"""자막 배경 상자(padding)와 위치 조정 모드."""

from __future__ import annotations

import os

import pytest

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

from PySide6.QtCore import QPoint, QRect  # noqa: E402
from PySide6.QtWidgets import QApplication  # noqa: E402

from livesub.config import OverlayConfig, SubtitleStyle  # noqa: E402
from livesub.ui.overlay import SubtitleOverlay, _content_box  # noqa: E402

WINDOW = QRect(0, 0, 1000, 400)


@pytest.fixture(scope="session")
def qapp():
    app = QApplication.instance() or QApplication([])
    yield app


# --- 배경 상자 -------------------------------------------------------------


def test_배경은_글자를_감싼다():
    """창 전체가 아니라 글자 크기에 맞춰야 여백이 곧 배경 크기가 된다."""
    box = _content_box(WINDOW, text_w=300, text_h=60, pad=18, align="center")
    assert box.width() == 300 + 18 * 2
    assert box.height() == 60 + 18 * 2
    assert box.width() < WINDOW.width()


def test_여백을_키우면_배경이_커진다():
    small = _content_box(WINDOW, 300, 60, pad=8, align="center")
    large = _content_box(WINDOW, 300, 60, pad=40, align="center")
    assert large.width() - small.width() == (40 - 8) * 2
    assert large.height() - small.height() == (40 - 8) * 2


def test_배경은_창_밖으로_넘지_않는다():
    box = _content_box(WINDOW, text_w=5000, text_h=5000, pad=40, align="center")
    assert box.width() == WINDOW.width()
    assert box.height() == WINDOW.height()


@pytest.mark.parametrize(
    ("align", "expected_left"),
    [("left", 0), ("center", (1000 - 336) // 2), ("right", 1000 - 336)],
)
def test_정렬에_따라_상자가_붙는_쪽이_달라진다(align, expected_left):
    box = _content_box(WINDOW, text_w=300, text_h=60, pad=18, align=align)
    assert box.width() == 336
    assert abs(box.x() - expected_left) <= 1


def test_기본_여백이_설정에_있다():
    assert SubtitleStyle().padding > 0


# --- 위치 조정 모드 --------------------------------------------------------


@pytest.fixture
def overlay(qapp):
    cfg = OverlayConfig()
    cfg.visible = False
    widget = SubtitleOverlay(SubtitleStyle(), cfg)
    yield widget
    widget.close()


def test_기본은_잠겨_있어_움직이지_않는다(overlay):
    """게임 중에 자막을 실수로 끌고 다니는 사고를 막는 기본값이다."""
    assert OverlayConfig().locked is True
    assert overlay.edit_mode is False
    assert overlay._interactive is False


def test_위치_조정을_켜면_잡을_수_있다(overlay):
    overlay.set_edit_mode(True)
    assert overlay.edit_mode is True
    assert overlay._interactive is True
    # 클릭 통과가 켜져 있으면 마우스가 창을 그냥 지나가 잡을 수가 없다.
    from PySide6.QtCore import Qt

    assert not overlay.testAttribute(Qt.WidgetAttribute.WA_TransparentForMouseEvents)

    overlay.set_edit_mode(False)
    assert overlay._interactive is False


def test_모서리를_집었는지_알아본다(overlay):
    overlay.setGeometry(0, 0, 600, 200)
    assert overlay._corner_at(QPoint(2, 2)) == "topleft"
    assert overlay._corner_at(QPoint(598, 2)) == "topright"
    assert overlay._corner_at(QPoint(2, 198)) == "bottomleft"
    assert overlay._corner_at(QPoint(598, 198)) == "bottomright"
    # 가운데는 이동용이지 크기 조절이 아니다
    assert overlay._corner_at(QPoint(300, 100)) == ""


def test_크기를_키우면_글자도_같이_커진다(overlay):
    overlay.set_edit_mode(True)
    overlay.setGeometry(100, 100, 600, 200)
    overlay.style_cfg.font_size = 40

    overlay._resize_corner = "bottomright"
    overlay._resize_geo = QRect(overlay.geometry())
    overlay._resize_mouse = QPoint(700, 300)
    overlay._resize_font = 40
    overlay._resize_to(QPoint(700, 500))  # 높이 200 -> 400

    assert overlay.height() == 400
    assert overlay.style_cfg.font_size == 80


def test_반대쪽_모서리는_제자리에_있는다(overlay):
    """왼쪽 위를 끌면 오른쪽 아래는 움직이지 않아야 한다."""
    overlay.set_edit_mode(True)
    overlay.setGeometry(200, 200, 600, 200)
    start = QRect(overlay.geometry())

    overlay._resize_corner = "topleft"
    overlay._resize_geo = start
    overlay._resize_mouse = QPoint(200, 200)
    overlay._resize_font = overlay.style_cfg.font_size
    overlay._resize_to(QPoint(300, 250))

    assert overlay.geometry().right() == start.right()
    assert overlay.geometry().bottom() == start.bottom()
    assert overlay.geometry().x() == 300


def test_최소_크기_아래로는_줄지_않는다(overlay):
    overlay.set_edit_mode(True)
    overlay.setGeometry(0, 0, 600, 200)
    overlay._resize_corner = "bottomright"
    overlay._resize_geo = QRect(overlay.geometry())
    overlay._resize_mouse = QPoint(600, 200)
    overlay._resize_font = overlay.style_cfg.font_size
    overlay._resize_to(QPoint(-5000, -5000))

    assert overlay.width() >= overlay.minimumWidth()
    assert overlay.height() >= overlay.minimumHeight()