# 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.

# To use this plugin, sign up with Hampager (you need to be a licensed
# ham radio operator
#  http://www.hampager.de/
#
# You're done at this point, you only need to know your user/pass that
# you signed up with.

#  The following URLs would be accepted by Apprise:
#   - dapnet://{user}:{password}@{callsign}
#   - dapnet://{user}:{password}@{callsign1}/{callsign2}

# Optional parameters:
#   - priority (NORMAL or EMERGENCY). Default: NORMAL
#   - txgroups --> comma-separated list of DAPNET transmitter
#                           groups. Default: 'dl-all'
#                           https://hampager.de/#/transmitters/groups

from json import dumps

# The API reference used to build this plugin was documented here:
#  https://hampager.de/dokuwiki/doku.php#dapnet_api
#
import requests
from requests.auth import HTTPBasicAuth

from ..common import NotifyType
from ..locale import gettext_lazy as _
from ..url import PrivacyMode
from ..utils.parse import is_call_sign, parse_bool, parse_call_sign, parse_list
from .base import NotifyBase


class DapnetPriority:
    NORMAL = 0
    EMERGENCY = 1


DAPNET_PRIORITIES = {
    DapnetPriority.NORMAL: "normal",
    DapnetPriority.EMERGENCY: "emergency",
}


DAPNET_PRIORITY_MAP = {
    # Maps against string 'normal'
    "n": DapnetPriority.NORMAL,
    # Maps against string 'emergency'
    "e": DapnetPriority.EMERGENCY,
    # Entries to additionally support (so more like Dapnet's API)
    "0": DapnetPriority.NORMAL,
    "1": DapnetPriority.EMERGENCY,
}


class NotifyDapnet(NotifyBase):
    """A wrapper for DAPNET / Hampager Notifications."""

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

    # The services URL
    service_url = "https://hampager.de/"

    # The default secure protocol
    secure_protocol = "dapnet"

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

    # Dapnet uses the http protocol with JSON requests
    notify_url = "http://www.hampager.de:8080/calls"

    # The maximum length of the body
    body_maxlen = 80

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

    # The maximum amount of emails that can reside within a single transmission
    default_batch_size = 50

    # Define object templates
    templates = ("{schema}://{user}:{password}@{targets}",)

    # Define our template tokens
    template_tokens = dict(
        NotifyBase.template_tokens,
        **{
            "user": {
                "name": _("User Name"),
                "type": "string",
                "required": True,
            },
            "password": {
                "name": _("Password"),
                "type": "string",
                "private": True,
                "required": True,
            },
            "target_callsign": {
                "name": _("Target Callsign"),
                "type": "string",
                "regex": (
                    r"^[a-z0-9]{2,5}(-[a-z0-9]{1,2})?$",
                    "i",
                ),
                "map_to": "targets",
            },
            "targets": {
                "name": _("Targets"),
                "type": "list:string",
                "required": True,
            },
        },
    )

    # Define our template arguments
    template_args = dict(
        NotifyBase.template_args,
        **{
            "priority": {
                "name": _("Priority"),
                "type": "choice:int",
                "values": DAPNET_PRIORITIES,
                "default": DapnetPriority.NORMAL,
            },
            "txgroups": {
                "name": _("Transmitter Groups"),
                "type": "string",
                "default": "dl-all",
                "private": True,
            },
            "to": {
                "name": _("Target Callsign"),
                "type": "string",
                "map_to": "targets",
            },
            "batch": {
                "name": _("Batch Mode"),
                "type": "bool",
                "default": False,
            },
        },
    )

    def __init__(
        self, targets=None, priority=None, txgroups=None, batch=False, **kwargs
    ):
        """Initialize Dapnet Object."""
        super().__init__(**kwargs)

        # Parse our targets
        self.targets = []

        # The Priority of the message
        self.priority = int(
            NotifyDapnet.template_args["priority"]["default"]
            if priority is None
            else next(
                (
                    v
                    for k, v in DAPNET_PRIORITY_MAP.items()
                    if str(priority).lower().startswith(k)
                ),
                NotifyDapnet.template_args["priority"]["default"],
            )
        )

        if not (self.user and self.password):
            msg = "A Dapnet user/pass was not provided."
            self.logger.warning(msg)
            raise TypeError(msg)

        # Get the transmitter group
        self.txgroups = parse_list(
            txgroups
            if txgroups
            else NotifyDapnet.template_args["txgroups"]["default"]
        )

        # Prepare Batch Mode Flag
        self.batch = batch

        for target in parse_call_sign(targets):
            # Validate targets and drop bad ones:
            result = is_call_sign(target)
            if not result:
                self.logger.warning(
                    f"Dropping invalid Amateur radio call sign ({target}).",
                )
                continue

            # Store callsign without SSID and ignore duplicates
            if result["callsign"] not in self.targets:
                self.targets.append(result["callsign"])

        return

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

        if not self.targets:
            # There is no one to email; we're done
            self.logger.warning(
                "There are no Amateur radio callsigns to notify"
            )
            return False

        # Send in batches if identified to do so
        batch_size = 1 if not self.batch else self.default_batch_size

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

        # error tracking (used for function return)
        has_error = False

        # Create a copy of the targets list
        targets = list(self.targets)

        for index in range(0, len(targets), batch_size):

            # prepare JSON payload
            payload = {
                "text": body,
                "callSignNames": targets[index : index + batch_size],
                "transmitterGroupNames": self.txgroups,
                "emergency": self.priority == DapnetPriority.EMERGENCY,
            }

            self.logger.debug(f"DAPNET POST URL: {self.notify_url}")
            self.logger.debug(f"DAPNET Payload: {dumps(payload)}")

            # Always call throttle before any remote server i/o is made
            self.throttle()
            try:
                r = requests.post(
                    self.notify_url,
                    data=dumps(payload),
                    headers=headers,
                    auth=HTTPBasicAuth(
                        username=self.user, password=self.password
                    ),
                    verify=self.verify_certificate,
                    timeout=self.request_timeout,
                )
                if r.status_code != requests.codes.created:
                    # We had a problem

                    self.logger.warning(
                        "Failed to send DAPNET notification {} to {}: "
                        "error={}.".format(
                            payload["text"],
                            f" to {self.targets}",
                            r.status_code,
                        )
                    )

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

                    # Mark our failure
                    has_error = True

                else:
                    self.logger.info(
                        "Sent '{}' DAPNET notification {}".format(
                            payload["text"], f"to {self.targets}"
                        )
                    )

            except requests.RequestException as e:
                self.logger.warning(
                    "A Connection error occurred sending DAPNET "
                    f"notification to {self.targets}"
                )
                self.logger.debug(f"Socket Exception: {e!s}")

                # Mark our failure
                has_error = True

        return not has_error

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

        # Define any URL parameters
        params = {
            "priority": (
                DAPNET_PRIORITIES[self.template_args["priority"]["default"]]
                if self.priority not in DAPNET_PRIORITIES
                else DAPNET_PRIORITIES[self.priority]
            ),
            "batch": "yes" if self.batch else "no",
            "txgroups": ",".join(self.txgroups),
        }

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

        # Setup Authentication
        auth = "{user}:{password}@".format(
            user=NotifyDapnet.quote(self.user, safe=""),
            password=self.pprint(
                self.password, privacy, mode=PrivacyMode.Secret, safe=""
            ),
        )

        return "{schema}://{auth}{targets}?{params}".format(
            schema=self.secure_protocol,
            auth=auth,
            targets="/".join(
                [self.pprint(x, privacy, safe="") for x in self.targets]
            ),
            params=NotifyDapnet.urlencode(params),
        )

    @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.user, self.password)

    def __len__(self):
        """Returns the number of targets associated with this notification."""
        #
        # Factor batch into calculation
        #
        batch_size = 1 if not self.batch else self.default_batch_size
        targets = len(self.targets)
        if batch_size > 1:
            targets = int(targets / batch_size) + (
                1 if targets % batch_size else 0
            )

        return targets

    @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

        # All elements are targets
        results["targets"] = [NotifyDapnet.unquote(results["host"])]

        # All entries after the hostname are additional targets
        results["targets"].extend(NotifyDapnet.split_path(results["fullpath"]))

        # Support the 'to' variable so that we can support rooms this way too
        # The 'to' makes it easier to use yaml configuration
        if "to" in results["qsd"] and len(results["qsd"]["to"]):
            results["targets"] += NotifyDapnet.parse_list(results["qsd"]["to"])

        # Set our priority
        if "priority" in results["qsd"] and len(results["qsd"]["priority"]):
            results["priority"] = NotifyDapnet.unquote(
                results["qsd"]["priority"]
            )

        # Check for one or multiple transmitter groups (comma separated)
        # and split them up, when necessary
        if "txgroups" in results["qsd"]:
            results["txgroups"] = [
                x.lower()
                for x in NotifyDapnet.parse_list(results["qsd"]["txgroups"])
            ]

        # Get Batch Mode Flag
        results["batch"] = parse_bool(
            results["qsd"].get(
                "batch", NotifyDapnet.template_args["batch"]["default"]
            )
        )

        return results
