"""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), all rights reserved.

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

"""

__docformat__ = "restructuredtext en"

from logilab.common.textutils import unormalize

from logilab.mtconverter import html_escape

from cubicweb.view import StartupView

from cubicweb.common.uilib import ureport_as_html, ajax_replace_url

from cubicweb.web.httpcache import EtagHTTPCacheManager

_ = unicode

class ManageView(StartupView):

    id = 'manage'

    title = _('manage')    

    http_cache_manager = EtagHTTPCacheManager

    def display_folders(self):

        return False

    def call(self, **kwargs):

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

        self.req.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.req

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

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

            rset = self.req.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">&nbsp;</div>')

            self.startup_views()

        if manager and 'Card' in self.schema:

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

            if rset:

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

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

            else:

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

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

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

    def folders(self):

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

        self.vreg.select_view('tree', self.req, None).dispatch(w=self.w)

    def startup_views(self):

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

        self.startupviews_table()

    def startupviews_table(self):

        for v in self.vreg.possible_views(self.req, None):

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

                continue

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

                html_escape(v.url()), html_escape(self.req._(v.title).capitalize())))

    def entities(self):

        schema = self.schema

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

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

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

        if manager:

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

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

                                if not eschema.meta and not eschema.is_subobject(strict=True))

        if manager: 

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

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

                                    if eschema.meta and not eschema.schema_entity())

            if 'CWAttribute' in schema: # check schema support

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

                self.entity_types_table(schema.eschema(etype)

                                        for etype in schema.schema_entity_types())

        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.req

        for eschema in eschemas:

            if eschema.is_final() or (not eschema.has_perm(req, 'read') and

                                      not eschema.has_local_role('read')):

                continue

            etype = eschema.type

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

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

            if nb > 1:

                view = self.vreg.select_view('list', req, req.etype_rset(etype))

                url = view.url()

            else:

                url = self.build_url('view', rql='%s X' % etype)

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

                html_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>]' % (

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

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

class IndexView(ManageView):

    id = 'index'

    title = _('index')

    def display_folders(self):

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

class SchemaView(StartupView):

    id = 'schema'

    title = _('application schema')

    def call(self):

        """display schema information"""

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

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

        withmeta = int(self.req.form.get('withmeta', 0))

        self.w(u'<img src="%s" alt="%s"/>\n' % (

            html_escape(self.req.build_url('view', vid='schemagraph', withmeta=withmeta)),

            self.req._("graphical representation of the application'schema")))

        if withmeta:

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

                self.build_url('schema', withmeta=0),

                self.req._('hide meta-data')))

        else:

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

                self.build_url('schema', withmeta=1),

                self.req._('show meta-data')))

        self.w(u'<div id="detailed_schema"><a href="%s">%s</a></div>' %

               (html_escape(ajax_replace_url('detailed_schema', '', 'schematext',

                                             skipmeta=int(not withmeta))),

                self.req._('detailed schema view')))

class SchemaUreportsView(StartupView):

    id = 'schematext'

    def call(self):

        from cubicweb.schemaviewer import SchemaViewer

        skipmeta = int(self.req.form.get('skipmeta', True))

        schema = self.schema

        viewer = SchemaViewer(self.req)

        layout = viewer.visit_schema(schema, display_relations=True,

                                     skiprels=('is', 'is_instance_of', 'identity',

                                               'owned_by', 'created_by'),

                                     skipmeta=skipmeta)

        self.w(ureport_as_html(layout))