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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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#      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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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

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from . import Client, ClientError

class ComputeClient(Client):

    """OpenStack Compute API 1.1 client"""

    def raise_for_status(self, r):

        d = r.json

        if not d:

            return super(ComputeClient, self).raise_for_status(r)

        key = d.keys()[0]

        val = d[key]

        message = '%s: %s' % (key, val.get('message', ''))

        details = val.get('details', '')

        raise ClientError(message, r.status_code, details)

    def list_servers(self, detail=False):

        """List servers, returned detailed output if detailed is True"""

        path = '/servers/detail' if detail else '/servers'

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

        return r.json['servers']['values']

    def get_server_details(self, server_id):

        """Return detailed output on a server specified by its id"""

        path = '/servers/%s' % (server_id,)

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

        return r.json['server']

    def create_server(self, name, flavor_id, image_id, personality=None):

        """Submit request to create a new server

        The flavor_id specifies the hardware configuration to use,

        the image_id specifies the OS Image to be deployed inside the new

        server.

        The personality argument is a list of (file path, file contents)

        tuples, describing files to be injected into the server upon creation.

        The call returns a dictionary describing the newly created server.

        """

        req = {'server': {'name': name,

                          'flavorRef': flavor_id,

                          'imageRef': image_id}}

        if personality:

            req['server']['personality'] = personality

        r = self.post('/servers', json=req, success=202)

        return r.json['server']

    def update_server_name(self, server_id, new_name):

        """Update the name of the server as reported by the API.

        This call does not modify the hostname actually used by the server

        internally.

        """

        path = '/servers/%s' % (server_id,)

        req = {'server': {'name': new_name}}

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

    def delete_server(self, server_id):

        """Submit a deletion request for a server specified by id"""

        path = '/servers/%s' % (server_id,)

        self.delete(path, success=204)

    def reboot_server(self, server_id, hard=False):

        """Submit a reboot request for a server specified by id"""

        path = '/servers/%s/action' % (server_id,)

        type = 'HARD' if hard else 'SOFT'

        req = {'reboot': {'type': type}}

        self.post(path, json=req, success=202)

    def get_server_metadata(self, server_id, key=None):

        path = '/servers/%s/meta' % (server_id,)

        if key:

            path += '/%s' % key

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

        return r.json['meta'] if key else r.json['metadata']['values']

    def create_server_metadata(self, server_id, key, val):

        path = '/servers/%d/meta/%s' % (server_id, key)

        req = {'meta': {key: val}}

        r = self.put(path, json=req, success=201)

        return r.json['meta']

    def update_server_metadata(self, server_id, **metadata):

        path = '/servers/%d/meta' % (server_id,)

        req = {'metadata': metadata}

        r = self.post(path, json=req, success=201)

        return r.json['metadata']

    def delete_server_metadata(self, server_id, key):

        path = '/servers/%d/meta/%s' % (server_id, key)

        self.delete(path, success=204)

    def list_flavors(self, detail=False):

        path = '/flavors/detail' if detail else '/flavors'

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

        return r.json['flavors']['values']

    def get_flavor_details(self, flavor_id):

        path = '/flavors/%d' % flavor_id

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

        return r.json['flavor']

    def list_images(self, detail=False):

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

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

        return r.json['images']['values']

    def get_image_details(self, image_id):

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

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

        return r.json['image']

    def delete_image(self, image_id):

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

        self.delete(path, success=204)

    def get_image_metadata(self, image_id, key=None):

        path = '/images/%s/meta' % (image_id,)

        if key:

            path += '/%s' % key

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

        return r.json['meta'] if key else r.json['metadata']['values']

    def create_image_metadata(self, image_id, key, val):

        path = '/images/%s/meta/%s' % (image_id, key)

        req = {'meta': {key: val}}

        r = self.put(path, json=req, success=201)

        return r.json['meta']

    def update_image_metadata(self, image_id, **metadata):

        path = '/images/%s/meta' % (image_id,)

        req = {'metadata': metadata}

        r = self.post(path, json=req, success=201)

        return r.json['metadata']

    def delete_image_metadata(self, image_id, key):

        path = '/images/%s/meta/%s' % (image_id, key)

        self.delete(path, success=204)