<?php

namespace BRSystems\Core\Cms\cmsTextManager\inc;

use BRSystems\Core\Library\cApc\cApc;

/**
 * Text manager APC cache helper.
 */
class cmsTextManagerCache
{
    const DEFAULT_PREFIX = 'TM_';
    const DEFAULT_TTL = 86400;

    /** @var cApc */
    private $apc;

    /** @var string */
    private $prefix;

    /** @var int */
    private $ttl;

    public function __construct(cApc $apc, $prefix = self::DEFAULT_PREFIX, $ttl = self::DEFAULT_TTL)
    {
        $this->apc = $apc;
        $this->prefix = (string)$prefix;
        $this->ttl = (int)$ttl;
    }

    public function key($type, $langId)
    {
        return $this->prefix . $this->normalizeType($type) . '_LANG_' . (int)$langId;
    }

    public function get($type, $langId)
    {
        if (!$this->apc->enabled) {
            return false;
        }

        $cached = $this->apc->check($this->key($type, $langId));
        if (!is_array($cached) || !array_key_exists('payload', $cached)) {
            return false;
        }

        return $cached['payload'];
    }

    public function set($type, $langId, $data, $ttl = null)
    {
        if (!$this->apc->enabled) {
            return false;
        }

        $this->apc->store($this->key($type, $langId), ['payload' => $data], ($ttl !== null ? (int)$ttl : $this->ttl));
        return true;
    }

    public function delete($type, $langId)
    {
        if (!$this->apc->enabled) {
            return false;
        }

        $this->apc->setExpired($this->key($type, $langId));
        return true;
    }

    private function normalizeType($type)
    {
        if (is_array($type)) {
            $type = array_map('strval', $type);
            sort($type, SORT_STRING);
            return implode('_', $type);
        }

        return (string)$type;
    }
}