# Copyright © 2022 Aravinth Manivannan <realaravinth@batsense.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
from enum import Enum, unique

from .entity import User, Repo, Org


@unique
class MessageCode(Enum):
    """
    Message code associated with alerts. All alert messages should contain
    a message code
    """

    USER_NO_PURCHASE_FORK_HISTORY = "The fork history doesn't contain a paying customer"
    USER_NO_PURCHASE_NON_FORK_REPO = "Gratis customer has a non-fork repository"
    ORG_MAJORITY_NO_PURCHASE = (
        "Majority of the members of an organisation are non-paying customers"
    )

    def __str__(self) -> str:
        return self.name


class Message:
    """
    An alert message
    """

    def __init__(
        self,
        code: MessageCode,
        customer: User = None,
        repo: Repo = None,
        forks: [Repo] = None,
        org: Org = None,
    ):
        self.code = code
        self.repo = repo
        self.org = org
        self.customer = customer
        self.forks = forks

    def __str__(self) -> str:
        if self.code == MessageCode.USER_NO_PURCHASE_NON_FORK_REPO:
            return f"{self.customer} is not a paying customer; non-fork repository: {self.repo}"

        if self.code == MessageCode.USER_NO_PURCHASE_FORK_HISTORY:
            return f"forks found without a paying customer at origin: {self.forks}"

        if self.code == MessageCode.ORG_MAJORITY_NO_PURCHASE:
            return f"org with more non-paying members than paying members: {self.org}"

        raise Exception(f"Unknown message code {self.code}")

    def __repr__(self) -> str:
        return f"[{self.code}] {self}"


class Alert:
    """
    Send Alert
    """

    def alert(self, msg: Message):
        """
        Ping admin: user|repository is over gratis quota
        """
        print(msg)