# -*- 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 logging
import sqlalchemy as sa

from datetime import datetime, timedelta

from pyramid.threadlocal import get_current_request
from sqlalchemy.dialects.postgresql import JSON
from ziggurat_foundations.models.base import BaseModel

from appenlight.models import Base, get_db_session, Datastores
from appenlight.lib.enums import ReportType
from appenlight.lib.rule import Rule
from appenlight.lib.redis_keys import REDIS_KEYS
from appenlight.models.report import REPORT_TYPE_MATRIX

log = logging.getLogger(__name__)


class ReportGroup(Base, BaseModel):
    __tablename__ = "reports_groups"
    __table_args__ = {"implicit_returning": False}

    id = sa.Column(sa.BigInteger(), nullable=False, primary_key=True)
    resource_id = sa.Column(
        sa.Integer(),
        sa.ForeignKey(
            "applications.resource_id", onupdate="CASCADE", ondelete="CASCADE"
        ),
        nullable=False,
        index=True,
    )
    priority = sa.Column(
        sa.Integer, nullable=False, index=True, default=5, server_default="5"
    )
    first_timestamp = sa.Column(
        sa.DateTime(), default=datetime.utcnow, server_default=sa.func.now()
    )
    last_timestamp = sa.Column(
        sa.DateTime(), default=datetime.utcnow, server_default=sa.func.now()
    )
    error = sa.Column(sa.UnicodeText(), index=True)
    grouping_hash = sa.Column(sa.String(40), default="")
    triggered_postprocesses_ids = sa.Column(JSON(), nullable=False, default=list)
    report_type = sa.Column(sa.Integer, default=1)
    total_reports = sa.Column(sa.Integer, default=1)
    last_report = sa.Column(sa.Integer)
    occurences = sa.Column(sa.Integer, default=1)
    average_duration = sa.Column(sa.Float, default=0)
    summed_duration = sa.Column(sa.Float, default=0)
    read = sa.Column(sa.Boolean(), index=True, default=False)
    fixed = sa.Column(sa.Boolean(), index=True, default=False)
    notified = sa.Column(sa.Boolean(), index=True, default=False)
    public = sa.Column(sa.Boolean(), index=True, default=False)

    reports = sa.orm.relationship(
        "Report",
        lazy="dynamic",
        backref="report_group",
        cascade="all, delete-orphan",
        passive_deletes=True,
        passive_updates=True,
    )

    comments = sa.orm.relationship(
        "ReportComment",
        lazy="dynamic",
        backref="report",
        cascade="all, delete-orphan",
        passive_deletes=True,
        passive_updates=True,
        order_by="ReportComment.comment_id",
    )

    assigned_users = sa.orm.relationship(
        "User",
        backref=sa.orm.backref(
            "assigned_reports_relation",
            lazy="dynamic",
            order_by=sa.desc(sa.text("reports_groups.id")),
        ),
        passive_deletes=True,
        passive_updates=True,
        secondary="reports_assignments",
        order_by="User.user_name",
    )

    stats = sa.orm.relationship(
        "ReportStat",
        lazy="dynamic",
        backref="report",
        passive_deletes=True,
        passive_updates=True,
    )

    last_report_ref = sa.orm.relationship(
        "Report",
        uselist=False,
        primaryjoin="ReportGroup.last_report " "== Report.id",
        foreign_keys="Report.id",
        cascade="all, delete-orphan",
        passive_deletes=True,
        passive_updates=True,
    )

    def __repr__(self):
        return "<ReportGroup id:{}>".format(self.id)

    def get_report(self, report_id=None, public=False):
        """
        Gets report with specific id or latest report if id was not specified
        """
        from .report import Report

        if not report_id:
            return self.last_report_ref
        else:
            return self.reports.filter(Report.id == report_id).first()

    def get_public_url(self, request, _app_url=None):
        url = request.route_url("/", _app_url=_app_url)
        return (url + "ui/report/%s") % self.id

    def run_postprocessing(self, report):
        """
        Alters report group priority based on postprocessing configuration
        """
        request = get_current_request()
        get_db_session(None, self).flush()
        for action in self.application.postprocess_conf:
            get_db_session(None, self).flush()
            rule_obj = Rule(action.rule, REPORT_TYPE_MATRIX)
            report_dict = report.get_dict(request)
            # if was not processed yet
            if (
                rule_obj.match(report_dict)
                and action.pkey not in self.triggered_postprocesses_ids
            ):
                action.postprocess(self)
                # this way sqla can track mutation of list
                self.triggered_postprocesses_ids = self.triggered_postprocesses_ids + [
                    action.pkey
                ]

        get_db_session(None, self).flush()
        # do not go out of bounds
        if self.priority < 1:
            self.priority = 1
        if self.priority > 10:
            self.priority = 10

    def get_dict(self, request):
        instance_dict = super(ReportGroup, self).get_dict()
        instance_dict["server_name"] = self.get_report().tags.get("server_name")
        instance_dict["view_name"] = self.get_report().tags.get("view_name")
        instance_dict["resource_name"] = self.application.resource_name
        instance_dict["report_type"] = self.get_report().report_type
        instance_dict["url_path"] = self.get_report().url_path
        instance_dict["front_url"] = self.get_report().get_public_url(request)
        del instance_dict["triggered_postprocesses_ids"]
        return instance_dict

    def es_doc(self):
        return {
            "_id": str(self.id),
            "group_id": str(self.id),
            "resource_id": self.resource_id,
            "error": self.error,
            "fixed": self.fixed,
            "public": self.public,
            "read": self.read,
            "priority": self.priority,
            "occurences": self.occurences,
            "average_duration": self.average_duration,
            "summed_duration": self.summed_duration,
            "first_timestamp": self.first_timestamp,
            "last_timestamp": self.last_timestamp,
            "type": "report_group",
            "join_field": {
                "name": "report_group"
            },
        }

    def set_notification_info(self, notify_10=False, notify_100=False):
        """
        Update redis notification maps for notification job
        """
        current_time = datetime.utcnow().replace(second=0, microsecond=0)
        # global app counter
        key = REDIS_KEYS["counters"]["reports_per_type"].format(
            self.report_type, current_time
        )
        redis_pipeline = Datastores.redis.pipeline()
        redis_pipeline.incr(key)
        redis_pipeline.expire(key, 3600 * 24)
        # detailed app notification for alerts and notifications
        redis_pipeline.sadd(REDIS_KEYS["apps_that_had_reports"], self.resource_id)
        redis_pipeline.sadd(
            REDIS_KEYS["apps_that_had_reports_alerting"], self.resource_id
        )
        # only notify for exceptions here
        if self.report_type == ReportType.error:
            redis_pipeline.sadd(REDIS_KEYS["apps_that_had_reports"], self.resource_id)
            redis_pipeline.sadd(
                REDIS_KEYS["apps_that_had_error_reports_alerting"], self.resource_id
            )
        key = REDIS_KEYS["counters"]["report_group_occurences"].format(self.id)
        redis_pipeline.incr(key)
        redis_pipeline.expire(key, 3600 * 24)
        key = REDIS_KEYS["counters"]["report_group_occurences_alerting"].format(self.id)
        redis_pipeline.incr(key)
        redis_pipeline.expire(key, 3600 * 24)

        if notify_10:
            key = REDIS_KEYS["counters"]["report_group_occurences_10th"].format(self.id)
            redis_pipeline.setex(key, 3600 * 24, 1)
        if notify_100:
            key = REDIS_KEYS["counters"]["report_group_occurences_100th"].format(
                self.id
            )
            redis_pipeline.setex(key, 3600 * 24, 1)

        key = REDIS_KEYS["reports_to_notify_per_type_per_app"].format(
            self.report_type, self.resource_id
        )
        redis_pipeline.sadd(key, self.id)
        redis_pipeline.expire(key, 3600 * 24)
        key = REDIS_KEYS["reports_to_notify_per_type_per_app_alerting"].format(
            self.report_type, self.resource_id
        )
        redis_pipeline.sadd(key, self.id)
        redis_pipeline.expire(key, 3600 * 24)
        redis_pipeline.execute()

    @property
    def partition_id(self):
        return "rcae_r_%s" % self.first_timestamp.strftime("%Y_%m")

    def partition_range(self):
        start_date = self.first_timestamp.date().replace(day=1)
        end_date = start_date + timedelta(days=40)
        end_date = end_date.replace(day=1)
        return start_date, end_date


def after_insert(mapper, connection, target):
    if not hasattr(target, "_skip_ft_index"):
        data = target.es_doc()
        data.pop("_id", None)
        Datastores.es.index(target.partition_id, "report", data, id=target.id)


def after_update(mapper, connection, target):
    if not hasattr(target, "_skip_ft_index"):
        data = target.es_doc()
        data.pop("_id", None)
        Datastores.es.index(target.partition_id, "report", data, id=target.id)


def after_delete(mapper, connection, target):
    query = {"query": {"term": {"group_id": target.id}}}
    # delete by query
    Datastores.es.delete_by_query(
        index=target.partition_id, doc_type="report", body=query, conflicts="proceed"
    )


sa.event.listen(ReportGroup, "after_insert", after_insert)
sa.event.listen(ReportGroup, "after_update", after_update)
sa.event.listen(ReportGroup, "after_delete", after_delete)