import pytest
import tempfile
import os
from datetime import date
from app import create_app
from models import db, Student, StudentEnrollment


@pytest.fixture
def app():
    db_fd, db_path = tempfile.mkstemp()
    
    app = create_app('testing')
    app.config.update({
        'TESTING': True,
        'SQLALCHEMY_DATABASE_URI': f'sqlite:///{db_path}',
        'WTF_CSRF_ENABLED': False,
    })
    
    with app.app_context():
        db.create_all()
        yield app
        db.drop_all()
    
    os.close(db_fd)
    os.unlink(db_path)


@pytest.fixture
def client(app):
    return app.test_client()


def create_student_with_enrollment(first_name, last_name, class_group_id, email=None, enrollment_date=None):
    """
    Helper pour créer un étudiant avec inscription temporelle.
    Utilise le nouveau système temporel au lieu de l'ancien class_group_id.
    """
    if enrollment_date is None:
        enrollment_date = date(2023, 9, 1)  # Date par défaut de rentrée
    
    # Créer l'étudiant sans class_group_id
    student = Student(first_name=first_name, last_name=last_name, email=email)
    db.session.add(student)
    db.session.flush()  # Pour obtenir l'ID
    
    # Créer l'inscription temporelle
    enrollment = StudentEnrollment(
        student_id=student.id,
        class_group_id=class_group_id,
        enrollment_date=enrollment_date
    )
    db.session.add(enrollment)
    
    return student


@pytest.fixture
def runner(app):
    return app.test_cli_runner()