<?php

namespace WTeam_Executor;

use WP_Error;

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

/**
 * Read-only wp-config.php debug profile reader used by the WordPress.org build.
 */
class WTeam_Executor_Config_Reader {

    /** @return array<string,mixed>|WP_Error */
    public function get_debug_state() {
        $path = $this->resolve_config_path();
        if ( is_wp_error( $path ) ) {
            return $path;
        }
        $content = @file_get_contents( $path );
        if ( ! is_string( $content ) ) {
            return new WP_Error( 'wteam_executor_config_read_failed', __( 'Executor could not read wp-config.php.', 'wteam-executor' ) );
        }
        $state = [];
        foreach ( WTeam_Executor_Config_Policy::readable_constants() as $constant ) {
            $state[ $constant ] = $this->read_boolean_define( $content, $constant );
        }
        return [
            'path'      => $this->display_path( $path ),
            'constants' => $state,
        ];
    }

    /** @return string|WP_Error */
    private function resolve_config_path() {
        $candidates = [ ABSPATH . 'wp-config.php', dirname( untrailingslashit( ABSPATH ) ) . '/wp-config.php' ];
        foreach ( $candidates as $candidate ) {
            $real = realpath( $candidate );
            if ( $real && is_file( $real ) && is_readable( $real ) ) {
                return wp_normalize_path( $real );
            }
        }
        return new WP_Error( 'wteam_executor_config_not_found', __( 'Executor could not locate a readable wp-config.php.', 'wteam-executor' ) );
    }

    /** @return bool|null */
    private function read_boolean_define( $content, $constant ) {
        $pattern = '/define\s*\(\s*([\'\"])' . preg_quote( $constant, '/' ) . '\1\s*,\s*(true|false|1|0)\s*\)\s*;/i';
        if ( ! preg_match( $pattern, (string) $content, $match ) ) {
            return null;
        }
        return in_array( strtolower( $match[2] ), [ 'true', '1' ], true );
    }

    /** @return string */
    private function display_path( $path ) {
        $path = wp_normalize_path( $path );
        $root_real = realpath( ABSPATH );
        $root = $root_real ? trailingslashit( wp_normalize_path( $root_real ) ) : '';
        return $root && 0 === strpos( $path, $root ) ? ltrim( substr( $path, strlen( $root ) ), '/' ) : 'wp-config.php';
    }
}