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

const page = readFileSync(new URL("../src/app/page.tsx", import.meta.url), "utf8");
const rectification = readFileSync(
  new URL("../src/components/rectification-agentic-chat.tsx", import.meta.url),
  "utf8",
);
const guide = readFileSync(new URL("../src/components/birth-time-guide-turn.tsx", import.meta.url), "utf8");

function onKeyDownBlock(source: string, marker: string) {
  const start = source.indexOf(marker);
  assert.notEqual(start, -1, `missing onKeyDown near ${marker}`);
  const slice = source.slice(start, start + 600);
  const handler = slice.match(/onKeyDown=\{\(event\) => \{[\s\S]*?\n\s*\}\}/)
    ?? slice.match(/function handleComposerKeyDown[\s\S]*?\n  \}/);
  assert.ok(handler, `could not isolate onKeyDown from ${marker}`);
  return handler[0];
}

test("all three composers ignore Enter while an IME is composing", () => {
  const main = page.slice(
    page.indexOf("function handleComposerKeyDown"),
    page.indexOf("\n\n  if (!hydrated"),
  );
  const rectificationHandler = onKeyDownBlock(rectification, "onKeyDown={(event) => {");
  const guideHandler = onKeyDownBlock(guide, "onKeyDown={(event) => {");

  for (const [name, handler] of [
    ["main composer", main],
    ["rectification composer", rectificationHandler],
    ["birth-time guide", guideHandler],
  ] as const) {
    assert.match(handler, /event\.nativeEvent\.isComposing/, `${name} must ignore composing Enter`);
  }
});

test("the guide turn sends with Enter and wraps with Shift+Enter, matching the other two", () => {
  const handler = onKeyDownBlock(guide, "onKeyDown={(event) => {");
  assert.match(handler, /event\.key === "Enter" && !event\.shiftKey/);
  assert.doesNotMatch(handler, /metaKey \|\| event\.ctrlKey/);
  assert.match(guide, /Enter 发送，Shift\+Enter 换行/);
});