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# Copyright 2011 GRNET S.A. All rights reserved.

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# without modification, are permitted provided that the following

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#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. 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 GRNET S.A. ``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 GRNET S.A OR

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import json

import logging

import requests

from requests.auth import AuthBase

sendlog = logging.getLogger('clients.send')

recvlog = logging.getLogger('clients.recv')

# Add a convenience json property to the responses

def _json(self):

    try:

        return json.loads(self.content) if self.content else {}

    except ValueError:

        raise ClientError("Invalid JSON reply", self.status_code)

requests.Response.json = property(_json)

# Add a convenience status property to the responses

def _status(self):

    return requests.status_codes._codes[self.status_code][0].upper()

requests.Response.status = property(_status)

class XAuthTokenAuth(AuthBase):

    def __init__(self, token):

        self.token = token

    def __call__(self, r):

        r.headers['X-Auth-Token'] = self.token

        return r

class ClientError(Exception):

    def __init__(self, message, status=0, details=''):

        self.message = message

        self.status = status

        self.details = details

class Client(object):

    def __init__(self, base_url, token, include=False, verbose=False):

        self.base_url = base_url

        self.auth = XAuthTokenAuth(token)

        self.include = include

        self.verbose = verbose

    def raise_for_status(self, r):

        if 400 <= r.status_code < 500:

            message, sep, details = r.text.partition('\n')

        elif 500 <= r.status_code < 600:

            message = '%d Server Error' % (r.status_code,)

            details = r.text

        else:

            message = '%d Unknown Error' % (r.status_code,)

            details = r.text

        message = message or "HTTP Error %d" % (r.status_code,)

        raise ClientError(message, r.status_code, details)

    def request(self, method, path, **kwargs):

        raw = kwargs.pop('raw', False)

        success = kwargs.pop('success', 200)

        if 'json' in kwargs:

            data = json.dumps(kwargs.pop('json'))

            kwargs['data'] = data

            headers = kwargs.setdefault('headers', {})

            headers['content-type'] = 'application/json'

        url = self.base_url + path

        kwargs.setdefault('auth', self.auth)

        r = requests.request(method, url, **kwargs)

        req = r.request

        sendlog.info('%s %s', req.method, req.url)

        for key, val in req.headers.items():

            sendlog.info('%s: %s', key, val)

        sendlog.info('')

        if req.data:

            sendlog.info('%s', req.data)

        recvlog.info('%d %s', r.status_code, r.status)

        for key, val in r.headers.items():

            recvlog.info('%s: %s', key, val)

        recvlog.info('')

        if not raw and r.text:

            recvlog.debug(r.text)

        if success is not None:

            # Success can either be an in or a collection

            success = (success,) if isinstance(success, int) else success

            if r.status_code not in success:

                self.raise_for_status(r)

        return r

    def delete(self, path, **kwargs):

        return self.request('delete', path, **kwargs)

    def get(self, path, **kwargs):

        return self.request('get', path, **kwargs)

    def head(self, path, **kwargs):

        return self.request('head', path, **kwargs)

    def post(self, path, **kwargs):

        return self.request('post', path, **kwargs)

    def put(self, path, **kwargs):

        return self.request('put', path, **kwargs)

from .compute import ComputeClient as compute

from .image import ImageClient as image

from .storage import StorageClient as storage

from .cyclades import CycladesClient as cyclades

from .pithos import PithosClient as pithos