"""Tests for configuration and SQL loading."""

from app.config import SQL_DIR, Settings, load_sql


class TestSettings:
    """Tests for the Settings class."""

    def test_default_values(self):
        s = Settings()
        assert s.POSTGRES_HOST in ("localhost", s.POSTGRES_HOST)
        assert s.POSTGRES_PORT == int(s.POSTGRES_PORT)
        assert s.K_FACTOR > 0
        assert s.DEFAULT_ELO > 0

    def test_database_url_format(self):
        s = Settings()
        url = s.database_url
        assert url.startswith("postgresql+psycopg2://")
        assert str(s.POSTGRES_HOST) in url


class TestLoadSql:
    """Tests for the SQL file loader."""

    def test_sql_dir_exists(self):
        assert SQL_DIR.is_dir()

    def test_all_sql_files_exist(self):
        expected = [
            "listing_select.sql",
            "recent_pairs.sql",
            "history.sql",
            "count_comparisons.sql",
            "count_rated.sql",
            "count_listings.sql",
            "elo_aggregates.sql",
            "elo_distribution.sql",
            "listing_images.sql",
        ]
        for name in expected:
            assert (SQL_DIR / name).is_file(), f"Missing SQL file: {name}"

    def test_load_sql_substitutes_schemas(self):
        sql = load_sql("listing_select.sql")
        # Should not contain any unresolved placeholders
        assert "{" not in sql
        assert "}" not in sql

    def test_load_sql_returns_string(self):
        sql = load_sql("count_comparisons.sql")
        assert isinstance(sql, str)
        assert "count" in sql.lower()