"""Specific views for CWProperty

:organization: Logilab

:copyright: 2007-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

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

"""

__docformat__ = "restructuredtext en"

from logilab.mtconverter import html_escape

from logilab.common.decorators import cached

from cubicweb import UnknownProperty

from cubicweb.selectors import (one_line_rset, none_rset, implements,

                                match_user_groups)

from cubicweb.view import StartupView

from cubicweb.web import uicfg

from cubicweb.web.views import baseviews

from cubicweb.web import stdmsgs

from cubicweb.web.form import CompositeForm, EntityFieldsForm, FormViewMixIn

from cubicweb.web.formfields import FIELDS, StringField

from cubicweb.web.formwidgets import Select, Button, SubmitButton

_ = unicode

# some string we want to be internationalizable for nicer display of eproperty

# groups

_('navigation')

_('ui')

_('actions')

_('boxes')

_('components')

_('contentnavigation')

def make_togglable_link(nodeid, label, cookiename):

    """builds a HTML link that switches the visibility & remembers it"""

    action = u"javascript: toggle_and_remember_visibility('%s', '%s')" % \

        (nodeid, cookiename)

    return u'<a href="%s">%s</a>' % (action, label)

def css_class(someclass):

    return someclass and 'class="%s"' % someclass or ''

class CWPropertyPrimaryView(baseviews.PrimaryView):

    __select__ = implements('CWProperty')

    skip_none = False

class SystemEPropertiesForm(FormViewMixIn, StartupView):

    id = 'systemepropertiesform'

    __select__ = none_rset() & match_user_groups('managers')

    title = _('site configuration')

    category = 'startupview'

    def linkable(self):

        return True

    def url(self):

        """return the url associated with this view. We can omit rql here"""

        return self.build_url('view', vid=self.id)

    def _cookie_name(self, somestr):

        return str('%s_property_%s' % (self.config.appid, somestr))

    def _group_status(self, group, default=u'hidden'):

        """return css class name 'hidden' (collapsed), or '' (open)"""

        cookies = self.req.get_cookie()

        cookiename = self._cookie_name(group)

        cookie = cookies.get(cookiename)

        if cookie is None:

            cookies[cookiename] = default

            self.req.set_cookie(cookies, cookiename, maxage=None)

            status = default

        else:

            status = cookie.value

        return status

    def call(self, **kwargs):

        """The default view representing the application's index"""

        self.req.add_js('cubicweb.preferences.js')

        self.req.add_css('cubicweb.preferences.css')

        vreg = self.vreg

        values = self.defined_keys

        groupedopts = {}

        mainopts = {}

        # "self.id=='systemepropertiesform'" to skip site wide properties on

        # user's preference but not site's configuration

        for key in vreg.user_property_keys(self.id=='systemepropertiesform'):

            parts = key.split('.')

            if parts[0] in vreg:

                # appobject configuration

                reg, oid, propid = parts

                groupedopts.setdefault(reg, {}).setdefault(oid, []).append(key)

            else:

                mainopts.setdefault(parts[0], []).append(key)

        # precompute form to consume error message

        for group, keys in mainopts.items():

            mainopts[group] = self.form(keys, True)

        for group, objects in groupedopts.items():

            for oid, keys in objects.items():

                groupedopts[group][oid] = self.form(keys, True)

        w = self.w

        req = self.req

        _ = req._

        w(u'<h1>%s</h1>\n' % _(self.title))

        # we don't want this in each sub-forms

        w(u'<div id="progress">%s</div>' % self.req._('validating...'))

        for label, group, form in sorted((_(g), g, f)

                                         for g, f in mainopts.iteritems()):

            status = css_class(self._group_status(group))

            w(u'<h2 class="propertiesform">%s</h2>\n' %

              (make_togglable_link('fieldset_' + group, label,

                                   self._cookie_name(group))))

            w(u'<div id="fieldset_%s" %s>' % (group, status))

            w(form)

            w(u'</div>')

        for label, group, objects in sorted((_(g), g, o)

                                            for g, o in groupedopts.iteritems()):

            status = css_class(self._group_status(group))

            w(u'<h2 class="propertiesform">%s</h2>\n' %

              (make_togglable_link('fieldset_' + group, label,

                                   self._cookie_name(group))))

            w(u'<div id="fieldset_%s" %s>' % (group, status))

            for label, oid, form in sorted((self.req.__('%s_%s' % (group, o)), o, f)

                                           for o, f in objects.iteritems()):

                w(u'<fieldset class="subentity">')

                w(u'<legend class="componentTitle">%s</legend>\n' % label)

                docmsgid = '%s_%s_description' % (group, oid)

                doc = _(docmsgid)

                if doc != docmsgid:

                    w(u'<p class="description">%s</p>' % html_escape(doc))

                w(form)

                w(u'</fieldset>')

            w(u'</div>')

    @property

    @cached

    def eprops_rset(self):

        return self.req.execute('Any P,K,V WHERE P is CWProperty, P pkey K, '

                                'P value V, NOT P for_user U')

    @property

    def defined_keys(self):

        values = {}

        for i, entity in enumerate(self.eprops_rset.entities()):

            values[entity.pkey] = i

        return values

    def entity_for_key(self, key):

        values = self.defined_keys

        if key in values:

            entity = self.eprops_rset.get_entity(values[key], 0)

        else:

            entity = self.vreg.etype_class('CWProperty')(self.req, None, None)

            entity.eid = self.req.varmaker.next()

            entity['pkey'] = key

            entity['value'] = self.vreg.property_value(key)

        return entity

    def form(self, keys, splitlabel=False):

        buttons = [SubmitButton(),

                   Button(stdmsgs.BUTTON_CANCEL, cwaction='cancel')]

        form = CompositeForm(self.req, domid=None, action=self.build_url(),

                             form_buttons=buttons,

                             submitmsg=self.req._('changes applied'))

        path = self.req.relative_path()

        if '?' in path:

            path, params = path.split('?', 1)

            form.form_add_hidden('__redirectparams', params)

        form.form_add_hidden('__redirectpath', path)

        for key in keys:

            self.form_row(form, key, splitlabel)

        return form.form_render(display_progress_div=False)

    def form_row(self, form, key, splitlabel):

        entity = self.entity_for_key(key)

        if splitlabel:

            label = key.split('.')[-1]

        else:

            label = key

        subform = EntityFieldsForm(self.req, entity=entity, set_error_url=False)

        subform.append_field(PropertyValueField(name='value', label=label,

                                                eidparam=True))

        subform.vreg = self.vreg

        subform.form_add_hidden('pkey', key, eidparam=True)

        form.form_add_subform(subform)

        return subform

def is_user_prefs(cls, req, rset, row=None, col=0, **kwargs):

    return req.user.eid == rset[row or 0][col]

class EPropertiesForm(SystemEPropertiesForm):

    id = 'epropertiesform'

    __select__ = (

        # we don't want guests to be able to come here

        match_user_groups('users', 'managers') &

        (none_rset() | ((one_line_rset() & is_user_prefs) &

                        (one_line_rset() & match_user_groups('managers'))))

        )

    title = _('preferences')

    @property

    def user(self):

        if self.rset is None:

            return self.req.user

        return self.rset.get_entity(self.row or 0, self.col or 0)

    @property

    @cached

    def eprops_rset(self):

        return self.req.execute('Any P,K,V WHERE P is CWProperty, P pkey K, P value V,'

                                'P for_user U, U eid %(x)s', {'x': self.user.eid})

    def form_row(self, form, key, splitlabel):

        subform = super(EPropertiesForm, self).form_row(form, key, splitlabel)

        # if user is in the managers group and the property is being created,

        # we have to set for_user explicitly

        if not subform.edited_entity.has_eid() and self.user.matching_groups('managers'):

            subform.form_add_hidden('for_user', self.user.eid, eidparam=True)

# eproperty form objects ######################################################

class PlaceHolderWidget(object):

    def render(self, form, field):

        domid = form.context[field]['id']

        # empty span as well else html validation fail (label is refering to

        # this id)

        return '<div id="div:%s"><span id="%s">%s</span></div>' % (

            domid, domid, form.req._('select a key first'))

class NotEditableWidget(object):

    def __init__(self, value, msg=None):

        self.value = value

        self.msg = msg

    def render(self, form, field):

        domid = form.context[field]['id']

        value = '<span class="value" id="%s">%s</span>' % (domid, self.value)

        if self.msg:

            value + '<div class="helper">%s</div>' % self.msg

        return value

class PropertyKeyField(StringField):

    """specific field for CWProperty.pkey to set the value widget according to

    the selected key

    """

    widget = Select

    def render(self, form, renderer):

        wdg = self.get_widget(form)

        wdg.attrs['tabindex'] = form.req.next_tabindex()

        wdg.attrs['onchange'] = "javascript:setPropValueWidget('%s', %s)" % (

            form.edited_entity.eid, form.req.next_tabindex())

        return wdg.render(form, self)

    def vocabulary(self, form):

        entity = form.edited_entity

        _ = form.req._

        if entity.has_eid():

            return [(_(entity.pkey), entity.pkey)]

        # key beginning with 'system.' should usually not be edited by hand

        choices = entity.vreg.user_property_keys()

        return [(u'', u'')] + sorted(zip((_(v) for v in choices), choices))

class PropertyValueField(StringField):

    """specific field for CWProperty.value  which will be different according to

    the selected key type and vocabulary information

    """

    widget = PlaceHolderWidget

    def render(self, form, renderer=None, tabindex=None):

        wdg = self.get_widget(form)

        if tabindex is not None:

            wdg.attrs['tabindex'] = tabindex

        return wdg.render(form, self)

    def form_init(self, form):

        entity = form.edited_entity

        if not (entity.has_eid() or 'pkey' in entity):

            # no key set yet, just include an empty div which will be filled

            # on key selection

            return

        try:

            pdef = form.vreg.property_info(entity.pkey)

        except UnknownProperty, ex:

            self.warning('%s (you should probably delete that property '

                         'from the database)', ex)

            msg = form.req._('you should probably delete that property')

            self.widget = NotEditableWidget(entity.printable_value('value'),

                                            '%s (%s)' % (msg, ex))

        if entity.pkey.startswith('system.'):

            msg = form.req._('value associated to this key is not editable '

                             'manually')

            self.widget = NotEditableWidget(entity.printable_value('value'), msg)

        # XXX race condition when used from CWPropertyForm, should not rely on

        # instance attributes

        self.initial = pdef['default']

        self.help = pdef['help']

        vocab = pdef['vocabulary']

        if vocab is not None:

            if callable(vocab):

                # list() just in case its a generator function

                self.choices = list(vocab(form.req))

            else:

                self.choices = vocab

            wdg = Select()

        else:

            wdg = FIELDS[pdef['type']].widget()

            if pdef['type'] == 'Boolean':

                self.choices = [(form.req._('yes'), '1'), (form.req._('no'), '')]

            elif pdef['type'] in ('Float', 'Int'):

                wdg.attrs.setdefault('size', 3)

        self.widget = wdg

uicfg.rfields.tag_relation(PropertyKeyField, ('CWProperty', 'pkey', '*'), 'subject')

uicfg.rfields.tag_relation(PropertyValueField, ('CWProperty', 'value', '*'), 'subject')