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

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from . import ClientError

from .http import HTTPClient

class StorageClient(HTTPClient):

    """OpenStack Object Storage API 1.0 client"""

    @property

    def url(self):

        url = self.config.get('storage_url') or self.config.get('url')

        if not url:

            raise ClientError('No URL was given')

        return url

    @property

    def token(self):

        token = self.config.get('storage_token') or self.config.get('token')

        if not token:

            raise ClientError('No token was given')

        return token

    @property

    def account(self):

        account = self.config.get('storage_account')

        if not account:

            raise ClientError('No account was given')

        return account

    @property

    def container(self):

        container = self.config.get('storage_container')

        if not container:

            raise ClientError('No container was given')

        return container

    def get_container_meta(self):

        path = '/%s/%s' % (self.account, self.container)

        resp, reply = self.raw_http_cmd('HEAD', path, success=204)

        reply = {}

        prefix = 'x-container-'

        for key, val in resp.getheaders():

            key = key.lower()

            if key.startswith(prefix):

                reply[key[len(prefix):]] = val

        return reply

    def create_object(self, object, f):

        path = '/%s/%s/%s' % (self.account, self.container, object)

        data = f.read()

        self.http_put(path, data, success=201)

    def get_object(self, object):

        path = '/%s/%s/%s' % (self.account, self.container, object)

        resp, reply = self.raw_http_cmd('GET', path, success=200,

                skip_read=True)

        return resp.fp

    def delete_object(self, object):

        path = '/%s/%s/%s' % (self.account, self.container, object)

        self.http_delete(path)