import os
import shutil
import pytest
from fastapi.testclient import TestClient
from sqlmodel import Session, SQLModel, create_engine, select
from sqlmodel.pool import StaticPool  
from database.exercices.models import Exercice
from main import app

from database.db import get_session
import json
import pydantic.json


def _custom_json_serializer(*args, **kwargs) -> str:
    """
    Encodes json in the same way that pydantic does.
    """
    return json.dumps(*args, default=pydantic.json.pydantic_encoder, **kwargs)


@pytest.fixture(name="session")   
def session_fixture():   
    engine = create_engine(
        "sqlite://", connect_args={"check_same_thread": False}, poolclass=StaticPool, echo=False, json_serializer=_custom_json_serializer
    )
    SQLModel.metadata.create_all(engine)
    with Session(engine) as session:
        yield session   
        #cleanup uploads
        exos = session.exec(select(Exercice)).all()
        for e in exos:
            try:
                shutil.rmtree(os.path.join('uploads', e.id_code))
            except:
                pass

@pytest.fixture(name="client")   
def client_fixture(session: Session):   

    def get_session_override():   
        return session

    app.dependency_overrides[get_session] = get_session_override  

    client = TestClient(app)  

    yield client  

    app.dependency_overrides.clear()