"""
Tests for ``bal.gui.qt.common``.

Covers shown_cv, add_widget, log_error, export_meta_gui (and the
CheckAliveError exception, which now lives in ``bal.core.checkalive``).

Run:
    QT_QPA_PLATFORM=offscreen python3 tests/test_gui_common.py
"""

import sys

sys.path.insert(0, __file__.rsplit("/", 2)[0])

from PyQt6.QtWidgets import QApplication, QGridLayout, QLabel

# Import the module itself, not via "from .common import *"
import bal.gui.qt.common as common

_app = QApplication.instance() or QApplication(sys.argv)


# ------------------------------------------------------------------ #
# shown_cv
# ------------------------------------------------------------------ #

def test_shown_cv_default():
    cv = common.shown_cv(True)
    assert cv.get() is True


def test_shown_cv_set():
    cv = common.shown_cv(True)
    cv.set(False)
    assert cv.get() is False


def test_shown_cv_roundtrip():
    cv = common.shown_cv(False)
    assert cv.get() is False
    cv.set(True)
    assert cv.get() is True
    cv.set(True)
    assert cv.get() is True


# ------------------------------------------------------------------ #
# CheckAliveError (moved to bal.core.checkalive; kept tested via the
# common->core import chain)
# ------------------------------------------------------------------ #

def test_check_alive_error_default():
    from bal.core.checkalive import CheckAliveError

    err = CheckAliveError(1000000)
    assert err.timestamp_to_check == 1000000


def test_check_alive_error_str():
    from bal.core.checkalive import CheckAliveError

    err = CheckAliveError(1000000)
    s = str(err)
    assert "Check alive expired" in s
    assert "1970" in s


def test_check_alive_error_subclass():
    from bal.core.checkalive import CheckAliveError

    assert issubclass(CheckAliveError, Exception)


# ------------------------------------------------------------------ #
# add_widget
# ------------------------------------------------------------------ #

def test_add_widget():
    grid = QGridLayout()
    label = QLabel("test")
    common.add_widget(grid, "Label", label, 0, "Help text")
    assert grid.count() == 3  # label + widget + help button


def test_add_widget_multiple_rows():
    grid = QGridLayout()
    common.add_widget(grid, "A", QLabel("a"), 0, "help_a")
    common.add_widget(grid, "B", QLabel("b"), 1, "help_b")
    assert grid.count() == 6


# ------------------------------------------------------------------ #
# log_error
# ------------------------------------------------------------------ #

def test_log_error_no_window():
    common.log_error((Exception, Exception("test"), None))


# ------------------------------------------------------------------ #
# Main
# ------------------------------------------------------------------ #

if __name__ == "__main__":
    for name in sorted(dir()):
        if name.startswith("test_"):
            globals()[name]()
            print(f"  [OK] {name}")
    print("[OK] All common tests passed")