<?php

/**
 * SitiWebUpdater2
 *
 * Updates plugins via the Siti Plugin Repo API instead of GitHub
 * Fully self-contained with built-in license management
 */
class SitiWebUpdater2 {

    private $file;
    private $plugin;
    private $basename;
    private $active;
    private $owner;
    private $repository;
    private $license_key;
    private $api_base_url = 'https://plugins.robert.ooo';
    private $plugin_response;
    private $option_prefix;

    public function __construct( $file ) {
        $this->file = $file;
        $this->option_prefix = 'siti_updater_' . sanitize_key( dirname( plugin_basename( $this->file ) ) ) . '_';
        $this->set_plugin_properties();

        add_action( 'admin_init', array( $this, 'set_plugin_properties' ) );
        add_action( 'admin_notices', array( $this, 'admin_notices' ) );
        add_action( 'siti_updater_daily_check_' . $this->option_prefix, array( $this, 'daily_license_check' ) );

        if ( ! wp_next_scheduled( 'siti_updater_daily_check_' . $this->option_prefix ) ) {
            wp_schedule_event( time(), 'daily', 'siti_updater_daily_check_' . $this->option_prefix );
        }

        return $this;
    }

    public function initialize() {
        add_filter( 'pre_set_site_transient_update_plugins', array( $this, 'check_for_updates' ) );
        add_filter( 'plugins_api', array( $this, 'plugin_info' ), 10, 3 );
        add_action( 'admin_menu', array( $this, 'add_settings_page' ) );
    }

    public function set_plugin_properties() {
        if ( ! function_exists( 'get_plugin_data' ) ) {
            require_once ABSPATH . 'wp-admin/includes/plugin.php';
        }

        $this->plugin = get_plugin_data( $this->file, false, false );
        $this->basename = plugin_basename( $this->file );
        $this->active = is_plugin_active( $this->basename );
    }

    public function set_owner( $owner ) {
        $this->owner = $owner;
    }

    public function set_repository( $repository ) {
        $this->repository = $repository;
    }

    public function set_license_key( $key ) {
        $this->license_key = $key;
        update_option( $this->option_prefix . 'license_key', $key );
    }

    public function get_license_key() {
        if ( null === $this->license_key ) {
            $this->license_key = get_option( $this->option_prefix . 'license_key', '' );
        }
        return $this->license_key;
    }

    public function set_api_base_url( $api_base_url ) {
        $this->api_base_url = rtrim( (string) $api_base_url, '/' );
    }

    private function get_plugin_info() {
        if ( is_null( $this->plugin_response ) ) {
            $request_uri = sprintf( '%s/api/plugins/%s/%s', $this->api_base_url, $this->owner, $this->repository );

            $response = wp_remote_get( $request_uri, array( 'timeout' => 15 ) );

            if ( is_wp_error( $response ) ) {
                $this->plugin_response = false;
                return;
            }

            $code = wp_remote_retrieve_response_code( $response );
            if ( 200 !== $code ) {
                $this->plugin_response = false;
                return;
            }

            $body = json_decode( wp_remote_retrieve_body( $response ), true );
            $this->plugin_response = $body;
        }
    }

    public function check_for_updates( $transient ) {
        if ( empty( $transient->checked ) ) {
            return $transient;
        }

        $this->get_plugin_info();

        if ( false === $this->plugin_response || empty( $this->plugin_response['version'] ) ) {
            return $transient;
        }

        $remote_version = $this->plugin_response['version'];
        $current_version = $this->plugin['Version'];

        if ( version_compare( $remote_version, $current_version, '>' ) ) {
            $download_url = $this->get_download_url( 'latest' );

            if ( ! is_wp_error( $download_url ) ) {
                $transient->response[ $this->basename ] = (object) array(
                    'slug'        => dirname( $this->basename ),
                    'new_version' => $remote_version,
                    'package'     => $download_url,
                    'tested'      => get_bloginfo( 'version' ),
                    'url'         => $this->plugin_response['homepage'] ?? '',
                );
            }
        }

        return $transient;
    }

    public function plugin_info( $result, $action, $args ) {
        if ( 'plugin_information' !== $action || $args->slug !== dirname( $this->basename ) ) {
            return $result;
        }

        $this->get_plugin_info();

        if ( false === $this->plugin_response ) {
            return $result;
        }

        return (object) array(
            'name'          => $this->plugin_response['name'] ?? $this->plugin['Name'],
            'slug'          => $args->slug,
            'version'       => $this->plugin_response['version'],
            'author'        => $this->plugin_response['author'] ?? $this->plugin['Author'],
            'author_profile' => $this->plugin_response['author_url'] ?? $this->plugin['AuthorURI'],
            'homepage'      => $this->plugin_response['homepage'] ?? '',
            'requires'      => $this->plugin_response['requires'] ?? '',
            'tested'        => $this->plugin_response['tested'] ?? get_bloginfo( 'version' ),
            'downloaded'    => $this->plugin_response['downloads'] ?? 0,
            'last_updated'  => $this->plugin_response['last_updated'] ?? '',
            'sections'      => array(
                'description' => $this->plugin_response['description'] ?? $this->plugin['Description'],
                'changelog'   => $this->plugin_response['changelog'] ?? '',
            ),
            'download_link' => $this->get_download_url( 'latest' ),
        );
    }

    private function get_download_url( $version = 'latest' ) {
        $license_key = $this->get_license_key();
        if ( empty( $license_key ) ) {
            return new WP_Error( 'no_license', 'Geen licentie ingesteld' );
        }

        $hostname = parse_url( home_url(), PHP_URL_HOST );
        return $this->api_base_url . '/api/licenses/download?key=' . urlencode( $license_key ) . '&hostname=' . urlencode( $hostname ) . '&version=' . urlencode( $version );
    }

    public function verify_license() {
        $license_key = $this->get_license_key();
        if ( empty( $license_key ) ) {
            return new WP_Error( 'missing_license', 'Geen licentiecode ingesteld.' );
        }

        $hostname = parse_url( home_url(), PHP_URL_HOST );
        $response = wp_remote_post( $this->api_base_url . '/api/licenses/verify', array(
            'headers' => array(
                'Content-Type' => 'application/json',
            ),
            'body' => wp_json_encode( array(
                'key'      => $license_key,
                'hostname' => $hostname,
            ) ),
            'timeout' => 15,
        ) );

        if ( is_wp_error( $response ) ) {
            return $response;
        }

        $code = wp_remote_retrieve_response_code( $response );
        $body = json_decode( wp_remote_retrieve_body( $response ), true );

        if ( 200 !== $code ) {
            $error_message = isset( $body['error'] ) ? $body['error'] : 'Licentie verificatie mislukt.';
            return new WP_Error( 'verification_failed', $error_message );
        }

        if ( empty( $body['valid'] ) ) {
            return new WP_Error( 'invalid_license', 'Licentie is ongeldig.' );
        }

        // Store license data
        update_option( $this->option_prefix . 'license_data', $body['license'] );
        update_option( $this->option_prefix . 'last_check', current_time( 'mysql' ) );

        return $body;
    }

    public function is_license_valid() {
        $data = get_option( $this->option_prefix . 'license_data', array() );
        return ! empty( $data ) && isset( $data['key'] );
    }

    public function admin_notices() {
        if ( ! current_user_can( 'manage_options' ) ) {
            return;
        }

        if ( ! $this->is_license_valid() ) {
            $settings_url = admin_url( 'options-general.php?page=siti-updater-' . sanitize_title( $this->plugin['Name'] ) );
            echo '<div class="notice notice-error"><p>';
            printf(
                esc_html__( '%s: Licentie ongeldig of niet ingesteld. Ga naar %s om je licentie in te voeren.', 'siti-updater' ),
                esc_html( $this->plugin['Name'] ),
                '<a href="' . esc_url( $settings_url ) . '">' . esc_html__( 'instellingen', 'siti-updater' ) . '</a>'
            );
            echo '</p></div>';
        }
    }

    public function daily_license_check() {
        $result = $this->verify_license();
        if ( is_wp_error( $result ) ) {
            error_log( $this->plugin['Name'] . ' License check failed: ' . $result->get_error_message() );
        }
    }

    public function add_settings_page() {
        add_options_page(
            sprintf( __( '%s Licentie', 'siti-updater' ), $this->plugin['Name'] ),
            sprintf( __( '%s Licentie', 'siti-updater' ), $this->plugin['Name'] ),
            'manage_options',
            'siti-updater-' . sanitize_title( $this->plugin['Name'] ),
            array( $this, 'render_settings_page' )
        );
    }

    public function render_settings_page() {
        if ( ! current_user_can( 'manage_options' ) ) {
            return;
        }

        if ( isset( $_POST['siti_updater_license_key'] ) && wp_verify_nonce( $_POST['_wpnonce'], 'siti_updater_save' ) ) {
            $this->set_license_key( sanitize_text_field( $_POST['siti_updater_license_key'] ) );
            $result = $this->verify_license();
            if ( is_wp_error( $result ) ) {
                add_settings_error( 'siti_updater', 'license_error', $result->get_error_message() );
            } else {
                add_settings_error( 'siti_updater', 'license_success', __( 'Licentie succesvol opgeslagen en geverifieerd.', 'siti-updater' ), 'updated' );
            }
        }

        ?>
        <div class="wrap">
            <h1><?php printf( esc_html__( '%s Licentie Instellingen', 'siti-updater' ), $this->plugin['Name'] ); ?></h1>
            <p class="description">
                <?php printf( esc_html__( 'Voer je licentiecode in voor %s om updates te ontvangen.', 'siti-updater' ), $this->plugin['Name'] ); ?>
            </p>

            <?php settings_errors( 'siti_updater' ); ?>

            <form method="post" action="">
                <?php wp_nonce_field( 'siti_updater_save' ); ?>
                <table class="form-table">
                    <tr>
                        <th scope="row"><?php esc_html_e( 'Licentiecode', 'siti-updater' ); ?></th>
                        <td>
                            <input type="text" name="siti_updater_license_key" value="<?php echo esc_attr( $this->get_license_key() ); ?>" class="regular-text" />
                            <p class="description"><?php esc_html_e( 'Verkrijg je licentiecode van plugins.robert.ooo', 'siti-updater' ); ?></p>
                        </td>
                    </tr>
                </table>
                <p class="submit">
                    <input type="submit" name="submit" class="button button-primary" value="<?php esc_attr_e( 'Licentie opslaan', 'siti-updater' ); ?>" />
                </p>
            </form>
        </div>
        <?php
    }
}