from logilab.mtconverter import html_escape

from cubicweb.common.view import StartupView

from cubicweb.common.view import EntityView

_ = unicode

OWL_CARD_MAP = {'1': '<rdf:type rdf:resource="&owl;FunctionalProperty"/>',                      

                '?': '<owl:maxCardinality rdf:datatype="&xsd;int">1</owl:maxCardinality>',

                '+': '<owl:minCardinality rdf:datatype="&xsd;int">1</owl:minCardinality>',

                '*': ''

                }

OWL_CARD_MAP_DATA = {'String': 'xsd:string',

                     'Datetime': 'xsd:dateTime',

                     'Bytes': 'xsd:byte',

                     'Float': 'xsd:float',

                     'Boolean': 'xsd:boolean',

                     'Int': 'xsd:int',

                     'Date':'xsd:date',

                     'Time': 'xsd:time',

                     'Password': 'xsd:byte',

                     'Decimal' : 'xsd:decimal',

                     'Interval': 'xsd:duration'

                     }

OWL_OPENING_ROOT = u'''<?xml version="1.0" encoding="UTF-8"?>

        <!DOCTYPE rdf:RDF [

        <!ENTITY owl "http://www.w3.org/2002/07/owl#" >

        <!ENTITY xsd "http://www.w3.org/2001/XMLSchema#" >

        <!ENTITY rdfs "http://www.w3.org/2000/01/rdf-schema#" >

        <!ENTITY rdf "http://www.w3.org/1999/02/22-rdf-syntax-ns#" >

        <!ENTITY %s "http://logilab.org/owl/ontologies/%s#" >

        ]>        

        <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"

            xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"

            xmlns:xsd="http://www.w3.org/2001/XMLSchema#"

            xmlns:owl="http://www.w3.org/2002/07/owl#"

            xmlns="http://logilab.org/owl/ontologies/%s#"

            xmlns:%s="http://logilab.org/owl/ontologies/%s#"

            xmlns:base="http://logilab.org/owl/ontologies/%s">

    <owl:Ontology rdf:about="">

        <rdfs:comment>

        %s Cubicweb OWL Ontology                           

        </rdfs:comment>

   </owl:Ontology>'''

OWL_CLOSING_ROOT = u'</rdf:RDF>'

class OWLView(StartupView):

    """This view export in owl format the whole cubicweb ontologie. First part is the TBOX, second part is an ABOX ligth version."""

    id = 'owl'

    title = _('owl (tbox+abox)')

    templatable =False

    content_type = 'application/xml' # 'text/xml'

    def call(self):

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

        self.w(OWL_OPENING_ROOT % (self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name))

        self.wview('tbox', None, writeprefix=False)

        entities = [eschema for eschema in self.schema.entities()

                    if not eschema.is_final()]

        if skipmeta:

            entities = [eschema for eschema in entities

                        if not eschema.meta]

        for entity in entities:

            rql = 'Any X where X is %s'

            rset = self.req.execute(rql% entity)

            if rset:

                self.wview('owlaboxlight', rset, writeprefix=False)

        self.w(OWL_CLOSING_ROOT)

class TBoxView(StartupView):

    """This view export in owl format schema database. It is the TBOX"""

    id = 'tbox'

    title = _('tbox')

    templatable =False

    content_type = 'application/xml' # 'text/xml'

    def call(self, writeprefix=True):

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

        if writeprefix:

            self.w(OWL_OPENING_ROOT % (self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name) )

        self.visit_schema(display_relations=True,

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

                                       'owned_by', 'created_by'),

                             skipmeta=skipmeta)

        if writeprefix:

            self.w(OWL_CLOSING_ROOT)

    def visit_schema(self, display_relations=0,

                     skiprels=(), skipmeta=True):

        """get a layout for a whole schema"""

        entities = [eschema for eschema in self.schema.entities()

                    if not eschema.is_final()]

        if skipmeta:

            entities = [eschema for eschema in entities

                        if not eschema.meta]

        keys = [(eschema.type, eschema) for eschema in entities]

        self.w(u'<!-- classes definition -->')

        for key, eschema in sorted(keys):

            self.visit_entityschema(eschema, skiprels)

        self.w(u'<!-- property definition -->')

        self.w(u'<!-- object property -->')

        for key, eschema in sorted(keys):

             self.visit_property_schema(eschema, skiprels)

        self.w(u'<!-- datatype property -->')

        for key, eschema in sorted(keys):

            self.visit_property_object_schema(eschema, skiprels)

    def stereotype(self, name):

        return Span((' <<%s>>' % name,), klass='stereotype')

    def visit_entityschema(self, eschema, skiprels=()):

        """get a layout for an entity OWL schema"""

        etype = eschema.type

        if eschema.meta:

            self.stereotype('meta')

            self.w(u'''<owl:Class rdf:ID="%s"><rdfs:subClassOf rdf:resource="http://www.w3.org/2002/07/owl#Thing"/>

                                '''%eschema, stereotype)

        else:

             self.w(u'''<owl:Class rdf:ID="%s"><rdfs:subClassOf rdf:resource="http://www.w3.org/2002/07/owl#Thing"/>

                                '''% eschema)         

        self.w(u'<!-- relations -->')    

        for rschema, targetschemas, role in eschema.relation_definitions():

            if rschema.type in skiprels:

                continue

            if not (rschema.has_local_role('read') or rschema.has_perm(self.req, 'read')):

                continue

            for oeschema in targetschemas:

                label = rschema.type

                if role == 'subject':

                    card = rschema.rproperty(eschema, oeschema, 'cardinality')[0]

                else:

                    card = rschema.rproperty(oeschema, eschema, 'cardinality')[1]

                self.w(u'''<rdfs:subClassOf>

                              <owl:Restriction>

                              <owl:onProperty rdf:resource="#%s"/>

                                %s

                              </owl:Restriction>

                           </rdfs:subClassOf>

                                ''' % (label, OWL_CARD_MAP[card]))

        self.w(u'<!-- attributes -->')

        for rschema, aschema in eschema.attribute_definitions():

            if not (rschema.has_local_role('read') or rschema.has_perm(self.req, 'read')):

                continue

            aname = rschema.type

            if aname == 'eid':

                continue

            card_data = aschema.type

            self.w(u'''<rdfs:subClassOf>

                              <owl:Restriction>

                                 <owl:onProperty rdf:resource="#%s"/>

                                 <rdf:type rdf:resource="&owl;FunctionalProperty"/>

                                 </owl:Restriction>

                        </rdfs:subClassOf>'''

                   % aname)

        self.w(u'</owl:Class>')

    def visit_property_schema(self, eschema, skiprels=()):

        """get a layout for property entity OWL schema"""

        etype = eschema.type

        for rschema, targetschemas, role in eschema.relation_definitions():

            if rschema.type in skiprels:

                continue

            if not (rschema.has_local_role('read') or rschema.has_perm(self.req, 'read')):

                continue

            for oeschema in targetschemas:

                label = rschema.type

                self.w(u'''<owl:ObjectProperty rdf:ID="%s">

                              <rdfs:domain rdf:resource="#%s"/>

                              <rdfs:range rdf:resource="#%s"/>

                           </owl:ObjectProperty>                   

                                ''' % (label, eschema, oeschema.type ))

    def visit_property_object_schema(self, eschema, skiprels=()):

        for rschema, aschema in eschema.attribute_definitions():

            if not (rschema.has_local_role('read') or rschema.has_perm(self.req, 'read')):

                continue

            aname = rschema.type

            if aname == 'eid':

                continue

            card_data = aschema.type

            self.w(u'''<owl:DatatypeProperty rdf:ID="%s">

                          <rdfs:domain rdf:resource="#%s"/>

                          <rdfs:range rdf:resource="%s"/>

                       </owl:DatatypeProperty>'''

                   % (aname, eschema, OWL_CARD_MAP_DATA[card_data]))

class OWLABOXLightView(EntityView):

    '''This view represents the lihgt part of the ABOX for a given entity'''

    id = 'owlaboxlight'

    title = _('owlaboxlight')

    templatable =False

    accepts = ('Any',)

    content_type = 'application/xml' # 'text/xml'

    def call(self, writeprefix=True):

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

        if writeprefix:

            self.w(OWL_OPENING_ROOT % (self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name))

        for i in xrange(self.rset.rowcount):

            self.cell_call(i, 0, skiprels=('is', 'is_instance_of', 'identity',

                                       'owned_by', 'created_by'),

                             skipmeta=skipmeta)

        if writeprefix:

            self.w(OWL_CLOSING_ROOT)

    def cell_call(self, row, col, skiprels=(), skipmeta=True):

        entity = self.complete_entity(row, col)

        eschema = entity.e_schema

        self.w(u'<%s rdf:ID="%s">' % (eschema, entity.eid))

        self.w(u'</%s>'% eschema)

class OWLABOXEView(EntityView):

    '''This view represents a part of the ABOX for a given entity.'''

    id = 'owlabox'

    title = _('owlabox')

    templatable =False

    accepts = ('Any',)

    content_type = 'application/xml' # 'text/xml'

    def call(self, writeprefix=True):

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

        if writeprefix:

            self.w(OWL_OPENING_ROOT % (self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name, self.schema.name))

        for i in xrange(self.rset.rowcount):

            self.cell_call(i, 0, skiprels=('is', 'is_instance_of', 'identity',

                                       'owned_by', 'created_by'),

                             skipmeta=skipmeta)

        if writeprefix:

            self.w(OWL_CLOSING_ROOT)

    def cell_call(self, row, col, skiprels=(), skipmeta=True):

        entity = self.complete_entity(row, col)

        eschema = entity.e_schema

        self.w(u'<%s rdf:ID="%s">' % (eschema, entity.eid))

        self.w(u'<!--attributes-->')

        for rschema, aschema in eschema.attribute_definitions():

            if rschema.type in skiprels:

                continue

            if not (rschema.has_local_role('read') or rschema.has_perm(self.req, 'read')):

                continue

            aname = rschema.type

            if aname == 'eid':

                continue

            attr = getattr(entity, aname)

            if attr is not None:

                self.w(u'<%s>%s</%s>' % (aname, html_escape(unicode(attr)), aname))

        self.w(u'<!--relations -->')

        for rschema, targetschemas, role in eschema.relation_definitions():

            if rschema.type in skiprels:

                continue

            if not (rschema.has_local_role('read') or rschema.has_perm(self.req, 'read')):

                continue

            if role == 'object':

                attr = 'reverse_%s' % rschema.type 

            else:

                attr = rschema.type        

            for x in getattr(entity, attr):

                self.w(u'<%s>%s %s</%s>' % (attr, x.id, x.eid, attr))

        self.w(u'</%s>'% eschema)