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##############################################################################
#
# Copyright (c) 2002 Nexedi SARL and Contributors. All Rights Reserved.
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#                    Jean-Paul Smets-Solanes <jp@nexedi.com>
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#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsability of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# garantees and support are strongly adviced to contract a Free Software
# Service Company
#
# 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.
#
##############################################################################

from Products.Formulator.Form import Form, BasicForm, ZMIForm
from Products.Formulator.Form import manage_addForm, manage_add, initializeForm
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from Products.Formulator.Errors import FormValidationError, ValidationError
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from Products.Formulator.DummyField import fields
from Products.Formulator.XMLToForm import XMLToForm
from Products.PageTemplates.ZopePageTemplate import ZopePageTemplate
from Products.ERP5Type import PropertySheet

from urllib import quote
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from Globals import InitializeClass, PersistentMapping, DTMLFile, get_request
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from AccessControl import Unauthorized, getSecurityManager, ClassSecurityInfo
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from ZODB.POSException import ConflictError
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from Products.PageTemplates.Expressions import SecureModuleImporter
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from Products.ERP5Type.Utils import UpperCase

import psyco
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import sys
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# Patch the fiels methods to provide improved namespace handling

from Products.Formulator.Field import Field

from zLOG import LOG

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def get_value(self, id, **kw):
    """Get value for id."""
    # FIXME: backwards compat hack to make sure tales dict exists
    if not hasattr(self, 'tales'):
        self.tales = {}
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    tales_expr = self.tales.get(id, "")
    if tales_expr:
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        REQUEST = get_request()
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        form = self.aq_parent # XXX (JPS) form for default is wrong apparently in listbox - double check
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        object = getattr(form, 'aq_parent', None)
        if object:
            # NEEDS TO BE CHECKED
            # container = object.aq_inner.aq_parent ORIGINAL VERSION - not so good ?
            container = object.aq_parent
            #container = object.getParentNode()
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        else:
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            container = None
        kw['field'] = self
        kw['form'] = form
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        kw['request'] = REQUEST
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        kw['here'] = object
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        kw['modules'] = SecureModuleImporter
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        kw['container'] = container
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        try :
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            kw['preferences'] = object.getPortalObject().portal_preferences
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        except AttributeError :
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            LOG('ERP5Form', 0,
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              'portal_preferences not put in TALES context (not installed?)')
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        extra_context = REQUEST.other.get('erp5_extra_context', None)
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        if extra_context:
          kw.update(extra_context)
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        # This allows to pass some pointer to the local object
        # through the REQUEST parameter. Not very clean.
        # Used by ListBox to render different items in a list
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        if kw.has_key('REQUEST') and not kw.get('cell'):
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          if getattr(kw['REQUEST'],'cell',None) is not None:
            kw['cell'] = getattr(kw['REQUEST'],'cell')
          else:
            kw['cell'] = kw['REQUEST']
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        elif not kw.get('cell'):
          if getattr(REQUEST,'cell',None) is not None:
            kw['cell'] = getattr(REQUEST,'cell')
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        try:
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            value = tales_expr.__of__(self)(**kw)
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        except (ConflictError, RuntimeError):
            raise
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        except:
            # We add this safety exception to make sure we always get
            # something reasonable rather than generate plenty of errors
            LOG('ERP5Form.get_value ( %s/%s [%s]), exception on tales_expr: '%(
                self.aq_parent.getId(), self.getId(), id) ,0,'', error=sys.exc_info())
            value = self.get_orig_value(id)
    else:
        # FIXME: backwards compat hack to make sure overrides dict exists
        if not hasattr(self, 'overrides'):
            self.overrides = {}
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        override = self.overrides.get(id, "")
        if override:
            # call wrapped method to get answer
            value = override.__of__(self)()
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        else:
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            # get normal value
            value = self.get_orig_value(id)
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            # For the 'default' value, we try to get a default value
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            if id == 'default':
                if (value is None or value == '' or value == [] or value == ()) \
                       and self.meta_type != 'MethodField' :
                  # If nothing was provided then try to
                  # find a default method to get the value
                  # for that field
                  # NEEDS TO BE CLEANED UP
                  try:
                    form = self.aq_parent
                    object = getattr(form, 'aq_parent', None)
                    key = self.id
                    key = key[3:]
                    value = object.getProperty(key, d=value)
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                  except (KeyError, AttributeError):
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                    value = None
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            # For the 'editable' value, we try to get a default value
            elif id == 'editable':
                # By default, pages are editable and
                # fields are editable if they are set to editable mode
                # However, if the REQUEST defines editable_mode to 0
                # then all fields become read only.
                # This is useful to render ERP5 content as in a web site (ECommerce)
                # editable_mode should be set for example by the page template
                # which defines the current layout
                if kw.has_key('REQUEST'):
                  if not getattr(kw['REQUEST'], 'editable_mode', 1):
                    value = 0
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    # if normal value is a callable itself, wrap it
    if callable(value):
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        value = value.__of__(self)
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        #value=value() # Mising call ??? XXX Make sure compatible with listbox methods

    if id == 'default':
        if self.meta_type != 'DateTimeField':
          # We make sure we convert values to empty strings
          # for most fields (so that we do not get a 'value'
          # message on screeen)
          # This can be overriden by useing TALES in the field
          if value is None: value = ''
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    return value

psyco.bind(get_value)

def om_icons(self):
    """Return a list of icon URLs to be displayed by an ObjectManager"""
    icons = ({'path': self.icon,
              'alt': self.meta_type, 'title': self.meta_type},)
    return icons


def _get_default(self, key, value, REQUEST):
    if value is not None:
        return value
    try:
        value = REQUEST.form[key]
    except (KeyError, AttributeError):
        # fall back on default
        return self.get_value('default',REQUEST=REQUEST) # It was missing on Formulator
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    # if we enter a string value while the field expects unicode,
    # convert to unicode first
    # this solves a problem when re-rendering a sticky form with
    # values from request
    if (self.has_value('unicode') and self.get_value('unicode') and
        type(value) == type('')):
        return unicode(value, self.get_form_encoding())
    else:
        return value
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# Dynamic Patch
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Field.get_value = get_value
Field._get_default = _get_default
Field.om_icons = om_icons
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# Constructors

manage_addForm = DTMLFile("dtml/form_add", globals())

def addERP5Form(self, id, title="", REQUEST=None):
    """Add form to folder.
    id     -- the id of the new form to add
    title  -- the title of the form to add
    Result -- empty string
    """
    # add actual object
    id = self._setObject(id, ERP5Form(id, title))
    # respond to the add_and_edit button if necessary
    add_and_edit(self, id, REQUEST)
    return ''

def add_and_edit(self, id, REQUEST):
    """Helper method to point to the object's management screen if
    'Add and Edit' button is pressed.
    id -- id of the object we just added
    """
    if REQUEST is None:
        return
    try:
        u = self.DestinationURL()
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    except AttributeError:
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        u = REQUEST['URL1']
    if REQUEST['submit'] == " Add and Edit ":
        u = "%s/%s" % (u, quote(id))
    REQUEST.RESPONSE.redirect(u+'/manage_main')

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def initializeForm(field_registry, form_class=None):
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    """Sets up ZMIForm with fields from field_registry.
    """
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    if form_class is None: form_class = ERP5Form
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    meta_types = []
    for meta_type, field in field_registry.get_field_classes().items():
        # don't set up in form if this is a field for internal use only
        if field.internal_field:
            continue

        # set up individual add dictionaries for meta_types
        dict = { 'name': field.meta_type,
                 'action':
                 'manage_addProduct/Formulator/manage_add%sForm' % meta_type }
        meta_types.append(dict)
        # set up add method
        setattr(form_class,
                'manage_add%sForm' % meta_type,
                DTMLFile('dtml/fieldAdd', globals(), fieldname=meta_type))

    # set up meta_types that can be added to form
    form_class._meta_types = tuple(meta_types)

    # set up settings form
    form_class.settings_form._realize_fields()

# Special Settings

def create_settings_form():
    """Create settings form for ZMIForm.
    """
    form = BasicForm('manage_settings')

    title = fields.StringField('title',
                               title="Title",
                               required=0,
                               default="")
    row_length = fields.IntegerField('row_length',
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                                     title='Number of groups in row (in order tab)',
                                     required=1,
                                     default=4)
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    name = fields.StringField('name',
                              title="Form name",
                              required=0,
                              default="")
    pt = fields.StringField('pt',
                              title="Page Template",
                              required=0,
                              default="")
    action = fields.StringField('action',
                                title='Form action',
                                required=0,
                                default="")
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    update_action = fields.StringField('update_action',
                                title='Form update action',
                                required=0,
                                default="")
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    method = fields.ListField('method',
                              title='Form method',
                              items=[('POST', 'POST'),
                                     ('GET', 'GET')],
                              required=1,
                              size=1,
                              default='POST')
    enctype = fields.ListField('enctype',
                               title='Form enctype',
                               items=[('No enctype', ""),
                                      ('application/x-www-form-urlencoded',
                                       'application/x-www-form-urlencoded'),
                                      ('multipart/form-data',
                                       'multipart/form-data')],
                               required=0,
                               size=1,
                               default=None)
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    encoding = fields.StringField('encoding',
                                  title='Encoding of pages the form is in',
                                  default="UTF-8",
                                  required=1)
    stored_encoding = fields.StringField('stored_encoding',
                                      title='Encoding of form properties',
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                                      default='UTF-8',
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                                      required=1)
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    unicode_mode = fields.CheckBoxField('unicode_mode',
                                        title='Form properties are unicode',
                                        default=0,
                                        required=1)

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    form.add_fields([title, row_length, name, pt, action, update_action, method,
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                     enctype, encoding, stored_encoding, unicode_mode])
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    return form

class ERP5Form(ZMIForm, ZopePageTemplate):
    """
        A Formulator form with a built-in rendering parameter based
        on page templates or DTML.
    """
    meta_type = "ERP5 Form"
    icon = "www/Form.png"

    # Declarative Security
    security = ClassSecurityInfo()

    # Declarative properties
    property_sheets = ( PropertySheet.Base
                      , PropertySheet.SimpleItem)

    # Constructors
    constructors =   (manage_addForm, addERP5Form)

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    # This is a patched dtml formOrder
    security.declareProtected('View management screens', 'formOrder')
    formOrder = DTMLFile('dtml/formOrder', globals())

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    # Default Attributes
    pt = 'form_view'
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    update_action = ''
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    # Special Settings
    settings_form = create_settings_form()

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    def __init__(self, id, title, unicode_mode=0, encoding='UTF-8',
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                 stored_encoding='UTF-8'):
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        """Initialize form.
        id    -- id of form
        title -- the title of the form
        """
        ZMIForm.inheritedAttribute('__init__')(self, "", "POST", "", id,
                                               encoding, stored_encoding,
                                               unicode_mode)
        self.id = id
        self.title = title
        self.row_length = 4

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    # Proxy method to PageTemplate
    def __call__(self, *args, **kwargs):
        if not kwargs.has_key('args'):
            kwargs['args'] = args
        form = self
        object = getattr(form, 'aq_parent', None)
        if object:
          container = object.aq_inner.aq_parent
        else:
          container = None
        pt = getattr(self,self.pt)
        extra_context = self.pt_getContext()
        extra_context['options'] = kwargs
        extra_context['form'] = self
        extra_context['container'] = container ## PROBLEM NOT TAKEN INTO ACCOUNT
        extra_context['here'] = object
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        # We initialize here an index which is used to generate
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        # different method ids for every field
        request = extra_context['request']
        # XXX We must not use a counter, but a ID for each field
        request.set('_v_relation_field_index', 0)
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        return pt.pt_render(extra_context=extra_context)

    def _exec(self, bound_names, args, kw):
        pt = getattr(self,self.pt)
        return pt._exec(self, bound_names, args, kw)

    # Utilities
    def ErrorFields(self, validation_errors):
        """
            Create a dictionnary of validation_errors
            with field id as key
        """
        ef = {}
        for e in validation_errors.errors:
            ef[e.field_id] = e
        return ef

    def om_icons(self):
        """Return a list of icon URLs to be displayed by an ObjectManager"""
        icons = ({'path': 'misc_/ERP5Form/Form.png',
                  'alt': self.meta_type, 'title': self.meta_type},)
        return icons

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    # Pached validate_all to support ListBox validation
    security.declareProtected('View', 'validate_all')
    def validate_all(self, REQUEST):
        """Validate all enabled fields in this form, catch any ValidationErrors
        if they occur and raise a FormValidationError in the end if any
        Validation Errors occured.
        """
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#        import pdb; pdb.set_trace()
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        result = {}
        errors = []
        for field in self.get_fields():
            # skip any field we don't need to validate
            if not field.need_validate(REQUEST):
                continue
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            if not (field.get_value('editable',REQUEST=REQUEST)):
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                continue
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            try:
                value = field.validate(REQUEST)
                # store under id
                result[field.id] = value
                # store as alternate name as well if necessary
                alternate_name = field.get_value('alternate_name')
                if alternate_name:
                    result[alternate_name] = value
            except FormValidationError, e: # XXX JPS Patch for listbox
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                #LOG('validate_all', 0, 'FormValidationError: field = %s, errors=%s' % (repr(field), repr(errors)))
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                errors.extend(e.errors)
                result.update(e.result)
            except ValidationError, err:
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                #LOG('validate_all', 0, 'ValidationError: field.id = %s, err=%s' % (repr(field.id), repr(err)))
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                errors.append(err)
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            except KeyError, err:
                LOG('ERP5Form/Form.py:validate_all', 0, 'KeyError : %s' % (err, ))
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        if len(errors) > 0:
            raise FormValidationError(errors, result)
        return result

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    # FTP/DAV Access
    manage_FTPget = ZMIForm.get_xml

    def PUT(self, REQUEST, RESPONSE):
        """Handle HTTP PUT requests."""
        self.dav__init(REQUEST, RESPONSE)
        self.dav__simpleifhandler(REQUEST, RESPONSE, refresh=1)
        body=REQUEST.get('BODY', '')
        # Empty the form (XMLToForm is unable to empty things before reopening)
        for k in self.get_field_ids():
          try:
            self._delObject(k)
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          except AttributeError:
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            pass
        self.groups = {}
        self.group_list = []
        # And reimport
        XMLToForm(body, self)
        self.ZCacheable_invalidate()
        RESPONSE.setStatus(204)
        return RESPONSE

    manage_FTPput = PUT

    psyco.bind(__call__)
    psyco.bind(_exec)

# More optimizations
#psyco.bind(ERP5Field)
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# XXX Not useful, as we patch those methods in FormulatorPatch
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psyco.bind(Field.render)
psyco.bind(Field._render_helper)
psyco.bind(Field.get_value)

#from Products.PageTemplates.PageTemplate import PageTemplate
#from TAL import TALInterpreter
#psyco.bind(TALInterpreter.TALInterpreter)
#psyco.bind(TALInterpreter.TALInterpreter.interpret)
#psyco.bind(PageTemplate.pt_render)
#psyco.bind(PageTemplate.pt_macros)

#from Products.CMFCore.ActionsTool import ActionsTool
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#psyco.bind(ActionsTool.listFilteredActionsFor)