<?php

class AcsCostCalculation
{
    function calculate(
        $sender_country,
        $sender_zipcode,
        $sender_billing_code,
        $recipient_country,
        $recipient_zipcode
    )
    {
        preg_match('/\d([^\d]{2})\d+/u', $sender_billing_code, $matches);
        $sender_store = $matches[1] ?? null;
        $sender_zipcode_data = $this->getDataFromZipcode($sender_zipcode);
        $recipient_zipcode_data = $this->getDataFromZipcode($recipient_zipcode);

        if (!in_array($recipient_country, ['GR', 'CY']) && !in_array($sender_country, ['GR', 'CY'])) {
            return false;
        }

        if ($sender_country === 'CY' && $recipient_country === 'CY') {
            return 'internal_cyprus';
        }

        if ($sender_country === 'CY' || $recipient_country === 'CY') {
            return 'cyprus';
        }

        if ($sender_store == $recipient_zipcode_data['store']) {
            return 'same_city';
        }

        if ($recipient_zipcode_data['category'] == 'ΝΗΣΙΩΤΙΚΟΣ') {
            return 'island';
        }

        if (
            $recipient_zipcode_data['region'] != ''
            && $sender_zipcode_data['region'] != ''
            && $recipient_zipcode_data['region'] == $sender_zipcode_data['region']
        ) {
            return 'region';
        }

        return 'overland';
    }

    private function getDataFromZipcode($recipient_zipcode)
    {
        $json = file_get_contents(__DIR__ . '/mapper.json');
        $data = json_decode($json, true);

        return [
            'store' => $data[$recipient_zipcode]['store'] ?? null,
            'category' => $data[$recipient_zipcode]['category'] ?? null,
            'region' => $data[$recipient_zipcode]['region'] ?? null,
        ];
    }
}