#
#  Copyright (c) 2012 Helmut Merz helmutm@cy55.de
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

"""
Views and actions for states management.
"""

from zope import component
from zope.app.pagetemplate import ViewPageTemplateFile
from zope.cachedescriptors.property import Lazy
from zope.i18n import translate

from cybertools.browser.action import Action, actions
from cybertools.stateful.interfaces import IStateful, IStatesDefinition
from loops.browser.common import BaseView
from loops.browser.concept import ConceptView
from loops.expert.query import And, Or, State, Type, getObjects
from loops.expert.browser.search import search_template
from loops.security.common import checkPermission
from loops.util import _


template = ViewPageTemplateFile('view_macros.pt')

statefulActions = ('classification_quality',
                   'simple_publishing',
                   'task_states',
                   'publishable_task',)


def registerStatesPortlet(controller, view, statesDefs,
                          region='portlet_right', priority=98):
    cm = controller.macros
    stfs = [component.getAdapter(view.context, IStateful, name=std) 
                for std in statesDefs]
    cm.register(region, 'states', title=_(u'States'),
                subMacro=template.macros['portlet_states'],
                priority=priority, info=view, stfs=stfs)


class StateAction(Action):

    url = None
    definition = None

    @Lazy
    def stateful(self):
        return component.getAdapter(self.view.context, IStateful,
                                    name=self.definition)

    @Lazy
    def description(self):
        lang = self.view.languageInfo.language
        definition = translate(_(self.definition), target_language=lang)
        title = translate(_(self.stateObject.title), target_language=lang)
        return _(u'State information for $definition: $title',
                 mapping=dict(definition=definition, title=title))

    @Lazy
    def stateObject(self):
        return self.stateful.getStateObject()

    @Lazy
    def icon(self):
        icon = self.stateObject.icon or 'led%s.png' % self.stateObject.color
        return 'cybertools.icons/' + icon


for std in statefulActions:
    actions.register('state.' + std, 'object', StateAction,
            definition = std,
            cssClass='icon-action',
    )


#class StateQuery(ConceptView):
class StateQuery(BaseView):

    template = template

    form_action = 'execute_search_action'

    @Lazy
    def search_macros(self):
        return search_template.macros

    @Lazy
    def macro(self):
        return self.template.macros['query']

    @Lazy
    def rcStatesDefinitions(self):
        result = {}
        result['resource'] = [component.getUtility(IStatesDefinition, name=n)
                for n in self.globalOptions('organize.stateful.resource', ())]
        result['concept'] = [component.getUtility(IStatesDefinition, name=n)
                for n in self.globalOptions('organize.stateful.concept', ())]
        return result

    @Lazy
    def statesDefinitions(self):
        # TODO: extend to handle concept states as well
        return [component.getUtility(IStatesDefinition, name=n)
                    for n in self.globalOptions('organize.stateful.resource', ())]

    @Lazy
    def selectedStates(self):
        result = {}
        for k, v in self.request.form.items():
            if k.startswith('state.') and v:
                result[k] = v
        return result

    @Lazy
    def showActions(self):
        return checkPermission('loops.ManageSite', self.context)

    @Lazy
    def results(self):
        conceptCriteria = {}
        resourceCriteria = {}
        q = None
        for k, v in self.selectedStates.items():
            k = k[len('state.'):]
            type, statesDef = k.split('.')
            if type == 'concept':
                conceptCriteria[statesDef] = v
            elif type == 'resource':
                resourceCriteria[statesDef] = v
        if conceptCriteria:
            conceptQuery = And(Type('loops:concept:*'),
                               *[State(c, v) for c, v in conceptCriteria.items()])
        if resourceCriteria:
            resourceQuery = And(Type('loops:resource:*'),
                               *[State(c, v) for c, v in resourceCriteria.items()])
            if conceptCriteria:
                q = Or(conceptQuery, resourceQuery)
            else:
                q = resourceQuery
        elif conceptCriteria:
            q = conceptQuery
        if q is not None:
            uids = q.apply()
            return self.viewIterator(getObjects(uids, self.loopsRoot))
        return []


class FilterAllStates(BaseView):

    @Lazy
    def macros(self):
        return template.macros

    @Lazy
    def macro(self):
        return self.macros['filter_allstates']