#!/usr/bin/python2.5
#
# Copyright 2008 the Melange authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Views for Documents.
"""

__authors__ = [
    '"Sverre Rabbelier" <sverre@rabbelier.nl>',
    '"Lennard de Rijk" <ljvderijk@gmail.com>',
    '"Pawel Solyga" <pawel.solyga@gmail.com>',
  ]


from google.appengine.api import users

from django import forms

from soc.logic import dicts
from soc.logic import validate
from soc.logic.models import user as user_logic
from soc.views import helper
from soc.views.helper import access
from soc.views.helper import redirects
from soc.views.models import base

import soc.models.document
import soc.logic.models.document
import soc.logic.dicts
import soc.views.helper
import soc.views.helper.widgets


class CreateForm(helper.forms.BaseForm):
  """Django form displayed when Developer creates a Document.
  """

  content = forms.fields.CharField(widget=helper.widgets.TinyMCE(
      attrs={'rows':10, 'cols':40}))

  class Meta:
    """Inner Meta class that defines some behavior for the form.
    """
    model = soc.models.document.Document

    #: list of model fields which will *not* be gathered by the form
    exclude = ['author', 'created', 'modified_by', 'modified', 'scope']

  def clean_scope_path(self):
    scope_path = self.cleaned_data.get('scope_path')
    # TODO(tlarsen): combine path and link_id and check for uniqueness
    if not validate.isScopePathFormatValid(scope_path):
      raise forms.ValidationError("This scope path is in wrong format.")
    return scope_path

  def clean_link_id(self):
    link_id = self.cleaned_data.get('link_id').lower()
    # TODO(tlarsen): combine path and link_id and check for uniqueness
    if not validate.isLinkIdFormatValid(link_id):
      raise forms.ValidationError("This link ID is in wrong format.")
    return link_id


class EditForm(CreateForm):
  """Django form displayed a Document is edited.
  """

  doc_key_name = forms.fields.CharField(widget=forms.HiddenInput)
  created_by = forms.fields.CharField(widget=helper.widgets.ReadOnlyInput(),
                                      required=False)
  last_modified_by = forms.fields.CharField(
      widget=helper.widgets.ReadOnlyInput(), required=False)


class View(base.View):
  """View methods for the Document model.
  """

  def __init__(self, params=None):
    """Defines the fields and methods required for the base View class
    to provide the user with list, public, create, edit and delete views.

    Params:
      params: a dict with params for this View
    """

    rights = {}
    rights['any_access'] = [access.allow]
    rights['show'] = [access.checkIsDocumentPublic]

    new_params = {}
    new_params['logic'] = soc.logic.models.document.logic
    new_params['rights'] = rights

    new_params['name'] = "Document"

    new_params['edit_form'] = EditForm
    new_params['create_form'] = CreateForm

    params = dicts.merge(params, new_params)

    super(View, self).__init__(params=params)

  def _editPost(self, request, entity, fields):
    """See base.View._editPost().
    """

    account = users.get_current_user()
    user = user_logic.logic.getForFields({'account': account}, unique=True)

    if not entity:
      fields['author'] = user
    else:
      fields['author'] = entity.author

    fields['modified_by'] = user

    super(View, self)._editPost(request, entity, fields)

  def _editGet(self, request, entity, form):
    """See base.View._editGet().
    """

    form.fields['created_by'].initial = entity.author.name
    form.fields['last_modified_by'].initial = entity.modified_by.name
    form.fields['doc_key_name'].initial = entity.key().name()

    super(View, self)._editGet(request, entity, form)

  def getMenusForScope(self, entity, params):
    """Returns the featured menu items for one specifc entity.

    A link to the home page of the specified entity is also included.

    Args:
      entity: the entity for which the entry should be constructed
      params: a dict with params for this View.
    """

    filter = {
        'scope_path': entity.key().name(),
        'is_featured': True,
        }

    entities = self._logic.getForFields(filter)

    submenus = []

    # add a link to the home page
    submenu = (redirects.getPublicRedirect(entity, params), "Home", 'show')
    submenus.append(submenu)

    # add a link to all featured documents
    for entity in entities:
      submenu = (redirects.getPublicRedirect(entity, self._params),
                 entity.short_name, 'show')
      submenus.append(submenu)

    return submenus

view = View()

create = view.create
edit = view.edit
delete = view.delete
list = view.list
public = view.public