import FacetStatement from '../../src/Statements/FacetStatement';
import SphinxClient from '../../src/SphinxClient';
import Expression from '../../src/Statements/Expression';
require('iconv-lite').encodingExists('foo');  // fix bug with mysql2 and Jest

describe('Tests for FACET expressions', () => {
  const params = {
    host: '127.0.0.1',
    port: 9307,
    multipleStatements: true, // set to true for enabling faceted query results
  };

  const connection = new SphinxClient(params);

  afterAll(() => {
    connection.close();
  })

  test('simple FACET by columns', () => {
    const facet = new FacetStatement(connection);
    facet.field('category_id');
    expect(facet.build()).toBe('category_id');
    
    facet.fields(['year', 'product_id']);
    expect(facet.build()).toBe('category_id, year, product_id');

    facet.field(Expression.raw('COUNT(something)'));
    expect(facet.build()).toBe('category_id, year, product_id, COUNT(something)');
  });

  test('by expression with different values', () => {
    const facet = new FacetStatement(connection);
    facet
      .fields(['category_id', 'product_id'])
      .by(['category_id', 'product_id']);
    expect(facet.build()).toBe(`category_id, product_id BY category_id, product_id`);
  });

  test('limit expression with and without offset', () => {
    const facet = new FacetStatement(connection);
    facet
      .fields(['category_id', 'product_id'])
      .offset(5);
    
    expect(facet.build()).toBe(`category_id, product_id LIMIT 5, 5`);  
    
    facet.limit(10);
    expect(facet.build()).toBe(`category_id, product_id LIMIT 5, 10`);
  });

  test('group by method with expressions and string', () => {
    const facet = new FacetStatement(connection);

    facet.field('category_id').orderBy(Expression.raw('FACET()'), 'DESC');
    expect(facet.build()).toBe('category_id ORDER BY FACET() DESC');
  });

  test('all facet methods working together', () => {
    const facet = new FacetStatement(connection);
    facet
      .fields([Expression.raw('price_range AS fprice_range'), 'brand_name'])
      .orderBy('brand_name', 'ASC');

    expect(facet.build()).toBe('price_range AS fprice_range, brand_name ORDER BY brand_name ASC');

    facet.limit();

    expect(facet.build()).toBe('price_range AS fprice_range, brand_name ORDER BY brand_name ASC LIMIT 5');
  });
});