<?php

namespace Code_Snippets;

use Freemius;
use Freemius_Exception;
use function fs_dynamic_init;
/**
 * Handles interfacing with the Freemius SDK and API.
 *
 * @package Code_Snippets
 */
class Licensing {
    /**
     * Freemius product ID.
     */
    private const PRODUCT_ID = 10565;

    /**
     * Freemius public key.
     */
    private const PUBLIC_KEY = 'pk_107ff34fc0b2a9700c150c1acf13a';

    /**
     * Freemius SDK instance.
     *
     * @var Freemius
     */
    private Freemius $sdk;

    /**
     * Class constructor.
     *
     * @throws Freemius_Exception Freemius fails to initialise.
     */
    public function __construct() {
        $this->enable_multisite_support();
        require_once dirname( CODE_SNIPPETS_FILE ) . '/vendor/freemius/wordpress-sdk/start.php';
        /**
         * Check for constant defined in wp-config.php.
         *
         * @noinspection PhpUndefinedConstantInspection
         */
        $secret_key = ( defined( 'CODE_SNIPPETS_SECRET_KEY' ) ? CODE_SNIPPETS_SECRET_KEY : null );
        $this->sdk = fs_dynamic_init( array(
            'id'               => self::PRODUCT_ID,
            'slug'             => 'code-snippets',
            'premium_slug'     => 'code-snippets-pro',
            'type'             => 'plugin',
            'public_key'       => self::PUBLIC_KEY,
            'is_premium'       => true,
            'is_premium_only'  => true,
            'premium_suffix'   => 'Pro',
            'has_addons'       => false,
            'has_paid_plans'   => true,
            'is_org_compliant' => true,
            'has_affiliation'  => 'selected',
            'menu'             => array(
                'slug'        => code_snippets()->get_menu_slug(),
                'contact'     => false,
                'support'     => false,
                'pricing'     => false,
                'affiliation' => false,
                'network'     => true,
            ),
            'is_live'          => true,
        ) );
        do_action( 'freemius_loaded' );
        $this->register_hooks();
        add_action( 'init', [$this, 'override_strings'] );
    }

    /**
     * Create the necessary constant to enable multisite support within the Freemius SDK.
     *
     * @return void
     */
    private function enable_multisite_support() {
        $constant_name = sprintf( 'WP_FS__PRODUCT_%d_MULTISITE', self::PRODUCT_ID );
        if ( !defined( $constant_name ) ) {
            define( $constant_name, true );
        }
    }

    /**
     * Determine whether the current site has an active license.
     *
     * @return bool
     */
    public function is_licensed() : bool {
        return $this->sdk->can_use_premium_code();
    }

    /**
     * Determine whether the current site has any license, including an expired license.
     *
     * @return bool
     */
    public function was_licensed() : bool {
        return $this->sdk->has_any_license();
    }

    /**
     * Retrieve the current license secret key.
     *
     * @return string|null
     */
    public function get_license_key() : ?string {
        $license = $this->sdk->_get_license();
        return ( $license ? $license->secret_key : null );
    }

    /**
     * Activate a license key.
     *
     * @param string $license_key The license key to activate.
     * @param array  $options     Activation options (network, marketing, etc.).
     * @return array Activation result with 'success' boolean and 'message' string.
     */
    public function activate_license_key( string $license_key, array $options = [] ) : array {
        $license_key = trim( $license_key );
        if ( empty( $license_key ) ) {
            return [
                'success' => false,
                'message' => 'License key cannot be empty.',
            ];
        }
        $fs = $this->sdk;
        if ( $fs->can_use_premium_code() ) {
            return [
                'success' => false,
                'message' => 'Plugin is already licensed. Use this command to change the license key.',
                'type'    => 'warning',
            ];
        }
        $is_network = $options['network'] ?? false;
        $is_marketing_allowed = $options['marketing'] ?? false;
        $sites = $this->prepare_network_sites( $is_network );
        $result = $fs->opt_in(
            false,
            // email (will use current user)
            false,
            // first name
            false,
            // last name
            $license_key,
            // license key
            false,
            // is_uninstall
            false,
            // trial_plan_id
            false,
            // is_disconnected
            $is_marketing_allowed,
            // marketing allowed
            $sites,
            // sites for network activation
            false
        );
        if ( is_object( $result ) && isset( $result->error ) ) {
            $error_message = $result->error->message ?? 'Unknown error occurred.';
            return [
                'success' => false,
                'message' => 'License activation failed: ' . $error_message,
            ];
        } elseif ( $result === false ) {
            return [
                'success' => false,
                'message' => 'License activation failed: Invalid response from server.',
            ];
        } else {
            return [
                'success' => true,
                'message' => 'License activated successfully.',
            ];
        }
    }

    /**
     * Get detailed license status information.
     *
     * @return array License status information.
     */
    public function get_license_status() : array {
        $fs = $this->sdk;
        $license = $this->get_license_object();
        $status_info = [
            'is_licensed' => ( $fs->can_use_premium_code() ? 'Yes' : 'No' ),
            'license_key' => 'Not available',
            'is_expired'  => 'N/A',
            'expires'     => 'N/A',
            'activations' => 'N/A',
        ];
        if ( is_object( $license ) ) {
            $status_info = $this->format_license_status( $license );
        }
        return $status_info;
    }

    /**
     * Register hooks with Freemius.
     *
     * @return void
     */
    public function register_hooks() {
        $this->sdk->add_action( 'after_uninstall', [$this, 'uninstall_hook'] );
        $this->sdk->add_filter(
            'is_submenu_visible',
            [$this, 'is_submenu_visible'],
            10,
            2
        );
        $this->sdk->add_filter( 'plugin_icon', [$this, 'plugin_icon'] );
    }

    /**
     * Get the relative path to the plugin icon.
     *
     * @return string
     */
    public function plugin_icon() : string {
        return dirname( CODE_SNIPPETS_FILE ) . '/assets/icon.svg';
    }

    /**
     * Control whether a Freemius submenu is visible.
     *
     * @param bool   $is_visible Whether the submenu is visible.
     * @param string $submenu_id Submenu ID.
     *
     * @return bool
     */
    public function is_submenu_visible( bool $is_visible, string $submenu_id ) : bool {
        return ( 'account' === $submenu_id ? $is_visible : false );
    }

    /**
     * Clean up data when the plugin is uninstalled.
     *
     * @return void
     */
    public function uninstall_hook() {
        require_once __DIR__ . '/uninstall.php';
        Uninstall\uninstall_plugin();
    }

    /**
     * Override default strings used by Freemius to better integrate it with the rest of the plugin.
     *
     * @return void
     */
    public function override_strings() {
        $this->sdk->override_i18n( array(
            'yee-haw'  => __( 'Success', 'code-snippets' ),
            'oops'     => __( 'Notice', 'code-snippets' ),
            'woot'     => __( 'Success', 'code-snippets' ),
            'right-on' => __( 'Thanks', 'code-snippets' ),
            'ok'       => __( 'Okay', 'code-snippets' ),
        ) );
        $this->sdk->add_filter(
            'connect_message_on_update',
            function (
                $message,
                $user_first_name,
                $product_title,
                $user_login,
                $site_link,
                $freemius_link
            ) {
                /* translators: 1: site url, 2: Freemius link */
                $text = __( 'Please help us improve Code Snippets! If you opt-in, some data about your usage of %1$s will be sent to %2$s. If you skip this, that\'s okay, Code Snippets will still work just fine.', 'code-snippets' );
                return sprintf( $text, $site_link, $freemius_link );
            },
            10,
            6
        );
        $this->sdk->add_filter( 'show_affiliate_program_notice', '__return_false' );
    }

    /**
     * Prepare sites array for network activation.
     *
     * @param bool $is_network Whether this is a network activation.
     * @return array Array of site information for network activation.
     */
    private function prepare_network_sites( bool $is_network ) : array {
        if ( !$is_network || !is_multisite() ) {
            return [];
        }
        $sites = [];
        $all_sites = get_sites();
        foreach ( $all_sites as $site ) {
            $sites[] = [
                'blog_id' => $site->blog_id,
                'url'     => $site->siteurl,
                'name'    => $site->blogname,
            ];
        }
        return $sites;
    }

    /**
     * Format license status for display.
     *
     * @param object $license Freemius license object.
     * @return array Formatted status information.
     */
    private function format_license_status( object $license ) : array {
        $status_info = [
            'is_licensed' => 'Yes',
            'license_key' => 'Not available',
            'is_expired'  => 'N/A',
            'expires'     => 'N/A',
            'activations' => 'N/A',
        ];
        $status_info['license_key'] = $this->get_masked_license_key( $license );
        $status_info['is_expired'] = ( $license->is_expired() ? 'Yes' : 'No' );
        if ( $license->is_lifetime() ) {
            $status_info['expires'] = 'Never';
        } elseif ( isset( $license->expiration ) ) {
            $status_info['expires'] = $license->expiration;
        }
        if ( isset( $license->activated ) ) {
            if ( $license->is_unlimited() ) {
                $status_info['activations'] = $license->activated . '/∞';
            } elseif ( isset( $license->quota ) ) {
                $status_info['activations'] = $license->activated . '/' . $license->quota;
            } else {
                $status_info['activations'] = $license->activated;
            }
        }
        return $status_info;
    }

    /**
     * Get masked license key for CLI display.
     *
     * @param object $license Freemius license object.
     * @return string Masked license key.
     */
    private function get_masked_license_key( object $license ) : string {
        if ( method_exists( $license, 'get_masked_secret_key' ) ) {
            return $license->get_masked_secret_key();
        }
        return 'Not available';
    }

    /**
     * Get license object using the first available Freemius method.
     *
     * @return object|null License object or null if not available.
     */
    private function get_license_object() : ?object {
        $fs = $this->sdk;
        $methods = ['_get_license', 'get_license', 'get_user_license'];
        foreach ( $methods as $method ) {
            if ( method_exists( $fs, $method ) ) {
                $result = $fs->{$method}();
                if ( $result ) {
                    return $result;
                }
            }
        }
        return null;
    }

}