# -*- coding: utf-8 -*-

# Copyright 2010 - 2017 RhodeCode GmbH and the AppEnlight project authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import uuid
import logging
import sqlalchemy as sa
from appenlight.models.resource import Resource
from sqlalchemy.orm import aliased

log = logging.getLogger(__name__)


def generate_api_key():
    uid = str(uuid.uuid4()).replace("-", "")
    return uid[0:32]


class Application(Resource):
    """
    Resource of application type
    """

    __tablename__ = "applications"
    __mapper_args__ = {"polymorphic_identity": "application"}

    # lists configurable possible permissions for this resource type
    __possible_permissions__ = ("view", "update_reports")

    resource_id = sa.Column(
        sa.Integer(),
        sa.ForeignKey("resources.resource_id", onupdate="CASCADE", ondelete="CASCADE"),
        primary_key=True,
    )
    domains = sa.Column(sa.UnicodeText(), nullable=False, default="")
    api_key = sa.Column(
        sa.String(32), nullable=False, unique=True, index=True, default=generate_api_key
    )
    public_key = sa.Column(
        sa.String(32), nullable=False, unique=True, index=True, default=generate_api_key
    )
    default_grouping = sa.Column(
        sa.Unicode(20), nullable=False, default="url_traceback"
    )
    error_report_threshold = sa.Column(sa.Integer(), default=10)
    slow_report_threshold = sa.Column(sa.Integer(), default=10)
    allow_permanent_storage = sa.Column(sa.Boolean(), default=False, nullable=False)

    @sa.orm.validates("default_grouping")
    def validate_default_grouping(self, key, grouping):
        """ validate if resouce can have specific permission """
        assert grouping in ["url_type", "url_traceback", "traceback_server"]
        return grouping

    report_groups = sa.orm.relationship(
        "ReportGroup",
        cascade="all, delete-orphan",
        passive_deletes=True,
        passive_updates=True,
        lazy="dynamic",
        backref=sa.orm.backref("application", lazy="joined"),
    )

    postprocess_conf = sa.orm.relationship(
        "ApplicationPostprocessConf",
        cascade="all, delete-orphan",
        passive_deletes=True,
        passive_updates=True,
        backref="resource",
    )

    logs = sa.orm.relationship(
        "Log",
        lazy="dynamic",
        backref="application",
        passive_deletes=True,
        passive_updates=True,
    )

    integrations = sa.orm.relationship(
        "IntegrationBase",
        backref="resource",
        cascade="all, delete-orphan",
        passive_deletes=True,
        passive_updates=True,
    )

    def generate_api_key(self):
        return generate_api_key()


def after_update(mapper, connection, target):
    from appenlight.models.services.application import ApplicationService

    log.info("clearing out ApplicationService cache")
    ApplicationService.by_id_cached().invalidate(target.resource_id)
    ApplicationService.by_api_key_cached().invalidate(target.api_key)


sa.event.listen(Application, "after_update", after_update)
sa.event.listen(Application, "after_delete", after_update)