"""Shared pytest fixtures.

Tests run against a throwaway SQLite database (fast, zero external services).
The production path is Postgres via Alembic; ``make migrate-check`` smoke-tests
the migration chain on SQLite in CI.
All fixture data is invented — never real merchant or account data.
"""

from __future__ import annotations

import os
from pathlib import Path

import pytest

# Config must see the test DB before cayceops.config/db get imported.
os.environ.setdefault("CAYCE_OPS_DATABASE_URL", "sqlite:///:memory:")
os.environ.setdefault("CAYCE_OPS_AUTONOMOUS_MODE", "false")


@pytest.fixture()
def db_engine(tmp_path: Path):
    """A fresh schema per test, on a file-backed SQLite DB (shared in-process)."""
    from sqlalchemy import create_engine
    from sqlalchemy.orm import sessionmaker

    from cayceops.db import reset_engine
    from cayceops.models import Base

    url = f"sqlite:///{tmp_path}/test.db"
    eng = create_engine(url, future=True, connect_args={"check_same_thread": False})
    Base.metadata.create_all(eng)
    factory = sessionmaker(bind=eng, expire_on_commit=False, future=True)

    # point the app at the same engine/session factory
    reset_engine()
    import cayceops.db as appdb

    appdb._engine = eng
    appdb._factory = factory
    yield eng
    eng.dispose()
    reset_engine()


@pytest.fixture()
def sess(db_engine):
    """A session bound to the fresh schema (rolls back at test end)."""
    import cayceops.db as appdb

    s = appdb.session_factory()()
    yield s
    s.rollback()
    s.close()


@pytest.fixture()
def cfg(monkeypatch):
    """A Config snapshot with test defaults (no network, no autonomy)."""
    from cayceops.config import Config

    defaults = {
        "CAYCE_OPS_DATABASE_URL": "sqlite:///:memory:",
        "CAYCE_OPS_LLM_PROVIDER": "null",
        "CAYCE_OPS_ENABLE_FACEBOOK": "false",
        "CAYCE_OPS_ENABLE_INSTAGRAM": "false",
        "CAYCE_OPS_NOSTR_RELAYS": "",
        "CAYCE_OPS_MEDIA_DIR": "media",
    }

    def _apply(**overrides):
        merged = {**defaults, **{k: str(v) for k, v in overrides.items()}}
        for k, v in merged.items():
            monkeypatch.setenv(k, v)
        return Config()

    return _apply