"""Offscreen tests for the Inventory window (read-only management view)."""
import os

import pytest

os.environ.setdefault("QT_QPA_PLATFORM", "offscreen")
pytest.importorskip("PySide6")

from PySide6.QtWidgets import QApplication  # noqa: E402

from woodshop import inventory as I  # noqa: E402
from woodshop.gui.inventory_window import InventoryWindow  # noqa: E402

_app = QApplication.instance() or QApplication([])


def test_window_renders_ledger(tmp_path, monkeypatch):
    monkeypatch.setenv("XDG_DATA_HOME", str(tmp_path / "data"))
    led = I.Ledger()
    led.purchase("2x4", 5, price=3.98)
    led.record_build("table", 2, consumed={"2x4": 2}, offcuts=[
        {"stock": "2x4", "length_in": 30, "width_in": 3.5, "is_sheet": False}],
        dispositions=["keep"])
    led.save()
    w = InventoryWindow()
    assert "2x4" in w._tabs["On-hand"].toPlainText()
    assert "OFFCUT" in w._tabs["Offcut bin"].toPlainText()
    assert "table" in w._tabs["Build history"].toPlainText()
    stats = w._tabs["Stats"].toPlainText()
    assert "Units built" in stats and "2" in stats


def test_empty_ledger_renders(tmp_path, monkeypatch):
    monkeypatch.setenv("XDG_DATA_HOME", str(tmp_path / "data"))
    w = InventoryWindow()
    assert "empty" in w._tabs["On-hand"].toPlainText().lower()
    assert "no builds" in w._tabs["Build history"].toPlainText().lower()