/**
 * One-off: attach missing business owners from contactPhone.
 * Usage: node --import ts-node/register/esm OR npx ts-node -r dotenv/config scripts/backfill-business-owners.ts
 */
import 'dotenv/config';
import { DataSource } from 'typeorm';
import { join } from 'path';

const PERSIAN_DIGITS = '۰۱۲۳۴۵۶۷۸۹';
const ARABIC_DIGITS = '٠١٢٣٤٥٦٧٨٩';
const INVISIBLE_CHARS = /[\u200c\u200d\u202a-\u202e\ufeff]/g;
const IRAN_MOBILE_REGEX = /^09\d{9}$/;

function toAsciiDigits(value: string): string {
  return value.replace(/[۰-۹٠-٩]/g, (ch) => {
    const persian = PERSIAN_DIGITS.indexOf(ch);
    if (persian >= 0) return String(persian);
    const arabic = ARABIC_DIGITS.indexOf(ch);
    if (arabic >= 0) return String(arabic);
    return ch;
  });
}

function normalizeIranMobile(raw: string): string {
  let mobile = toAsciiDigits(String(raw ?? '').trim());
  mobile = mobile.replace(INVISIBLE_CHARS, '');
  let digits = mobile.replace(/\D/g, '');
  if (!digits) return '';
  if (digits.startsWith('0098')) digits = digits.slice(2);
  if (digits.startsWith('98') && digits.length >= 12) {
    digits = `0${digits.slice(2)}`;
  } else if (digits.startsWith('9') && digits.length === 10) {
    digits = `0${digits}`;
  }
  return digits;
}

function isValidIranMobile(mobile: string): boolean {
  return IRAN_MOBILE_REGEX.test(mobile);
}

async function main() {
  const ds = new DataSource({
    type: 'postgres',
    host: process.env.DB_HOST,
    port: parseInt(process.env.POSTGRES_PORT || '5432', 10),
    username: process.env.POSTGRES_USER,
    password: process.env.POSTGRES_PASSWORD,
    database: process.env.POSTGRES_DB,
    entities: [],
    synchronize: false,
  });

  await ds.initialize();
  console.log('Connected to', process.env.POSTGRES_DB);

  const businesses: Array<{
    id: string;
    title: string;
    contactPhone: string | null;
    ownerId: string | null;
  }> = await ds.query(`
    SELECT b.id, b.title, b."contactPhone", b."ownerId"
    FROM businesses b
    LEFT JOIN users u ON u.id = b."ownerId"
    WHERE b."contactPhone" IS NOT NULL
      AND b."contactPhone" <> ''
      AND (b."ownerId" IS NULL OR u.id IS NULL)
    ORDER BY b."createdAt" ASC
  `);

  console.log(`Found ${businesses.length} business(es) needing owner backfill`);

  let created = 0;
  let linked = 0;
  let skipped = 0;

  for (const biz of businesses) {
    const mobile = normalizeIranMobile(biz.contactPhone ?? '');
    if (!isValidIranMobile(mobile)) {
      console.log(`SKIP ${biz.title}: invalid mobile "${biz.contactPhone}"`);
      skipped += 1;
      continue;
    }

    const defaultName = `مدیر ${biz.title}`;

    let users: Array<{ id: string; fullName: string | null; role: string }> =
      await ds.query(`SELECT id, "fullName", role FROM users WHERE mobile = $1 LIMIT 1`, [
        mobile,
      ]);

    let userId: string;
    if (!users.length) {
      const inserted: Array<{ id: string }> = await ds.query(
        `
        INSERT INTO users (id, mobile, "fullName", role, "isActive", "createdAt", "updatedAt")
        VALUES (gen_random_uuid(), $1, $2, 'business_owner', true, NOW(), NOW())
        RETURNING id
        `,
        [mobile, defaultName],
      );
      userId = inserted[0].id;
      created += 1;
      console.log(`CREATE user ${mobile} (${defaultName}) → ${biz.title}`);
    } else {
      userId = users[0].id;
      const updates: string[] = [];
      const params: unknown[] = [];

      if (users[0].role !== 'admin') {
        params.push('business_owner');
        updates.push(`role = $${params.length}`);
      }
      if (!users[0].fullName?.trim()) {
        params.push(defaultName);
        updates.push(`"fullName" = $${params.length}`);
      }
      params.push(true);
      updates.push(`"isActive" = $${params.length}`);
      params.push(userId);
      await ds.query(
        `UPDATE users SET ${updates.join(', ')}, "updatedAt" = NOW() WHERE id = $${params.length}`,
        params,
      );
      linked += 1;
      console.log(`LINK existing user ${mobile} → ${biz.title}`);
    }

    await ds.query(
      `UPDATE businesses SET "ownerId" = $1, "contactPhone" = $2, "updatedAt" = NOW() WHERE id = $3`,
      [userId, mobile, biz.id],
    );
  }

  console.log(`Done. created=${created} linked=${linked} skipped=${skipped}`);
  await ds.destroy();
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
});