from rest_framework import serializers
from .models import *


class UtilisateurSerializer(serializers.ModelSerializer):
    # Référencer ClasseSerializer sous forme de chaîne de caractères
    classe = serializers.SerializerMethodField()

    class Meta:
        model = Utilisateur
        fields = ['id', 'first_name', 'last_name', 'email', 'phone', 'n_appogie', 'classe']

    def get_classe(self, obj):
        from .serializers import ClasseSerializer  # Importation locale pour éviter la dépendance circulaire
        return ClasseSerializer(obj.classe).data if obj.classe else None


class ClasseSerializer(serializers.ModelSerializer):
    enseignant_responsable = UtilisateurSerializer(read_only=True)

    class Meta:
        model = Classe
        fields = ['id', 'nom', 'enseignant_responsable']

class MatiereSerializer(serializers.ModelSerializer):
    classe = ClasseSerializer(read_only=True) 
    classe_id = serializers.PrimaryKeyRelatedField(
        queryset=Classe.objects.all(),
        source='classe',
        write_only=True
    )
    enseignant = UtilisateurSerializer(read_only=True)  
    enseignant_id = serializers.PrimaryKeyRelatedField(
        queryset=Utilisateur.objects.filter(user_type='teacher'),
        source='enseignant',
        write_only=True
    )

    class Meta:
        model = Matiere
        fields = ['id', 'nom', 'coefficient', 'semestre', 'classe', 'classe_id', 'enseignant', 'enseignant_id']


class EnseignantSerializer(serializers.ModelSerializer):
    nom = serializers.SerializerMethodField()
    
    class Meta:
        model = Utilisateur
        fields = ['id', 'username', 'first_name', 'last_name', 'nom']
    
    def get_nom(self, obj):
        return f"{obj.first_name} {obj.last_name}" if obj.first_name or obj.last_name else obj.username


class AffectationSerializer(serializers.ModelSerializer):
    classe_nom = serializers.CharField(source='classe.nom', read_only=True)
    
    class Meta:
        model = Matiere
        fields = ['nom', 'classe_nom']


class EnseignantSerializer(serializers.ModelSerializer):
    affectations = AffectationSerializer(many=True, source='matieres_enseignees', read_only=True)
    
    class Meta:
        model = Utilisateur
        fields = ['id', 'first_name', 'last_name', 'email', 'phone', 'affectations']
        

class NoteSerializer(serializers.ModelSerializer):
    matiere = MatiereSerializer(read_only=True)
    class Meta:
        model = Note
        fields = ['id', 'etudiant', 'matiere', 'note_module', 'note_devoir_projet', 'assiduite', 'presence','date_ajout']

class PerformanceSerializer(serializers.ModelSerializer):
    class Meta:
        model = Performance
        fields = '__all__'


class AlerteSerializer(serializers.ModelSerializer):
    class Meta:
        model = Alerte
        fields = '__all__'


class RecommandationSerializer(serializers.ModelSerializer):
    date_creation = serializers.DateTimeField(format="%Y-%m-%dT%H:%M:%SZ")
    class Meta:
        model = Recommandation
        fields = '__all__'