/* 关键前端逻辑单测（node 直跑）：错误翻译 / 结论分档 / 阶段命名 / 本期结论分组 */
"use strict";
const fs = require("fs");
const path = require("path");
const src = fs.readFileSync(path.join(__dirname, "..", "webui", "app.js"), "utf-8");

function extractFn(name) {
  const m = src.match(new RegExp(`function ${name}\\([\\s\\S]*?\\n}`));
  if (!m) throw new Error(`未找到函数 ${name}`);
  return m[0];
}

function loadFn(name) {
  // 在独立函数作用域内定义并返回目标函数（规避 eval 严格模式作用域问题）
  return new Function(`${extractFn(name)}; return ${name};`)();
}
const friendlyErr = loadFn("friendlyErr");
const matchAdvice = loadFn("matchAdvice");

let pass = 0, fail = 0;
function eq(actual, expected, label) {
  const ok = actual === expected;
  if (ok) pass++; else { fail++; console.error(`FAIL ${label}: 期望 ${JSON.stringify(expected)} 实际 ${JSON.stringify(actual)}`); }
}
function includes(hay, needle, label) {
  const ok = String(hay).includes(needle);
  if (ok) pass++; else { fail++; console.error(`FAIL ${label}: ${JSON.stringify(hay)} 不含 ${needle}`); }
}

/* friendlyErr：禁止出现 Failed to fetch / 内部文件名 / 接口路径 */
eq(friendlyErr(new TypeError("Failed to fetch")), "暂时无法连接服务，请检查后端是否已启动", "fetch 失败翻译");
eq(friendlyErr(new Error("NetworkError when attempting to fetch resource.")), "暂时无法连接服务，请检查后端是否已启动", "NetworkError 翻译");
eq(friendlyErr(new Error("记录不存在")), "记录不存在", "服务端中文 detail 原样保留");
eq(friendlyErr(new Error("HTTP 500")), "服务响应异常（500）", "HTTP 状态码中文化");
eq(friendlyErr(new Error("batch_2019.jsonl#92 读取失败")), "操作失败，请稍后重试", "内部文件名不外显");
eq(friendlyErr(new Error("")), "操作失败，请稍后重试", "空消息兜底");

/* matchAdvice：三档结论 */
includes(matchAdvice(85), "强烈推荐", ">=80 档");
includes(matchAdvice(72), "补齐核心缺口", "60-80 档");
includes(matchAdvice(40), "先系统学习", "<60 档");
includes(matchAdvice(80), "强烈推荐", "边界 80");
includes(matchAdvice(60), "补齐核心缺口", "边界 60");
includes(matchAdvice(59.9), "先系统学习", "边界 59.9");

/* 阶段语义化命名（与 renderPath 内逻辑一致） */
const STAGE_NAMES = ["基础补齐", "岗位核心", "项目验证"];
const stageName = (i) => STAGE_NAMES[i] || "综合提升";
eq(stageName(0), "基础补齐", "阶段1命名");
eq(stageName(1), "岗位核心", "阶段2命名");
eq(stageName(2), "项目验证", "阶段3命名");
eq(stageName(3), "综合提升", "阶段4顺延");

/* 本期结论分组逻辑（与 renderEvoSummary 一致） */
const evoEvents = [
  { window: "2026Q2", change_type: "新增", skill: "Kubernetes", prev_weight: 0, curr_weight: 2.52 },
  { window: "2026Q2", change_type: "增强", skill: "微服务", prev_weight: 1.3, curr_weight: 2.1 },
  { window: "2026Q3", change_type: "减弱", skill: "JSP", prev_weight: 0.8, curr_weight: 0.2 },
  { window: "2026Q3", change_type: "退出", skill: "Struts", prev_weight: 0.1, curr_weight: 0 },
];
const wins = [...new Set(evoEvents.map((e) => e.window))].sort().slice(-2);
eq(wins.join(","), "2026Q2,2026Q3", "最近两个季度窗口");
const verb = { "新增": "成为新要求", "增强": "需求显著增强", "减弱": "需求明显减弱", "退出": "退出能力画像" };
eq(verb[evoEvents[1].change_type], "需求显著增强", "增强动词");
const line = `${evoEvents[1].skill}（需求指数 ${evoEvents[1].prev_weight.toFixed(2)}→${evoEvents[1].curr_weight.toFixed(2)}）`;
eq(line, "微服务（需求指数 1.30→2.10）", "需求指数文案");

/* 热度走势默认近 8 季切片 */
const heat = Array.from({ length: 30 }, (_, i) => [`20${10 + i}Q1`, i]);
eq(heat.slice(-8).length, 8, "近8季切片");
eq(heat.slice(-Infinity).length, 30, "全部范围");

/* candidateTrust：候选可信等级四指标（JD≥15 / 企业≥5 / 增长趋势 / 差异度≥0.40） */
const candidateTrust = loadFn("candidateTrust");
const stageEffortText = loadFn("stageEffortText");
const existJobs = [{ title: "Java开发工程师", required_skills: ["Java", "MySQL"], preferred_skills: ["Redis"] }];
const strong = candidateTrust({
  source_count: 31, company_count: 12,
  support_windows: ["2025Q1", "2025Q2", "2025Q3", "2025Q4", "2026Q1", "2026Q2"],
  required_skills: ["RAG", "向量检索"], preferred_skills: [],
}, existJobs);
eq(strong.dots.length, 4, "四指标点");
eq(strong.level, "高", "四指标全达标为高");
const weak = candidateTrust({
  source_count: 3, company_count: 1, support_windows: ["2026Q2"],
  required_skills: ["Java", "MySQL"], preferred_skills: ["Redis"],
}, existJobs);
eq(weak.level, "低", "弱证据且与既有岗位重合为低");
eq(weak.nearest.title, "Java开发工程师", "识别出最相近既有岗位");
eq(weak.distinctness, 0, "技能完全重合时差异度为 0");

/* stageEffortText：阶段预计投入（每周约 8 小时） */
eq(stageEffortText(2), "2 周 / 约 16 小时", "阶段投入文案");
eq(stageEffortText(1), "1 周 / 约 8 小时", "单周投入文案");

console.log(`\n${pass} passed, ${fail} failed`);
process.exit(fail ? 1 : 0);