"""Unit tests for platform_metrics: dimensions, keyboard, subscribers."""

from __future__ import annotations

from typing import Generator

import pytest

from pythonnative import platform_metrics as pm

@pytest.fixture(autouse=True)

def _reset() -> Generator[None, None, None]:

pm.reset_safe_area_insets()

pm.reset_window_dimensions()

pm.reset_keyboard_height()

yield

pm.reset_safe_area_insets()

pm.reset_window_dimensions()

pm.reset_keyboard_height()

# ======================================================================

# Window dimensions

# ======================================================================

def test_window_dimensions_default_zero() -> None:

dims = pm.get_window_dimensions()

assert dims.width == 0.0

assert dims.height == 0.0

def test_set_window_dimensions_clamps_negative() -> None:

pm.set_window_dimensions(-1.0, -2.0)

dims = pm.get_window_dimensions()

assert dims.width == 0.0

assert dims.height == 0.0

def test_set_window_dimensions_updates() -> None:

pm.set_window_dimensions(390.0, 844.0)

dims = pm.get_window_dimensions()

assert dims.width == 390.0

assert dims.height == 844.0

# ======================================================================

# Keyboard height

# ======================================================================

def test_keyboard_height_default_zero() -> None:

assert pm.get_keyboard_height() == 0.0

def test_keyboard_height_clamps_negative() -> None:

pm.set_keyboard_height(-50.0)

assert pm.get_keyboard_height() == 0.0

def test_keyboard_height_updates() -> None:

pm.set_keyboard_height(280.0)

assert pm.get_keyboard_height() == 280.0

# ======================================================================

# Subscribers

# ======================================================================

def test_subscribe_fires_on_window_change() -> None:

received: list = []

pm.subscribe(lambda: received.append("tick"))

pm.set_window_dimensions(100, 200)

assert received == ["tick"]

def test_subscribe_fires_on_keyboard_change() -> None:

received: list = []

pm.subscribe(lambda: received.append("tick"))

pm.set_keyboard_height(100)

assert received == ["tick"]

def test_subscribe_fires_on_safe_area_change() -> None:

received: list = []

pm.subscribe(lambda: received.append("tick"))

pm.set_safe_area_insets(top=44.0, left=0.0, bottom=34.0, right=0.0)

assert received == ["tick"]

def test_subscribe_skips_no_op_updates() -> None:

received: list = []

pm.subscribe(lambda: received.append("tick"))

pm.set_window_dimensions(100, 200)

pm.set_window_dimensions(100, 200) # same value

assert received == ["tick"]

def test_unsubscribe_stops_notifications() -> None:

received: list = []

unsub = pm.subscribe(lambda: received.append("tick"))

pm.set_keyboard_height(100)

unsub()

pm.set_keyboard_height(200)

assert received == ["tick"]

def test_subscriber_exception_isolated() -> None:

received: list = []

def boom() -> None:

raise RuntimeError("boom")

pm.subscribe(boom)

pm.subscribe(lambda: received.append("ok"))

pm.set_window_dimensions(50, 60)

assert received == ["ok"]