import { createApplicationError } from '../../../shared/errors/application-error.js';

function coerceNumber(value, fieldName, fallback) {
  if (value === undefined || value === null || value === '') {
    return fallback;
  }

  const parsed = Number.parseInt(String(value), 10);
  if (Number.isNaN(parsed) || String(parsed) !== String(value)) {
    throw createApplicationError('INVALID_SEARCH_FILTER', `${fieldName} must be an integer.`, 400);
  }
  return parsed;
}

export async function registerPublicSearchRoutes(app, options) {
  const { searchService } = options;

  app.get('/public/search', async (request) => {
    if (!searchService || typeof searchService.searchPublic !== 'function') {
      throw createApplicationError(
        'SEARCH_SERVICE_UNAVAILABLE',
        'Public search is currently unavailable.',
        503,
      );
    }

    const filters = {
      query: request.query.query,
      category: request.query.category,
      minPriceMinor: coerceNumber(request.query.minPriceMinor, 'minPriceMinor', undefined),
      maxPriceMinor: coerceNumber(request.query.maxPriceMinor, 'maxPriceMinor', undefined),
      page: coerceNumber(request.query.page, 'page', 1),
      limit: coerceNumber(request.query.limit, 'limit', 20),
      includeSold: request.query.includeSold === 'true' || request.query.includeSold === true,
    };

    return { data: await searchService.searchPublic(filters) };
  });
}