"""UI components for accesscodes.
"""
import grok
from datetime import datetime
from waeup.sirp.browser import WAeUPPage, WAeUPAddFormPage
from waeup.sirp.browser.breadcrumbs import Breadcrumb
from waeup.sirp.browser.pages import UniversityPage
from waeup.sirp.browser.viewlets import AdminTask, AddActionButton, LeftSidebar
from waeup.sirp.interfaces import IWAeUPObject, IUniversity

from waeup.sirp.accesscodes.accesscodes import AccessCodeBatch
from waeup.sirp.accesscodes.catalog import invalidated_num
from waeup.sirp.accesscodes.interfaces import (
    IAccessCodeBatchContainer, IAccessCodeBatch,
    )

grok.context(IWAeUPObject)

class BatchContainerPage(WAeUPPage):
    grok.name('index')
    grok.context(IAccessCodeBatchContainer)
    grok.template('batchcontainer')
    grok.require('waeup.manageACBatches')

    title = 'Access Code Batches'
    pnav = 0

    def invalidated(self, batch):
        return invalidated_num(batch.prefix, batch.num)


class AddBatchPage(WAeUPAddFormPage):
    grok.name('add')
    grok.context(IAccessCodeBatchContainer)
    grok.require('waeup.manageACBatches')

    title = label = 'Create a WAeUP Scratch Card Batch'
    pnav = 0

    form_fields = grok.AutoFields(IAccessCodeBatch).select(
        'batch_prefix', 'entry_num', 'cost')

    @grok.action('Cancel')
    def cancel(self, *args, **kw):
        self.flash('Batch creation cancelled.')
        self.redirect(self.url(self.context))

    @grok.action('Create batch')
    def createBatch(self, **data):
        creator = self.request.principal.id
        creation_date = datetime.now()
        data.update(creation_date=creation_date, creator=creator)
        batch = AccessCodeBatch(**data)
        self.context.addBatch(batch)
        self.context._p_changed = True
        self.flash('Batch created (%s entries)' % data['entry_num'])
        self.redirect(self.url(self.context))

class BatchContainerBreadcrumb(Breadcrumb):
    """A breadcrumb for ac batch containers.
    """
    grok.require('waeup.manageACBatches')
    grok.context(IAccessCodeBatchContainer)
    title = u'Access Code Batches'
    parent_viewname = 'administration'

class AdminTaskManageACBatches(AdminTask):
    """Entry on administration page that links to batch container.
    """
    grok.order(5)
    grok.require('waeup.manageACBatches')
    grok.template('admintaskacbatches')

    link_title = 'Manage access-code batches'
    target_viewname = 'accesscodes'

class CreateBatchButton(AddActionButton):
    """Action button on batch container page which links to batch creation.
    """
    grok.context(IAccessCodeBatchContainer)
    grok.view(BatchContainerPage)
    grok.require('waeup.manageACBatches')
    text = 'Add Scratch Card Batch'

class ManageAccessCodes(grok.Viewlet):
    """Link on front page to access code management.
    """
    grok.viewletmanager(LeftSidebar)
    grok.context(IUniversity)
    grok.view(UniversityPage)
    grok.order(6)
    grok.require('waeup.manageACBatches')

    def render(self):
        return u'<div class="portlet"><a href="accesscodes">Manage access-codes</a></div>'