import assert from "node:assert/strict";
import test from "node:test";
import {
  createPublicThinkingSanitizer,
  sanitizePublicThinkingText,
} from "../src/lib/public-thinking.ts";

function chunksOf(text: string, size: number): string[] {
  const chunks: string[] = [];
  for (let index = 0; index < text.length; index += size) {
    chunks.push(text.slice(index, index + size));
  }
  return chunks;
}

function feed(text: string, size: number): string {
  const sanitizer = createPublicThinkingSanitizer();
  let released = "";
  for (const chunk of chunksOf(text, size)) {
    released += sanitizer.push(chunk) ?? "";
  }
  released += sanitizer.flush() ?? "";
  return released;
}

const INCIDENT_ENGLISH = [
  "The a for 2026-09-09 (, per). The is a - an, not a.",
  'The be "" or "timing" - is a/trend.',
  'Let me use: [""]. "timing"? Let me run-jyotish-.',
].join(" ");

test("incident English salad fed in 3-6 character chunks never reaches the public channel", () => {
  const chinese = "今日宜推进合同细节。";
  for (const size of [3, 4, 5, 6]) {
    const released = feed(`${INCIDENT_ENGLISH} ${chinese}`, size);
    assert.match(released, /今日宜推进合同细节/);
    assert.doesNotMatch(released, /[A-Za-z]{4,}/);
    assert.doesNotMatch(released, /run-jyotish/);
  }
});

test("pure Chinese thinking is unchanged", () => {
  const chinese = "先对照今日过境。再分开适合推进的事。";
  assert.equal(feed(chinese, 4), chinese);
  assert.equal(sanitizePublicThinkingText(chinese), chinese);
});

test("CJK sentences keep Chinese and drop four-letter English words", () => {
  assert.equal(
    sanitizePublicThinkingText("今日趋势 timing 可以推进。"),
    "今日趋势 可以推进。",
  );
});

test("English-only process narration is dropped even without a terminator", () => {
  assert.equal(sanitizePublicThinkingText("The proposedKind value was rejected"), null);
});

test("an unterminated English chunk does not glue onto the following Chinese sentence", () => {
  const sanitizer = createPublicThinkingSanitizer();
  assert.equal(sanitizer.push("The proposedKind value was rejected"), null);
  assert.equal(sanitizer.push("先看事业宫的结构。"), "先看事业宫的结构。");
  assert.equal(sanitizer.flush(), null);
});