import assert from "node:assert/strict";
import test from "node:test";
import { readFileSync } from "node:fs";
import {
  createOnboardingFallbackGreeting,
  createStartGreeting,
  createStartGreetingParts,
  isCurrentOnboardingRequest,
  onboardingProfileFingerprint,
  onboardingRequestIdentity,
} from "../src/lib/onboarding-client.ts";

const completeProfile = {
  name: "林遥", date: "1990-06-15", time: "12:30", reportedTime: "12:30",
  birthTimeSource: "hospital_record", birthTimePeriod: "", birthTimeClue: "出生证明", birthTimeStatus: "confirmed",
  uncertaintyBeforeMinutes: 0, uncertaintyAfterMinutes: 0, rectificationCaseId: "", countryCode: "CN", provinceCode: "110000", cityCode: "110000-city", districtCode: "110101",
} as const;

test("rejects stale A presentation and derives terminal and fallback greetings from profile B", () => {
  // Given: one account starts onboarding for a complete persisted profile A.
  const firstIdentity = onboardingRequestIdentity("account-1", onboardingProfileFingerprint(completeProfile));

  // When: the name changes before that request completes and profile B is presented.
  const changedProfile = { ...completeProfile, name: "周宁" };
  const currentIdentity = onboardingRequestIdentity("account-1", onboardingProfileFingerprint(changedProfile));
  const terminalGreeting = createStartGreeting(changedProfile.name, new Date("2026-07-19T08:00:00+08:00"), 0);
  const fallbackGreeting = createOnboardingFallbackGreeting(changedProfile.name);

  // Then: stale work is rejected and neither presentation path can retain A's name.
  assert.notEqual(currentIdentity, firstIdentity);
  assert.equal(isCurrentOnboardingRequest(currentIdentity, firstIdentity), false);
  for (const greeting of [terminalGreeting, fallbackGreeting]) {
    assert.match(greeting, /周宁/);
    assert.doesNotMatch(greeting, /林遥/);
  }
  assert.equal(fallbackGreeting, "周宁，从你此刻最关心的问题开始吧。");
});

test("the starter hero splits one time-aware greeting instead of drawing from a separate pool", () => {
  // Given: the same daypart variant, asked for as parts and as one line.
  const noon = new Date("2026-07-19T12:00:00+08:00");
  const parts = createStartGreetingParts("周宁", noon, 0);
  const whole = createStartGreeting("周宁", noon, 0);

  // Then: the salutation carries the name and the question carries no name, and they recompose exactly.
  assert.equal(parts.salutation, "中午好，周宁。");
  assert.equal(parts.question, "现在最想理清哪件事？");
  assert.equal(`${parts.salutation}${parts.question}`, whole);
  assert.doesNotMatch(parts.question, /周宁/);

  // And: the extremes stay inside the variant list rather than falling off the end.
  assert.equal(createStartGreetingParts("周宁", noon, 1).question, "事业、关系或选择，想先聊哪个？");
  assert.equal(createStartGreetingParts("周宁", noon, 0.999999).question, "事业、关系或选择，想先聊哪个？");

  // And: every daypart is reachable, so the heading is not one fixed line in disguise.
  const questions = new Set([0, 8, 12, 16, 20, 23].flatMap((hour) =>
    [0, 1 / 3, 2 / 3].map((selection) =>
      createStartGreetingParts("周宁", new Date(2026, 6, 19, hour), selection).question)));
  assert.ok(questions.size >= 12);
});

test("the starter hero stays at a salutation and a question", () => {
  const source = readFileSync(new URL("../src/app/page.tsx", import.meta.url), "utf8");

  // Given: the hero heading is the question half of the time-aware greeting.
  assert.match(source, /<p className="starter-greeting">\{starterGreeting\.salutation\}<\/p>/);
  assert.match(source, /<h1 id="starter-heading">\{starterGreeting\.question\}<\/h1>/);

  // Then: no third line repeats the welcome the two lines above already carry.
  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/);

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