from decimal import Decimal


def test_formatters_render_money_percent_and_empty_values():
    from grid_trading.ui.formatters import format_money, format_percent, format_price, format_quantity

    assert format_money(Decimal("1234.5")) == "1,234.50"
    assert format_price(Decimal("3.956")) == "3.96"
    assert format_percent(Decimal("0.1234")) == "12.34%"
    assert format_quantity(1200) == "1,200"
    assert format_money(None) == "-"


def test_main_window_can_be_constructed_offscreen(tmp_path, monkeypatch):
    monkeypatch.setenv("QT_QPA_PLATFORM", "offscreen")

    from PySide6.QtWidgets import QApplication

    from grid_trading.services.trading_service import TradingService
    from grid_trading.ui.main_window import MainWindow

    app = QApplication.instance() or QApplication([])
    service = TradingService(tmp_path / "grid.db")
    window = MainWindow(service)

    assert window.windowTitle() == "Grid Trading Manager"
    assert window.holdings_table.columnCount() > 0

    window.close()
    service.close()
    app.processEvents()