<?php
/**
 * WP-CLI commands class.
 *
 * @package SpeedNest
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

if ( ! defined( 'WP_CLI' ) || ! WP_CLI ) {
    return;
}

/**
 * Class WPSCO_CLI
 *
 * Provides WP-CLI commands for SpeedNest.
 */
class WPSCO_CLI {

    /**
     * Clear caches.
     *
     * ## OPTIONS
     *
     * [--all]
     * : Clear all caches including CSS, JS, HTML, object, transients, and OPcache.
     *
     * [--css]
     * : Clear generated CSS cache.
     *
     * [--js]
     * : Clear generated JavaScript cache.
     *
     * [--html]
     * : Clear page / HTML cache.
     *
     * ## EXAMPLES
     *
     *     wp wpso cache clear
     *     wp wpso cache clear --all
     *     wp wpso cache clear --css
     *     wp wpso cache clear --js
     *     wp wpso cache clear --html
     *
     * @param array $args Positional arguments.
     * @param array $assoc_args Associative flags.
     */
    public function cache( $args, $assoc_args ) {
        $action = isset( $args[0] ) ? $args[0] : 'clear';

        if ( 'clear' === $action ) {
            $purger = new WPSCO_Cache_Purger();

            if ( isset( $assoc_args['all'] ) ) {
                WP_CLI::log( 'Executing full nuclear cache purge...' );
                $results = $purger->purge_everything();
                $this->display_purge_table( $results );
                WP_CLI::success( 'Nuclear cache purge completed.' );
                return;
            }

            if ( isset( $assoc_args['css'] ) ) {
                $res = $purger->purge_css_cache();
                WP_CLI::success( sprintf( 'CSS Cache: %s (%s)', $res['status'], $res['message'] ) );
                return;
            }

            if ( isset( $assoc_args['js'] ) ) {
                $res = $purger->purge_js_cache();
                WP_CLI::success( sprintf( 'JS Cache: %s (%s)', $res['status'], $res['message'] ) );
                return;
            }

            if ( isset( $assoc_args['html'] ) ) {
                $res = $purger->purge_html_cache();
                WP_CLI::success( sprintf( 'HTML Page Cache: %s (%s)', $res['status'], $res['message'] ) );
                return;
            }

            // Default clear action: purge all accessible layers.
            WP_CLI::log( 'Purging all accessible cache layers...' );
            $results = $purger->purge_all();
            $this->display_purge_table( $results );
            WP_CLI::success( 'Cache purge complete.' );
            return;
        }

        if ( 'status' === $action ) {
            $this->status( $args, $assoc_args );
            return;
        }

        WP_CLI::error( sprintf( 'Unknown cache action "%s". Use: wp wpso cache clear [--all|--css|--js|--html] or wp wpso cache status', $action ) );
    }

    /**
     * Display cache status.
     *
     * ## EXAMPLES
     *
     *     wp wpso cache status
     *
     * @param array $args Positional arguments.
     * @param array $assoc_args Associative flags.
     */
    public function status( $args = array(), $assoc_args = array() ) {
        $cache_dir  = function_exists( 'wpsco_get_cache_dir' ) ? wpsco_get_cache_dir() : ( defined( 'WPSCO_CACHE_DIR' ) ? WPSCO_CACHE_DIR : '' );
        $dir_exists = is_dir( $cache_dir );
        $total_size = $dir_exists ? wpsco_get_dir_size( $cache_dir ) : 0;

        $css_size  = is_dir( $cache_dir . 'css/' ) ? wpsco_get_dir_size( $cache_dir . 'css/' ) : 0;
        $js_size   = is_dir( $cache_dir . 'js/' ) ? wpsco_get_dir_size( $cache_dir . 'js/' ) : 0;
        $html_size = is_dir( $cache_dir . 'html/' ) ? wpsco_get_dir_size( $cache_dir . 'html/' ) : 0;

        $table_data = array(
            array( 'Layer', 'Status', 'Size' ),
            array( 'Cache Directory', $dir_exists ? 'Writable' : 'Missing', wpsco_format_size( $total_size ) ),
            array( 'CSS Cache', wpsco_get_setting( 'css_minify' ) ? 'Enabled' : 'Disabled', wpsco_format_size( $css_size ) ),
            array( 'JS Cache', wpsco_get_setting( 'js_minify' ) ? 'Enabled' : 'Disabled', wpsco_format_size( $js_size ) ),
            array( 'HTML Page Cache', wpsco_get_setting( 'page_cache_enabled' ) ? 'Enabled' : 'Disabled', wpsco_format_size( $html_size ) ),
            array( 'Object Cache', wp_using_ext_object_cache() ? 'Persistent External' : 'Internal', 'N/A' ),
            array( 'OPcache', function_exists( 'opcache_reset' ) ? 'Active' : 'Disabled/Restricted', 'N/A' ),
            array( 'Cache Version', wpsco_get_cache_version(), 'N/A' ),
        );

        WP_CLI\Utils\format_items( 'table', array_map( function( $row ) {
            return array( 'Component' => $row[0], 'Status' => $row[1], 'Details' => $row[2] );
        }, array_slice( $table_data, 1 ) ), array( 'Component', 'Status', 'Details' ) );
    }

    /**
     * Run diagnostics.
     *
     * ## EXAMPLES
     *
     *     wp wpso diagnostics
     *
     * @param array $args Positional arguments.
     * @param array $assoc_args Associative flags.
     */
    public function diagnostics( $args = array(), $assoc_args = array() ) {
        WP_CLI::log( 'Running performance diagnostics...' );
        $diag = WPSCO_Diagnostics::run_local_diagnostics();

        WP_CLI::log( 'Server Software: ' . $diag['server']['server_software'] );
        WP_CLI::log( 'PHP Version:     ' . $diag['server']['php_version'] );
        WP_CLI::log( 'Memory Limit:    ' . $diag['server']['memory_limit'] );
        WP_CLI::log( 'Compression:     ' . ( $diag['compression']['status'] ? 'Active (' . $diag['compression']['active_compression'] . ')' : 'Inactive' ) );
        WP_CLI::log( 'OPcache:         ' . ( $diag['opcache']['enabled'] ? 'Enabled (Hit Rate: ' . $diag['opcache']['hit_rate'] . ')' : 'Disabled' ) );
        WP_CLI::log( 'Object Cache:    ' . $diag['object_cache']['engine'] );

        if ( 'success' === $diag['homepage']['status'] ) {
            WP_CLI::log( sprintf( 'Homepage TTFB:   %d ms', $diag['homepage']['ttfb_ms'] ) );
            WP_CLI::log( sprintf( 'HTML Size:       %s KB', $diag['homepage']['html_size_kb'] ) );
            WP_CLI::log( sprintf( 'Stylesheets:     %d', $diag['homepage']['css_count'] ) );
            WP_CLI::log( sprintf( 'Scripts:         %d', $diag['homepage']['js_count'] ) );
            WP_CLI::log( sprintf( 'Images:          %d (Lazy: %d, Missing Dims: %d)', $diag['homepage']['img_count'], $diag['homepage']['lazy_img_count'], $diag['homepage']['missing_dims'] ) );
        }

        WP_CLI::success( 'Diagnostics finished.' );
    }

    /**
     * Run one-click safe optimization.
     *
     * ## EXAMPLES
     *
     *     wp wpso optimize
     *
     * @param array $args Positional arguments.
     * @param array $assoc_args Associative flags.
     */
    public function optimize( $args = array(), $assoc_args = array() ) {
        WP_CLI::log( 'Applying One-Click Safe Optimization preset...' );
        WPSCO_Settings::apply_one_click_safe_optimization();
        WP_CLI::success( 'Safe performance optimization applied. Caches purged.' );
    }

    /**
     * Helper to render purge result table.
     *
     * @param array $results Purge results.
     */
    private function display_purge_table( $results ) {
        $rows = array();
        foreach ( $results as $key => $res ) {
            $rows[] = array(
                'Cache Layer' => $res['name'] ?? $key,
                'Status'      => $res['status'] ?? 'unknown',
                'Message'     => $res['message'] ?? '',
            );
        }
        WP_CLI\Utils\format_items( 'table', $rows, array( 'Cache Layer', 'Status', 'Message' ) );
    }
}

WP_CLI::add_command( 'wpso', 'WPSCO_CLI' );