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

# Copyright 2018 Whitestack, LLC
# *************************************************************

# This file is part of OSM Monitoring module
# All Rights Reserved to Whitestack, LLC

# 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.

# For those usages not covered by the Apache License, Version 2.0 please
# contact: bdiaz@whitestack.com or glavado@whitestack.com
##
from typing import List

from osm_common import dbmongo, dbmemory

from osm_mon.core.config import Config
from osm_mon.core.models import Alarm


class CommonDbClient:
    def __init__(self, config: Config):
        if config.get('database', 'driver') == "mongo":
            self.common_db = dbmongo.DbMongo()
        elif config.get('database', 'driver') == "memory":
            self.common_db = dbmemory.DbMemory()
        else:
            raise Exception("Unknown database driver {}".format(config.get('section', 'driver')))
        self.common_db.db_connect(config.get("database"))

    def get_vnfr(self, nsr_id: str, member_index: int):
        vnfr = self.common_db.get_one("vnfrs",
                                      {"nsr-id-ref": nsr_id, "member-vnf-index-ref": str(member_index)})
        return vnfr

    def get_vnfrs(self, nsr_id: str = None, vim_account_id: str = None):
        if nsr_id and vim_account_id:
            raise NotImplementedError("Only one filter is currently supported")
        if nsr_id:
            vnfrs = [self.get_vnfr(nsr_id, member['member-vnf-index']) for member in
                     self.get_nsr(nsr_id)['nsd']['constituent-vnfd']]
        elif vim_account_id:
            vnfrs = self.common_db.get_list("vnfrs",
                                            {"vim-account-id": vim_account_id})
        else:
            vnfrs = self.common_db.get_list('vnfrs')
        return vnfrs

    def get_vnfd(self, vnfd_id: str):
        vnfd = self.common_db.get_one("vnfds",
                                      {"_id": vnfd_id})
        return vnfd

    def get_vnfd_by_name(self, vnfd_name: str):
        # TODO: optimize way of getting single VNFD in shared enviroments (RBAC)
        if self.common_db.get_list("vnfds", {"name": vnfd_name}):
            vnfd = self.common_db.get_list("vnfds", {"name": vnfd_name})[0]
            return vnfd
        else:
            return None

    def get_nsrs(self):
        return self.common_db.get_list('nsrs')

    def get_nsr(self, nsr_id: str):
        nsr = self.common_db.get_one("nsrs",
                                     {"id": nsr_id})
        return nsr

    def get_nslcmop(self, nslcmop_id):
        nslcmop = self.common_db.get_one("nslcmops",
                                         {"_id": nslcmop_id})
        return nslcmop

    def get_vdur(self, nsr_id, member_index, vdur_name):
        vnfr = self.get_vnfr(nsr_id, member_index)
        for vdur in vnfr['vdur']:
            if vdur['name'] == vdur_name:
                return vdur
        raise ValueError('vdur not found for nsr-id {}, member_index {} and vdur_name {}'.format(nsr_id, member_index,
                                                                                                 vdur_name))

    def decrypt_vim_password(self, vim_password: str, schema_version: str, vim_id: str):
        return self.common_db.decrypt(vim_password, schema_version, vim_id)

    def decrypt_sdnc_password(self, sdnc_password: str, schema_version: str, sdnc_id: str):
        return self.common_db.decrypt(sdnc_password, schema_version, sdnc_id)

    def get_vim_account_id(self, nsr_id: str, vnf_member_index: int) -> str:
        vnfr = self.get_vnfr(nsr_id, vnf_member_index)
        return vnfr['vim-account-id']

    def get_vim_accounts(self):
        return self.common_db.get_list('vim_accounts')

    def get_vim_account(self, vim_account_id: str) -> dict:
        vim_account = self.common_db.get_one('vim_accounts', {"_id": vim_account_id})
        vim_account['vim_password'] = self.decrypt_vim_password(vim_account['vim_password'],
                                                                vim_account['schema_version'],
                                                                vim_account_id)
        vim_config_encrypted_dict = {
            "1.1": ("admin_password", "nsx_password", "vcenter_password"),
            "default": ("admin_password", "nsx_password", "vcenter_password", "vrops_password")
        }
        vim_config_encrypted = vim_config_encrypted_dict['default']
        if vim_account['schema_version'] in vim_config_encrypted_dict.keys():
            vim_config_encrypted = vim_config_encrypted_dict[vim_account['schema_version']]
        if 'config' in vim_account:
            for key in vim_account['config']:
                if key in vim_config_encrypted:
                    vim_account['config'][key] = self.decrypt_vim_password(vim_account['config'][key],
                                                                           vim_account['schema_version'],
                                                                           vim_account_id)
        return vim_account

    def get_sdncs(self):
        return self.common_db.get_list('sdns')

    def get_sdnc(self, sdnc_id: str):
        return self.common_db.get_one('sdns', {'_id': sdnc_id})

    def get_projects(self):
        return self.common_db.get_list('projects')

    def get_project(self, project_id: str):
        return self.common_db.get_one('projects', {'_id': project_id})

    def create_alarm(self, alarm: Alarm):
        return self.common_db.create('alarms', alarm.to_dict())

    def delete_alarm(self, alarm_uuid: str):
        return self.common_db.del_one('alarms', {'uuid': alarm_uuid})

    def get_alarms(self) -> List[Alarm]:
        alarms = []
        alarm_dicts = self.common_db.get_list('alarms')
        for alarm_dict in alarm_dicts:
            alarms.append(Alarm.from_dict(alarm_dict))
        return alarms
