#!/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 Organizations.
"""

__authors__ = [
    '"Augie Fackler" <durin42@gmail.com>',
    '"Sverre Rabbelier" <sverre@rabbelier.nl>',
    '"Lennard de Rijk" <ljvderijk@gmail.com>',
  ]


import itertools

from django import forms
from django.utils.translation import ugettext

from soc.logic import cleaning
from soc.logic import dicts
from soc.logic import accounts
from soc.logic.helper import timeline as timeline_helper
from soc.logic.models import mentor as mentor_logic
from soc.logic.models import organization as org_logic
from soc.logic.models import org_admin as org_admin_logic
from soc.logic.models import org_app as org_app_logic
from soc.logic.models import user as user_logic
from soc.views import helper
from soc.views import out_of_band
from soc.views.helper import access
from soc.views.helper import decorators
from soc.views.helper import dynaform
from soc.views.helper import lists
from soc.views.helper import redirects
from soc.views.helper import widgets
from soc.views.models import group

import soc.models.organization
import soc.logic.models.organization

class View(group.View):
  """View methods for the Organization model.
  """

  DEF_ACCEPTED_PROJECTS_MSG_FMT = ugettext("These projects have"
      " been accepted into %s. You can learn more about"
      " each project by visiting the links below.")

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

    from soc.views.models import program as program_view

    rights = access.Checker(params)
    rights['any_access'] = ['allow']
    rights['show'] = ['allow']
    rights['create'] = ['checkIsDeveloper']
    rights['edit'] = [('checkHasActiveRoleForKeyFieldsAsScope',
                           org_admin_logic.logic,),
                      ('checkGroupIsActiveForLinkId', org_logic.logic)]
    rights['delete'] = ['checkIsDeveloper']
    rights['home'] = ['allow']
    rights['public_list'] = ['allow']
    rights['apply_mentor'] = ['checkIsUser']
    rights['list_requests'] = [('checkHasActiveRoleForKeyFieldsAsScope',
                                org_admin_logic.logic)]
    rights['list_roles'] = [('checkHasActiveRoleForKeyFieldsAsScope',
                             org_admin_logic.logic)]
    rights['applicant'] = [('checkIsApplicationAccepted',
                            org_app_logic.logic)]
    rights['list_proposals'] = [('checkHasAny', [
        [('checkHasActiveRoleForKeyFieldsAsScope', [org_admin_logic.logic]),
         ('checkHasActiveRoleForKeyFieldsAsScope', [mentor_logic.logic])]
        ])]

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

    new_params['scope_view'] = program_view
    new_params['scope_redirect'] = redirects.getCreateRedirect

    new_params['name'] = "Organization"
    new_params['url_name'] = "org"
    new_params['document_prefix'] = "org"
    new_params['sidebar_grouping'] = 'Organizations'

    new_params['public_template'] = 'soc/organization/public.html'
    new_params['list_row'] = 'soc/organization/list/row.html'
    new_params['list_heading'] = 'soc/organization/list/heading.html'
    new_params['home_template'] = 'soc/organization/home.html'

    new_params['application_logic'] = org_app_logic
    new_params['group_applicant_url'] = True
    new_params['sans_link_id_public_list'] = True

    new_params['extra_dynaexclude'] = ['slots', 'slots_calculated',
                                       'nr_applications', 'nr_mentors']

    patterns = []

    patterns += [
        (r'^%(url_name)s/(?P<access_type>apply_mentor)/%(scope)s$',
        'soc.views.models.%(module_name)s.apply_mentor',
        "List of all %(name_plural)s you can apply to"),
        (r'^%(url_name)s/(?P<access_type>list_proposals)/%(key_fields)s$',
        'soc.views.models.%(module_name)s.list_proposals',
        "List of all Student Proposals for this %(name)s"),
        ]

    new_params['extra_django_patterns'] = patterns

    new_params['create_dynafields'] = [
        {'name': 'link_id',
         'base': forms.fields.CharField,
         'label': 'Organization Link ID',
         },
        ]

    new_params['create_extra_dynaproperties'] = {
        'scope_path': forms.CharField(widget=forms.HiddenInput,
                                   required=True),
        'description': forms.fields.CharField(
            widget=helper.widgets.FullTinyMCE(
                attrs={'rows': 25, 'cols': 100})),
        'contrib_template': forms.fields.CharField(
            widget=helper.widgets.FullTinyMCE(
                attrs={'rows': 25, 'cols': 100})),
        'clean_description': cleaning.clean_html_content('description'),
        'clean_contrib_template': cleaning.clean_html_content(
            'contrib_template'),
        'clean_ideas': cleaning.clean_url('ideas'),
        'clean': cleaning.validate_new_group('link_id', 'scope_path',
            soc.logic.models.organization, org_app_logic)
        }

    new_params['edit_extra_dynaproperties'] = {
        'clean': cleaning.clean_refs(new_params, ['home_link_id'])
        }

    params = dicts.merge(params, new_params)

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

    # create and store the special form for applicants
    updated_fields = {
        'link_id': forms.CharField(widget=widgets.ReadOnlyInput(),
            required=False),
        'clean_link_id': cleaning.clean_link_id('link_id')
        }

    applicant_create_form = dynaform.extendDynaForm(
        dynaform = self._params['create_form'],
        dynaproperties = updated_fields)

    params['applicant_create_form'] = applicant_create_form

  @decorators.merge_params
  @decorators.check_access
  def applyMentor(self, request, access_type,
                  page_name=None, params=None, **kwargs):
    """Shows a list of all organizations and you can choose one to
       apply to become a mentor.

    Args:
      request: the standard Django HTTP request object
      access_type : the name of the access type which should be checked
      page_name: the page name displayed in templates as page and header title
      params: a dict with params for this View
      kwargs: the Key Fields for the specified entity
    """

    list_params = params.copy()
    list_params['list_action'] = (redirects.getRequestRedirectForRole, 'mentor')
    list_params['list_description'] = ugettext('Choose an Organization which '
        'you want to become a Mentor for.')

    filter = {'scope_path': kwargs['scope_path'],
              'status' : 'active'}

    return self.list(request, access_type,
        page_name, params=list_params, filter=filter)

  @decorators.merge_params
  @decorators.check_access
  def listProposals(self, request, access_type,
                    page_name=None, params=None, **kwargs):
    """Lists all proposals for the organization given in kwargs.

    For params see base.View.public().
    """

    from soc.logic.models.ranker_root import logic as ranker_root_logic
    from soc.models import student_proposal
    from soc.views.helper import list_info as list_info_helper
    from soc.views.models import student_proposal as student_proposal_view

    try:
      org_entity = self._logic.getFromKeyFieldsOr404(kwargs)
    except out_of_band.Error, error:
      return helper.responses.errorResponse(
          error, request, template=params['error_public'])

    context = {}
    context['entity'] = org_entity

    list_params = student_proposal_view.view.getParams().copy()
    list_params['list_template'] = 'soc/student_proposal/list_for_org.html'
    list_params['list_key_order'] = [
         'title', 'abstract', 'content', 'additional_info', 'mentor',
         'possible_mentors', 'score', 'status', 'created_on',
         'last_modified_on']

    ranked_params = list_params.copy()# ranked proposals
    ranked_params['list_row'] = ('soc/%(module_name)s/list/'
        'detailed_row.html' % list_params)
    ranked_params['list_heading'] = ('soc/%(module_name)s/list/'
        'detailed_heading.html' % list_params)
    ranked_params['list_description'] = '%s already under review sent to %s' % (
        ranked_params['name_plural'], org_entity.name)
    ranked_params['list_action'] = (redirects.getReviewRedirect, ranked_params)

    # TODO(ljvderijk) once sorting with IN operator is fixed, 
    # make this list show more
    filter = {'org': org_entity,
              'status': 'pending'}

    # order by descending score
    order = ['-score']

    prop_list = lists.getListContent(
        request, ranked_params, filter, order=order, idx=0)

    proposals = prop_list['data']

    # get a list of scores
    scores = [[proposal.score] for proposal in proposals]

    # retrieve the ranker
    fields = {'link_id': student_proposal.DEF_RANKER_NAME,
              'scope': org_entity}

    ranker_root = ranker_root_logic.getForFields(fields, unique=True)
    ranker = ranker_root_logic.getRootFromEntity(ranker_root)

    # retrieve the ranks for these scores
    ranks = [rank+1 for rank in ranker.FindRanks(scores)]

    # link the proposals to the rank
    ranking = dict([i for i in itertools.izip(proposals, ranks)])

    assigned_proposals = []

    # only when the program allows allocations 
    # to be seen we should color the list
    if org_entity.scope.allocations_visible:
      # get the limit and offset for the list
      _, offset = lists.getLimitAndOffset(request, 'offset_0', 'limit_0')

      # determine the amount of proposals to color
      to_color = max(0, org_entity.slots - offset)
      assigned_proposals = proposals[0:to_color]

      # show the amount of slots assigned on the webpage
      context['slots_visible'] = True

    # update the prop_list with the ranking and coloring information
    prop_list['info'] = (list_info_helper.getStudentProposalInfo(ranking,
        assigned_proposals), None)

    # check if the current user is a mentor
    user_entity = user_logic.logic.getForCurrentAccount()

    fields = {'user': user_entity,
        'scope': org_entity,}
    mentor_entity = mentor_logic.logic.getForFields(fields, unique=True)

    if mentor_entity:
      mp_params = list_params.copy() # proposals mentored by current user

      description = ugettext('List of %s sent to %s you are mentoring') % (
          mp_params['name_plural'], org_entity.name)
      mp_params['list_description'] = description
      mp_params['list_action'] = (redirects.getReviewRedirect, mp_params)

      filter = {'org': org_entity,
                'mentor': mentor_entity,
                'status': 'pending'}

      mp_list = lists.getListContent(
          request, mp_params, filter, idx=1, need_content=True)

    new_params = list_params.copy() # new proposals
    new_params['list_description'] = 'List of new %s sent to %s ' % (
        new_params['name_plural'], org_entity.name)
    new_params['list_action'] = (redirects.getReviewRedirect, new_params)

    filter = {'org': org_entity,
              'status': 'new'}

    contents = []
    new_list = lists.getListContent(
        request, new_params, filter, idx=2, need_content=True)

    ip_params = list_params.copy() # ineligible proposals

    description = ugettext('List of ineligible %s sent to %s ') % (
        ip_params['name_plural'], org_entity.name)

    ip_params['list_description'] = description
    ip_params['list_action'] = (redirects.getReviewRedirect, ip_params)

    filter = {'org': org_entity,
              'status': 'invalid'}

    ip_list = lists.getListContent(
        request, ip_params, filter, idx=3, need_content=True)

    # fill contents with all the needed lists
    if new_list != None:
      contents.append(new_list)

    contents.append(prop_list)

    if mentor_entity and mp_list != None:
      contents.append(mp_list)

    if ip_list != None:
      contents.append(ip_list)

    # call the _list method from base to display the list
    return self._list(request, list_params, contents, page_name, context)

  @decorators.merge_params
  @decorators.check_access
  def listPublic(self, request, access_type, page_name=None,
                 params=None, filter=None, **kwargs):
    """See base.View.list.
    """

    account = accounts.getCurrentAccount()
    user = user_logic.logic.getForAccount(account) if account else None

    try:
      rights = self._params['rights']
      rights.setCurrentUser(account, user)
      rights.checkIsHost()
      is_host = True
    except out_of_band.Error:
      is_host = False

    new_params = {}

    if is_host:
      new_params['list_action'] = (redirects.getAdminRedirect, params)
    else:
      new_params['list_action'] = (redirects.getPublicRedirect, params)
    # safe to merge them the wrong way around because of @merge_params
    params = dicts.merge(new_params, params)

    new_filter = {}

    new_filter['scope_path'] = kwargs['scope_path']
    new_filter['status'] = 'active'
    filter = dicts.merge(filter, new_filter)

    content = lists.getListContent(request, params, filter)
    contents = [content]

    return self._list(request, params, contents, page_name)

  def _public(self, request, entity, context):
    """See base.View._public().
    """

    from soc.views.models import student_project as student_project_view

    ap_params = student_project_view.view.getParams().copy() # accepted projects

    # define the list redirect action to show the notification
    ap_params['list_action'] = (redirects.getPublicRedirect, ap_params)
    ap_params['list_description'] = self.DEF_ACCEPTED_PROJECTS_MSG_FMT %(
                                        entity.name)
    ap_params['list_heading'] = 'soc/student_project/list/heading.html'
    ap_params['list_row'] = 'soc/student_project/list/row.html'

    # only show projects that have not failed
    filter = {'scope': entity,
              'status': ['accepted', 'mid_term_passed', 'passed']}

    ap_list = lists.getListContent(request, ap_params, filter, idx=0,
                                   need_content=True)

    contents = []

    if ap_list:
      contents.append(ap_list)

    # construct the list and put it into the context
    context['list'] = soc.logic.lists.Lists(contents)

    return super(View, self)._public(request=request, entity=entity, context=context)

  def _getExtraMenuItems(self, role_description, params=None):
    """Used to create the specific Organization menu entries.

    For args see group.View._getExtraMenuItems().
    """
    submenus = []

    group_entity = role_description['group']
    program_entity = group_entity.scope
    roles = role_description['roles']

    if roles.get('org_admin') or roles.get('mentor'):
      # add a link to view all the student proposals
      submenu = (redirects.getListProposalsRedirect(group_entity, params),
          "View all Student Proposals", 'any_access')
      submenus.append(submenu)


    if roles.get('org_admin'):
      # add a link to manage student projects after they have been announced
      if timeline_helper.isAfterEvent(program_entity.timeline,
                                     'accepted_students_announced_deadline'):
        submenu = (redirects.getManageOverviewRedirect(group_entity,
            {'url_name': 'student_project'}),
            "Manage Student Projects", 'any_access')
        submenus.append(submenu)

      # add a link to the management page
      submenu = (redirects.getListRolesRedirect(group_entity, params),
          "Manage Admins and Mentors", 'any_access')
      submenus.append(submenu)

      # add a link to invite an org admin
      submenu = (redirects.getInviteRedirectForRole(group_entity, 'org_admin'),
          "Invite an Admin", 'any_access')
      submenus.append(submenu)

      # add a link to invite a member
      submenu = (redirects.getInviteRedirectForRole(group_entity, 'mentor'),
          "Invite a Mentor", 'any_access')
      submenus.append(submenu)

      # add a link to the request page
      submenu = (redirects.getListRequestsRedirect(group_entity, params),
          "List Requests and Invites", 'any_access')
      submenus.append(submenu)

      # add a link to the edit page
      submenu = (redirects.getEditRedirect(group_entity, params),
          "Edit Organization Profile", 'any_access')
      submenus.append(submenu)

    if roles.get('org_admin') or roles.get('mentor'):
      submenu = (redirects.getCreateDocumentRedirect(group_entity, 'org'),
          "Create a New Document", 'any_access')
      submenus.append(submenu)

      submenu = (redirects.getListDocumentsRedirect(group_entity, 'org'),
          "List Documents", 'any_access')
      submenus.append(submenu)


    if roles.get('org_admin'):
      # add a link to the resign page
      submenu = (redirects.getManageRedirect(roles['org_admin'],
          {'url_name': 'org_admin'}),
          "Resign as Admin", 'any_access')
      submenus.append(submenu)

      # add a link to the edit page
      submenu = (redirects.getEditRedirect(roles['org_admin'],
          {'url_name': 'org_admin'}),
          "Edit My Admin Profile", 'any_access')
      submenus.append(submenu)


    if roles.get('mentor'):
      # add a link to the resign page
      submenu = (redirects.getManageRedirect(roles['mentor'],
          {'url_name' : 'mentor'}),
          "Resign as Mentor", 'any_access')
      submenus.append(submenu)

      # add a link to the edit page
      submenu = (redirects.getEditRedirect(roles['mentor'],
          {'url_name': 'mentor'}),
          "Edit My Mentor Profile", 'any_access')
      submenus.append(submenu)

    return submenus


view = View()

admin = decorators.view(view.admin)
applicant = decorators.view(view.applicant)
apply_mentor = decorators.view(view.applyMentor)
create = decorators.view(view.create)
delete = decorators.view(view.delete)
edit = decorators.view(view.edit)
home = decorators.view(view.home)
list = decorators.view(view.list)
list_proposals = decorators.view(view.listProposals)
list_public = decorators.view(view.listPublic)
list_requests = decorators.view(view.listRequests)
list_roles = decorators.view(view.listRoles)
public = decorators.view(view.public)
export = decorators.view(view.export)
pick = decorators.view(view.pick)