"""The mini timer's corner geometry.

A pure function, so it is worth pinning down: this is the sort of arithmetic
that silently puts a window half off the screen on somebody else's monitor.
"""

from __future__ import annotations

import pytest
from kadence_desktop.integrations.placement import CORNER_LABELS, CORNERS, Rect, point_for

SCREEN = Rect(0, 0, 1536, 960)
SIZE = (252, 152)


def test_each_corner_lands_where_its_name_says():
    assert point_for("top-left", SCREEN, SIZE, 24) == (24, 24)
    assert point_for("top-right", SCREEN, SIZE, 24) == (1260, 24)
    assert point_for("bottom-left", SCREEN, SIZE, 24) == (24, 784)
    assert point_for("bottom-right", SCREEN, SIZE, 24) == (1260, 784)


def test_edge_centres_and_centre_are_centred():
    centre_x = (1536 - 252) // 2
    assert point_for("top-centre", SCREEN, SIZE, 24) == (centre_x, 24)
    assert point_for("bottom-centre", SCREEN, SIZE, 24) == (centre_x, 784)
    assert point_for("centre", SCREEN, SIZE, 24) == (centre_x, (960 - 152) // 2)


def test_a_margin_of_zero_hugs_the_edge():
    assert point_for("bottom-right", SCREEN, SIZE, 0) == (1536 - 252, 960 - 152)


def test_the_screen_offset_is_respected_on_a_second_monitor():
    """A monitor to the right of the primary one starts at a non-zero x."""
    second = Rect(1536, 0, 1920, 1080)
    assert point_for("top-right", second, SIZE, 24) == (1536 + 1920 - 252 - 24, 24)
    assert point_for("bottom-left", second, SIZE, 24) == (1536 + 24, 1080 - 152 - 24)


@pytest.mark.parametrize("corner", [c for c in CORNERS if c != "remember"])
def test_the_window_never_leaves_the_screen(corner):
    """Even on a screen smaller than the window, or with a silly margin."""
    tiny = Rect(0, 0, 200, 120)
    x, y = point_for(corner, tiny, SIZE, 400)
    assert x >= tiny.x and y >= tiny.y
    assert x <= tiny.x + max(tiny.width - SIZE[0], 0)
    assert y <= tiny.y + max(tiny.height - SIZE[1], 0)


def test_every_corner_has_a_label_for_the_settings_page():
    assert set(CORNER_LABELS) == set(CORNERS)