import json

from testcontainers.postgres import PostgresContainer
from typer.testing import CliRunner

from tht.cli import app


def test_session_migrate_status_is_pristine_and_idempotent():
    with PostgresContainer("postgres:16-alpine") as postgres:
        database_url = postgres.get_connection_url()
        runner = CliRunner()

        before = runner.invoke(
            app, ["session", "migrate", "--database-url", database_url, "--status", "--json"]
        )
        assert before.exit_code == 0, before.output
        assert json.loads(before.stdout) == {"applied": [], "drifted": [], "pending": ["001", "002"]}
        assert before.stderr == ""

        first = runner.invoke(app, ["session", "migrate", "--database-url", database_url, "--json"])
        second = runner.invoke(app, ["session", "migrate", "--database-url", database_url, "--json"])

    expected = {"applied": ["001", "002"], "drifted": [], "pending": []}
    assert first.exit_code == 0, first.output
    assert second.exit_code == 0, second.output
    assert json.loads(first.stdout) == expected
    assert json.loads(second.stdout) == expected