defined
        payload.update(self.payload_extras)

        # Prepare our URL based on integration
        notify_url = self.notify_url.format(self.integration)

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

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

        try:
            r = requests.post(
                notify_url,
                data=dumps(payload),
                headers=headers,
                verify=self.verify_certificate,
                timeout=self.request_timeout,
            )
            if r.status_code not in (
                    requests.codes.ok, requests.codes.created,
                    requests.codes.accepted):
                # We had a problem
                status_str = \
                    NotifyPagerTree.http_response_code_lookup(
                        r.status_code)

                self.logger.warning(
                    'Failed to send PagerTree 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 PagerTree notification.')

        except requests.RequestException as e:
            self.logger.warning(
                'A Connection error occurred sending PagerTree '
                'notification to %s.' % self.host)
            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.
        """

        # Define any URL parameters
        params = {
            'action': self.action,
        }

        if self.thirdparty:
            params['tid'] = self.thirdparty

        if self.urgency:
            params['urgency'] = self.urgency

        if self.__tags:
            params['tags'] = ','.join([x for x in self.__tags])

        # Extend our parameters
        params.update(self.url_parameters(privacy=privacy, *args, **kwargs))

        # Headers prefixed with a '+' sign
        # Append our headers into our parameters
        params.update({'+{}'.format(k): v for k, v in self.headers.items()})

        # Meta: {} prefixed with a '-' sign
        # Append our meta extras into our parameters
        params.update(
            {'-{}'.format(k): v for k, v in self.meta_extras.items()})

        # Payload body extras prefixed with a ':' sign
        # Append our payload extras into our parameters
        params.update(
            {':{}'.format(k): v for k, v in self.payload_extras.items()})

        return '{schema}://{integration}?{params}'.format(
            schema=self.secure_protocol,
            # never encode hostname since we're expecting it to be a valid one
            integration=self.pprint(self.integration, privacy, safe=''),
            params=NotifyPagerTree.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

        # 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'] = {
            NotifyPagerTree.unquote(x): NotifyPagerTree.unquote(y)
            for x, y in results['qsd+'].items()
        }

        # store any additional payload extra's defined
        results['payload_extras'] = {
            NotifyPagerTree.unquote(x): NotifyPagerTree.unquote(y)
            for x, y in results['qsd:'].items()
        }

        # store any additional meta extra's defined
        results['meta_extras'] = {
            NotifyPagerTree.unquote(x): NotifyPagerTree.unquote(y)
            for x, y in results['qsd-'].items()
        }

        # Integration ID
        if 'id' in results['qsd'] and len(results['qsd']['id']):
            # Shortened version of integration id
            results['integration'] = \
                NotifyPagerTree.unquote(results['qsd']['id'])

        elif 'integration' in results['qsd'] and \
                len(results['qsd']['integration']):
            results['integration'] = \
                NotifyPagerTree.unquote(results['qsd']['integration'])

        else:
            results['integration'] = \
                NotifyPagerTree.unquote(results['host'])

        # Set our thirdparty

        if 'tid' in results['qsd'] and len(results['qsd']['tid']):
            # Shortened version of thirdparty
            results['thirdparty'] = \
                NotifyPagerTree.unquote(results['qsd']['tid'])

        elif 'thirdparty' in results['qsd'] and \
                len(results['qsd']['thirdparty']):
            results['thirdparty'] = \
                NotifyPagerTree.unquote(results['qsd']['thirdparty'])

        # Set our urgency
        if 'action' in results['qsd'] and \
                len(results['qsd']['action']):
            results['action'] = \
                NotifyPagerTree.unquote(results['qsd']['action'])

        # Set our urgency
        if 'urgency' in results['qsd'] and len(results['qsd']['urgency']):
            results['urgency'] = \
                NotifyPagerTree.unquote(results['qsd']['urgency'])

        # Set our tags
        if 'tags' in results['qsd'] and len(results['qsd']['tags']):
            results['tags'] = \
                parse_list(NotifyPagerTree.unquote(results['qsd']['tags']))

        return results