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

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"""

    OpenStack Image Service API 1.0 client

"""

from urllib import quote

from .http import HTTPClient

class ImageClient(HTTPClient):

    @property

    def url(self):

        url = self.config.get('image_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('image_token') or self.config.get('token')

        if not token:

            raise ClientError('No token was given')

        return token

    def list_public(self, detail=False, filters={}, order=''):

        path = '/images/detail' if detail else '/images/'

        params = {}

        params.update(filters)

        if order.startswith('-'):

            params['sort_dir'] = 'desc'

            order = order[1:]

        else:

            params['sort_dir'] = 'asc'

        if order:

            params['sort_key'] = order

        if params:

            path += '?' + '&'.join('%s=%s' % item for item in params.items())

        return self.http_get(path)

    def get_meta(self, image_id):

        path = '/images/%s' % image_id

        resp, buf = self.raw_http_cmd('HEAD', path)

        reply = {}

        prefix = 'x-image-meta-'

        for key, val in resp.getheaders():

            key = key.lower()

            if not key.startswith(prefix):

                continue

            key = key[len(prefix):]

            reply[key] = val

        return reply

    def register(self, name, location, params={}, properties={}):

        path = '/images/'

        headers = {}

        headers['x-image-meta-name'] = quote(name)

        headers['x-image-meta-location'] = location

        for key, val in params.items():

            if key in ('id', 'store', 'disk_format', 'container_format',

                       'size', 'checksum', 'is_public', 'owner'):

                key = 'x-image-meta-' + key.replace('_', '-')

                headers[key] = val

        for key, val in properties.items():

            headers['x-image-meta-property-' + quote(key)] = quote(val)

        return self.http_post(path, headers=headers, success=200)

    def list_members(self, image_id):

        path = '/images/%s/members' % image_id

        reply = self.http_get(path)

        return reply['members']

    def list_shared(self, member):

        path = '/shared-images/%s' % member

        reply = self.http_get(path)

        return reply['shared_images']

    def add_member(self, image_id, member):

        path = '/images/%s/members/%s' % (image_id, member)

        self.http_put(path)

    def remove_member(self, image_id, member):

        path = '/images/%s/members/%s' % (image_id, member)

        self.http_delete(path)

    def set_members(self, image_id, members):

        path = '/images/%s/members' % image_id

        req = {'memberships': [{'member_id': member} for member in members]}

        body = json.dumps(req)

        self.http_put(path, body)