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

const staticDir = path.resolve(__dirname, "../app/static");

function domNode(id, extras = {}) {
  let value = "";
  return {
    id,
    textContent: "",
    innerHTML: "",
    hidden: false,
    disabled: false,
    dataset: {},
    classList: { toggle() {} },
    get value() {
      return value;
    },
    set value(nextValue) {
      value = String(nextValue ?? "");
    },
    setAttribute(name, nextValue) {
      this[name] = nextValue;
    },
    addEventListener() {},
    focus() {},
    ...extras,
  };
}

const elements = new Map();

function element(id) {
  if (!elements.has(id)) {
    elements.set(id, domNode(id));
  }
  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,
};
context.window = { location: { href: "" } };
context.confirm = () => true;
context.alert = () => {};

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(path.join(staticDir, "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");

vm.runInContext(
  `
const longSummaryBody = "完整课程小结内容".repeat(20);
currentRecords = [
  {
    date: "2026.06.14",
    weekday: "星期日",
    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: "summary-test",
    summary_count: 1,
    summaries: [{ title: "课程小结", body: longSummaryBody, teacher: "王老师", subject: "英语" }],
  },
];
expandedSummaryRecords = new Set(["summary-test"]);
collapsedTeacherGroups = new Set();
const summaryHtml = renderGroupedRecords(currentRecords);
if (!summaryHtml.includes(longSummaryBody)) {
  throw new Error("课程小结展开后应直接显示完整正文");
}
if (summaryHtml.includes("展开全文") || summaryHtml.includes("summary-toggle") || summaryHtml.includes("summary-preview")) {
  throw new Error("课程小结展开后不应再渲染展开全文按钮或预览裁切");
}
`,
  context,
);

const adminElements = new Map();
function adminElement(id) {
  if (!adminElements.has(id)) {
    adminElements.set(id, domNode(id, {
      scrollIntoView() {},
    }));
  }
  return adminElements.get(id);
}

const adminFetchUrls = [];
const adminContext = {
  console,
  navigator: {},
  Date,
  JSON,
  Map,
  Number,
  String,
  URLSearchParams,
  window: { location: { href: "" } },
  confirm: () => true,
  alert: () => {},
  document: {
    querySelector(selector) {
      return adminElement(selector.replace(/^#/, ""));
    },
    querySelectorAll() {
      return [];
    },
    addEventListener() {},
    createElement(tag) {
      return adminElement(`created-${tag}-${adminElements.size}`);
    },
    body: { appendChild() {} },
    execCommand() {
      return true;
    },
  },
  fetch: async (url) => {
    adminFetchUrls.push(String(url));
    if (String(url).startsWith("/api/students")) {
      return {
        ok: true,
        json: async () => ({
          summary: { total: 1, debt: 0, warning: 0, normal: 1 },
          count: 1,
          students: [
            {
              student_id: "XS001",
              student: "甲",
              primary_entry_year: 2020,
              account_status: "正常",
              remaining: 12,
              remaining_duration: "12小时",
              payments: [{ date: "2026-06-01", hours: 12, duration: "12小时" }],
              note: "备注",
            },
          ],
        }),
      };
    }
    return {
      ok: true,
      json: async () => ({
        ok: true,
        students_count: 1,
        active_teachers_count: 0,
        records_count: 0,
        course_summaries_count: 0,
        current_month_hours: 0,
        current_month_duration: "0小时",
        overview: {},
        students: { summary: {}, low_remaining: [] },
        teachers: {},
        course_summaries: {},
        tasks: {},
        teaching: {},
        period: {},
      }),
    };
  },
};

vm.createContext(adminContext);
vm.runInContext(fs.readFileSync(path.join(staticDir, "admin.js"), "utf8"), adminContext);
vm.runInContext("loadStudents()", adminContext);
setTimeout(() => {
  if (!adminFetchUrls.some((url) => url.startsWith("/api/students"))) {
    throw new Error(`学生档案列表未调用 /api/students：${adminFetchUrls.join(",")}`);
  }
  const rowsHtml = adminElements.get("studentRows").innerHTML;
  if (!rowsHtml.includes("XS001") || !rowsHtml.includes("2020")) {
    throw new Error("学生档案列表未渲染学生ID和入学年份");
  }
  vm.runInContext('openEditStudentEditor("XS001")', adminContext);
  const payload = vm.runInContext("buildStudentPayload()", adminContext);
  if (Object.prototype.hasOwnProperty.call(payload, "remaining")) {
    throw new Error("学生档案保存 payload 不应包含 remaining");
  }
  assertEqual("学生档案剩余课时只读展示", adminElements.get("editRemaining").value, "12小时");
  console.log("smoke test passed");
}, 0);