<?php

namespace CorpusParole\Http\Controllers\Api;

use Illuminate\Http\Request;

use CorpusParole\Http\Controllers\Controller;

use CorpusParole\Libraries\Filters\CorpusFilterManager;

use Es;

class LanguageController extends Controller

{

    /**

     * Display the specified resource.

     *

     * @return \Illuminate\Http\Response

     */

    public function index(Request $request)

    {

        $filterManager = new CorpusFilterManager();

        $filters = $filterManager->prepareFilters($request);

        unset($filters['language']);

        $qFilterParts = $filterManager->buildESFilters($filters);

        $query = $filterManager->buildQuery($qFilterParts);

        $esQuery = [

            'index' => config('elasticsearch.index'),

            'body' => [

                "size" => 0,

                "query" => $query,

                "aggs" => [

                    "languages" => [

                        "terms" => [ "field" => "language", "order" => [ "_count" => "desc" ], "size" => 2147483647 ]

                    ]

                ]

            ]

        ];

        $esRes = Es::search($esQuery);

        $languages = [];

        foreach ($esRes['aggregations']['languages']['buckets'] as $b) {

            $languages[$b['key']] = $b['doc_count'];

        }

        return response()->json(['languages' => $languages ]);

    }

}