import sqlite3

from backend.app.database import DEFAULT_TAGS, apply_migrations, get_schema_version, seed_default_tags


def test_database_migrations_are_versioned_and_idempotent():
    connection = sqlite3.connect(':memory:')

    apply_migrations(connection)
    assert get_schema_version(connection) == 4
    tables = {
        row[0]
        for row in connection.execute(
            "SELECT name FROM sqlite_master WHERE type = 'table'"
        )
    }
    assert {
        'users', 'tokens', 'links', 'plugins', 'user_plugin_config', 'tags', 'link_tags'
    } <= tables
    columns = {row[1] for row in connection.execute('PRAGMA table_info(tags)')}
    assert 'created_by' in columns
    seed_default_tags(connection)
    seeded_tags = {row[0] for row in connection.execute('SELECT name FROM tags')}
    assert set(DEFAULT_TAGS) <= seeded_tags

    apply_migrations(connection)
    assert get_schema_version(connection) == 4

    connection.close()