import assert from "node:assert/strict";
import { existsSync, readFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import test from "node:test";

import {
  ACTIVITY_APPLY_SQL,
  TITLE_APPLY_SQL,
  TITLE_MATCH_SQL,
} from "../scripts/repair-rectification-session-titles.mjs";

const filename = "20260916020000_rectification_session_title_repair.sql";
const migration = readFileSync(
  new URL(`../supabase/migrations/${filename}`, import.meta.url),
  "utf8",
);

// Only trailing whitespace differs: the script builds `where ${TITLE_MATCH_SQL}`,
// which leaves a space before the newline that no .sql file should carry.
const normalize = (value: string) => value.replace(/[ \t]+$/gm, "").trim();

test("repair migration carries the checker's SQL verbatim", () => {
  for (const [name, sql] of [
    ["TITLE_MATCH_SQL", TITLE_MATCH_SQL],
    ["TITLE_APPLY_SQL", TITLE_APPLY_SQL],
    ["ACTIVITY_APPLY_SQL", ACTIVITY_APPLY_SQL],
  ] as const) {
    assert.ok(
      normalize(migration).includes(normalize(sql)),
      `${name} must be copied into ${filename} without being rewritten`,
    );
  }
});

test("repair migration keeps the guards that make it safe to re-run", () => {
  // Asia/Shanghai, not UTC: the wall-clock date is what the user reads (BUG-699).
  assert.match(migration, /at time zone 'Asia\/Shanghai'/);
  // Never guess a date when created_at is missing.
  assert.match(migration, /when created_at is null then '生时校正'/);
  // Monotonic: updated_at only moves forward (BUG-704).
  assert.match(
    migration,
    /session\.updated_at < coalesce\(turns\.last_turn_at, case_row\.last_activity_at\)/,
  );
  // Only schema_owner may run it, like every other business migration.
  assert.match(migration, /rectification_session_title_repair_requires_schema_owner/);
  assert.match(migration, /^begin;[\s\S]*^commit;$/m);
});

test("repair migration reports its row counts so staging logs show a number", () => {
  assert.match(migration, /get diagnostics repaired_titles = row_count;/);
  assert.match(migration, /get diagnostics refreshed_activity = row_count;/);
  assert.match(migration, /raise notice '[^']*repaired_titles=%', repaired_titles;/);
  assert.match(migration, /raise notice '[^']*refreshed_activity=%', refreshed_activity;/);

  // The counts only reach the log because the migrator forwards notices.
  const migrator = readFileSync(
    new URL("../scripts/db-migrate.mjs", import.meta.url),
    "utf8",
  );
  assert.match(migrator, /client\.on\("notice"/);
});

test("repair migration sorts last and is not copied into the identity foundation", () => {
  assert.ok(filename > "20260916010000_consultation_session_capacity.sql");
  assert.match(filename, /^\d{14}_[a-z0-9_]+\.sql$/);
  assert.equal(
    existsSync(fileURLToPath(new URL(`../db/migrations/${filename}`, import.meta.url))),
    false,
    "business migration must not be copied into frontend/db/migrations (BUG-127/BUG-144)",
  );
});

test("the checker no longer writes; --apply points at the migration", () => {
  const checker = readFileSync(
    new URL("../scripts/repair-rectification-session-titles.mjs", import.meta.url),
    "utf8",
  );
  assert.match(checker, /--apply has been removed/);
  assert.match(checker, new RegExp(filename.replace(/\./g, "\\.")));
  // Importing it must not have opened a connection.
  assert.match(checker, /invokedPath === import\.meta\.url/);
});