"""management and error screens

: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"

from time import strftime, localtime

from logilab.mtconverter import xml_escape

from cubicweb.selectors import none_rset, match_user_groups

from cubicweb.view import StartupView

def dict_to_html(w, dict):

    # XHTML doesn't allow emtpy <ul> nodes

    if dict:

        w(u'<ul>')

        for key in sorted(dict):

            w(u'<li><span class="label">%s</span>: <span>%s</span></li>' % (

                xml_escape(str(key)), xml_escape(repr(dict[key]))))

        w(u'</ul>')

class DebugView(StartupView):

    __regid__ = 'debug'

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

    title = _('server debug information')

    def call(self, **kwargs):

        """display server information"""

        w = self.w

        w(u'<h1>server sessions</h1>')

        sessions = self.req.cnx._repo._sessions.items()

        if sessions:

            w(u'<ul>')

            for sid, session in sessions:

                w(u'<li>%s  (last usage: %s)<br/>' % (xml_escape(str(session)),

                                                      strftime('%Y-%m-%d %H:%M:%S',

                                                               localtime(session.timestamp))))

                dict_to_html(w, session.data)

                w(u'</li>')

            w(u'</ul>')

        else:

            w(u'<p>no server sessions found</p>')

        from cubicweb.web.application import SESSION_MANAGER

        w(u'<h1>web sessions</h1>')

        sessions = SESSION_MANAGER.current_sessions()

        if sessions:

            w(u'<ul>')

            for session in sessions:

                w(u'<li>%s (last usage: %s)<br/>' % (session.sessionid,

                                                     strftime('%Y-%m-%d %H:%M:%S',

                                                              localtime(session.last_usage_time))))

                dict_to_html(w, session.data)

                w(u'</li>')

            w(u'</ul>')

        else:

            w(u'<p>no web sessions found</p>')

class RegistryView(StartupView):

    __regid__ = 'registry'

    __select__ = StartupView.__select__ & match_user_groups('managers')

    title = _('registry')

    def call(self, **kwargs):

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

        self.w(u'<h1>%s</h1>' % _("Registry's content"))

        keys = sorted(self.vreg)

        self.w(u'<p>%s</p>\n' % ' - '.join('<a href="/_registry#%s">%s</a>'

                                           % (key, key) for key in keys))

        for key in keys:

            self.w(u'<h2><a name="%s">%s</a></h2>' % (key,key))

            items = self.vreg[key].items()

            if items:

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

                for key, value in sorted(items):

                    self.w(u'<tr><td>%s</td><td>%s</td></tr>'

                           % (key, xml_escape(repr(value))))

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

            else:

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