<?php


namespace app;


use CcCedict\Entry;
use CcCedict\Parser;
use Workerman\Protocols\Http\Request;
use Workerman\Protocols\Http\Response;

/**
 * Class Dictionary
 * The word dictionary of this website is based on CC-CEDICT.
 * CC-CEDICT is a continuation of the CEDICT project started by Paul Denisowski in 1997 with the aim to provide a complete
 * downloadable Chinese to English dictionary with pronunciation in pinyin for the Chinese characters.
 * This website allows you to easily add new entries or correct existing entries in CC-CEDICT.
 * Submitted entries will be checked and processed frequently and released for download in CEDICT format on this page.
 * https://www.mdbg.net/chinese/dictionary?page=cc-cedict
 * @package app
 */
class Dictionary extends Api
{

    private $dictionary = [];


    public function __construct()
    {
        if (empty($this->dictionary)) $this->initDictionary();
    }

    private function initDictionary()
    {
        $this->log("start load english dictionary ...");
        $file = __DIR__ . '/files/cedict_ts.u8';
        $dict_file = __DIR__ . '/files/dict.json';
        if (file_exists($dict_file)) {
            $this->dictionary = json_decode(file_get_contents($dict_file), true);
            $this->log("loaded dictionary!");
            return;
        }


        $parser = new Parser();
        $parser->setOptions([
            Entry::F_SIMPLIFIED,
            Entry::F_PINYIN_DIACRITIC,
            Entry::F_ENGLISH_EXPANDED,
//            Entry::F_PINYIN_DIACRITIC_EXPANDED,
//            Entry::F_ORIGINAL,
        ]);

        $parser->setFilePath($file);

        $dict = [];
        $this->log("start parse dictionary ...");
        foreach ($parser->parse() as $output) {
            foreach ($output['parsedLines'] as $line) {
                if(!isset($dict[$line['simplified']])){
                    $dict[$line['simplified']] = [];
                }
                $dict[$line['simplified']][] = $line;
            }
        }

        file_put_contents($dict_file, json_encode($dict, JSON_UNESCAPED_UNICODE));
        $this->dictionary = $dict;
        $this->log("load english dictionary finish!");
    }

    /**
     * @param Request $request
     * @return Response
     * @throws \Exception
     */
    public function handle(Request $request)
    {
        $word = $request->get('word');
        if (empty($word)) return $this->error('need query word');
        if (isset($this->dictionary[$word])) {
            return $this->success($this->dictionary[$word]);
        }
        return $this->json([]);
    }
}