"""Exercise the model configuration Alembic migration against a real SQLite file."""

from pathlib import Path

from alembic import command
from alembic.config import Config
from sqlalchemy import create_engine, inspect, text


def test_model_config_migration_upgrades_existing_database(tmp_path: Path, monkeypatch):
    from agenteval.storage import db as db_module

    database_url = f"sqlite:///{tmp_path / 'migration.db'}"
    monkeypatch.setattr(db_module, "DATABASE_URL", database_url)
    config = Config(str(Path(__file__).resolve().parents[2] / "alembic.ini"))

    legacy_engine = create_engine(database_url)
    with legacy_engine.begin() as connection:
        connection.execute(text("CREATE TABLE scenarios (id VARCHAR PRIMARY KEY, name VARCHAR NOT NULL)"))
        connection.execute(text("CREATE TABLE eval_results (id VARCHAR PRIMARY KEY, run_id VARCHAR NOT NULL)"))
        connection.execute(
            text(
                "CREATE TABLE eval_runs (id VARCHAR PRIMARY KEY, target_id VARCHAR NOT NULL, "
                "scenario_id VARCHAR NOT NULL)"
            )
        )
        connection.execute(text("CREATE TABLE turns (id VARCHAR PRIMARY KEY, run_id VARCHAR NOT NULL)"))

    command.upgrade(config, "df320ecde84f")
    before = inspect(create_engine(database_url)).get_table_names()
    assert "model_configs" not in before

    command.upgrade(config, "head")
    inspector = inspect(create_engine(database_url))
    assert "model_configs" in inspector.get_table_names()
    assert "scenario_model_bindings" in inspector.get_table_names()
    assert {column["name"] for column in inspector.get_columns("model_configs")} >= {
        "name",
        "capability",
        "endpoint_url",
        "api_key_encrypted",
    }