"""pytest 全局配置：确保项目根目录在 sys.path，并提供 SQLite 内存库 fixture。"""
import os
import sys

import pytest
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.pool import StaticPool

PROJECT_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
if PROJECT_ROOT not in sys.path:
    sys.path.insert(0, PROJECT_ROOT)


@pytest.fixture
def sqlite_db():
    """SQLite 内存库会话 fixture：隔离的 service/repository 测试环境。

    将独立会话注入 core.database._db_ctx，测试结束后恢复并清理。
    不触碰真实 MySQL/Redis。
    """
    from core.database import Base, _db_ctx

    engine = create_engine(
        "sqlite://",
        connect_args={"check_same_thread": False},
        poolclass=StaticPool,
    )
    Base.metadata.create_all(engine)
    session = sessionmaker(bind=engine)()

    token = _db_ctx.set(session)
    try:
        yield session
    finally:
        _db_ctx.reset(token)
        session.close()
        engine.dispose()