import type { Db } from '../db';
import { isUniqueViolation, RuleError } from './accountRules';
import type { Shop } from './shopScope';

export interface ShopListing extends Shop {
  active: boolean;
}

export const SHOP_NAME_MAX = 100;
export const SHOP_CODE_MAX = 20;

export function createShop(db: Db, input: { name: string; code: string }): Shop {
  const name = input.name.trim();
  const code = input.code.trim();
  if (name === '' || name.length > SHOP_NAME_MAX) {
    throw new RuleError('invalid', `the shop name must be 1 to ${SHOP_NAME_MAX} characters`);
  }
  if (code === '' || code.length > SHOP_CODE_MAX || /\s/.test(code)) {
    throw new RuleError('invalid', `the shop code must be 1 to ${SHOP_CODE_MAX} characters with no spaces`);
  }

  const sameName = db.prepare('SELECT 1 FROM shops WHERE active = 1 AND lower(name) = lower(?)').get(name);
  if (sameName) throw new RuleError('conflict', 'an active shop already has that name');

  try {
    const id = Number(db.prepare('INSERT INTO shops (name, code) VALUES (?, ?)').run(name, code).lastInsertRowid);
    return { id, name, code };
  } catch (e) {
    if (isUniqueViolation(e)) throw new RuleError('conflict', 'that shop code is already used');
    throw e;
  }
}

export function listShops(db: Db): ShopListing[] {
  const rows = db.prepare('SELECT id, name, code, active FROM shops ORDER BY name, id').all() as Array<
    Shop & { active: number }
  >;
  return rows.map((r) => ({ id: r.id, name: r.name, code: r.code, active: r.active === 1 }));
}