<?php

class CountryHandler
{
    private array $countries;

    private array $default = [
        [
            'en' => 'Hungary',
            'hu' => 'Magyarország',
            'code' => 'HU'
        ]
    ];
    /**
     * 
     */
    public function __construct()
    {
        $this->initCountries();
    }
    /**
     * 
     */
    public function initCountries(): void
    {
        $file = __DIR__.DIRECTORY_SEPARATOR.'countries.csv';
        if (file_exists($file)) {
            if (is_readable($file)) {
                // get CSV file rows into array
                $csv = array_map(
                    function ($r) {
                        return str_getcsv($r, ';');
                    }, 
                    file($file)
                );
                // set eys to associative array
                if (count($csv) > 1) {
                    $this->countries = array_map(
                        function ($country) {
                            return array_combine(
                                ['en', 'hu', 'code'],
                                $country
                            );
                        },
                        array_slice($csv, 1)
                    );
                }
            }
        } else {
            $this->countries = $this->default;
        }
    }
    /**
     * 
     */
    public function getCountries(string $lang='hu', string $search=''): array
    {
        $result = [];
        $list = $this->countries;
        $lang = strtolower($lang);
        
        $result = array_filter(
            array_map(
                function ($item) use ($lang, $search) {            
                    $result = null;

                    if (empty($search)) {
                        $result = [
                            'label' => $item[$lang],
                            'code' => $item['code']
                        ];
                    } else {    
                        if (preg_match('/'.$search.'/', strtolower($item[$lang]))) {
                            $result = [
                                'label' => $item[$lang],
                                'code' => $item['code']
                            ];
                        }
                    }
                    
                    return $result;
                },
                $list
            )
        );

        return $result;
    }
}