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# Copyright 2011, 2012, 2013 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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#   1. Redistributions of source code must retain the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer.
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#
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#   2. Redistributions in binary form must reproduce the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer in the documentation and/or other materials
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#      provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from logging import getLogger
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from django.conf.urls import patterns
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from django.http import HttpResponse
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from django.template.loader import render_to_string
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from django.utils import simplejson as json
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from snf_django.lib import api
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from synnefo.api import util
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from synnefo.db.models import Flavor
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log = getLogger('synnefo.api')
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urlpatterns = patterns(
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    'synnefo.api.flavors',
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    (r'^(?:/|.json|.xml)?$', 'list_flavors'),
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    (r'^/detail(?:.json|.xml)?$', 'list_flavors', {'detail': True}),
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    (r'^/(\d+)(?:.json|.xml)?$', 'get_flavor_details'),
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)
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def flavor_to_dict(flavor, detail=True):
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    d = {'id': flavor.id, 'name': flavor.name}
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    d['links'] = util.flavor_to_links(flavor.id)
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    if detail:
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        d['ram'] = flavor.ram
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        d['disk'] = flavor.disk
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        d['vcpus'] = flavor.cpu
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        d['SNF:disk_template'] = flavor.disk_template
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    return d
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@api.api_method(http_method='GET', user_required=True, logger=log)
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def list_flavors(request, detail=False):
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    # Normal Response Codes: 200, 203
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    # Error Response Codes: computeFault (400, 500),
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    #                       serviceUnavailable (503),
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    #                       unauthorized (401),
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    #                       badRequest (400),
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    #                       overLimit (413)
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    log.debug('list_flavors detail=%s', detail)
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    active_flavors = Flavor.objects.exclude(deleted=True)
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    flavors = [flavor_to_dict(flavor, detail)
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               for flavor in active_flavors.order_by('id')]
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    if request.serialization == 'xml':
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        data = render_to_string('list_flavors.xml', {
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            'flavors': flavors,
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            'detail': detail})
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    else:
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        data = json.dumps({'flavors': flavors})
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    return HttpResponse(data, status=200)
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@api.api_method(http_method='GET', user_required=True, logger=log)
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def get_flavor_details(request, flavor_id):
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    # Normal Response Codes: 200, 203
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    # Error Response Codes: computeFault (400, 500),
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    #                       serviceUnavailable (503),
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    #                       unauthorized (401),
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    #                       badRequest (400),
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    #                       itemNotFound (404),
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    #                       overLimit (413)
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    log.debug('get_flavor_details %s', flavor_id)
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    flavor = util.get_flavor(flavor_id, include_deleted=True)
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    flavordict = flavor_to_dict(flavor, detail=True)
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    if request.serialization == 'xml':
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        data = render_to_string('flavor.xml', {'flavor': flavordict})
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    else:
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        data = json.dumps({'flavor': flavordict})
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    return HttpResponse(data, status=200)