<?php

namespace Kaizen_Coders\Url_Shortify;

/**
 * Class Cache
 *
 * @since 1.0.0
 */
class Cache {
    /**
     * Cache version
     *
     * @var string
     *
     * @since 1.2.4
     */
    static $version = '1.0';

    /**
     * Cache Prefix
     *
     * @var string
     *
     * @since 1.0.0
     */
    static $prefix = 'kc_us_';

    /** @var bool */
    static $enabled = true;

    /**
     * Get prefix
     *
     * @return string
     *
     * @since 1.2.9
     */
    static function get_prefix() {
        return self::$prefix . str_replace( '.', '', self::$version ) . '_';
    }

    /**
     * @return mixed|void
     */
    static function get_default_transient_expiration() {
        return apply_filters( 'cache_default_expiration', 10 );
    }

    /**
     * @param $key
     * @param $value
     * @param int $expiration Seconds
     *
     * @return bool
     */
    static function set_transient( $key, $value, $expiration = 3600 ) {
        if ( ! self::$enabled ) {
            return false;
        }
        if ( ! $expiration ) {
            $expiration = self::get_default_transient_expiration();
        }

        return set_transient( self::get_prefix() . 'cache_' . $key, $value, $expiration );
    }

    /**
     * @param string $key
     *
     * @return bool|mixed
     *
     * @since 1.0.0
     */
    static function get_transient( $key ) {
        if ( ! self::$enabled ) {
            return false;
        }

        return get_transient( self::get_prefix() . 'cache_' . $key );
    }

    /**
     * @param $key
     *
     * @since 1.0.0
     */
    static function delete_transient( $key ) {
        delete_transient( self::get_prefix() . 'cache_' . $key );
    }

    /**
     * Only sets if key is not falsy
     *
     * @param string $key
     * @param mixed $value
     * @param string $group
     *
     * @since 1.0.0
     */
    static function set( $key, $value, $group ) {
        if ( ! $key ) {
            return;
        }

        wp_cache_set( (string) $key, $value, self::get_prefix() . $group );
    }

    /**
     * Only gets if key is not falsy
     *
     * @param $key
     * @param $group
     * @param false $force
     * @param null $found
     *
     * @return false|mixed
     *
     * @since 1.0.0
     */
    static function get( $key, $group, $force = false, &$found = null ) {
        if ( ! $key ) {
            return false;
        }

        return wp_cache_get( (string) $key, self::get_prefix() . $group, $force, $found );
    }

    /**
     * @param string $key
     * @param string $group
     *
     * @return bool
     *
     * @since 1.0.0
     */
    static function exists( $key, $group ) {
        if ( ! $key ) {
            return false;
        }
        $found = false;

        wp_cache_get( (string) $key, self::get_prefix() . $group, false, $found );

        return $found;
    }


    /**
     * Only deletes if key is not falsy
     *
     * @param string $key
     * @param string $group
     *
     * @since 1.0.0
     */
    static function delete( $key, $group ) {
        if ( ! $key ) {
            return;
        }

        wp_cache_delete( (string) $key, self::get_prefix() . $group );
    }

    /**
     * Generate key
     *
     * @param string $string
     *
     * @return string
     *
     * @since 1.4.7
     */
    static function generate_key( $string = '' ) {

        if ( empty( $string ) ) {
            return 'dummy';
        }

        return md5( $string );
    }

}