# Copyright (C) 2016-2020 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/

import time
import logging

import rhodecode
from rhodecode.lib.auth import AuthUser
from rhodecode.lib.base import get_ip_addr, get_user_agent
from rhodecode.lib.middleware.utils import get_path_info
from rhodecode.lib.utils2 import safe_str, get_current_rhodecode_user


log = logging.getLogger(__name__)


class RequestWrapperTween(object):
    def __init__(self, handler, registry):
        self.handler = handler
        self.registry = registry

        # one-time configuration code goes here

    def _get_user_info(self, request):
        user = get_current_rhodecode_user(request)
        if not user:
            user = AuthUser.repr_user(ip=get_ip_addr(request.environ))
        return user

    def __call__(self, request):
        start = time.time()
        log.debug('Starting request time measurement')
        response = None
        try:
            response = self.handler(request)
        finally:
            count = request.request_count()
            _ver_ = rhodecode.__version__
            _path = get_path_info(request.environ)
            _auth_user = self._get_user_info(request)
            ip = get_ip_addr(request.environ)
            match_route = request.matched_route.name if request.matched_route else "NOT_FOUND"
            resp_code = getattr(response, 'status_code', 'UNDEFINED')

            total = time.time() - start
            log.info(
                'Req[%4s] %s %s Request to %s time: %.4fs [%s], RhodeCode %s',
                count, _auth_user, request.environ.get('REQUEST_METHOD'),
                _path, total, get_user_agent(request. environ), _ver_,
                extra={"time": total, "ver": _ver_, "ip": ip,
                       "path": _path, "view_name": match_route, "code": resp_code}
            )

            statsd = request.registry.statsd
            if statsd:
                elapsed_time_ms = round(1000.0 * total)  # use ms only
                statsd.timing(
                    "rhodecode_req_timing.histogram", elapsed_time_ms,
                    tags=[
                        "view_name:{}".format(match_route),
                        "code:{}".format(resp_code)
                    ],
                    use_decimals=False
                )
                statsd.incr(
                    'rhodecode_req_total', tags=[
                        "view_name:{}".format(match_route),
                        "code:{}".format(resp_code)
                    ])

        return response


def includeme(config):
    config.add_tween(
        'rhodecode.lib.middleware.request_wrapper.RequestWrapperTween',
    )