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

import { isAutoDerivedSessionTitle, shouldGenerateSessionTitle } from "../src/lib/session-title.ts";

// BUG-987 and BUG-992 were two copies of one rule with nobody comparing them.
// This test reads the SQL predicate from the migration. Do not paste a second copy.

const migration = readFileSync(
  new URL("../supabase/migrations/20260925010000_rectification_session_title_result.sql", import.meta.url),
  "utf8",
);

const functionBody = migration.match(
  /create or replace function public\.rectification_session_title_is_automatic[\s\S]*?as \$\$([\s\S]*?)\$\$;/,
);
assert.ok(functionBody, "migration must define rectification_session_title_is_automatic");
const pattern = functionBody[1].match(/~ '([^']+)'/)?.[1];
assert.ok(pattern, "automatic-title predicate must be one quoted regex");
const sqlWouldOverwrite = new RegExp(pattern);

const EN_DASH = "\u2013";
const cases: ReadonlyArray<readonly [string, boolean]> = [
  ["生时校正", true],
  ["生时校正 · 05:07", true],
  [`生时校正 · 05:00${EN_DASH}05:15`, true],
  ["生时校正 · 9月17日", true],
  ["9月17日 · 生时校正", true],
  ["9月17日 · 生时校正 09:35", true],
  ["我的校正", false],
  ["今日节奏 · 9月17日", true],
  ["9月17日 · 今日节奏", true],
  ["9月17日 · 今日节奏 09:35", true],
];

test("SQL overwrite predicate and isAutoDerivedSessionTitle agree", () => {
  assert.match(pattern, new RegExp(String.raw`\[0-9\]\{2\}:\[0-9\]\{2\}${EN_DASH}\[0-9\]\{2\}:\[0-9\]\{2\}`));
  assert.doesNotMatch(pattern, /\[0-9\]\{2\}:\[0-9\]\{2\}-\[0-9\]\{2\}:\[0-9\]\{2\}/);
  for (const [title, automatic] of cases) {
    assert.equal(sqlWouldOverwrite.test(title), automatic, `sql ${title}`);
    assert.equal(isAutoDerivedSessionTitle(title), automatic, `ts ${title}`);
  }
  assert.equal(sqlWouldOverwrite.test(`生时校正 · 05:00-05:15`), false);
  assert.equal(shouldGenerateSessionTitle({ title: "生时校正", sessionType: "birth_time_rectification" }, []), false);
  assert.equal(shouldGenerateSessionTitle({ title: "生时校正 · 05:07", sessionType: "birth_time_rectification" }, []), false);
});