# Copyright 2015 - Mirantis, Inc.
# Copyright 2015 - StackStorm, Inc.
#
#    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 contextlib

from oslo_db import api as db_api


_BACKEND_MAPPING = {
    'sqlalchemy': 'mistral.db.v2.sqlalchemy.api',
}

IMPL = db_api.DBAPI('sqlalchemy', backend_mapping=_BACKEND_MAPPING)


def setup_db():
    IMPL.setup_db()


def drop_db():
    IMPL.drop_db()


# Transaction control.


def start_tx():
    IMPL.start_tx()


def commit_tx():
    IMPL.commit_tx()


def rollback_tx():
    IMPL.rollback_tx()


def end_tx():
    IMPL.end_tx()


@contextlib.contextmanager
def transaction():
    with IMPL.transaction():
        yield


# Locking.


def acquire_lock(model, id):
    return IMPL.acquire_lock(model, id)


# Workbooks.

def get_workbook(name):
    return IMPL.get_workbook(name)


def load_workbook(name):
    """Unlike get_workbook this method is allowed to return None."""
    return IMPL.load_workbook(name)


def get_workbooks():
    return IMPL.get_workbooks()


def create_workbook(values):
    return IMPL.create_workbook(values)


def update_workbook(name, values):
    return IMPL.update_workbook(name, values)


def create_or_update_workbook(name, values):
    return IMPL.create_or_update_workbook(name, values)


def delete_workbook(name):
    IMPL.delete_workbook(name)


def delete_workbooks(**kwargs):
    IMPL.delete_workbooks(**kwargs)


# Workflow definitions.

def get_workflow_definition(identifier):
    return IMPL.get_workflow_definition(identifier)


def get_workflow_definition_by_id(id):
    return IMPL.get_workflow_definition_by_id(id)


def load_workflow_definition(name):
    """Unlike get_workflow_definition this method is allowed to return None."""
    return IMPL.load_workflow_definition(name)


def get_workflow_definitions(limit=None, marker=None, sort_keys=None,
                             sort_dirs=None, fields=None, **kwargs):
    return IMPL.get_workflow_definitions(
        limit=limit,
        marker=marker,
        sort_keys=sort_keys,
        sort_dirs=sort_dirs,
        fields=fields,
        **kwargs
    )


def create_workflow_definition(values):
    return IMPL.create_workflow_definition(values)


def update_workflow_definition(identifier, values):
    return IMPL.update_workflow_definition(identifier, values)


def create_or_update_workflow_definition(name, values):
    return IMPL.create_or_update_workflow_definition(name, values)


def delete_workflow_definition(identifier):
    IMPL.delete_workflow_definition(identifier)


def delete_workflow_definitions(**kwargs):
    IMPL.delete_workflow_definitions(**kwargs)


# Action definitions.

def get_action_definition_by_id(id):
    return IMPL.get_action_definition_by_id(id)


def get_action_definition(name):
    return IMPL.get_action_definition(name)


def load_action_definition(name):
    """Unlike get_action_definition this method is allowed to return None."""
    return IMPL.load_action_definition(name)


def get_action_definitions(limit=None, marker=None, sort_keys=['name'],
                           sort_dirs=None, **kwargs):
    return IMPL.get_action_definitions(
        limit=limit,
        marker=marker,
        sort_keys=sort_keys,
        sort_dirs=sort_dirs,
        **kwargs
    )


def create_action_definition(values):
    return IMPL.create_action_definition(values)


def update_action_definition(name, values):
    return IMPL.update_action_definition(name, values)


def create_or_update_action_definition(name, values):
    return IMPL.create_or_update_action_definition(name, values)


def delete_action_definition(name):
    return IMPL.delete_action_definition(name)


def delete_action_definitions(**kwargs):
    return IMPL.delete_action_definitions(**kwargs)


# Common executions.

def get_execution(id):
    return IMPL.get_execution(id)


def load_execution(name):
    """Unlike get_execution this method is allowed to return None."""
    return IMPL.load_execution(name)


def get_executions(**kwargs):
    return IMPL.get_executions(**kwargs)


def ensure_execution_exists(id):
    return IMPL.ensure_execution_exists(id)


def create_execution(values):
    return IMPL.create_execution(values)


def update_execution(id, values):
    return IMPL.update_execution(id, values)


def create_or_update_execution(id, values):
    return IMPL.create_or_update_execution(id, values)


def delete_execution(id):
    return IMPL.delete_execution(id)


def delete_executions(**kwargs):
    IMPL.delete_executions(**kwargs)


# Action executions.

def get_action_execution(id):
    return IMPL.get_action_execution(id)


def load_action_execution(name):
    """Unlike get_action_execution this method is allowed to return None."""
    return IMPL.load_action_execution(name)


def get_action_executions(**kwargs):
    return IMPL.get_action_executions(**kwargs)


def ensure_action_execution_exists(id):
    return IMPL.ensure_action_execution_exists(id)


def create_action_execution(values):
    return IMPL.create_action_execution(values)


def update_action_execution(id, values):
    return IMPL.update_action_execution(id, values)


def create_or_update_action_execution(id, values):
    return IMPL.create_or_update_action_execution(id, values)


def delete_action_execution(id):
    return IMPL.delete_action_execution(id)


def delete_action_executions(**kwargs):
    IMPL.delete_action_executions(**kwargs)


# Workflow executions.

def get_workflow_execution(id):
    return IMPL.get_workflow_execution(id)


def load_workflow_execution(name):
    """Unlike get_workflow_execution this method is allowed to return None."""
    return IMPL.load_workflow_execution(name)


def get_workflow_executions(limit=None, marker=None, sort_keys=['created_at'],
                            sort_dirs=None, **kwargs):
    return IMPL.get_workflow_executions(
        limit=limit,
        marker=marker,
        sort_keys=sort_keys,
        sort_dirs=sort_dirs,
        **kwargs
    )


def ensure_workflow_execution_exists(id):
    return IMPL.ensure_workflow_execution_exists(id)


def create_workflow_execution(values):
    return IMPL.create_workflow_execution(values)


def update_workflow_execution(id, values):
    return IMPL.update_workflow_execution(id, values)


def create_or_update_workflow_execution(id, values):
    return IMPL.create_or_update_workflow_execution(id, values)


def delete_workflow_execution(id):
    return IMPL.delete_workflow_execution(id)


def delete_workflow_executions(**kwargs):
    IMPL.delete_workflow_executions(**kwargs)


# Tasks executions.

def get_task_execution(id):
    return IMPL.get_task_execution(id)


def load_task_execution(name):
    """Unlike get_task_execution this method is allowed to return None."""
    return IMPL.load_task_execution(name)


def get_task_executions(**kwargs):
    return IMPL.get_task_executions(**kwargs)


def create_task_execution(values):
    return IMPL.create_task_execution(values)


def update_task_execution(id, values):
    return IMPL.update_task_execution(id, values)


def create_or_update_task_execution(id, values):
    return IMPL.create_or_update_task_execution(id, values)


def delete_task_execution(id):
    return IMPL.delete_task_execution(id)


def delete_task_executions(**kwargs):
    return IMPL.delete_task_executions(**kwargs)


# Delayed calls.

def get_delayed_calls_to_start(time):
    return IMPL.get_delayed_calls_to_start(time)


def create_delayed_call(values):
    return IMPL.create_delayed_call(values)


def delete_delayed_call(id):
    return IMPL.delete_delayed_call(id)


def update_delayed_call(id, values, query_filter=None):
    return IMPL.update_delayed_call(id, values, query_filter)


def get_delayed_call(id):
    return IMPL.get_delayed_call(id)


# Cron triggers.

def get_cron_trigger(name):
    return IMPL.get_cron_trigger(name)


def load_cron_trigger(name):
    """Unlike get_cron_trigger this method is allowed to return None."""
    return IMPL.load_cron_trigger(name)


def get_cron_triggers(**kwargs):
    return IMPL.get_cron_triggers(**kwargs)


def get_next_cron_triggers(time):
    return IMPL.get_next_cron_triggers(time)


def get_expired_executions(time):
    return IMPL.get_expired_executions(time)


def create_cron_trigger(values):
    return IMPL.create_cron_trigger(values)


def update_cron_trigger(name, values, query_filter=None):
    return IMPL.update_cron_trigger(name, values, query_filter=query_filter)


def create_or_update_cron_trigger(name, values):
    return IMPL.create_or_update_cron_trigger(name, values)


def delete_cron_trigger(name):
    return IMPL.delete_cron_trigger(name)


def delete_cron_triggers(**kwargs):
    return IMPL.delete_cron_triggers(**kwargs)


# Environments.

def get_environment(name):
    return IMPL.get_environment(name)


def load_environment(name):
    """Unlike get_environment this method is allowed to return None."""
    return IMPL.load_environment(name)


def get_environments():
    return IMPL.get_environments()


def create_environment(values):
    return IMPL.create_environment(values)


def update_environment(name, values):
    return IMPL.update_environment(name, values)


def create_or_update_environment(name, values):
    return IMPL.create_or_update_environment(name, values)


def delete_environment(name):
    IMPL.delete_environment(name)


def delete_environments(**kwargs):
    IMPL.delete_environments(**kwargs)


# Resource members.


def create_resource_member(values):
    return IMPL.create_resource_member(values)


def get_resource_member(resource_id, res_type, member_id):
    return IMPL.get_resource_member(resource_id, res_type, member_id)


def get_resource_members(resource_id, res_type):
    return IMPL.get_resource_members(resource_id, res_type)


def update_resource_member(resource_id, res_type, member_id, values):
    return IMPL.update_resource_member(
        resource_id,
        res_type,
        member_id,
        values
    )


def delete_resource_member(resource_id, res_type, member_id):
    IMPL.delete_resource_member(resource_id, res_type, member_id)


def delete_resource_members(**kwargs):
    IMPL.delete_resource_members(**kwargs)
