"""Test environment bootstrap.

Cauldron's server module instantiates a DB + OAuth client + Mealie client at
import time, so tests must stub those before importing cauldron.server.

This module performs that stubbing exactly once (idempotent — safe to import
multiple times). Both pytest's conftest.py and direct `unittest discover`
runs route through here.
"""
import os
from unittest.mock import MagicMock, patch

from cryptography.fernet import Fernet


_BOOTSTRAPPED = False


def _stub_env() -> None:
    os.environ.setdefault("SECRET_KEY", "test-secret")
    os.environ.setdefault("MEALIE_BASE_URL", "http://mealie.test")
    os.environ.setdefault("MEALIE_API_TOKEN", "mealie-test-token")
    os.environ.setdefault("CLAWDFORGE_URL", "http://forge.test")
    os.environ.setdefault("CLAWDFORGE_TOKEN", "forge-test-token")
    os.environ.setdefault("ADMIN_BEARER", "admin-test-bearer")
    os.environ.setdefault("OIDC_ISSUER", "http://authentik.test/application/o/cauldron")
    os.environ.setdefault("OIDC_CLIENT_ID", "test-client")
    os.environ.setdefault("OIDC_CLIENT_SECRET", "test-secret-client")
    os.environ.setdefault("OIDC_REDIRECT_URI", "http://localhost/auth/callback")
    os.environ.setdefault("DB_HOST", "localhost")
    os.environ.setdefault("DB_NAME", "cauldron_test")
    os.environ.setdefault("DB_USER", "cauldron")
    os.environ.setdefault("DB_PASSWORD", "test")
    os.environ.setdefault("CAULDRON_FERNET_KEY", Fernet.generate_key().decode())


class _FakeCursor:
    def __init__(self):
        self.lastrowid = 0
        self.rowcount = 0
    def execute(self, *a, **kw): pass
    def fetchone(self): return None
    def fetchall(self): return []
    def __enter__(self): return self
    def __exit__(self, *a): return False


class _FakeConn:
    def __init__(self, *a, **kw): pass
    def cursor(self): return _FakeCursor()
    def commit(self): pass
    def rollback(self): pass
    def close(self): pass


def bootstrap() -> None:
    """Apply env + import-time monkey patches. Idempotent."""
    global _BOOTSTRAPPED
    if _BOOTSTRAPPED:
        return
    _stub_env()

    # pymysql.connect → no-op fake
    patch("pymysql.connect", _FakeConn).start()

    # Pre-import dotted modules so the next patches resolve
    import cauldron.db  # noqa: F401
    import cauldron.oidc  # noqa: F401
    import cauldron.foods  # noqa: F401

    # Skip migrations
    patch("cauldron.db.DB.migrate", lambda self: []).start()

    # Skip OIDC metadata fetch
    oauth_obj = MagicMock()
    oauth_obj.cauldron = MagicMock()
    patch("cauldron.oidc.init_oauth", lambda *a, **kw: oauth_obj).start()

    # Skip foods seed loader
    patch("cauldron.foods.load_seed_if_empty", lambda db: 0).start()

    _BOOTSTRAPPED = True


bootstrap()