'use strict';

const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const vm = require('node:vm');

/**
 * @param {string} source - 页面源码
 * @param {string} name - 导出函数名
 * @returns {string} 可独立执行的函数源码
 */
function extractFunction(source, name) {
  const pattern = new RegExp('export function ' + name + '\\(');
  const match = pattern.exec(source);
  assert.ok(match, '缺少方法 ' + name);
  const nextExport = source.indexOf('\nexport function ', match.index + match[0].length);
  return source.slice(match.index, nextExport < 0 ? source.length : nextExport).replace(/^export /, '');
}

const sourcePath = process.argv[2]
  ? path.resolve(process.argv[2])
  : path.resolve(__dirname, '../src/timecard-change.oyd.jsx');
const source = fs.readFileSync(sourcePath, 'utf8');

assert.doesNotMatch(source, /window\._this/, '变更页渲染不得依赖跨页面共享的 window._this');
assert.match(source, /var _this = this;[\s\S]*if \(!_this \|\| !_this\.state/,
  'renderJsx 应使用当前页面实例');

let removedEvent = null;
let removedHandler = null;
const methods = vm.runInNewContext(
  ['refreshTimecardView', 'forceUpdate', 'didUnmount']
    .map((name) => extractFunction(source, name)).join('\n')
    + '\n({refreshTimecardView, forceUpdate, didUnmount})',
  {
    window: {
      removeEventListener(event, handler) {
        removedEvent = event;
        removedHandler = handler;
      },
    },
  },
);

const resizeHandler = () => {};
let setStateCount = 0;
let forceUpdateCount = 0;
const context = {
  _tcDisposed: false,
  _tcBeisenLeaveRequestKey: 'active-request',
  _tcResizeHandler: resizeHandler,
  setState() { setStateCount += 1; },
  forceUpdate() { forceUpdateCount += 1; },
};

methods.didUnmount.call(context);
assert.equal(context._tcDisposed, true);
assert.equal(context._tcBeisenLeaveRequestKey, '__TIMECARD_PAGE_DISPOSED__');
assert.equal(context._tcResizeHandler, null);
assert.equal(removedEvent, 'resize');
assert.equal(removedHandler, resizeHandler);

methods.refreshTimecardView.call(context);
methods.forceUpdate.call(context);
assert.equal(forceUpdateCount, 0, '卸载后不得继续 forceUpdate');
assert.equal(setStateCount, 0, '卸载后不得继续 setState');

console.log('PASS 变更页面切换时清理实例、监听和异步刷新');