import grok
from zope.component.interfaces import IFactory
from zope.interface import implementedBy
from waeup.sirp.interfaces import IWAeUPSIRPPluggable
from waeup.sirp.university.interfaces import IFacultyContainer, IFaculty

class FacultyContainer(grok.Container):
    """See interfaces for description.
    """
    grok.implements(IFacultyContainer)
    grok.require('waeup.manageUniversity')

    def addFaculty(self, faculty):
        if not IFaculty.providedBy(faculty):
            raise TypeError('FacultyContainers contain only IFaculty instances')
        self[faculty.code] = faculty
        return

    def clear(self):
        keys = self.keys()
        for key in keys:
            del self[key]

class FacultyContainerFactory(grok.GlobalUtility):
    """A factory for faculty containers.
    """
    grok.implements(IFactory)
    grok.name(u'waeup.FacultyContainer')
    title = u"Create a new faculty container.",
    description = u"This factory instantiates new faculty containers."

    def __call__(self, *args, **kw):
        return FacultyContainer(*args, **kw)

    def getInterfaces(self):
        return implementedBy(FacultyContainer)

class AcademicsPlugin(grok.GlobalUtility):
    """A plugin that creates a faculty container inside a university.
    """
    grok.implements(IWAeUPSIRPPluggable)
    grok.name('faculties')

    def setup(self, site, name, logger):
        if 'faculties' in site.keys():
            logger.warn('Could not create faculty container in WAeUP SIRP.')
            return
        site['faculties'] = FacultyContainer()
        logger.info('Created faculty container for University')
        return

    def update(self, site, name, logger):
        if not 'faculties' in site.keys():
            self.setup(site, name, logger)