"""Pytest configuration for the paper-dynasty-database test suite.

Sets DATABASE_TYPE=postgresql before any app module is imported so that
db_engine.py sets SKIP_TABLE_CREATION=True and does not try to mutate the
production SQLite file during test collection.  Each test module is
responsible for binding models to its own in-memory database.
"""

import os

import psycopg2
import pytest

os.environ["DATABASE_TYPE"] = "postgresql"
# Provide dummy credentials so PooledPostgresqlDatabase can be instantiated
# without raising a configuration error (it will not actually be used).
os.environ.setdefault("POSTGRES_PASSWORD", "test-dummy")


@pytest.fixture(scope="session")
def pg_conn():
    """Live PostgreSQL connection for integration tests.

    Requires POSTGRES_HOST to be set; runs the migration before yielding the
    connection so that all integration tests start from a migrated schema.
    The connection is rolled back and closed at session teardown so that the
    migration is not persisted to the dev database between test runs.
    """
    conn = psycopg2.connect(
        host=os.environ["POSTGRES_HOST"],
        dbname=os.environ.get("POSTGRES_DB", "pd_master"),
        user=os.environ.get("POSTGRES_USER", "pd_admin"),
        password=os.environ["POSTGRES_PASSWORD"],
        port=int(os.environ.get("POSTGRES_PORT", "5432")),
    )
    conn.autocommit = False
    migration_path = os.path.join(
        os.path.dirname(__file__),
        "..",
        "migrations",
        "2026-03-12_add_evolution_tables.sql",
    )
    with open(migration_path) as fh:
        conn.cursor().execute(fh.read())
    conn.commit()
    yield conn
    conn.rollback()
    conn.close()