"""

generic boxes for CubicWeb web client:

* actions box

* possible views box

additional (disabled by default) boxes

* schema box

* startup views box

:organization: Logilab

:copyright: 2001-2009 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"

_ = unicode

from logilab.mtconverter import xml_escape

from cubicweb.selectors import match_user_groups, non_final_entity

from cubicweb.view import EntityView

from cubicweb.schema import display_name

from cubicweb.web.htmlwidgets import BoxWidget, BoxMenu, BoxHtml, RawBoxItem

from cubicweb.web import uicfg

from cubicweb.web.box import BoxTemplate

class EditBox(BoxTemplate):

    """

    box with all actions impacting the entity displayed: edit, copy, delete

    change state, add related entities

    """

    id = 'edit_box'

    __select__ = BoxTemplate.__select__ & non_final_entity()

    title = _('actions')

    order = 2

    # class attributes below are actually stored in the uicfg module since we

    # don't want them to be reloaded

    appearsin_addmenu = uicfg.actionbox_appearsin_addmenu

    def call(self, view=None, **kwargs):

        _ = self.req._

        title = _(self.title)

        if self.rset:

            etypes = self.rset.column_types(0)

            if len(etypes) == 1:

                plural = self.rset.rowcount > 1 and 'plural' or ''

                etypelabel = display_name(self.req, iter(etypes).next(), plural)

                title = u'%s - %s' % (title, etypelabel.lower())

        box = BoxWidget(title, self.id, _class="greyBoxFrame")

        # build list of actions

        actions = self.vreg['actions'].possible_actions(self.req, self.rset,

                                                        view=view)

        add_menu = BoxMenu(_('add')) # 'addrelated' category

        other_menu = BoxMenu(_('more actions')) # 'moreactions' category

        searchstate = self.req.search_state[0]

        for category, menu in (('mainactions', box),

                               ('addrelated', add_menu),

                               ('moreactions', other_menu)):

            for action in actions.get(category, ()):

                menu.append(self.box_action(action))

        if self.rset and self.rset.rowcount == 1 and \

               not self.schema[self.rset.description[0][0]].is_final() and \

               searchstate == 'normal':

            entity = self.rset.get_entity(0, 0)

            for action in self.schema_actions(entity):

                add_menu.append(action)

            self.workflow_actions(entity, box)

        if box.is_empty() and not other_menu.is_empty():

            box.items = other_menu.items

            other_menu.items = []

        self.add_submenu(box, add_menu, _('add'))

        self.add_submenu(box, other_menu)

        if not box.is_empty():

            box.render(self.w)

    def add_submenu(self, box, submenu, label_prefix=None):

        if len(submenu.items) == 1:

            boxlink = submenu.items[0]

            if label_prefix:

                boxlink.label = u'%s %s' % (label_prefix, boxlink.label)

            box.append(boxlink)

        elif submenu.items:

            box.append(submenu)

    def schema_actions(self, entity):

        user = self.req.user

        actions = []

        _ = self.req._

        eschema = entity.e_schema

        for rschema, teschema, x in self.add_related_schemas(entity):

            if x == 'subject':

                label = 'add %s %s %s %s' % (eschema, rschema, teschema, x)

                url = self.linkto_url(entity, rschema, teschema, 'object')

            else:

                label = 'add %s %s %s %s' % (teschema, rschema, eschema, x)

                url = self.linkto_url(entity, rschema, teschema, 'subject')

            actions.append(self.mk_action(_(label), url))

        return actions

    def add_related_schemas(self, entity):

        """this is actually used ui method to generate 'addrelated' actions from

        the schema.

        If you don't want any auto-generated actions, you should overrides this

        method to return an empty list. If you only want some, you can configure

        them by using uicfg.actionbox_appearsin_addmenu

        """

        req = self.req

        eschema = entity.e_schema

        for role, rschemas in (('subject', eschema.subject_relations()),

                               ('object', eschema.object_relations())):

            for rschema in rschemas:

                if rschema.is_final():

                    continue

                # check the relation can be added as well

                # XXX consider autoform_permissions_overrides?

                if role == 'subject'and not rschema.has_perm(req, 'add',

                                                             fromeid=entity.eid):

                    continue

                if role == 'object'and not rschema.has_perm(req, 'add',

                                                            toeid=entity.eid):

                    continue

                # check the target types can be added as well

                for teschema in rschema.targets(eschema, role):

                    if not self.appearsin_addmenu.etype_get(eschema, rschema,

                                                            role, teschema):

                        continue

                    if teschema.has_local_role('add') or teschema.has_perm(req, 'add'):

                        yield rschema, teschema, role

    def workflow_actions(self, entity, box):

        if entity.e_schema.has_subject_relation('in_state') and entity.in_state:

            _ = self.req._

            menu_title = u'%s: %s' % (_('state'), entity.printable_state)

            menu_items = []

            for tr in entity.possible_transitions():

                url = entity.absolute_url(vid='statuschange', treid=tr.eid)

                menu_items.append(self.mk_action(_(tr.name), url))

            # don't propose to see wf if user can't pass any transition

            if menu_items:

                wfurl = self.build_url('cwetype/%s'%entity.e_schema, vid='workflow')

                menu_items.append(self.mk_action(_('view workflow'), wfurl))

                wfurl = entity.absolute_url(vid='wfhistory')

                menu_items.append(self.mk_action(_('view history'), wfurl))

            box.append(BoxMenu(menu_title, menu_items))

        return None

    def linkto_url(self, entity, rtype, etype, target):

        return self.build_url(vid='creation', etype=etype,

                              __linkto='%s:%s:%s' % (rtype, entity.eid, target),

                              __redirectpath=entity.rest_path(), # should not be url quoted!

                              __redirectvid=self.req.form.get('vid', ''))

class SearchBox(BoxTemplate):

    """display a box with a simple search form"""

    id = 'search_box'

    visible = True # enabled by default

    title = _('search')

    order = 0

    formdef = u"""<form action="%s">

<table id="tsearch"><tr><td>

<input id="norql" type="text" accesskey="q" tabindex="%s" title="search text" value="%s" name="rql" />

<input type="hidden" name="__fromsearchbox" value="1" />

<input type="hidden" name="subvid" value="tsearch" />

</td><td>

<input tabindex="%s" type="submit" id="rqlboxsubmit" class="rqlsubmit" value="" />

</td></tr></table>

</form>"""

    def call(self, view=None, **kwargs):

        req = self.req

        if req.form.pop('__fromsearchbox', None):

            rql = req.form.get('rql', '')

        else:

            rql = ''

        form = self.formdef % (req.build_url('view'), req.next_tabindex(),

                               xml_escape(rql), req.next_tabindex())

        title = u"""<span onclick="javascript: toggleVisibility('rqlinput')">%s</span>""" % req._(self.title)

        box = BoxWidget(title, self.id, _class="searchBoxFrame", islist=False, escape=False)

        box.append(BoxHtml(form))

        box.render(self.w)

# boxes disabled by default ###################################################

class PossibleViewsBox(BoxTemplate):

    """display a box containing links to all possible views"""

    id = 'possible_views_box'

    __select__ = BoxTemplate.__select__ & match_user_groups('users', 'managers')

    visible = False

    title = _('possible views')

    order = 10

    def call(self, **kwargs):

        box = BoxWidget(self.req._(self.title), self.id)

        views = [v for v in self.vreg['views'].possible_views(self.req,

                                                              rset=self.rset)

                 if v.category != 'startupview']

        for category, views in self.sort_actions(views):

            menu = BoxMenu(category)

            for view in views:

                menu.append(self.box_action(view))

            box.append(menu)

        if not box.is_empty():

            box.render(self.w)

class StartupViewsBox(BoxTemplate):

    """display a box containing links to all startup views"""

    id = 'startup_views_box'

    visible = False # disabled by default

    title = _('startup views')

    order = 70

    def call(self, **kwargs):

        box = BoxWidget(self.req._(self.title), self.id)

        for view in self.vreg['views'].possible_views(self.req, None):

            if view.category == 'startupview':

                box.append(self.box_action(view))

        if not box.is_empty():

            box.render(self.w)

# helper classes ##############################################################

class SideBoxView(EntityView):

    """helper view class to display some entities in a sidebox"""

    id = 'sidebox'

    def call(self, boxclass='sideBox', title=u''):

        """display a list of entities by calling their <item_vid> view"""

        if title:

            self.w(u'<div class="sideBoxTitle"><span>%s</span></div>' % title)

        self.w(u'<div class="%s"><div class="sideBoxBody">' % boxclass)

        # if not too much entities, show them all in a list

        maxrelated = self.req.property_value('navigation.related-limit')

        if self.rset.rowcount <= maxrelated:

            if len(self.rset) == 1:

                self.wview('incontext', self.rset, row=0)

            elif 1 < len(self.rset) < 5:

                self.wview('csv', self.rset)

            else:

                self.wview('simplelist', self.rset)

        # else show links to display related entities

        else:

            self.rset.limit(maxrelated)

            rql = self.rset.printable_rql(encoded=False)

            self.wview('simplelist', self.rset)

            self.w(u'[<a href="%s">%s</a>]' % (self.build_url(rql=rql),

                                               self.req._('see them all')))

        self.w(u'</div>\n</div>\n')