<?php
namespace NyxonnBuilder;

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

/** Authoritative normalized settings API for frontend performance behavior. */
final class Performance_Settings {
    const OPTION_KEY = 'nyxonn_builder_performance_settings';

    public static function init() {
        add_action( 'admin_post_nyxonn_builder_save_performance', [ __CLASS__, 'handle_save' ] );
        add_action( 'admin_post_nyxonn_builder_reset_performance', [ __CLASS__, 'handle_reset' ] );
        self::maybe_disable_emojis();
    }

    public static function get_defaults() {
        return [
            'dynamic_module_assets'  => true,
            'dynamic_icons'          => true,
            'inline_dynamic_styles'  => true,
            'critical_css'           => false,
            'critical_threshold'     => 'medium',
            'dynamic_javascript'     => true,
            'disable_emojis'         => false,
            'optimize_google_fonts'  => true,
            'disable_google_fonts'   => false,
        ];
    }

    public static function google_fonts_disabled() {
        return ! empty( self::get_settings()['disable_google_fonts'] );
    }

    public static function get_settings() {
        $settings = self::sanitize_import_settings( Prefix_Migration::get_option( self::OPTION_KEY, [] ) );
        /** Future recovery systems may override effective values without changing saved preferences. */
        $effective = apply_filters( 'nyxonn_fx_effective_performance_settings', $settings );
        return self::sanitize_import_settings( is_array( $effective ) ? $effective : $settings );
    }

    public static function is_enabled( $key ) {
        $settings = self::get_settings();
        return ! empty( $settings[ sanitize_key( $key ) ] );
    }

    public static function get_critical_threshold_pixels() {
        $settings = self::get_settings();
        $thresholds = [ 'low' => 600, 'medium' => 900, 'high' => 1200 ];
        return $thresholds[ $settings['critical_threshold'] ] ?? $thresholds['medium'];
    }

    public static function sanitize_import_settings( $settings ) {
        $settings = is_array( $settings ) ? $settings : [];
        $clean = self::get_defaults();
        foreach ( [ 'dynamic_module_assets', 'dynamic_icons', 'inline_dynamic_styles', 'critical_css', 'dynamic_javascript', 'disable_emojis', 'optimize_google_fonts', 'disable_google_fonts' ] as $key ) {
            if ( array_key_exists( $key, $settings ) ) {
                $clean[ $key ] = (bool) $settings[ $key ];
            }
        }
        $threshold = sanitize_key( $settings['critical_threshold'] ?? $clean['critical_threshold'] );
        $clean['critical_threshold'] = in_array( $threshold, [ 'low', 'medium', 'high' ], true ) ? $threshold : 'medium';
        return $clean;
    }

    public static function handle_save() {
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_die( esc_html__( 'You do not have permission to update performance settings.', 'nyxonn-builder' ), '', [ 'response' => 403 ] );
        }
        check_admin_referer( 'nyxonn_builder_save_performance' );
        $submitted = [];
        foreach ( array_keys( self::get_defaults() ) as $key ) {
            if ( 'critical_threshold' === $key ) {
                $submitted[ $key ] = isset( $_POST[ $key ] ) ? sanitize_key( wp_unslash( $_POST[ $key ] ) ) : 'medium';
            } else {
                $submitted[ $key ] = isset( $_POST[ $key ] );
            }
        }
        update_option( self::OPTION_KEY, self::sanitize_import_settings( $submitted ), false );
        wp_safe_redirect( add_query_arg( 'nyxonn_builder_notice', 'saved', admin_url( 'admin.php?page=nyxonn-builder-performance' ) ) );
        exit;
    }

    public static function handle_reset() {
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_die( esc_html__( 'You do not have permission to reset performance settings.', 'nyxonn-builder' ), '', [ 'response' => 403 ] );
        }
        check_admin_referer( 'nyxonn_builder_reset_performance' );
        update_option( self::OPTION_KEY, self::get_defaults(), false );
        wp_safe_redirect( add_query_arg( 'nyxonn_builder_notice', 'reset', admin_url( 'admin.php?page=nyxonn-builder-performance' ) ) );
        exit;
    }

    private static function maybe_disable_emojis() {
        if ( is_admin() || ! self::is_enabled( 'disable_emojis' ) ) {
            return;
        }
        remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
        remove_action( 'wp_print_styles', 'print_emoji_styles' );
        remove_action( 'wp_enqueue_scripts', 'wp_enqueue_emoji_styles' );
    }
}