import assert from "node:assert/strict";
import { readFileSync } from "node:fs";
import test from "node:test";

const readProjectFile = (path: string) => readFileSync(new URL(`../${path}`, import.meta.url), "utf8");
const globalStyles = readProjectFile("src/app/globals.css");
const messageRowSource = readProjectFile("src/components/chat-message-row.tsx");

test("aligns the session transcript and composer to one readable column", () => {
  assert.match(globalStyles, /--session-column-width:\s*760px/);
  assert.match(globalStyles, /\.conversation:not\(\.is-empty\):not\(\.is-rectification\) \.message-list\s*\{[^}]*width:\s*min\(calc\(var\(--session-column-width\)/);
  assert.match(globalStyles, /\.conversation:not\(\.is-empty\):not\(\.is-rectification\) \+ \.composer-wrap \.composer[^\{]*\{[^}]*width:\s*min\(var\(--session-column-width\),\s*100%\)/);
  // 原值：`.composer-footer` 与 `.composer` 同宽 / 新值：只剩 `.composer`（上一条已断言）
  // / 原因：常驻底栏已删，工具行移进输入框内部，不再有第二个需要对齐的盒子。
  assert.doesNotMatch(globalStyles, /\.composer-footer\s*\{/);
});

test("keeps onboarding transcript and intake card on the same session column", () => {
  const pageSource = readProjectFile("src/app/page.tsx");
  assert.match(pageSource, /\$\{!profileComplete \? " is-onboarding" : ""\}/);
  assert.match(globalStyles, /\.conversation\.is-onboarding \.welcome \{[\s\S]*width:\s*min\(calc\(var\(--session-column-width\) \+ \(var\(--session-column-gutter\) \* 2\)\), 100%\)/);
  assert.match(globalStyles, /\.conversation\.is-onboarding\.is-empty \.welcome \{[\s\S]*width:\s*min\(var\(--session-column-width\), 100%\)/);
  assert.match(globalStyles, /\.conversation\.is-onboarding \.onboarding-card,\s*\n\.conversation\.is-onboarding \.onboarding-card\.birth-time-transition-card \{[\s\S]*width:\s*100%;[\s\S]*max-width:\s*none/);
  assert.match(globalStyles, /\.conversation\.is-onboarding-form \.welcome \{[\s\S]*padding:\s*var\(--space-6\) var\(--session-column-gutter\) var\(--space-8\)/);
});

test("centers the starter home even when the conversation grid is not is-empty", () => {
  const pageSource = readProjectFile("src/app/page.tsx");
  // 原值：空态 `.welcome` 与 `.starter-list` 都是 1040px
  // 新值：`.welcome` 收到 `--session-column-width`，`.starter-list` 已删
  // 原因：空态输入框此前 1040px、会话态 760px，首条消息落地时输入框会当场变窄一截。
  // 现在两态同宽——这比原断言更强：它顺带锁住了「不跳宽度」。
  assert.match(globalStyles, /\.welcome \{\s*width:\s*min\(var\(--session-column-width\), 100%\);\s*margin-inline:\s*auto;/);
  assert.match(globalStyles, /\.composer-wrap-starter \.composer \{\s*width:\s*min\(var\(--session-column-width\), 100%\);/);
  assert.doesNotMatch(globalStyles, /\.starter-list/);
  assert.match(
    pageSource,
    /!onboardingFormActive && !activeSession\?\.messages\.length && \(Boolean\(activeSession\?\.messagesHydrated\) \|\| activeSession\?\.sessionType !== "consultation"\) \? " is-empty"/,
  );
});

test("keeps message motion restrained and honors reduced-motion preferences", () => {
  assert.match(messageRowSource, /gsap\.matchMedia\(\)/);
  assert.match(messageRowSource, /prefers-reduced-motion:\s*no-preference/);
  // Former value: `duration:\s*0\.18`. DESIGN.md §6 gives the message entrance 160ms; 0.18 was
  // the GSAP copy drifting from the (now removed) 160ms CSS keyframe that ran alongside it.
  assert.match(messageRowSource, /duration:\s*0\.16/);
  assert.match(messageRowSource, /ease:\s*"cubic-bezier\(\.22,\s*1,\s*\.36,\s*1\)"/);
  assert.match(messageRowSource, /clearProps:\s*"opacity,transform,visibility"/);
});

test("lets model controls fit their labels and keeps the stop action on-brand", () => {
  assert.match(globalStyles, /\.model-selector-trigger\s*\{[^}]*width:\s*fit-content/);
  assert.match(globalStyles, /\.model-selector-popup\s*\{[^}]*width:\s*max-content[^}]*min-width:\s*180px[^}]*max-width:\s*min\(420px,/);
  assert.match(globalStyles, /\.model-selector-copy b\s*\{[^}]*overflow:\s*visible[^}]*white-space:\s*normal/);
  assert.doesNotMatch(globalStyles, /\.model-selector-copy b\s*\{[^}]*text-overflow:\s*ellipsis/);
  // 原值 `var(--color-action)` / 新值 `var(--color-action-strong)` / 原因：停止键是填充面，
  // 走品牌 coral 那一阶；文字阶留给 --color-action。见 BUG-738。
  assert.match(globalStyles, /\.composer \.composer-stop\s*\{[^}]*background:\s*var\(--color-action-strong\)/);
  assert.match(globalStyles, /\.composer \.composer-stop:not\(:disabled\):hover\s*\{[^}]*background:\s*var\(--color-action-hover\)/);
});