#
#  Copyright (c) 2010 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
#

"""
Common base class(es) for schema and other template views.

$Id$
"""

from datetime import datetime
import time
from zope import component
from zope.app.pagetemplate import ViewPageTemplateFile
from zope.app.session.interfaces import ISession
from zope.cachedescriptors.property import Lazy
from zope.traversing.browser.absoluteurl import absoluteURL

from cybertools.composer.interfaces import IInstance
from cybertools.composer.schema.interfaces import IClientFactory, ISchema
from cybertools.util.format import formatDate


schema_macros = ViewPageTemplateFile('schema_macros.pt')
schema_edit_macros = schema_macros  # default: no editing

packageId = 'cybertools.composer.schema'


class BaseView(object):
    """ Base class for views that have schema objects as their context.

        Do not use this base class for views on typical content objects
        that are not schemas!
    """

    clientName = None

    def __init__(self, context, request):
        self.context = context
        self.request = request

    def getUrlForObject(self, obj):
        from zope.traversing.browser import absoluteURL
        return absoluteURL(obj, self.request)

    def getLanguage(self):
        # TODO: take from request or whatever...
        return 'en'

    def getClientName(self):
        clientName = self.clientName
        if clientName:
            return clientName
        clientName = self.request.form.get('id')
        if clientName:
            self.setSessionInfo('clientName', clientName)
        else:
            clientName = self.getSessionInfo('clientName')
        self.clientName = clientName
        return clientName

    def setClientName(self, clientName):
        self.clientName = clientName
        self.setSessionInfo('clientName', clientName)

    def formatClientInfo(self, data, default=None):
        info = ' '.join((data.get('standard.firstName', ''),
                         data.get('standard.lastName', ''))).strip()
        org = data.get('standard.organization', '')
        info = ', '.join([text for text in (info, org) if text])
        return info or (default is None and data.get('__name__', '???')) or default

    @Lazy
    def manager(self):
        return self.context.getManager()

    @Lazy
    def previousTemplate(self):
        return self.getPreviousTemplate()

    def getPreviousTemplate(self):
        templates = self.context.getManager().getClientSchemas()
        context = self.context
        idx = templates.find(context)
        if idx > 0:
            return self.getUrlForObject(templates[idx-1])
            #return templates.keys()[idx-1]
        else:
            return ''

    @Lazy
    def nextTemplate(self):
        return self.getNextTemplate()

    def getNextTemplate(self):
        templates = self.context.getManager().getClientSchemas()
        context = self.context
        idx = templates.find(context)
        if 0 <= idx < len(templates) - 1:
            #return templates[idx+1].name
            return self.getUrlForObject(templates[idx+1])
            #return templates.keys()[idx+1]
        else:
            return ''

    def getCheckoutView(self):
        manager = self.context.getManager()
        return self.getUrlForObject(manager) + '/checkout.html'

    buttonActions = dict(
            submit_previous=getPreviousTemplate,
            submit_next=getNextTemplate,
            submit=getCheckoutView,
    )

    def getButtonAction(self):
        form = self.request.form
        for bn in self.buttonActions:
            if bn in form:
                return bn
        return None

    @Lazy
    def nextUrl(self):
        return self.getNextUrl()

    def getNextUrl(self):
        #viewName = 'thankyou.html'
        viewName = ''
        url = ''
        bn = self.getButtonAction()
        if bn:
            url = self.buttonActions[bn](self)
        return '%s?id=%s' % (url, self.clientName)
        #return '%s/%s?id=%s' % (self.url, viewName, self.clientName)

    @Lazy
    def url(self):
        from zope.traversing.browser import absoluteURL
        return absoluteURL(self.context, self.request)

    def firstFormUrl(self):
        for tpl in self.context.getClientSchemas():
            return absoluteURL(tpl, self.request)

    def setSessionInfo(self, key, value, packageId=packageId):
        session = ISession(self.request)[packageId]
        if session.get(key) != value:
            session[key] = value

    def getSessionInfo(self, key, default=None, packageId=packageId):
        session = ISession(self.request)[packageId]
        return session.get(key, default)

    def details(self, clientName):
        result = []
        client = self.context.getClients().get(clientName)
        schemas = [s for s in self.context.getClientSchemas()
                     if ISchema.providedBy(s)]
        instance = IInstance(client)
        for s in schemas:
            instance.template = s
            data = instance.applyTemplate()
            for f in s.fields:
                if f.storeData:
                    result.append(dict(label=f.title, value=data.get(f.name)))
        return result

    def getFormattedDate(self, date=None, type='date', variant='medium',
                         adjustTz=False):
        #if date is not None and not isinstance(date, (int, float)):
            #print '***', date, repr(date), date.__class__
            #return '???'
            #date = date.timeTime()
        if adjustTz:
            date = time.gmtime(date)[:6]
        else:
            date = time.localtime(date)[:6]
        date = datetime(*date)
        return formatDate(date, type=type, variant=variant, lang=self.getLanguage())