import { test } from 'node:test';
import assert from 'node:assert/strict';
import {
  DESIGN_WIDTH, DESIGN_HEIGHT,
  toCocosPosition, inferWidget, stretchWidget, isFullScreen, isOffscreen,
} from '../ui-migration/coords.mjs';

test('设计分辨率保持 1280x720', () => {
  assert.equal(DESIGN_WIDTH, 1280);
  assert.equal(DESIGN_HEIGHT, 720);
});

test('toCocosPosition 用 spec 的验算样例', () => {
  // spec §1.2: Left=320 Top=200 150x70 → x=-245 y=125
  assert.deepEqual(toCocosPosition(320, 200, 150, 70), { x: -245, y: 125 });
});

test('toCocosPosition 左上角对象落在画布左上', () => {
  // 0,0 的 100x50 → 中心在 (50,25) → x=50-640=-590, y=360-25=335
  assert.deepEqual(toCocosPosition(0, 0, 100, 50), { x: -590, y: 335 });
});

test('toCocosPosition 满屏对象落在原点', () => {
  assert.deepEqual(toCocosPosition(0, 0, 1280, 720), { x: 0, y: 0 });
});

test('inferWidget 中心点在左区 → 锚左', () => {
  // cx = 10+100/2 = 60 < 320
  assert.deepEqual(inferWidget(10, 100), { horizontal: 'left', left: 10 });
});

test('inferWidget 中心点在右区 → 锚右', () => {
  // cx = 1100+100/2 = 1150 > 960；right = 1280 - 1200 = 80
  assert.deepEqual(inferWidget(1100, 100), { horizontal: 'right', right: 80 });
});

test('inferWidget 中心点在中区 → 水平居中', () => {
  // cx = 320+150/2 = 395 ∈ [320,960]；horizontalCenter = 395-640 = -245
  assert.deepEqual(inferWidget(320, 150), { horizontal: 'center', horizontalCenter: -245 });
});

test('inferWidget 分界值 320 与 960 归入中区（非严格小于/大于才算边区）', () => {
  // cx 恰为 320：不满足 < 320 → 中区
  assert.equal(inferWidget(220, 200).horizontal, 'center');
  // cx 恰为 960：不满足 > 960 → 中区
  assert.equal(inferWidget(860, 200).horizontal, 'center');
});

test('inferWidget 屏外负坐标自然落入左区', () => {
  // cx = -286+100/2 = -236 < 320
  assert.equal(inferWidget(-286, 100).horizontal, 'left');
});

test('stretchWidget 四边全 0', () => {
  assert.deepEqual(stretchWidget(), {
    horizontal: 'stretch', vertical: 'stretch', left: 0, right: 0, top: 0, bottom: 0,
  });
});

test('isFullScreen 只认 >= 设计分辨率', () => {
  assert.equal(isFullScreen(1280, 720), true);
  assert.equal(isFullScreen(1300, 800), true);
  assert.equal(isFullScreen(1279, 720), false);
  assert.equal(isFullScreen(1280, 719), false);
});

test('isOffscreen 识别越界对象', () => {
  assert.equal(isOffscreen(0, 0, 1280, 720), false, '恰好满屏不算越界');
  assert.equal(isOffscreen(-286, 100, 50, 50), true, '左越界');
  assert.equal(isOffscreen(100, -318, 50, 50), true, '上越界');
  assert.equal(isOffscreen(1260, 100, 50, 50), true, '右越界');
  assert.equal(isOffscreen(100, 700, 50, 50), true, '下越界');
});