"""Specific views for schema related entities

:organization: Logilab

:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

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

"""

__docformat__ = "restructuredtext en"

from logilab.mtconverter import html_escape

from cubicweb.selectors import implements, rql_condition

from cubicweb.schemaviewer import SchemaViewer

from cubicweb.common.uilib import ureport_as_html

from cubicweb.common.view import EntityView

from cubicweb.web.views import baseviews

class ImageView(EntityView):

    id = 'image'

    title = _('image')

    def cell_call(self, row, col):

        entity = self.entity(row, col)

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

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

            html_escape(url),

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

class _SchemaEntityPrimaryView(baseviews.PrimaryView):

    show_attr_label = False

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

    def content_title(self, entity):

        return html_escape(entity.dc_long_title())

class EETypePrimaryView(_SchemaEntityPrimaryView):

    skip_attrs = _SchemaEntityPrimaryView.skip_attrs + ('name', 'meta', 'final')

class ERTypePrimaryView(_SchemaEntityPrimaryView):

    skip_attrs = _SchemaEntityPrimaryView.skip_attrs + ('name', 'meta', 'final',

                                                        'symetric', 'inlined')

class ErdefPrimaryView(_SchemaEntityPrimaryView):

    show_attr_label = True

class EETypeSchemaView(EETypePrimaryView):

    id = 'eschema'

    title = _('in memory entity schema')

    main_related_section = False

    skip_rels = ('is', 'is_instance_of', 'identity', 'created_by', 'owned_by',

                 'has_text',)

    def render_entity_attributes(self, entity, siderelations):

        super(EETypeSchemaView, self).render_entity_attributes(entity, siderelations)

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

        viewer = SchemaViewer(self.req)

        layout = viewer.visit_entityschema(eschema, skiprels=self.skip_rels)

        self.w(ureport_as_html(layout))

        if not eschema.is_final():

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

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

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

class ERTypeSchemaView(ERTypePrimaryView):

    id = 'eschema'

    title = _('in memory relation schema')

    main_related_section = False

    def render_entity_attributes(self, entity, siderelations):

        super(ERTypeSchemaView, self).render_entity_attributes(entity, siderelations)

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

        viewer = SchemaViewer(self.req)

        layout = viewer.visit_relationschema(rschema)

        self.w(ureport_as_html(layout))

        if not rschema.is_final():

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

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

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

class EETypeWorkflowView(EntityView):

    id = 'workflow'

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

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

        entity = self.entity(row, col)

        self.w(u'<h1>%s</h1>' % (self.req._('workflow for %s')

                                 % display_name(self.req, entity.name)))

        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)))

class EETypeOneLineView(baseviews.OneLineView):

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

        entity = self.entity(row, col)

        final = entity.final

        if final:

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

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

        if final:

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

from cubicweb.web.action import Action

class ViewWorkflowAction(Action):

    id = 'workflow'

    category = 'mainactions'

    title = _('view workflow')

    def url(self):

        entity = self.rset.get_entity(self.row or 0, self.col or 0)

        return entity.absolute_url(vid='workflow')