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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.

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#   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

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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

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from kamaki.clients import Client, ClientError

from kamaki.clients.utils import path4url

class ImageClient(Client):

    """OpenStack Image Service API 1.0 and GRNET Plankton client"""

    def __init__(self, base_url, token):

        super(ImageClient, self).__init__(base_url, token)

    def raise_for_status(self, r):

        if r.status_code == 404:

            raise ClientError("Image not found", r.status_code)

        # Fallback to the default

        super(ImageClient, self).raise_for_status(r)

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

        path = path4url('images', 'detail') if detail else path4url('images/')

        if isinstance(filters, dict):

            self.http_client.params.update(filters)

        if order.startswith('-'):

            self.set_param('sort_dir', 'desc')

            order = order[1:]

        else:

            self.set_param('sort_dir', 'asc')

        self.set_param('sort_key', order, iff=order)

        r = self.get(path, success=200)

        return r.json

    def get_meta(self, image_id):

        path = path4url('images', image_id)

        r = self.head(path, success=200)

        reply = {}

        properties = {}

        meta_prefix = 'x-image-meta-'

        property_prefix = 'x-image-meta-property-'

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

            key = key.lower()

            if key.startswith(property_prefix):

                key = key[len(property_prefix):]

                properties[key] = val

            elif key.startswith(meta_prefix):

                key = key[len(meta_prefix):]

                reply[key] = val

        if properties:

            reply['properties'] = properties

        return reply

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

        path = path4url('images/')

        self.set_header('X-Image-Meta-Name', name)

        self.set_header('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('_', '-')

                self.set_header(key, val)

        for key, val in properties.items():

            self.set_header('X-Image-Meta-Property-%s' % key, val)

        try:

            r = self.post(path, success=200)

        except ClientError as err:

            try:

                prefix, suffix = err.details.split('File not found')

                details = '%s Location %s not found %s' %\

                    (prefix, location, suffix)

                raise ClientError(err.message, err.status, details)

            except ValueError:

                pass

            raise err

        r.release()

    def list_members(self, image_id):

        path = path4url('images', image_id, 'members')

        r = self.get(path, success=200)

        return r.json['members']

    def list_shared(self, member):

        path = path4url('shared-images', member)

        #self.set_param('format', 'json')

        r = self.get(path, success=200)

        return r.json['shared_images']

    def add_member(self, image_id, member):

        path = path4url('images', image_id, 'members', member)

        r = self.put(path, success=204)

        r.release()

    def remove_member(self, image_id, member):

        path = path4url('images', image_id, 'members', member)

        r = self.delete(path, success=204)

        r.release()

    def set_members(self, image_id, members):

        path = path4url('images', image_id, 'members')

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

        r = self.put(path, json=req, success=204)

        r.release()