"""Shared pytest configuration.

Puts the repository root on sys.path so tests can import the ``src`` package
from any working directory, and provides ``pg_url``: a throwaway PostgreSQL
schema for the database tests (stores, loaders). They need
TEST_DATABASE_URL -- the variable the Rust tests use, e.g.
postgres://postgres:ping@localhost:55432/ping -- and are skipped without it.
"""

import os
import sys
import uuid

import pytest

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


@pytest.fixture
def pg_url():
    """Connection string whose search_path is a fresh schema, dropped after."""
    base = os.environ.get("TEST_DATABASE_URL", "").strip()
    if not base:
        pytest.skip("TEST_DATABASE_URL not set (PostgreSQL test)")
    from sqlalchemy import create_engine, text

    if base.startswith("postgres://"):
        base = "postgresql://" + base[len("postgres://") :]
    schema = f"pytest_{uuid.uuid4().hex[:12]}"
    admin = create_engine(base)
    with admin.begin() as conn:
        conn.execute(text(f'CREATE SCHEMA "{schema}"'))
    sep = "&" if "?" in base else "?"
    try:
        yield f"{base}{sep}options=-csearch_path%3D{schema}"
    finally:
        with admin.begin() as conn:
            conn.execute(text(f'DROP SCHEMA "{schema}" CASCADE'))
        admin.dispose()