<?php

namespace CorpusParole\Http\Controllers\Api;

// use Illuminate\Http\Request;

// use CorpusParole\Http\Requests;

use CorpusParole\Http\Controllers\Controller;

use Illuminate\Http\Request;

use EasyRdf\Resource;

use EasyRdf\Literal;

use Es;

use Log;

use CorpusParole\Libraries\Sparql\SparqlClient;

use CorpusParole\Services\LexvoResolverInterface;

use CorpusParole\Services\BnfResolverInterface;

class ThemeController extends Controller

{

    private $sparqlClient = null;

    public function __construct(SparqlClient $sparqlClient, LexvoResolverInterface $lexvoResolver, BnfResolverInterface $bnfResolver) {

        $this->sparqlClient = $sparqlClient;

        $this->lexvoResolver = $lexvoResolver;

        $this->bnfResolver = $bnfResolver;

    }

    /**

     * Display the specified resource.

     *

     * @return \Illuminate\Http\Response

     */

    public function index(Request $request)

    {

        $index = $request->input('index', 0);

        $sort = $request->input('sort', 'count');

        if($sort == "count" || $sort == "descending") {

            $order_field = "_count";

            $order_dir = "desc";

        } elseif($sort == "-count") {

            $order_field = "_count";

            $order_dir = "asc";

        } elseif ($sort == "label" || $sort == "alphabetical") {

            $order_field = "_term";

            $order_dir = "asc";

        } elseif ($sort == "-label") {

            $order_field = "_term";

            $order_dir = "desc";

        } else {

            $order_field = "_count";

            $order_dir = "desc";

        }

        $query = [

            'index' => env('ELASTICSEARCH_INDEX'),

            'body' => [

                'size' => 0,

                'aggs' => [

                    "subjects" => [

                        "nested" => [ "path" => "subject" ],

                        "aggs" => [

                            "subjects" => [

                                "terms" => [

                                    "field" => "subject.label_code",

                                    "size" => $limit * ($index+1),

                                    "order" => [ $order_field => $order_dir ]

                                ]

                            ]

                        ]

                    ]

                ]

            ]

        ];

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

        $themes = [];

        $bucketList = array_slice($esRes['aggregations']['subjects']['subjects']['buckets'], $index*$limit, $limit);

        foreach($bucketList as $bucket) {

            $parts = explode("|", $bucket['key']);

            $label = $parts[0];

            $themes[$url] = [

                "label" => $label,

                "count" => $bucket['doc_count']

            ];

        }

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

    }

}