import unittest
import rdflib
from rdflib import ConjunctiveGraph
from rdflib import Literal
from rdflib.namespace import SKOS
from rdflib import RDFS
from rdflib import URIRef


class TestPrefLabel(unittest.TestCase):
    def setUp(self):
        self.g = ConjunctiveGraph()
        self.u = URIRef("http://example.com/foo")
        self.g.add([self.u, RDFS.label, Literal("foo")])
        self.g.add([self.u, RDFS.label, Literal("bar")])

    def test_default_label_sorting(self):
        res = sorted(self.g.preferredLabel(self.u))
        tgt = [
            (
                rdflib.term.URIRef("http://www.w3.org/2000/01/rdf-schema#label"),
                rdflib.term.Literal("bar"),
            ),
            (
                rdflib.term.URIRef("http://www.w3.org/2000/01/rdf-schema#label"),
                rdflib.term.Literal("foo"),
            ),
        ]
        self.assertEqual(res, tgt)

    def test_default_preflabel_sorting(self):
        self.g.add([self.u, SKOS.prefLabel, Literal("bla")])
        res = self.g.preferredLabel(self.u)
        tgt = [
            (
                rdflib.term.URIRef("http://www.w3.org/2004/02/skos/core#prefLabel"),
                rdflib.term.Literal("bla"),
            )
        ]
        self.assertEqual(res, tgt)

    def test_preflabel_lang_sorting_no_lang_attr(self):
        self.g.add([self.u, SKOS.prefLabel, Literal("bla")])
        self.g.add([self.u, SKOS.prefLabel, Literal("blubb", lang="en")])
        res = sorted(self.g.preferredLabel(self.u))
        tgt = [
            (
                rdflib.term.URIRef("http://www.w3.org/2004/02/skos/core#prefLabel"),
                rdflib.term.Literal("bla"),
            ),
            (
                rdflib.term.URIRef("http://www.w3.org/2004/02/skos/core#prefLabel"),
                rdflib.term.Literal("blubb", lang="en"),
            ),
        ]

        self.assertEqual(res, tgt)

    def test_preflabel_lang_sorting_empty_lang_attr(self):
        self.g.add([self.u, SKOS.prefLabel, Literal("bla")])
        self.g.add([self.u, SKOS.prefLabel, Literal("blubb", lang="en")])
        res = self.g.preferredLabel(self.u, lang="")
        tgt = [
            (
                rdflib.term.URIRef("http://www.w3.org/2004/02/skos/core#prefLabel"),
                rdflib.term.Literal("bla"),
            )
        ]
        self.assertEqual(res, tgt)

    def test_preflabel_lang_sorting_en_lang_attr(self):
        self.g.add([self.u, SKOS.prefLabel, Literal("blubb", lang="en")])
        res = self.g.preferredLabel(self.u, lang="en")
        tgt = [
            (
                rdflib.term.URIRef("http://www.w3.org/2004/02/skos/core#prefLabel"),
                rdflib.term.Literal("blubb", lang="en"),
            )
        ]
        self.assertEqual(res, tgt)