# This code is part of Ansible, but is an independent component.
# This particular file snippet, and this file snippet only, is BSD licensed.
# Modules you write using this snippet, which is embedded dynamically by Ansible
# still belong to the author of the module, and may assign their own license
# to the complete work.
#
# Copyright (c), Ansible Project 2017
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
#    * Redistributions of source code must retain the above copyright
#      notice, this list of conditions and the following disclaimer.
#    * Redistributions in binary form must reproduce the above copyright notice,
#      this list of conditions and the following disclaimer in the documentation
#      and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import json
import os
from ansible.module_utils.urls import fetch_url
from ansible.module_utils._text import to_text


class Response(object):

    def __init__(self, resp, info):
        self.body = None
        if resp:
            self.body = resp.read()
        self.info = info

    @property
    def json(self):
        if not self.body:
            if "body" in self.info:
                return json.loads(to_text(self.info["body"]))
            return None
        try:
            return json.loads(to_text(self.body))
        except ValueError:
            return None

    @property
    def status_code(self):
        return self.info["status"]


class DigitalOceanHelper:

    def __init__(self, module):
        self.module = module
        self.baseurl = 'https://api.digitalocean.com/v2'
        self.oauth_token = None
        self.get_do_oauth_token()
        self.headers = {'Authorization': 'Bearer {0}'.format(self.oauth_token),
                        'Content-type': 'application/json'}

    def _url_builder(self, path):
        if path[0] == '/':
            path = path[1:]
        return '%s/%s' % (self.baseurl, path)

    def send(self, method, path, data=None):
        url = self._url_builder(path)
        data = self.module.jsonify(data)

        resp, info = fetch_url(self.module, url, data=data, headers=self.headers, method=method)

        return Response(resp, info)

    def get(self, path, data=None):
        return self.send('GET', path, data)

    def put(self, path, data=None):
        return self.send('PUT', path, data)

    def post(self, path, data=None):
        return self.send('POST', path, data)

    def delete(self, path, data=None):
        return self.send('DELETE', path, data)

    def get_do_oauth_token(self):
        self.oauth_token = self.module.params.get('oauth_token') or \
            self.module.params.get('api_token') or \
            os.environ.get('DO_API_TOKEN') or \
            os.environ.get('DO_API_KEY') or \
            os.environ.get('OAUTH_TOKEN')
        if self.oauth_token is None:
            self.module.fail_json(msg='Unable to load api key: oauth_token')