"""Set of HTML startup views. A startup view is global, e.g. doesn't

apply to a result set.

: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.common.textutils import unormalize

from logilab.mtconverter import xml_escape

from cubicweb.view import StartupView

from cubicweb.selectors import match_user_groups, implements

from cubicweb.schema import display_name

from cubicweb.web import ajax_replace_url, uicfg, httpcache

class ManageView(StartupView):

    __regid__ = 'manage'

    title = _('manage')

    http_cache_manager = httpcache.EtagHTTPCacheManager

    add_etype_links = ()

    def display_folders(self):

        return False

    def call(self, **kwargs):

        """The default view representing the instance's management"""

        self._cw.add_css('cubicweb.manageview.css')

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

        if not self.display_folders():

            self._main_index()

        else:

            self.w(u'<table><tr>\n')

            self.w(u'<td style="width:40%">')

            self._main_index()

            self.w(u'</td><td style="width:60%">')

            self.folders()

            self.w(u'</td>')

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

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

    def _main_index(self):

        req = self._cw

        manager = req.user.matching_groups('managers')

        if not manager and 'Card' in self._cw.vreg.schema:

            rset = self._cw.execute('Card X WHERE X wikiid "index"')

        else:

            rset = None

        if rset:

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

        else:

            self.entities()

            self.w(u'<div class="hr">&#160;</div>')

            self.startup_views()

        if manager and 'Card' in self._cw.vreg.schema:

            self.w(u'<div class="hr">&#160;</div>')

            if rset:

                href = rset.get_entity(0, 0).absolute_url(vid='edition')

                label = self._cw._('edit the index page')

            else:

                href = req.build_url('view', vid='creation', etype='Card', wikiid='index')

                label = self._cw._('create an index page')

            self.w(u'<br/><a href="%s">%s</a>\n' % (xml_escape(href), label))

    def folders(self):

        self.w(u'<h4>%s</h4>\n' % self._cw._('Browse by category'))

        self._cw.vreg['views'].select('tree', self._cw).render(w=self.w)

    def create_links(self):

        self.w(u'<ul class="createLink">')

        for etype in self.add_etype_links:

            eschema = self.schema.eschema(etype)

            if eschema.has_perm(self.req, 'add'):

                self.w(u'<li><a href="%s">%s</a></li>' % (

                        self.req.build_url('add/%s' % eschema),

                        self.req.__('add a %s' % eschema).capitalize()))

        self.w(u'</ul>')

    def startup_views(self):

        self.w(u'<h4>%s</h4>\n' % self._cw._('Startup views'))

        self.startupviews_table()

    def startupviews_table(self):

        for v in self._cw.vreg['views'].possible_views(self._cw, None):

            if v.category != 'startupview' or v.__regid__ in ('index', 'tree', 'manage'):

                continue

            self.w('<p><a href="%s">%s</a></p>' % (

                xml_escape(v.url()), xml_escape(self._cw._(v.title).capitalize())))

    def entities(self):

        schema = self._cw.vreg.schema

        self.w(u'<h4>%s</h4>\n' % self._cw._('The repository holds the following entities'))

        manager = self._cw.user.matching_groups('managers')

        self.w(u'<table class="startup">')

        if manager:

            self.w(u'<tr><th colspan="4">%s</th></tr>\n' % self._cw._('application entities'))

        self.entity_types_table(eschema for eschema in schema.entities()

                                if uicfg.indexview_etype_section.get(eschema) == 'application')

        if manager:

            self.w(u'<tr><th colspan="4">%s</th></tr>\n' % self._cw._('system entities'))

            self.entity_types_table(eschema for eschema in schema.entities()

                                if uicfg.indexview_etype_section.get(eschema) == 'system')

            if 'CWAttribute' in schema: # check schema support

                self.w(u'<tr><th colspan="4">%s</th></tr>\n' % self._cw._('schema entities'))

                self.entity_types_table(eschema for eschema in schema.entities()

                                        if uicfg.indexview_etype_section.get(eschema) == 'schema')

        self.w(u'</table>')

    def entity_types_table(self, eschemas):

        newline = 0

        infos = sorted(self.entity_types(eschemas),

                       key=lambda (l,a,e):unormalize(l))

        q, r = divmod(len(infos), 2)

        if r:

            infos.append( (None, ' ', ' ') )

        infos = zip(infos[:q+r], infos[q+r:])

        for (_, etypelink, addlink), (_, etypelink2, addlink2) in infos:

            self.w(u'<tr>\n')

            self.w(u'<td class="addcol">%s</td><td>%s</td>\n' % (addlink,  etypelink))

            self.w(u'<td class="addcol">%s</td><td>%s</td>\n' % (addlink2, etypelink2))

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

    def entity_types(self, eschemas):

        """return a list of formatted links to get a list of entities of

        a each entity's types

        """

        req = self._cw

        for eschema in eschemas:

            if eschema.final or not eschema.may_have_permission('read', req):

                continue

            etype = eschema.type

            label = display_name(req, etype, 'plural')

            nb = req.execute('Any COUNT(X) WHERE X is %s' % etype)[0][0]

            url = self._cw.build_url(etype)

            etypelink = u'&#160;<a href="%s">%s</a> (%d)' % (

                xml_escape(url), label, nb)

            yield (label, etypelink, self.add_entity_link(eschema, req))

    def add_entity_link(self, eschema, req):

        """creates a [+] link for adding an entity if user has permission to do so"""

        if not eschema.has_perm(req, 'add'):

            return u''

        return u'[<a href="%s" title="%s">+</a>]' % (

            xml_escape(self.create_url(eschema.type)),

            self._cw.__('add a %s' % eschema))

class IndexView(ManageView):

    __regid__ = 'index'

    title = _('view_index')

    def display_folders(self):

        return 'Folder' in self._cw.vreg.schema and self._cw.execute('Any COUNT(X) WHERE X is Folder')[0][0]