from zope.interface import implements
from zope.component import queryUtility
from Products.Five import BrowserView
from Products.CMFCore.utils import getToolByName
from plone.i18n.normalizer.interfaces import IIDNormalizer
from Products.PlonePAS.interfaces.browser import IPASSearchView


class PASSearchView(BrowserView):
    implements(IPASSearchView)

    @staticmethod
    def extractCriteriaFromRequest(request):
        criteria = request.form.copy()

        for key in ["form.submitted", "submit", 'b_start', 'b_size']:
            if key in criteria:
                del criteria[key]

        for (key, value) in criteria.items():
            if not value:
                del criteria[key]

        return criteria

    @staticmethod
    def merge(results, key):
        output = {}
        for entry in results:
            id = entry[key]
            if id not in output:
                output[id] = entry.copy()
            else:
                buf = entry.copy()
                buf.update(output[id])
                output[id] = buf

        return output.values()

    def sort(self, results, sort_key):
        idnormalizer = queryUtility(IIDNormalizer)

        def key_func(a):
            return idnormalizer.normalize(a.get(sort_key, a))
        return sorted(results, key=key_func)

    def searchUsers(self, sort_by=None, **criteria):
        self.pas = getToolByName(self.context, "acl_users")
        results = self.merge(self.pas.searchUsers(**criteria), "userid")
        if sort_by is not None:
            results = self.sort(results, sort_by)
        return results

    def searchUsersByRequest(self, request, sort_by=None):
        criteria = self.extractCriteriaFromRequest(request)
        return self.searchUsers(sort_by=sort_by, **criteria)

    def searchGroups(self, sort_by=None, **criteria):
        self.pas = getToolByName(self.context, "acl_users")
        results = self.merge(self.pas.searchGroups(**criteria), "groupid")
        if sort_by is not None:
            results = self.sort(results, sort_by)
        return results

    def searchGroupsByRequest(self, request):
        criteria = self.extractCriteriaFromRequest(request)
        return self.searchGroups(**criteria)

    def getPhysicalPath(self):
        # We call various PAS methods which can be ZCached. The ZCache
        # infrastructure relies on getPhysicalPath on the context being
        # available, which this view does not have, it not being a
        # persistent object. So we fake things and return the physical path
        # for our context.
        return self.context.getPhysicalPath()
