# -*- 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 sqlalchemy as sa
import hashlib

from datetime import datetime, timedelta
from appenlight.models import Base
from sqlalchemy.dialects.postgresql import JSON
from ziggurat_foundations.models.base import BaseModel


class SlowCall(Base, BaseModel):
    __tablename__ = 'slow_calls'
    __table_args__ = {'implicit_returning': False}

    resource_id = sa.Column(sa.Integer(), nullable=False, index=True)
    id = sa.Column(sa.Integer, nullable=False, primary_key=True)
    report_id = sa.Column(sa.BigInteger,
                          sa.ForeignKey('reports.id',
                                        ondelete='cascade',
                                        onupdate='cascade'),
                          primary_key=True)
    duration = sa.Column(sa.Float(), default=0)
    statement = sa.Column(sa.UnicodeText(), default='')
    statement_hash = sa.Column(sa.Unicode(60), default='')
    parameters = sa.Column(JSON(), nullable=False, default=dict)
    type = sa.Column(sa.Unicode(16), default='')
    subtype = sa.Column(sa.Unicode(16), default=None)
    location = sa.Column(sa.Unicode(255), default='')
    timestamp = sa.Column(sa.DateTime(), default=datetime.utcnow,
                          server_default=sa.func.now())
    report_group_time = sa.Column(sa.DateTime(), default=datetime.utcnow,
                                  server_default=sa.func.now())

    def set_data(self, data, protocol_version=None, resource_id=None,
                 report_group=None):
        self.resource_id = resource_id
        if data.get('start') and data.get('end'):
            self.timestamp = data.get('start')
            d = data.get('end') - data.get('start')
            self.duration = d.total_seconds()
        self.statement = data.get('statement', '')
        self.type = data.get('type', 'unknown')[:16]
        self.parameters = data.get('parameters', {})
        self.location = data.get('location', '')[:255]
        self.report_group_time = report_group.first_timestamp
        if 'subtype' in data:
            self.subtype = data.get('subtype', 'unknown')[:16]
        if self.type == 'tmpl':
            self.set_hash('{} {}'.format(self.statement, self.parameters))
        else:
            self.set_hash()

    def set_hash(self, custom_statement=None):
        statement = custom_statement or self.statement
        self.statement_hash = hashlib.sha1(
            statement.encode('utf8')).hexdigest()

    @property
    def end_time(self):
        if self.duration and self.timestamp:
            return self.timestamp + timedelta(seconds=self.duration)
        return None

    def get_dict(self):
        instance_dict = super(SlowCall, self).get_dict()
        instance_dict['children'] = []
        instance_dict['end_time'] = self.end_time
        return instance_dict

    def es_doc(self):
        doc = {
            'resource_id': self.resource_id,
            'timestamp': self.timestamp,
            'pg_id': str(self.id),
            'permanent': False,
            'request_id': None,
            'log_level': 'UNKNOWN',
            'message': self.statement,
            'namespace': 'appenlight.slow_call',
            'tags': {
                'report_id': {'values': self.report_id,
                              'numeric_values': self.report_id},
                'duration': {'values': None, 'numeric_values': self.duration},
                'statement_hash': {'values': self.statement_hash,
                                   'numeric_values': None},
                'type': {'values': self.type, 'numeric_values': None},
                'subtype': {'values': self.subtype, 'numeric_values': None},
                'location': {'values': self.location, 'numeric_values': None},
                'parameters': {'values': None, 'numeric_values': None}
            },
            'tag_list': ['report_id', 'duration', 'statement_hash', 'type',
                         'subtype', 'location']
        }
        if isinstance(self.parameters, str):
            doc['tags']['parameters']['values'] = self.parameters[:255]
        return doc

    @property
    def partition_id(self):
        return 'rcae_sc_%s' % self.report_group_time.strftime('%Y_%m')