from django_elasticsearch_dsl import Document, Index, fields
from elasticsearch_dsl import analyzer, token_filter

from .models import Stage
from .statics import PAYS_OPTIONS

PAYS_DICT = dict(PAYS_OPTIONS)

stage = Index("stages")
stage.settings(number_of_shards=1, number_of_replicas=0)

text_analyzer = analyzer(
    "default",
    tokenizer="standard",
    filter=[
        "lowercase",
        "asciifolding",
        token_filter("frstop", type="stop", stopwords="_french_"),
        token_filter("frsnow", type="snowball", language="French"),
    ],
)
stage.analyzer(text_analyzer)


@stage.doc_type
class StageDocument(Document):
    lieux = fields.ObjectField(
        properties={
            "nom": fields.TextField(),
            "ville": fields.TextField(),
            "pays": fields.TextField(),
        }
    )
    auteur = fields.ObjectField(
        properties={
            "nom": fields.TextField(),
        }
    )
    thematiques = fields.TextField()
    matieres = fields.TextField()
    
    class Django:
        model = Stage
        fields = [
            "sujet",
            "encadrants",
            "type_stage",
            "niveau_scol",
            "structure",
            "date_debut",
            "date_fin",
        ]

    def prepare_thematiques(self, instance):
        return ", ".join(
            instance.thematiques.all().values_list("name", flat=True)
        ).lower()

    def prepare_matieres(self, instance):
        return ", ".join(instance.matieres.all().values_list("nom", flat=True)).lower()

    def prepare_niveau_scol(self, instance):
        return instance.get_niveau_scol_display().lower()

    def prepare_type_stage(self, instance):
        return instance.type_stage_fancy.lower()

    def prepare_date_fin(self, instance):
        return instance.date_fin.year

    def prepare_date_debut(self, instance):
        return instance.date_debut.year

    def prepare_sujet(self, instance):
        return instance.sujet.lower()

    # Hook pour l'affichage des noms de pays
    def prepare(self, instance):
        data = super(StageDocument, self).prepare(instance)

        for lieu in data["lieux"]:
            lieu["pays"] = PAYS_DICT[lieu["pays"]].lower()
        return data