import assert from "node:assert/strict";
import test from "node:test";
import { readFileSync } from "node:fs";
import {
  createOnboardingFallbackGreeting,
  createStartGreeting,
  createStartGreetingParts,
} from "../src/lib/starter-greeting.ts";
import { homeSurface } from "./home-surface.ts";

// 2026-07-19 是周日，20 周一，22 周三（星期池为空），24 周五，25 周六。
const SUNDAY = (hour: number) => new Date(2026, 6, 19, hour);
const MONDAY = (hour: number) => new Date(2026, 6, 20, hour);
const WEDNESDAY = (hour: number) => new Date(2026, 6, 22, hour);
const FRIDAY = (hour: number) => new Date(2026, 6, 24, hour);

test("terminal and fallback greetings follow the current profile name", () => {
  // 原值: 同时锁 onboardingRequestIdentity / isCurrentOnboardingRequest，避免建议问题串号。
  // 新值: 只保留问候语随当前称呼变化。
  // 原因: 建议问题请求已删除，身份去重不再有消费点。
  //
  // 原值 `createStartGreeting("周宁", …, 0)` + `"周宁，从你此刻最关心的问题开始吧。"`
  // / 新值 `createStartGreeting("周宁", …, 0.25)` + `"欢迎，周宁"`
  // / 原因：时段池现在第一条是不带称呼的「早上好」，要取带称呼的条目得换下标；
  //   兜底问候按产品口径改成单行「欢迎，{名字}」，不再追问。断言强度没变：
  //   两条都仍然必须带当前称呼、不得带旧称呼。
  const terminalGreeting = createStartGreeting("周宁", SUNDAY(8), 0.25);
  const fallbackGreeting = createOnboardingFallbackGreeting("周宁");
  for (const greeting of [terminalGreeting, fallbackGreeting]) {
    assert.match(greeting, /周宁/);
    assert.doesNotMatch(greeting, /林遥/);
  }
  assert.equal(terminalGreeting, "早上好，周宁");
  assert.equal(fallbackGreeting, "欢迎，周宁");
});

test("the starter greeting is one line drawn from daypart, weekday and returning pools", () => {
  // 原值：`parts.salutation` = "中午好，周宁。"、`parts.question` = "现在最想理清哪件事？"，
  //   并断言两半拼起来等于整行、每个时段至少 12 条不同问句。
  // 新值：`parts.text` 就是整行问候；断言时段池按下标取到「中午好」/「中午好，周宁」。
  // 原因：产品把开场语改成 claude.ai 式的单行问候，追问句移到输入框占位符，
  //   「招呼语 + 问句」两半这个形状本身被取消，问句池不再存在。
  const noon = WEDNESDAY(12);
  assert.equal(createStartGreetingParts("周宁", noon, 0).text, "中午好");
  assert.equal(createStartGreetingParts("周宁", noon, 0.5).text, "中午好，周宁");
  assert.equal(createStartGreeting("周宁", noon, 0.5), createStartGreetingParts("周宁", noon, 0.5).text);

  // 边界不越界：1 与 0.999999 都落在池内最后一条。
  assert.equal(createStartGreetingParts("周宁", noon, 1).text, "中午好，周宁");
  assert.equal(createStartGreetingParts("周宁", noon, 0.999999).text, "中午好，周宁");
});

test("late night has its own three lines and none of them asks a follow-up", () => {
  const lateNight = WEDNESDAY(2);
  assert.equal(createStartGreetingParts("周宁", lateNight, 0).text, "夜猫子，晚上好");
  assert.equal(createStartGreetingParts("周宁", lateNight, 1 / 3).text, "还没睡呀，周宁");
  assert.equal(createStartGreetingParts("周宁", lateNight, 0.7).text, "晚安前再聊一会");
  // 23 点与 4 点同属深夜。
  assert.equal(createStartGreetingParts("周宁", WEDNESDAY(23), 1 / 3).text, "还没睡呀，周宁");
  assert.equal(createStartGreetingParts("周宁", WEDNESDAY(4), 1 / 3).text, "还没睡呀，周宁");
});

test("a blank name leaves only the lines that carry no name", () => {
  const lateNight = WEDNESDAY(2);
  assert.equal(createStartGreetingParts("", lateNight, 0).text, "夜猫子，晚上好");
  assert.equal(createStartGreetingParts("   ", lateNight, 0.9).text, "晚安前再聊一会");

  // 周一的星期条目带称呼，名字为空时整条不可达；回访池同理。
  for (let step = 0; step < 100; step += 1) {
    for (const hasSessions of [false, true]) {
      const text = createStartGreetingParts("", MONDAY(9), step / 100, hasSessions).text;
      assert.doesNotMatch(text, /周一了/);
      assert.doesNotMatch(text, /又见面了|嗨，|最近还好吗/);
      assert.ok(text.length > 0);
      assert.doesNotMatch(text, /\{名字\}/);
      assert.doesNotMatch(text, /，$|^，/);
    }
  }
});

test("the weekday pool only opens on its own day", () => {
  const friday = FRIDAY(9);
  const fridayLines = new Set(Array.from({ length: 100 }, (_, step) =>
    createStartGreetingParts("周宁", friday, step / 100).text));
  assert.ok(fridayLines.has("周五快乐"));

  const wednesdayLines = new Set(Array.from({ length: 100 }, (_, step) =>
    createStartGreetingParts("周宁", WEDNESDAY(9), step / 100).text));
  assert.ok(!wednesdayLines.has("周五快乐"));
  assert.equal(wednesdayLines.size, 3);

  assert.ok(new Set(Array.from({ length: 100 }, (_, step) =>
    createStartGreetingParts("周宁", MONDAY(9), step / 100).text)).has("周一了，周宁"));
  assert.ok(new Set(Array.from({ length: 100 }, (_, step) =>
    createStartGreetingParts("周宁", SUNDAY(9), step / 100).text)).has("周日，慢一点"));
});

test("the returning pool needs at least one session behind the account", () => {
  const evening = WEDNESDAY(20);
  const returning = ["又见面了，周宁", "欢迎回来", "嗨，周宁", "最近还好吗，周宁？"];

  const firstVisit = new Set(Array.from({ length: 100 }, (_, step) =>
    createStartGreetingParts("周宁", evening, step / 100, false).text));
  for (const line of returning) assert.ok(!firstVisit.has(line), `first visit must not reach ${line}`);
  assert.equal(firstVisit.size, 3);

  const returnVisit = new Set(Array.from({ length: 100 }, (_, step) =>
    createStartGreetingParts("周宁", evening, step / 100, true).text));
  for (const line of returning) assert.ok(returnVisit.has(line), `return visit must reach ${line}`);
  assert.equal(returnVisit.size, 7);
});

test("the same inputs always produce the same line", () => {
  for (const hour of [2, 8, 12, 16, 20]) {
    for (const hasSessions of [false, true]) {
      for (const step of [0, 17, 42, 99]) {
        const args = [hour, step / 100, hasSessions] as const;
        const first = createStartGreeting("周宁", WEDNESDAY(args[0]), args[1], args[2]);
        const second = createStartGreeting("周宁", WEDNESDAY(args[0]), args[1], args[2]);
        assert.equal(first, second);
      }
    }
  }
});

test("no greeting line uses a metaphor or trails off into a sentence", () => {
  for (let day = 19; day <= 25; day += 1) {
    for (let hour = 0; hour < 24; hour += 1) {
      for (const name of ["周宁", ""]) {
        for (const hasSessions of [false, true]) {
          for (let step = 0; step < 100; step += 1) {
            const text = createStartGreetingParts(
              name,
              new Date(2026, 6, day, hour),
              step / 100,
              hasSessions,
            ).text;
            assert.doesNotMatch(text, /[星月陪]/, `metaphor in ${text}`);
            assert.doesNotMatch(text, /。$/, `sentence period in ${text}`);
            assert.ok(text.length > 0);
            assert.ok(text.length <= 12, `${text} is longer than one short line`);
          }
        }
      }
    }
  }
});

test("the starter hero is one heading and nothing else", () => {
  const source = homeSurface;

  // 原值 `className="starter-greeting"` / 新值 `className="starter-salutation"`
  // / 原因：`.starter-greeting` 这个类名此前既指招呼语那一行、又被读成整块问候区，
  // 拆成 `.starter-greeting-block`（容器）与 `.starter-salutation`（招呼语）后不再歧义。
  //
  // 原值：断言 `<p className="starter-salutation">` 与 `<h1>{starterGreeting.question}</h1>` 同时存在
  // / 新值：断言只剩 `<h1 id="starter-heading">{starterGreeting.text}</h1>`，且 `starter-salutation` 在源码与样式里都消失
  // / 原因：开场语改成单行问候，副标题那一行连同它的样式一起下线；断言从「两行」改成「一行且不得有第二行」，强度不降反升。
  assert.match(source, /<h1 id="starter-heading">\{starterGreeting\.text\}<\/h1>/);
  assert.doesNotMatch(source, /starter-salutation/);
  assert.doesNotMatch(source, /starterGreeting\.(salutation|question)/);

  // Then: no third line repeats the welcome the heading already carries.
  assert.doesNotMatch(source, /starter-hero-note/);
  const styles = readFileSync(new URL("../src/app/globals.css", import.meta.url), "utf8");
  assert.doesNotMatch(styles, /starter-hero-note/);
  assert.doesNotMatch(styles, /starter-salutation/);

  // And: the separate static heading pool is gone for good.
  assert.doesNotMatch(source, /starterPrompt|createStarterPrompt|greetingForHour/);
  assert.doesNotMatch(source, /greeting: createStartGreeting\(/);
});

test("the greeting knows whether the account already has sessions", () => {
  // hasSessions 必须来自已有的会话列表变量，不得新开一份状态。
  assert.match(homeSurface, /const starterHasPriorSessions = sessions\.some\(/);
  assert.match(homeSurface, /createStartGreetingParts\(profile\.name, new Date\(\), starterGreetingSelection, starterHasPriorSessions\)/);
});