/* 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");

/* ganttBars：甘特图横条位置（左偏移/宽度百分比） */
const ganttBars = loadFn("ganttBars");
const gb = ganttBars([2, 2, 4]);
eq(gb.length, 3, "甘特条数");
eq(gb[0].left + "," + gb[0].width, "0,25", "甘特首条位置");
eq(gb[2].left + "," + gb[2].width, "50,50", "甘特末条位置");
eq(ganttBars([4, 4])[1].left, 50, "等长两阶段第二条起点");

/* diffSkillRows：时点画像 Git 风格差集 */
const diffSkillRows = loadFn("diffSkillRows");
const d = diffSkillRows(
  [{ skill: "Java", importance: "required" }, { skill: "JSP", importance: "preferred" }],
  [{ skill: "Java", importance: "preferred" }, { skill: "Kubernetes", importance: "required" }]);
eq(d.add.map((r) => r.skill).join(","), "Kubernetes", "diff 新增");
eq(d.del.map((r) => r.skill).join(","), "JSP", "diff 退出");
eq(d.keep.length, 1, "diff 保留数");
eq(d.keep[0].up, true, "加分升级必备标记");

/* easeOutCubic：count-up 缓动曲线（0→1，中点已过 87.5%） */
const easeOutCubic = loadFn("easeOutCubic");
eq(easeOutCubic(0), 0, "缓动起点为 0");
eq(easeOutCubic(1), 1, "缓动终点为 1");
eq(easeOutCubic(0.5), 0.875, "缓动中点 easeOut 特征");
eq(easeOutCubic(0.25) < easeOutCubic(0.5), true, "缓动单调递增");

/* trendSeries：近 n 季度事件序列（总量 + 四类计数） */
const trendSeries = new Function(
  `const CHANGE_META = { "新增": {}, "增强": {}, "减弱": {}, "退出": {} };\n${extractFn("trendSeries")}; return trendSeries;`)();
const tsEvts = [
  ...Array.from({ length: 9 }, (_, i) => ({ window: `20${10 + i}Q1`, change_type: "新增" })),
  { window: "2018Q1", change_type: "增强" },
  { window: "2018Q1", change_type: "退出" },
  { window: "2018Q1", change_type: "其他" },
];
const ts = trendSeries(tsEvts, 8);
eq(ts.length, 8, "趋势序列只取近 8 季");
eq(ts[7].window, "2018Q1", "最近窗口在序列末尾");
eq(ts[7].total, 4, "末季总量含未分类事件");
eq(ts[7].byType["新增"], 1, "末季新增计数");
eq(ts[7].byType["增强"], 1, "末季增强计数");
eq(ts[7].byType["退出"], 1, "末季退出计数");
eq(trendSeries([], 8).length, 0, "空事件空序列");

/* computeReplaceBuckets：能力更替三桶（旧核心 / 持续 / 新核心，近 4 季度口径） */
const computeReplaceBuckets = loadFn("computeReplaceBuckets");
const rpWins = ["2025Q2", "2025Q3", "2025Q4", "2026Q1", "2026Q2", "2026Q3"];
const rpEdges = [
  { target: "JSP", intervals: [["2020Q1", "2025Q4"]] },          // 已退出 → 旧核心
  { target: "Java", intervals: [["2020Q1", null]] },             // 持续
  { target: "Kubernetes", intervals: [["2026Q1", null]] },       // 近 4 季进入 → 新核心
  { target: "Docker", intervals: [["2025Q2", null]] },           // 起点不在近 4 季 → 持续
];
const rp = computeReplaceBuckets(rpEdges, rpWins);
eq(rp.oldCore.map((e) => e.target).join(","), "JSP", "旧核心=已退出");
eq(rp.cont.map((e) => e.target).join(","), "Java,Docker", "持续=生效且非近期进入");
eq(rp.newCore.map((e) => e.target).join(","), "Kubernetes", "新核心=近 4 季进入");
eq(computeReplaceBuckets(rpEdges, []).newCore.length, 0, "无窗口时无新核心");

/* radarValues：双雷达候选人四维归一化（缺失 0 / 超界截断） */
const radarValues = new Function(
  `const RADAR_KEYS = ["required", "preferred", "experience", "scenario"];\n${extractFn("radarValues")}; return radarValues;`)();
eq(radarValues({ required: 80, preferred: 50, experience: 100, scenario: 0 }).join(","), "0.8,0.5,1,0", "雷达四维映射");
eq(radarValues({ required: 120 }).join(","), "1,0,0,0", "雷达超界截断");
eq(radarValues(null).join(","), "0,0,0,0", "雷达空对象兜底");

/* graph.js 纯逻辑：时序边生效判定 / 职级带归属（函数在 IIFE 内，按两空格缩进闭合提取） */
const gsrc = fs.readFileSync(path.join(__dirname, "..", "webui", "graph.js"), "utf-8");
function loadGraphFns(names) {
  const code = names.map((n) => {
    const m = gsrc.match(new RegExp(`function ${n}\\([\\s\\S]*?\\n  \\}`));
    if (!m) throw new Error(`graph.js 未找到函数 ${n}`);
    return m[0];
  }).join("\n");
  return new Function(`${code}; return { ${names.join(", ")} };`)();
}
const gf = loadGraphFns(["jobLevel", "levelBandOf", "edgeActiveAt"]);
eq(gf.edgeActiveAt({ intervals: [] }, "2026Q1"), true, "无区间边始终生效");
eq(gf.edgeActiveAt({ intervals: [["2025Q1", "2025Q3"]] }, "2025Q2"), true, "区间内生效");
eq(gf.edgeActiveAt({ intervals: [["2025Q1", "2025Q3"]] }, "2025Q3"), false, "结束边界半开不生效");
eq(gf.edgeActiveAt({ intervals: [["2025Q1", "2025Q3"]] }, "2024Q4"), false, "起点前不生效");
eq(gf.edgeActiveAt({ intervals: [["2025Q1", null]] }, "2026Q4"), true, "开放区间持续生效");
eq(gf.jobLevel({ expected_years: 1 }), "初级", "≤2年初级");
eq(gf.jobLevel({ expected_years: 4 }), "中级", "3-5年中级");
eq(gf.jobLevel({ expected_years: 8 }), "高级", ">5年高级");
eq(gf.levelBandOf({ type: "Job", expected_years: 1 }), 0, "初级岗位入带0");
eq(gf.levelBandOf({ type: "Job", expected_years: 8 }), 2, "高级岗位入带2");
eq(gf.levelBandOf({ type: "Skill", level: "L1" }), 0, "L1技能入带0");
eq(gf.levelBandOf({ type: "Skill", level: "L3" }), 2, "L3技能入带2");
eq(gf.levelBandOf({ type: "Skill" }), 1, "无级别技能默认中级带");

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