# 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.

# New priorities are defined here:
# - https://firebase.google.com/docs/reference/fcm/rest/v1/\
#       projects.messages#NotificationPriority

# Legacy priorities are defined here:
# - https://firebase.google.com/docs/cloud-messaging/http-server-ref
from ...logger import logger
from .common import FCM_MODES, FCMMode


class NotificationPriority:
    """
    Defines the Notification Priorities as described on:
    https://firebase.google.com/docs/reference/fcm/rest/v1/\
            projects.messages#androidmessagepriority

        NORMAL:
            Default priority for data messages. Normal priority messages won't
            open network connections on a sleeping device, and their delivery
            may be delayed to conserve the battery. For less time-sensitive
            messages, such as notifications of new email or other data to sync,
            choose normal delivery priority.

        HIGH:
            Default priority for notification messages. FCM attempts to
            deliver high priority messages immediately, allowing the FCM
            service to wake a sleeping device when possible and open a network
            connection to your app server. Apps with instant messaging, chat,
            or voice call alerts, for example, generally need to open a
            network connection and make sure FCM delivers the message to the
            device without delay. Set high priority if the message is
            time-critical and requires the user's immediate interaction, but
            beware that setting your messages to high priority contributes
            more to battery drain compared with normal priority messages.
    """

    NORMAL = "NORMAL"
    HIGH = "HIGH"


class FCMPriority:
    """Defines our accepted priorites."""

    MIN = "min"

    LOW = "low"

    NORMAL = "normal"

    HIGH = "high"

    MAX = "max"


FCM_PRIORITIES = (
    FCMPriority.MIN,
    FCMPriority.LOW,
    FCMPriority.NORMAL,
    FCMPriority.HIGH,
    FCMPriority.MAX,
)


class FCMPriorityManager:
    """A Simple object to make it easier to work with FCM set priorities."""

    priority_map = {
        FCMPriority.MIN: {
            FCMMode.OAuth2: {
                "message": {
                    "android": {"priority": NotificationPriority.NORMAL},
                    "apns": {"headers": {"apns-priority": "5"}},
                    "webpush": {"headers": {"Urgency": "very-low"}},
                }
            },
            FCMMode.Legacy: {
                "priority": "normal",
            },
        },
        FCMPriority.LOW: {
            FCMMode.OAuth2: {
                "message": {
                    "android": {"priority": NotificationPriority.NORMAL},
                    "apns": {"headers": {"apns-priority": "5"}},
                    "webpush": {"headers": {"Urgency": "low"}},
                }
            },
            FCMMode.Legacy: {
                "priority": "normal",
            },
        },
        FCMPriority.NORMAL: {
            FCMMode.OAuth2: {
                "message": {
                    "android": {"priority": NotificationPriority.NORMAL},
                    "apns": {"headers": {"apns-priority": "5"}},
                    "webpush": {"headers": {"Urgency": "normal"}},
                }
            },
            FCMMode.Legacy: {
                "priority": "normal",
            },
        },
        FCMPriority.HIGH: {
            FCMMode.OAuth2: {
                "message": {
                    "android": {"priority": NotificationPriority.HIGH},
                    "apns": {
                        "headers": {
                            "apns-priority": "10",
                            "apns-push-type": "alert",
                        }
                    },
                    "webpush": {"headers": {"Urgency": "high"}},
                }
            },
            FCMMode.Legacy: {
                "priority": "high",
            },
        },
        FCMPriority.MAX: {
            FCMMode.OAuth2: {
                "message": {
                    "android": {"priority": NotificationPriority.HIGH},
                    "apns": {
                        "headers": {
                            "apns-priority": "10",
                            "apns-push-type": "alert",
                        }
                    },
                    "webpush": {"headers": {"Urgency": "high"}},
                }
            },
            FCMMode.Legacy: {
                "priority": "high",
            },
        },
    }

    def __init__(self, mode, priority=None):
        """Takes a FCMMode and Priority."""

        self.mode = mode
        if self.mode not in FCM_MODES:
            msg = f"The FCM mode specified ({mode}) is invalid."
            logger.warning(msg)
            raise TypeError(msg)

        self.priority = None
        if priority:
            self.priority = next(
                (
                    p
                    for p in FCM_PRIORITIES
                    if p.startswith(priority[:2].lower())
                ),
                None,
            )
            if not self.priority:
                msg = f"An invalid FCM Priority ({priority}) was specified."
                logger.warning(msg)
                raise TypeError(msg)

    def payload(self):
        """Returns our payload depending on our mode."""
        return (
            self.priority_map[self.priority][self.mode]
            if self.priority
            else {}
        )

    def __str__(self):
        """Our priority representation."""
        return self.priority if self.priority else ""

    def __bool__(self):
        """Allows this object to be wrapped in an 'if statement'.

        True is returned if a priority was loaded
        """
        return bool(self.priority)
