<?php
namespace Appsero\Helper\Edd;

use WP_Error;
use EDD_SL_License;
use WP_REST_Response;

/**
 * Licenses
 */
class Licenses {

    /**
     * Get a collection of licenses.
     *
     * @param WP_REST_Request $request Full details about the request.
     *
     * @return WP_Error|WP_REST_Response
     */
    public function get_items( $request ) {
        $download_id = $request->get_param( 'product_id' );

        if ( ! class_exists( 'EDD_SL_License' ) ) {
            return rest_ensure_response( [] );
        }

        $per_page     = $request->get_param( 'per_page' );
        $current_page = $request->get_param( 'page' );
        $offset       = ( $current_page - 1 ) * $per_page;

        // `edd_software_licensing()->licenses_db->get_licenses()` not fulfill my need
        global $wpdb;
        $query       = "SELECT SQL_CALC_FOUND_ROWS id FROM {$wpdb->prefix}edd_licenses WHERE download_id = {$download_id} ";
        $query      .= " ORDER BY id ASC LIMIT {$per_page} OFFSET {$offset}";
        $results     = $wpdb->get_col( $query, 0 );
        $total_items = $wpdb->get_var( 'SELECT FOUND_ROWS()' );

        $licenses = [];

        foreach( $results as $id ) {
            $licenses[] = $this->get_license_data( $id );
        }

        $response = rest_ensure_response( $licenses );

        $max_pages = ceil( $total_items / $per_page );
        $response->header( 'X-WP-Total', (int) $total_items );
        $response->header( 'X-WP-TotalPages', (int) $max_pages );

        return $response;
    }

    /**
     * get active sites
     *
     * @param int $id
     *
     * @return array
     */
    protected function get_activations( $id ) {
        $args  = [
            'number'     => -1,
            'license_id' => $id
        ];

        $sites = edd_software_licensing()->activations_db->get_activations( $args );

        if( empty( $sites ) || ! is_array( $sites ) ) {
            return [];
        }

        foreach ( $sites as $site ) {
            $domains[] = [
                'site_url'  => untrailingslashit( $site->site_name ),
                'is_active' => !! $site->activated,
                'is_local'  => !! $site->is_local,
            ];
        }

        return $domains;
    }

    /**
     * Get single license data
     *
     * @return array
     */
    protected function get_license_data( $id ) {
        $license = new EDD_SL_License( $id );
        $status     = ( 'active' == $license->status || 'inactive' == $license->status ) ? 1 : 2;
        $expiration = $license->expiration ? date( 'Y-m-d H:i:s', (int) $license->expiration ) : null;
        // `$license->sites` not fulfill my need
        $activations = $this->get_activations( $license->id );

        return [
            'key'               => $license->license_key,
            'status'            => $status,
            'created_at'        => $license->date_created,
            'expire_date'       => $expiration,
            'activation_limit'  => $license->activation_limit ?: null,
            'activations'       => $activations,
            'variation_source'  => (int) $license->price_id ?: null,
            'active_sites'      => (int) $license->activation_count,
        ];
    }

    /**
     * Change status of a license
     *
     * @param WP_REST_Request $request Full details about the request.
     *
     * @return WP_Error|WP_REST_Response
     */
    public function change_status( $request ) {
        $download_id = $request->get_param( 'product_id' );
        $license_key = $request->get_param( 'license_key' );

        $license = edd_software_licensing()->get_license( $license_key, true );

        if ( $download_id !== $license->download_id ) {
            return new WP_Error( 'invalid-license', 'License not found.', array( 'status' => 404 ) );
        }

        $status = $request->get_param( 'status' );
        $status = ( 1 === $status || 0 === $status ) ? 'active' : 'disabled';

        $updated = $license->update( [ 'status' => $status ] );

        if ( $updated ) {
            return new WP_REST_Response( [
                'success' => true,
                'message' => 'License updated successfully.',
            ] );
        }

        return new WP_Error( 'unknown-error', 'EDD could not update license.', array( 'status' => 400 ) );
    }

}