# BSD 2-Clause License
#
# Apprise - Push Notification Library.
# Copyright (c) 2026, 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.

# For this to work correctly you need to create a webhook. You'll also
# need a GSuite account (there are free trials if you don't have one)
#
#  - Open Google Chat in your browser:
#     Link: https://chat.google.com/
#  - Go to the room to which you want to add a bot.
#  - From the room menu at the top of the page, select Manage webhooks.
#  - Provide it a name and optional avatar and click SAVE
#  - Copy the URL listed next to your new webhook in the Webhook URL column.
#  - Click outside the dialog box to close.
#
# When you've completed, you'll get a URL that looks a little like this:
#  https://chat.googleapis.com/v1/spaces/AAAAk6lGXyM/\
#       messages?key=AIzaSyDdI0hCZtE6vySjMm-WEfRq3CPzqKqqsHI&\
#       token=O7b1nyri_waOpLMSzbFILAGRzgtQofPW71fEEXKcyFk%3D
#
# Simplified, it looks like this:
#     https://chat.googleapis.com/v1/spaces/WORKSPACE/messages?\
#       key=WEBHOOK_KEY&token=WEBHOOK_TOKEN
#
# This plugin will simply work using the url of:
#     gchat://WORKSPACE/WEBHOOK_KEY/WEBHOOK_TOKEN
#
# API Documentation on Webhooks:
#    - https://developers.google.com/hangouts/chat/quickstart/\
#         incoming-bot-python
#    - https://developers.google.com/hangouts/chat/reference/rest
#
from json import dumps
import re

import requests

from ..common import NotifyFormat, NotifyType
from ..locale import gettext_lazy as _
from ..utils.parse import validate_regex
from .base import NotifyBase


class NotifyGoogleChat(NotifyBase):
    """A wrapper to Google Chat Notifications."""

    # The default descriptive name associated with the Notification
    service_name = "Google Chat"

    # The services URL
    service_url = "https://chat.google.com/"

    # The default secure protocol
    secure_protocol = "gchat"

    # A URL that takes you to the setup/help of the specific protocol
    setup_url = "https://appriseit.com/services/googlechat/"

    # Google Chat Webhook
    notify_url = "https://chat.googleapis.com/v1/spaces/{workspace}/messages"

    # Default Notify Format
    notify_format = NotifyFormat.MARKDOWN

    # A title can not be used for Google Chat Messages.  Setting this to zero
    # will cause any title (if defined) to get placed into the message body.
    title_maxlen = 0

    # The maximum allowable characters allowed in the body per message
    body_maxlen = 4000

    # Define object templates
    templates = (
        "{schema}://{workspace}/{webhook_key}/{webhook_token}",
        "{schema}://{workspace}/{webhook_key}/{webhook_token}/{thread_key}",
    )

    # Define our template tokens
    template_tokens = dict(
        NotifyBase.template_tokens,
        **{
            "workspace": {
                "name": _("Workspace"),
                "type": "string",
                "private": True,
                "required": True,
            },
            "webhook_key": {
                "name": _("Webhook Key"),
                "type": "string",
                "private": True,
                "required": True,
            },
            "webhook_token": {
                "name": _("Webhook Token"),
                "type": "string",
                "private": True,
                "required": True,
            },
            "thread_key": {
                "name": _("Thread Key"),
                "type": "string",
                "private": True,
            },
        },
    )

    # Define our template arguments
    template_args = dict(
        NotifyBase.template_args,
        **{
            "workspace": {
                "alias_of": "workspace",
            },
            "key": {
                "alias_of": "webhook_key",
            },
            "token": {
                "alias_of": "webhook_token",
            },
            "thread": {
                "alias_of": "thread_key",
            },
        },
    )

    def __init__(
        self, workspace, webhook_key, webhook_token, thread_key=None, **kwargs
    ):
        """Initialize Google Chat Object."""
        super().__init__(**kwargs)

        # Workspace (associated with project)
        self.workspace = validate_regex(workspace)
        if not self.workspace:
            msg = (
                "An invalid Google Chat Workspace "
                f"({workspace}) was specified."
            )
            self.logger.warning(msg)
            raise TypeError(msg)

        # Webhook Key (associated with project)
        self.webhook_key = validate_regex(webhook_key)
        if not self.webhook_key:
            msg = (
                "An invalid Google Chat Webhook Key "
                f"({webhook_key}) was specified."
            )
            self.logger.warning(msg)
            raise TypeError(msg)

        # Webhook Token (associated with project)
        self.webhook_token = validate_regex(webhook_token)
        if not self.webhook_token:
            msg = (
                "An invalid Google Chat Webhook Token "
                f"({webhook_token}) was specified."
            )
            self.logger.warning(msg)
            raise TypeError(msg)

        if thread_key:
            self.thread_key = validate_regex(thread_key)
            if not self.thread_key:
                msg = (
                    "An invalid Google Chat Thread Key "
                    f"({thread_key}) was specified."
                )
                self.logger.warning(msg)
                raise TypeError(msg)
        else:
            self.thread_key = None

        return

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

        # Our headers
        headers = {
            "User-Agent": self.app_id,
            "Content-Type": "application/json; charset=utf-8",
        }

        payload = {
            # Our Message
            "text": body,
        }

        # Construct Notify URL
        notify_url = self.notify_url.format(
            workspace=self.workspace,
        )

        params = {
            # Prepare our URL Parameters
            "token": self.webhook_token,
            "key": self.webhook_key,
        }

        if self.thread_key:
            params.update({
                "messageReplyOption": "REPLY_MESSAGE_FALLBACK_TO_NEW_THREAD",
            })

            payload.update({
                "thread": {
                    "thread_key": self.thread_key,
                }
            })

        self.logger.debug(
            "Google Chat POST URL:"
            f" {notify_url} (cert_verify={self.verify_certificate!r})"
        )
        self.logger.debug(f"Google Chat Parameters: {params!s}")
        self.logger.debug(f"Google Chat Payload: {payload!s}")

        # Always call throttle before any remote server i/o is made
        self.throttle()
        try:
            r = requests.post(
                notify_url,
                params=params,
                data=dumps(payload),
                headers=headers,
                verify=self.verify_certificate,
                timeout=self.request_timeout,
            )
            if r.status_code not in (
                requests.codes.ok,
                requests.codes.no_content,
            ):

                # We had a problem
                status_str = NotifyBase.http_response_code_lookup(
                    r.status_code
                )

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

                self.logger.debug(
                    "Response Details:\r\n%r", (r.content or b"")[:2000])

                # Return; we're done
                return False

            else:
                self.logger.info("Sent Google Chat notification.")

        except requests.RequestException as e:
            self.logger.warning(
                "A Connection error occurred postingto Google Chat."
            )
            self.logger.debug(f"Socket Exception: {e!s}")
            return False

        return True

    @property
    def url_identifier(self):
        """Returns all of the identifiers that make this URL unique from
        another simliar one.

        Targets or end points should never be identified here.
        """
        return (
            self.secure_protocol,
            self.workspace,
            self.webhook_key,
            self.webhook_token,
        )

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

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

        return "{schema}://{workspace}/{key}/{token}/{thread}?{params}".format(
            schema=self.secure_protocol,
            workspace=self.pprint(self.workspace, privacy, safe=""),
            key=self.pprint(self.webhook_key, privacy, safe=""),
            token=self.pprint(self.webhook_token, privacy, safe=""),
            thread=(
                ""
                if not self.thread_key
                else self.pprint(self.thread_key, privacy, safe="")
            ),
            params=NotifyGoogleChat.urlencode(params),
        )

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

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

        # Store our Workspace
        results["workspace"] = NotifyGoogleChat.unquote(results["host"])

        # Acquire our tokens
        tokens = NotifyGoogleChat.split_path(results["fullpath"])

        # Store our Webhook Key
        results["webhook_key"] = tokens.pop(0) if tokens else None

        # Store our Webhook Token
        results["webhook_token"] = tokens.pop(0) if tokens else None

        # Store our Thread Key
        results["thread_key"] = tokens.pop(0) if tokens else None

        # Support arguments as overrides (if specified)
        if "workspace" in results["qsd"]:
            results["workspace"] = NotifyGoogleChat.unquote(
                results["qsd"]["workspace"]
            )

        if "key" in results["qsd"]:
            results["webhook_key"] = NotifyGoogleChat.unquote(
                results["qsd"]["key"]
            )

        if "token" in results["qsd"]:
            results["webhook_token"] = NotifyGoogleChat.unquote(
                results["qsd"]["token"]
            )

        if "thread" in results["qsd"]:
            results["thread_key"] = NotifyGoogleChat.unquote(
                results["qsd"]["thread"]
            )

        elif "threadkey" in results["qsd"]:
            # Support Google Chat's Thread Key (if set)
            # keys are always made lowercase; so check above is attually
            # testing threadKey successfully as well
            results["thread_key"] = NotifyGoogleChat.unquote(
                results["qsd"]["threadkey"]
            )

        return results

    @staticmethod
    def parse_native_url(url):
        """
        Support
           https://chat.googleapis.com/v1/spaces/{workspace}/messages
                 '?key={key}&token={token}
           https://chat.googleapis.com/v1/spaces/{workspace}/messages
                 '?key={key}&token={token}&threadKey={thread}
        """

        result = re.match(
            r"^https://chat\.googleapis\.com/v1/spaces/"
            r"(?P<workspace>[A-Z0-9_-]+)/messages/*(?P<params>.+)$",
            url,
            re.I,
        )

        if result:
            return NotifyGoogleChat.parse_url(
                "{schema}://{workspace}/{params}".format(
                    schema=NotifyGoogleChat.secure_protocol,
                    workspace=result.group("workspace"),
                    params=result.group("params"),
                )
            )

        return None
