"""This module regroups a set of structures that may be used to configure

various places of the generated web interface.

Primary view configuration

``````````````````````````

:primaryview_section:

   where to display a relation in primary view. Value may be one of:

   * 'attributes', display in the attributes section

   * 'relations', display in the relations section (below attributes)

   * 'sideboxes', display in the side boxes (beside attributes)

   * 'hidden', don't display

:primaryview_display_ctrl:

   how to display a relation in primary view. Values are dict with some of the

   following keys:

   :vid:

      identifier of a view to use to display the result set. Defaults depends on

      the section:

      * 'attributes' section: 'reledit' view

      * 'relations' section: 'autolimited' view

      * 'sideboxes' section: 'sidebox' view

   :label:

     label for the relations section or side box

   :limit:

      boolean telling if the results should be limited according to the

      configuration

   :filter:

      callback taking the related result set as argument and returning it

      filtered

   :order:

      int used to control order within a section. When not specified,

      automatically set according to order in which tags are added.

   Notice those values are only considered if the relation is in a displayed

   section (controlled by :attr:`primaryview_section`)

Index view configuration

````````````````````````

:indexview_etype_section:

   entity type category in the index/manage page. May be one of

   * 'application'

   * 'system'

   * 'schema'

   * 'subobject' (not displayed by default)

Actions box configuration

`````````````````````````

:actionbox_appearsin_addmenu:

  simple boolean relation tags used to control the "add entity" submenu.

  Relations whose rtag is True will appears, other won't.

Automatic form configuration

````````````````````````````

:organization: Logilab

:copyright: 2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.

:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr

:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses

"""

__docformat__ = "restructuredtext en"

from cubicweb import neg_role

from cubicweb.rtags import (RelationTags, RelationTagsBool,

                            RelationTagsSet, RelationTagsDict, register_rtag)

from cubicweb.web import formwidgets

def card_from_role(card, role):

    if role == 'subject':

        return card[0]

    assert role in ('object', 'sobject'), repr(role)

    return card[1]

# primary view configuration ##################################################

def init_primaryview_section(rtag, sschema, rschema, oschema, role):

    if rtag.get(sschema, rschema, oschema, role) is None:

        card = card_from_role(rschema.rproperty(sschema, oschema, 'cardinality'), role)

        composed = rschema.rproperty(sschema, oschema, 'composite') == neg_role(role)

        if rschema.is_final():

            if rschema.meta or sschema.is_metadata(rschema) \

                    or oschema.type in ('Password', 'Bytes'):

                section = 'hidden'

            else:

                section = 'attributes'

        elif card in '1+':

            section = 'attributes'

        elif composed:

            section = 'relations'

        else:

            section = 'sideboxes'

        rtag.tag_relation((sschema, rschema, oschema, role), section)

primaryview_section = RelationTags('primaryview_section',

                                   init_primaryview_section,

                                   frozenset(('attributes', 'relations',

                                               'sideboxes', 'hidden')))

class DisplayCtrlRelationTags(RelationTagsDict):

    def __init__(self, *args, **kwargs):

        super(DisplayCtrlRelationTags, self).__init__(*args, **kwargs)

        self._counter = 0

    def tag_relation(self, key, tag):

        tag = super(DisplayCtrlRelationTags, self).tag_relation(key, tag)

        self._counter += 1

        tag.setdefault('order', self._counter)

    def tag_subject_of(self, key, tag):

        subj, rtype, obj = key

        if obj != '*':

            self.warning('using explict target type in display_ctrl.tag_subject_of() '

                         'has no effect, use (%s, %s, "*") instead of (%s, %s, %s)',

                         subj, rtype, subj, rtype, obj)

        super(DisplayCtrlRelationTags, self).tag_subject_of((subj, rtype, '*'), tag)

    def tag_object_of(self, key, tag):

        subj, rtype, obj = key

        if subj != '*':

            self.warning('using explict subject type in display_ctrl.tag_object_of() '

                         'has no effect, use ("*", %s, %s) instead of (%s, %s, %s)',

                         rtype, obj, subj, rtype, obj)

        super(DisplayCtrlRelationTags, self).tag_object_of(('*', rtype, obj), tag)

def init_primaryview_display_ctrl(rtag, sschema, rschema, oschema, role):

    if role == 'subject':

        oschema = '*'

        label = rschema.type

    else:

        sschema = '*'

        label = '%s_%s' % (rschema, role)

    rtag.setdefault((sschema, rschema, oschema, role), 'label', label)

    rtag.setdefault((sschema, rschema, oschema, role), 'order', rtag._counter)

primaryview_display_ctrl = DisplayCtrlRelationTags('primaryview_display_ctrl',

                                                   init_primaryview_display_ctrl)

# index view configuration ####################################################

# entity type section in the index/manage page. May be one of

# * 'application'

# * 'system'

# * 'schema'

# * 'hidden'

# * 'subobject' (not displayed by default)

class InitializableDict(dict):

    def __init__(self, *args, **kwargs):

        super(InitializableDict, self).__init__(*args, **kwargs)

        register_rtag(self)

    def init(self, schema, check=True):

        for eschema in schema.entities():

            if eschema.schema_entity():

                self.setdefault(eschema, 'schema')

            elif eschema.is_subobject(strict=True):

                self.setdefault(eschema, 'subobject')

            else:

                self.setdefault(eschema, 'application')

indexview_etype_section = InitializableDict(EmailAddress='subobject',

                                            CWUser='system',

                                            CWGroup='system',

                                            CWPermission='system',

                                            BaseTransition='hidden',

                                            )

# autoform.AutomaticEntityForm configuration ##################################

# relations'section (eg primary/secondary/generic/metadata/generated)

def init_autoform_section(rtag, sschema, rschema, oschema, role):

    if rtag.get(sschema, rschema, oschema, role) is None:

        if autoform_is_inlined.get(sschema, rschema, oschema, role):

            section = 'generated'

        elif sschema.is_metadata(rschema):

            section = 'metadata'

        else:

            if role == 'subject':

                card = rschema.rproperty(sschema, oschema, 'cardinality')[0]

                composed = rschema.rproperty(sschema, oschema, 'composite') == 'object'

            else:

                card = rschema.rproperty(sschema, oschema, 'cardinality')[1]

                composed = rschema.rproperty(sschema, oschema, 'composite') == 'subject'

            if card in '1+':

                if not rschema.is_final() and composed:

                    # XXX why? probably because we want it unlined, though this

                    # is not the case by default

                    section = 'generated'

                else:

                    section = 'primary'

            elif rschema.is_final():

                section = 'secondary'

            else:

                section = 'generic'

        rtag.tag_relation((sschema, rschema, oschema, role), section)

autoform_section = RelationTags('autoform_section', init_autoform_section,

                                set(('primary', 'secondary', 'generic',

                                     'metadata', 'generated')))

# relations'field class

autoform_field = RelationTags('autoform_field')

# relations'field explicit kwargs (given to field's __init__)

autoform_field_kwargs = RelationTagsDict()

# inlined view flag for non final relations: when True for an entry, the

# entity(ies) at the other end of the relation will be editable from the

# form of the edited entity

autoform_is_inlined = RelationTagsBool('autoform_is_inlined')

# set of tags of the form <action>_on_new on relations. <action> is a

# schema action (add/update/delete/read), and when such a tag is found

# permissions checking is by-passed and supposed to be ok

autoform_permissions_overrides = RelationTagsSet('autoform_permissions_overrides')

# boxes.EditBox configuration #################################################

# 'link' / 'create' relation tags, used to control the "add entity" submenu

def init_actionbox_appearsin_addmenu(rtag, sschema, rschema, oschema, role):

    if rtag.get(sschema, rschema, oschema, role) is None:

        card = rschema.rproperty(sschema, oschema, 'cardinality')[role == 'object']

        if not card in '?1' and \

               rschema.rproperty(sschema, oschema, 'composite') == role:

            rtag.tag_relation((sschema, rschema, oschema, role), True)

actionbox_appearsin_addmenu = RelationTagsBool('actionbox_appearsin_addmenu',

                                               init_actionbox_appearsin_addmenu)