"""Specific views for schema related entities

: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 logilab.mtconverter import html_escape

from yams import schema2dot as s2d

from cubicweb.selectors import implements, yes

from cubicweb.schemaviewer import SchemaViewer

from cubicweb.view import EntityView, StartupView

from cubicweb.common import tags, uilib

from cubicweb.web import action

from cubicweb.web.views import TmpFileViewMixin, primary, baseviews, tabs

from cubicweb.web.facet import AttributeFacet

class ViewSchemaAction(action.Action):

    id = 'schema'

    __select__ = yes()

    title = _("site schema")

    category = 'siteactions'

    order = 30

    def url(self):

        return self.build_url(self.id)

class CWRDEFPrimaryView(primary.PrimaryView):

    __select__ = implements('CWAttribute', 'CWRelation')

    cache_max_age = 60*60*2 # stay in http cache for 2 hours by default

    def render_entity_title(self, entity):

        self.w(u'<h1><span class="etype">%s</span> %s</h1>'

               % (entity.dc_type().capitalize(),

                  html_escape(entity.dc_long_title())))

# CWEType ######################################################################

class CWETypeOneLineView(baseviews.OneLineView):

    __select__ = implements('CWEType')

    def cell_call(self, row, col, **kwargs):

        entity = self.entity(row, col)

        final = entity.final

        if final:

            self.w(u'<em class="finalentity">')

        super(CWETypeOneLineView, self).cell_call(row, col, **kwargs)

        if final:

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

class CWETypePrimaryView(tabs.TabsMixin, primary.PrimaryView):

    __select__ = implements('CWEType')

    title = _('in memory entity schema')

    main_related_section = False

    tabs = [_('cwetype-schema-text'), _('cwetype-schema-image'), 

            _('cwetype-schema-permissions'), _('cwetype-workflow')]

    default_tab = 'cwetype-schema-text'

    def render_entity(self, entity):

        self.render_entity_title(entity)

        self.w(u'<div>%s</div>' % entity.description)

        self.render_tabs(self.tabs, self.default_tab, entity)

class CWETypeSTextView(EntityView):

    id = 'cwetype-schema-text'

    __select__ = EntityView.__select__ & implements('CWEType')

    def cell_call(self, row, col):

        entity = self.entity(row, col)

        self.w(u'<h2>%s</h2>' % _('Attributes'))

        rset = self.req.execute('Any N,F,D,GROUP_CONCAT(C),I,J,DE,A '

                                'GROUPBY N,F,D,AA,A,I,J,DE '

                                'ORDERBY AA WHERE A is CWAttribute, '

                                'A ordernum AA, A defaultval D, '

                                'A constrained_by C?, A description DE, '

                                'A fulltextindexed I, A internationalizable J, '

                                'A relation_type R, R name N, '

                                'A to_entity O, O name F, '

                                'A from_entity S, S eid %(x)s',

                                {'x': entity.eid})

        self.wview('editable-table', rset, 'null', displayfilter=True)

        self.w(u'<h2>%s</h2>' % _('Relations'))

        rset = self.req.execute('Any N,C,F,M,K,D,A ORDERBY N '

                                'WITH N,C,F,M,D,K,A BEING ('

                                '(Any N,C,F,M,K,D,A '

                                'ORDERBY N WHERE A is CWRelation, '

                                'A description D, A composite K?, '

                                'A relation_type R, R name N, '

                                'A to_entity O, O name F, '

                                'A cardinality C, O meta M, '

                                'A from_entity S, S eid %(x)s)'

                                ' UNION '

                                '(Any N,C,F,M,K,D,A '

                                'ORDERBY N WHERE A is CWRelation, '

                                'A description D, A composite K?, '

                                'A relation_type R, R name N, '

                                'A from_entity S, S name F, '

                                'A cardinality C, S meta M, '

                                'A to_entity O, O eid %(x)s))'

                                ,{'x': entity.eid})

        self.wview('editable-table', rset, 'null', displayfilter=True)

class CWETypeSImageView(EntityView):

    id = 'cwetype-schema-image'

    __select__ = EntityView.__select__ & implements('CWEType')

    def cell_call(self, row, col):

        entity = self.entity(row, col)

        url = entity.absolute_url(vid='schemagraph')

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

            html_escape(url),

            html_escape(self.req._('graphical schema for %s') % entity.name)))

class CWETypeSPermView(EntityView):

    id = 'cwetype-schema-permissions'

    __select__ = EntityView.__select__ & implements('CWEType')

    def cell_call(self, row, col):

        entity = self.entity(row, col)

        self.w(u'<h2>%s</h2>' % _('Add permissions'))

        rset = self.req.execute('Any P WHERE X add_permission P, '

                                'X eid %(x)s', 

                                {'x': entity.eid})

        self.wview('outofcontext', rset, 'null')

        self.w(u'<h2>%s</h2>' % _('Read permissions'))

        rset = self.req.execute('Any P WHERE X read_permission P, '

                                'X eid %(x)s', 

                                {'x': entity.eid})

        self.wview('outofcontext', rset, 'null')

        self.w(u'<h2>%s</h2>' % _('Update permissions'))

        rset = self.req.execute('Any P WHERE X update_permission P, '

                                'X eid %(x)s', 

                                {'x': entity.eid})

        self.wview('outofcontext', rset, 'null')

        self.w(u'<h2>%s</h2>' % _('Delete permissions'))

        rset = self.req.execute('Any P WHERE X delete_permission P, '

                                'X eid %(x)s', 

                                {'x': entity.eid})

        self.wview('outofcontext', rset, 'null')

class CWETypeSWorkflowView(EntityView):

    id = 'cwetype-workflow'

    __select__ = EntityView.__select__ & implements('CWEType')

    def cell_call(self, row, col):

        entity = self.entity(row, col)

        if entity.reverse_state_of:

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

                    html_escape(entity.absolute_url(vid='ewfgraph')),

                    html_escape(self.req._('graphical workflow for %s') % entity.name)))

        else:

            self.w(u'<p>%s</p>' % _('There is no workflow defined for this entity.'))

# CWRType ######################################################################

class CWRTypeSchemaView(primary.PrimaryView):

    __select__ = implements('CWRType')

    title = _('in memory relation schema')

    main_related_section = False

    def render_entity_attributes(self, entity):

        super(CWRTypeSchemaView, self).render_entity_attributes(entity)

        rschema = self.vreg.schema.rschema(entity.name)

        viewer = SchemaViewer(self.req)

        layout = viewer.visit_relationschema(rschema)

        self.w(uilib.ureport_as_html(layout))

        if not rschema.is_final():

            msg = self.req._('graphical schema for %s') % entity.name

            self.w(tags.img(src=entity.absolute_url(vid='schemagraph'),

                            alt=msg))

# schema images ###############################################################

        self.req = req

    pass

    pass

    pass

class SchemaImageView(TmpFileViewMixin, StartupView):

    id = 'schemagraph'

    def _generate(self, tmpfile):

        """display global schema information"""

        skipmeta = not int(self.req.form.get('withmeta', 0))

class CWETypeSchemaImageView(TmpFileViewMixin, EntityView):

    id = 'schemagraph'

    __select__ = implements('CWEType')

    content_type = 'image/png'

    def _generate(self, tmpfile):

        """display schema information for an entity"""

        entity = self.entity(self.row, self.col)

        eschema = self.vreg.schema.eschema(entity.name)

class CWRTypeSchemaImageView(CWETypeSchemaImageView):

    __select__ = implements('CWRType')

    def _generate(self, tmpfile):

        """display schema information for an entity"""

        entity = self.entity(self.row, self.col)

        rschema = self.vreg.schema.rschema(entity.name)

        visitor = OneHopRSchemaVisitor(self.req, rschema)

### facets

class CWMetaFacet(AttributeFacet):

    id = 'cwmeta-facet'

    __select__ = AttributeFacet.__select__ & implements('CWEType')

    rtype = 'meta'

class CWFinalFacet(AttributeFacet):

    id = 'cwfinal-facet'

    __select__ = AttributeFacet.__select__ & implements('CWEType')

    rtype = 'final'