# Copyright 2013 - Mirantis, Inc.
# Copyright 2016 - StackStorm, Inc.
# Copyright 2016 - Ericsson AB.
# Copyright (c) 2017-2021, 2024 Wind River Systems, 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 copy
import logging
import os

import osprofiler.web
import requests

CONTENT_TYPE = "content-type"
LOG = logging.getLogger(__name__)


def log_request(func):
    def decorator(self, *args, **kwargs):
        resp = func(self, *args, **kwargs)
        LOG.debug(
            "HTTP %s %s %d %s",
            resp.request.method,
            resp.url,
            resp.status_code,
            resp.text,
        )
        return resp

    return decorator


class HTTPClient:
    def __init__(
        self,
        base_url,
        token=None,
        project_id=None,
        user_id=None,
        cacert=None,
        insecure=False,
    ):
        self.base_url = base_url
        self.token = token
        self.project_id = project_id
        self.user_id = user_id
        self.ssl_options = {}

        if self.base_url.startswith("https"):
            if cacert and not os.path.exists(cacert):
                raise ValueError("Unable to locate cacert file at {cacert}.")

            if cacert and insecure:
                LOG.warning(
                    "Client is set to not verify even though cacert is provided."
                )

            if insecure:
                self.ssl_options["verify"] = False
            else:
                self.ssl_options["verify"] = True if not cacert else cacert

    @log_request
    def get(self, url, headers=None):
        options = self._get_request_options("get", headers)

        return requests.get(self.base_url + url, **options)

    @log_request
    def post(self, url, body, headers=None):
        options = self._get_request_options("post", headers)

        return requests.post(self.base_url + url, body, **options)

    @log_request
    def put(self, url, body, headers=None):
        options = self._get_request_options("put", headers)

        return requests.put(self.base_url + url, body, **options)

    @log_request
    def patch(self, url, body, headers=None):
        options = self._get_request_options("patch", headers)

        return requests.patch(self.base_url + url, body, **options)

    @log_request
    def delete(self, url, headers=None):
        options = self._get_request_options("delete", headers)

        return requests.delete(self.base_url + url, **options)

    def _get_request_options(self, method, headers):
        headers = self._update_headers(headers)

        if method in ["post", "put", "patch"] and CONTENT_TYPE not in headers:
            content_type = headers.get(CONTENT_TYPE, "application/json")
            headers[CONTENT_TYPE] = content_type

        options = copy.deepcopy(self.ssl_options)
        options["headers"] = headers

        return options

    def _update_headers(self, headers):
        if not headers:
            headers = {}

        token = headers.get("x-auth-token", self.token)
        if token:
            headers["x-auth-token"] = token

        project_id = headers.get("X-Project-Id", self.project_id)
        if project_id:
            headers["X-Project-Id"] = project_id

        user_id = headers.get("X-User-Id", self.user_id)
        if user_id:
            headers["X-User-Id"] = user_id

        # Add headers for osprofiler.
        headers.update(osprofiler.web.get_trace_id_headers())

        return headers