const fs = require("fs");
const vm = require("vm");

const elements = new Map();

function element(id) {
  if (!elements.has(id)) {
    elements.set(id, {
      id,
      textContent: "",
      innerHTML: "",
      hidden: false,
      disabled: false,
      value: "",
      dataset: {},
      classList: { toggle() {} },
      setAttribute(name, value) {
        this[name] = value;
      },
      addEventListener() {},
      focus() {},
    });
  }
  return elements.get(id);
}

const documentStub = {
  querySelector(selector) {
    return element(selector.replace(/^#/, ""));
  },
  querySelectorAll() {
    return [];
  },
  addEventListener() {},
  createElement(tag) {
    return element(`created-${tag}-${elements.size}`);
  },
  body: { appendChild() {} },
  execCommand() {
    return true;
  },
};

const context = {
  console,
  document: documentStub,
  navigator: {},
  fetch: async () => ({ ok: true, json: async () => ({ classnotes: { mtime: 0 } }) }),
  Date,
  JSON,
  Map,
  Number,
  String,
};

function assertEqual(name, actual, expected) {
  if (actual !== expected) {
    throw new Error(`${name}: got ${actual}, expected ${expected}`);
  }
}

function value(expression) {
  return vm.runInContext(expression, context);
}

vm.createContext(context);
vm.runInContext(fs.readFileSync("app/static/app.js", "utf8"), context);

vm.runInContext(
  `
currentRecords = [
  { date: "2026.06.12", weekday: "星期五", time: "10:00-11:00", student: "甲", duration: "1小时0分", duration_hours: 1, teacher: "王老师", subject: "英语", _recordIndex: 0, _recordKey: "a" },
  { date: "2026.06.12", weekday: "星期五", time: "08:00-09:00", student: "乙", duration: "1小时0分", duration_hours: 1, teacher: "王老师", subject: "英语", _recordIndex: 1, _recordKey: "b" },
  { date: "2026.06.13", weekday: "星期六", time: "09:00-10:00", student: "丙", duration: "1小时0分", duration_hours: 1, teacher: "王老师", subject: "英语", _recordIndex: 2, _recordKey: "c" },
  { date: "2026.06.12", weekday: "星期五", time: "07:00-08:00", student: "丁", duration: "1小时0分", duration_hours: 1, teacher: "李老师", subject: "数学", _recordIndex: 3, _recordKey: "d" },
];
renderGroupedRecords(currentRecords);
`,
  context,
);

assertEqual("初始日期按钮文案", value("dateSortBtn.textContent"), "日期 升序排列");
assertEqual("初始时间按钮文案", value("timeSortBtn.textContent"), "时间 升序排列");
assertEqual("默认组内排序", value("currentRecordOrder.join('')"), "bacd");

vm.runInContext("toggleRecordSort('date')", context);
assertEqual("日期降序按钮文案", value("dateSortBtn.textContent"), "日期 降序排列");
assertEqual("日期降序组内排序", value("currentRecordOrder.join('')"), "cbad");

vm.runInContext("toggleRecordSort('date'); toggleRecordSort('time')", context);
assertEqual("时间降序按钮文案", value("timeSortBtn.textContent"), "时间 降序排列");
assertEqual("日期升序时间降序组内排序", value("currentRecordOrder.join('')"), "abcd");

vm.runInContext(
  `
correctedRecords.set("a", { ...currentRecords[0], date: "2026.06.11", weekday: "星期四", time: "07:00-08:00" });
renderGroupedRecords(currentRecords);
`,
  context,
);
assertEqual("纠错后排序仍使用显示记录", value("currentRecordOrder.join('')"), "abcd");
vm.runInContext("updateCorrectionToolbar('测试提交按钮')", context);
assertEqual("提交审核按钮文案", value("submitCorrectionsBtn.textContent"), "提交审核 1 条");

console.log("smoke test passed");