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from kamaki.clients import ClientError

from kamaki.clients.compute.rest_api import ComputeRestClient

from kamaki.clients.utils import path4url

class ComputeClient(ComputeRestClient):

    """OpenStack Compute API 1.1 client"""

    def list_servers(self, detail=False):

        """

        :param detail: if true, append full server details to each item

        :returns: list of server ids and names

        """

        detail = 'detail' if detail else ''

        r = self.servers_get(command=detail)

        return r.json['servers']

    def get_server_details(self, server_id, **kwargs):

        """Return detailed info for a server

        :param server_id: integer (int or str)

        :returns: dict with server details

        """

        r = self.servers_get(server_id, **kwargs)

        return r.json['server']

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

        """Submit request to create a new server

        :param name: (str)

        :param flavor_id: integer id denoting a preset hardware configuration

        :param image_id: (str) id denoting the OS image to run on the VM

        :param personality: a list of (file path, file contents) tuples,

            describing files to be injected into VM upon creation.

        :returns: a dict with the new VMs details

        :raises ClientError: wraps request errors

        """

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

                          'flavorRef': flavor_id,

                          'imageRef': image_id}}

        image = self.get_image_details(image_id)

        metadata = {}

        for key in ('os', 'users'):

            try:

                metadata[key] = image['metadata'][key]

            except KeyError:

                pass

        if metadata:

            req['server']['metadata'] = metadata

        if personality:

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

        try:

            r = self.servers_post(json_data=req)

        except ClientError as err:

            try:

                if isinstance(err.details, list):

                    tmp_err = err.details

                else:

                    errd = '%s' % err.details

                    tmp_err = errd.split(',')

                tmp_err = tmp_err[0].split(':')

                tmp_err = tmp_err[2].split('"')

                err.message = tmp_err[1]

            finally:

                raise err

        return r.json['server']

    def update_server_name(self, server_id, new_name):

        """Update the name of the server as reported by the API (does not

            modify the hostname used inside the VM)

        :param server_id: integer (str or int)

        :param new_name: (str)

        :returns: (dict) response headers

        """

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

        r = self.servers_put(server_id, json_data=req)

        return r.headers

    def delete_server(self, server_id):

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

        :param server_id: integer (str or int)

        :returns: (dict) response headers

        """

        r = self.servers_delete(server_id)

        return r.headers

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

        """

        :param server_id: integer (str or int)

        :param hard: perform a hard reboot if true, soft reboot otherwise

        """

        boot_type = 'HARD' if hard else 'SOFT'

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

        r = self.servers_post(server_id, 'action', json_data=req)

        return r.headers

    def get_server_metadata(self, server_id, key=''):

        """

        :param server_id: integer (str or int)

        :param key: (str) the metadatum key (all metadata if not given)

        :returns: a key:val dict of requests metadata

        """

        command = path4url('metadata', key)

        r = self.servers_get(server_id, command)

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

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

        """

        :param server_id: integer (str or int)

        :param key: (str)

        :param val: (str)

        :returns: dict of updated key:val metadata

        """

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

        r = self.servers_put(

            server_id, 'metadata/' + key, json_data=req, success=201)

        return r.json['meta']

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

        """

        :param server_id: integer (str or int)

        :param metadata: dict of key:val metadata

        :returns: dict of updated key:val metadata

        """

        req = {'metadata': metadata}

        r = self.servers_post(

            server_id, 'metadata', json_data=req, success=201)

        return r.json['metadata']

    def delete_server_metadata(self, server_id, key):

        """

        :param server_id: integer (str or int)

        :param key: (str) the meta key

        :returns: (dict) response headers

        """

        r = self.servers_delete(server_id, 'metadata/' + key)

        return r.headers

    def list_flavors(self, detail=False):

        """

        :param detail: (bool) detailed flavor info if set, short if not

        :returns: (list) flavor info

        """

        r = self.flavors_get(command='detail' if detail else '')

        return r.json['flavors']

    def get_flavor_details(self, flavor_id):

        """

        :param flavor_id: integer (str or int)

        :returns: dict

        """

        r = self.flavors_get(flavor_id)

        return r.json['flavor']

    def list_images(self, detail=False):

        """

        :param detail: (bool) detailed info if set, short if not

        :returns: dict id,name + full info if detail

        """

        detail = 'detail' if detail else ''

        r = self.images_get(command=detail)

        return r.json['images']

    def get_image_details(self, image_id, **kwargs):

        """

        :param image_id: integer (str or int)

        :returns: dict

        :raises ClientError: 404 if image not available

        """

        r = self.images_get(image_id, **kwargs)

        try:

            return r.json['image']

        except KeyError:

            raise ClientError('Image not available', 404, details=[

                'Image %d not found or not accessible'])

    def delete_image(self, image_id):

        """

        :param image_id: (str)

        """

        r = self.images_delete(image_id)

        return r.headers

    def get_image_metadata(self, image_id, key=''):

        """

        :param image_id: (str)

        :param key: (str) the metadatum key

        :returns (dict) metadata if key not set, specific metadatum otherwise

        """

        command = path4url('metadata', key)

        r = self.images_get(image_id, command)

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

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

        """

        :param image_id: integer (str or int)

        :param key: (str) metadatum key

        :param val: (str) metadatum value

        :returns: (dict) updated metadata

        """

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

        r = self.images_put(image_id, 'metadata/' + key, json_data=req)

        return r.json['meta']

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

        """

        :param image_id: (str)

        :param metadata: dict

        :returns: updated metadata

        """

        req = {'metadata': metadata}

        r = self.images_post(image_id, 'metadata', json_data=req)

        return r.json['metadata']

    def delete_image_metadata(self, image_id, key):

        """

        :param image_id: (str)

        :param key: (str) metadatum key

        :returns: (dict) response headers

        """

        command = path4url('metadata', key)

        r = self.images_delete(image_id, command)

        return r.headers

    def get_floating_ip_pools(self, tenant_id):

        """

        :param tenant_id: (str)

        :returns: (dict) {floating_ip_pools:[{name: ...}, ...]}

        """

        r = self.floating_ip_pools_get(tenant_id)

        return r.json

    def get_floating_ips(self, tenant_id):

        """

        :param tenant_id: (str)

        :returns: (dict) {floating_ips:[

            {fixed_ip: ..., id: ..., instance_id: ..., ip: ..., pool: ...},

            ... ]}

        """

        r = self.floating_ips_get(tenant_id)

        return r.json

    def alloc_floating_ip(self, tenant_id, pool=None):

        """

        :param tenant_id: (str)

        :param pool: (str) pool of ips to allocate from

        :returns: (dict) {

                fixed_ip: ..., id: ..., instance_id: ..., ip: ..., pool: ...

            }

        """

        json_data = dict(pool=pool) if pool else dict()

        r = self.floating_ips_post(tenant_id, json_data)

        return r.json['floating_ip']

    def get_floating_ip(self, tenant_id, fip_id=None):

        """

        :param tenant_id: (str)

        :param fip_id: (str) floating ip id (if None, all ips are returned)

        :returns: (list) [

            {fixed_ip: ..., id: ..., instance_id: ..., ip: ..., pool: ...},

            ... ]

        """

        r = self.floating_ips_get(tenant_id, fip_id)

        return r.json['floating_ips']

    def delete_floating_ip(self, tenant_id, fip_id=None):

        """

        :param tenant_id: (str)

        :param fip_id: (str) floating ip id (if None, all ips are deleted)

        :returns: (dict) request headers

        """

        r = self.floating_ips_delete(tenant_id, fip_id)

        return r.headers