<?php

namespace Elastica\Query;
use Elastica\Exception\InvalidException;

/**
 * Terms query
 *
 * @category Xodoa
 * @package Elastica
 * @author Nicolas Ruflin <spam@ruflin.com>
 * @link http://www.elasticsearch.org/guide/reference/query-dsl/terms-query.html
 */
class Terms extends AbstractQuery
{
    /**
     * Terms
     *
     * @var array Terms
     */
    protected $_terms = array();

    /**
     * Params
     *
     * @var array Params
     */
    protected $_params = array();

    /**
     * Terms key
     *
     * @var string Terms key
     */
    protected $_key = '';

    /**
     * Construct terms query
     *
     * @param string $key   OPTIONAL Terms key
     * @param array  $terms OPTIONAL Terms list
     */
    public function __construct($key = '', array $terms = array())
    {
        $this->setTerms($key, $terms);
    }

    /**
     * Sets key and terms for the query
     *
     * @param  string                    $key   Terms key
     * @param  array                     $terms Terms for the query.
     * @return \Elastica\Query\Terms
     */
    public function setTerms($key, array $terms)
    {
        $this->_key = $key;
        $this->_terms = array_values($terms);

        return $this;
    }

    /**
     * Adds a single term to the list
     *
     * @param  string                    $term Term
     * @return \Elastica\Query\Terms
     */
    public function addTerm($term)
    {
        $this->_terms[] = $term;

        return $this;
    }

    /**
     * Sets the minimum matching values
     *
     * @param  int                       $minimum Minimum value
     * @return \Elastica\Query\Terms
     */
    public function setMinimumMatch($minimum)
    {
        return $this->setParam('minimum_match', (int) $minimum);
    }

    /**
     * Converts the terms object to an array
     *
     * @see \Elastica\Query\AbstractQuery::toArray()
     * @throws \Elastica\Exception\InvalidException
     * @return array                               Query array
     */
    public function toArray()
    {
        if (empty($this->_key)) {
            throw new InvalidException('Terms key has to be set');
        }
        $this->setParam($this->_key, $this->_terms);

        return parent::toArray();
    }
}