<?php
namespace QWSpeedCache\Tools;

defined( 'ABSPATH' ) || exit;

/**
 * One-click presets and named profile helpers.
 */
class Presets {

	const PROFILES_OPTION = 'qwsc_profiles';

	/**
	 * Built-in preset definitions.
	 *
	 * The settings map is intentionally partial: settings not mentioned by a preset
	 * keep their current value. Pro-only keys are applied only when the Pro add-on
	 * reports itself active; Free users still receive the safe Free portion.
	 *
	 * @return array<string,array>
	 */
	public static function builtins() {
		return array(
			'safe' => array(
				'label'       => __( 'Safe Start', 'qw-optimize' ),
				'tagline'     => __( 'Best first click for a new site', 'qw-optimize' ),
				'description' => __( 'Turns on the safest high-value caching and front-end optimizations without aggressive CSS/JS behavior.', 'qw-optimize' ),
				'risk'        => 'safe',
				'badge'       => __( 'Beginner', 'qw-optimize' ),
				'pro'         => false,
				'features'    => array( __( 'Page + browser cache', 'qw-optimize' ), __( 'Compression', 'qw-optimize' ), __( 'HTML/CSS/JS minify', 'qw-optimize' ), __( 'Lazy-load + image dimensions', 'qw-optimize' ) ),
				'settings'    => array(
					'page_cache_enabled'   => 1,
					'cache_enabled'        => 1,
					'cache_mobile'         => 1,
					'browser_cache_enabled'=> 1,
					'gzip_enabled'         => 1,
					'minify_html'          => 1,
					'minify_css'           => 1,
					'minify_js'            => 1,
					'combine_css'          => 0,
					'combine_js'           => 0,
					'defer_js'             => 0,
					'delay_js'             => 0,
					'js_safe_mode'         => 1,
					'builder_compat'       => 1,
					'lazyload_images'      => 1,
					'lazyload_iframes'     => 1,
					'image_dimensions'     => 1,
					'preload_critical_images' => 1,
					'remove_unused_css'    => 0,
					'critical_css_enabled' => 0,
					'test_mode'            => 0,
				),
			),
			'balanced' => array(
				'label'       => __( 'Balanced', 'qw-optimize' ),
				'tagline'     => __( 'Recommended for most WordPress sites', 'qw-optimize' ),
				'description' => __( 'Adds safe JavaScript defer, hover prefetch and sensible cleanup while keeping compatibility safeguards enabled.', 'qw-optimize' ),
				'risk'        => 'balanced',
				'badge'       => __( 'Recommended', 'qw-optimize' ),
				'pro'         => false,
				'features'    => array( __( 'Everything in Safe Start', 'qw-optimize' ), __( 'Defer JavaScript', 'qw-optimize' ), __( 'Hover prefetch', 'qw-optimize' ), __( 'Heartbeat optimization', 'qw-optimize' ) ),
				'settings'    => array(
					'page_cache_enabled'   => 1,
					'cache_enabled'        => 1,
					'cache_mobile'         => 1,
					'browser_cache_enabled'=> 1,
					'gzip_enabled'         => 1,
					'lazyload_images'      => 1,
					'lazyload_iframes'     => 1,
					'image_dimensions'     => 1,
					'preload_critical_images' => 1,
					'critical_images_max'  => 1,
					'browser_cache_font_cors' => 1,
					'google_fonts_optimize' => 1,
					'font_display_sitewide' => 1,
					'font_display'          => 'swap',
					'defer_js'             => 1,
					'js_safe_mode'         => 1,
					'builder_compat'       => 1,
					'minify_html'          => 1,
					'minify_css'           => 1,
					'minify_js'            => 1,
					'combine_js'           => 0,
					'combine_css'          => 0,
					'hover_prefetch_enabled' => 1,
					'heartbeat_control'    => 1,
					'heartbeat_disable_front' => 1,
					'hosting_purge_auto'   => 1,
					'delay_js'             => 0,
					'remove_unused_css'    => 0,
					'critical_css_enabled' => 0,
					'test_mode'            => 0,
				),
			),
			'maximum' => array(
				'label'       => __( 'Maximum Performance', 'qw-optimize' ),
				'tagline'     => __( 'Push hard for the highest scores', 'qw-optimize' ),
				'description' => __( 'Enables aggressive caching and optimization. Pro adds Delay JS, Critical CSS, Remove Unused CSS, INP optimization and smart preload.', 'qw-optimize' ),
				'risk'        => 'aggressive',
				'badge'       => __( 'PRO-heavy', 'qw-optimize' ),
				'pro'         => true,
				'features'    => array( __( 'Aggressive minification', 'qw-optimize' ), __( 'Delay JS (Pro)', 'qw-optimize' ), __( 'Critical CSS + RUCSS (Pro)', 'qw-optimize' ), __( 'INP + smart preload (Pro)', 'qw-optimize' ) ),
				'settings'    => array(
					'page_cache_enabled' => 1, 'cache_enabled' => 1, 'cache_mobile' => 1,
					'browser_cache_enabled' => 1, 'gzip_enabled' => 1,
					'lazyload_images' => 1, 'lazyload_iframes' => 1, 'image_dimensions' => 1,
					'preload_critical_images' => 1, 'defer_js' => 1, 'js_safe_mode' => 1, 'builder_compat' => 1,
					'minify_html' => 1, 'minify_css' => 1, 'minify_js' => 1,
					'combine_css' => 0, 'combine_js' => 0, 'hover_prefetch_enabled' => 1,
					'heartbeat_control' => 1, 'heartbeat_disable_front' => 1,
					'delay_js' => 1, 'remove_unused_css' => 1, 'critical_css_enabled' => 1,
					'critical_css_auto' => 1, 'async_css_enabled' => 1, 'smart_third_party' => 1,
					'inp_optimizer_enabled' => 1, 'inp_scheduler_yield' => 1,
					'preload_links' => 1, 'preload_after_purge' => 1,
					'test_mode' => 0,
				),
			),
			'ecommerce' => array(
				'label'       => __( 'WooCommerce / Store', 'qw-optimize' ),
				'tagline'     => __( 'Performance without breaking carts or checkout', 'qw-optimize' ),
				'description' => __( 'Protects WooCommerce sessions, payment flows and builders while enabling safe caching, minification and store-specific optimizations.', 'qw-optimize' ),
				'risk'        => 'safe',
				'badge'       => __( 'Store Safe', 'qw-optimize' ),
				'pro'         => false,
				'features'    => array( __( 'Checkout/cart safeguards', 'qw-optimize' ), __( 'Safe JS mode', 'qw-optimize' ), __( 'Empty-cart caching', 'qw-optimize' ), __( 'WooCommerce asset cleanup', 'qw-optimize' ) ),
				'settings'    => array(
					'page_cache_enabled' => 1, 'cache_enabled' => 1, 'cache_mobile' => 1, 'cache_logged_in' => 0,
					'browser_cache_enabled' => 1, 'gzip_enabled' => 1,
					'lazyload_images' => 1, 'lazyload_iframes' => 1, 'image_dimensions' => 1,
					'defer_js' => 1, 'delay_js' => 0, 'js_safe_mode' => 1, 'builder_compat' => 1,
					'minify_html' => 1, 'minify_css' => 1, 'minify_js' => 1,
					'combine_js' => 0, 'combine_css' => 0, 'remove_unused_css' => 0, 'critical_css_enabled' => 0,
					'woo_disable_cart_fragments' => 1, 'woo_dequeue_outside_shop' => 1,
					'woo_cache_empty_cart' => 1, 'woo_disable_password_strength' => 1,
					'woo_disable_scripts_outside_checkout' => 1, 'hosting_purge_auto' => 1,
					'test_mode' => 0,
				),
			),
			'builder' => array(
				'label'       => __( 'Elementor / Builder Safe', 'qw-optimize' ),
				'tagline'     => __( 'Compatibility-first for visual builders', 'qw-optimize' ),
				'description' => __( 'Uses caching, minification and media optimization while avoiding aggressive CSS/JS transformations that commonly break builder sites.', 'qw-optimize' ),
				'risk'        => 'safe',
				'badge'       => __( 'Builder Safe', 'qw-optimize' ),
				'pro'         => false,
				'features'    => array( __( 'Builder compatibility', 'qw-optimize' ), __( 'JS Safe Mode', 'qw-optimize' ), __( 'No combine', 'qw-optimize' ), __( 'Conservative defer', 'qw-optimize' ) ),
				'settings'    => array(
					'page_cache_enabled' => 1, 'cache_enabled' => 1, 'cache_mobile' => 1,
					'browser_cache_enabled' => 1, 'gzip_enabled' => 1,
					'lazyload_images' => 1, 'lazyload_iframes' => 1, 'image_dimensions' => 1,
					'minify_html' => 1, 'minify_css' => 1, 'minify_js' => 1,
					'defer_js' => 1, 'delay_js' => 0, 'combine_css' => 0, 'combine_js' => 0,
					'remove_unused_css' => 0, 'critical_css_enabled' => 0,
					'js_safe_mode' => 1, 'builder_compat' => 1, 'test_mode' => 0,
				),
			),
			'developer' => array(
				'label'       => __( 'Developer Mode', 'qw-optimize' ),
				'tagline'     => __( 'Predictable behavior while actively building', 'qw-optimize' ),
				'description' => __( 'Keeps risky transformations off, enables safe testing behavior and makes cache changes easier to reason about during development.', 'qw-optimize' ),
				'risk'        => 'safe',
				'badge'       => __( 'Development', 'qw-optimize' ),
				'pro'         => false,
				'features'    => array( __( 'Test mode', 'qw-optimize' ), __( 'No CSS/JS combine', 'qw-optimize' ), __( 'No Delay JS/RUCSS', 'qw-optimize' ), __( 'Builder + JS safeguards', 'qw-optimize' ) ),
				'settings'    => array(
					'page_cache_enabled' => 1, 'cache_enabled' => 1, 'cache_logged_in' => 0,
					'browser_cache_enabled' => 0, 'minify_html' => 0, 'minify_css' => 0, 'minify_js' => 0,
					'combine_css' => 0, 'combine_js' => 0, 'defer_js' => 0, 'delay_js' => 0,
					'remove_unused_css' => 0, 'critical_css_enabled' => 0,
					'js_safe_mode' => 1, 'builder_compat' => 1, 'test_mode' => 1,
				),
			),
			'cwv' => array(
				'label'       => __( 'Core Web Vitals', 'qw-optimize' ),
				'tagline'     => __( 'Target LCP, INP and rendering bottlenecks', 'qw-optimize' ),
				'description' => __( 'Focuses on above-the-fold rendering, JavaScript interaction cost, critical images and high-impact Core Web Vitals improvements.', 'qw-optimize' ),
				'risk'        => 'balanced',
				'badge'       => __( 'PRO-heavy', 'qw-optimize' ),
				'pro'         => true,
				'features'    => array( __( 'Critical image preload', 'qw-optimize' ), __( 'Delay JS (Pro)', 'qw-optimize' ), __( 'Critical CSS + RUCSS (Pro)', 'qw-optimize' ), __( 'INP optimizer (Pro)', 'qw-optimize' ) ),
				'settings'    => array(
					'page_cache_enabled' => 1, 'cache_enabled' => 1, 'browser_cache_enabled' => 1, 'gzip_enabled' => 1,
					'lazyload_images' => 1, 'lazyload_iframes' => 1, 'image_dimensions' => 1, 'preload_critical_images' => 1,
					'critical_images_max' => 1, 'browser_cache_font_cors' => 1,
					'google_fonts_optimize' => 1, 'font_display_sitewide' => 1, 'font_display' => 'swap',
					'defer_js' => 1, 'js_safe_mode' => 1, 'builder_compat' => 1,
					'minify_html' => 1, 'minify_css' => 1, 'minify_js' => 1, 'combine_css' => 0, 'combine_js' => 0,
					'hover_prefetch_enabled' => 1,
					'delay_js' => 1, 'remove_unused_css' => 1, 'critical_css_enabled' => 1, 'critical_css_auto' => 1,
					'inp_optimizer_enabled' => 1, 'inp_scheduler_yield' => 1, 'smart_third_party' => 1,
					'preload_links' => 1, 'preload_after_purge' => 1, 'test_mode' => 0,
				),
			),
		);
	}

	/**
	 * Overlay used for emergency recovery.
	 *
	 * @return array
	 */
	public static function safe_defaults_overlay() {
		return array(
			'page_cache_enabled'  => 1,
			'cache_enabled'       => 1,
			'minify_css'          => 0,
			'minify_js'           => 0,
			'minify_html'         => 0,
			'combine_css'         => 0,
			'combine_js'          => 0,
			'delay_js'            => 0,
			'defer_js'            => 0,
			'remove_unused_css'   => 0,
			'critical_css_auto'   => 0,
			'critical_css_enabled'=> 0,
			'test_mode'           => 0,
			'js_safe_mode'        => 1,
			'builder_compat'      => 1,
			'emergency_safe_mode' => 0,
		);
	}

	/** @return string[] */
	public static function list_presets() {
		return array_keys( self::builtins() );
	}

	/**
	 * Translate retired preset IDs so old links/suggestions keep working.
	 *
	 * @param string $preset_id Preset id.
	 * @return string
	 */
	public static function normalize_id( $preset_id ) {
		$aliases = array(
			'aggressive'    => 'maximum',
			'compatibility' => 'builder',
			'blog'          => 'balanced',
			'brochure'      => 'balanced',
		);
		return isset( $aliases[ $preset_id ] ) ? $aliases[ $preset_id ] : $preset_id;
	}

	/**
	 * Apply preset keys onto current stored settings.
	 *
	 * @param string $preset_id Preset id.
	 * @return bool
	 */
	public static function apply( $preset_id ) {
		$preset_id = self::normalize_id( sanitize_key( $preset_id ) );
		$builtins  = self::builtins();
		if ( ! isset( $builtins[ $preset_id ] ) ) {
			return false;
		}

		$current = get_option( 'qwsc_settings', array() );
		if ( ! is_array( $current ) ) {
			$current = array();
		}

		// Presets are useful without Pro. Only a separately installed and
		// active extension may provide premium-only preset behavior.
		$premium = array_fill_keys( \QWSpeedCache\Free\FeatureCatalog::keys(), true );
		$provided = array_fill_keys( \QWSpeedCache\Free\Extensions::available_pro_keys(), true );
		foreach ( $builtins[ $preset_id ]['settings'] as $k => $v ) {
			if ( isset( $premium[ $k ] ) && ! isset( $provided[ $k ] ) ) {
				continue;
			}
			$sanitized = \QWSpeedCache\Settings\Schema::sanitize_value( $k, $v );
			if ( null !== $sanitized ) {
				$current[ $k ] = $sanitized;
			}
		}
		update_option( 'qwsc_settings', $current );
		if ( class_exists( '\\QWSpeedCache\\Plugin' ) ) {
			\QWSpeedCache\Plugin::instance()->reload_settings();
		}
		if ( class_exists( '\\QWSpeedCache\\Stats\\Logger' ) ) {
			\QWSpeedCache\Stats\Logger::log( 'preset', 'Applied preset: ' . $preset_id );
		}
		return true;
	}

	/**
	 * Save named profile snapshot (non-secret exportable keys).
	 *
	 * @param string $name Name.
	 * @return bool
	 */
	public static function save_profile( $name ) {
		$name = sanitize_text_field( $name );
		if ( '' === $name || strlen( $name ) > 60 ) {
			return false;
		}
		$ie   = new ImportExport();
		$data = $ie->build_export_data();
		$profiles = get_option( self::PROFILES_OPTION, array() );
		if ( ! is_array( $profiles ) ) {
			$profiles = array();
		}
		$profiles[ $name ] = array(
			'time'     => time(),
			'settings' => isset( $data['settings'] ) ? $data['settings'] : array(),
		);
		if ( count( $profiles ) > 20 ) {
			$profiles = array_slice( $profiles, -20, null, true );
		}
		update_option( self::PROFILES_OPTION, $profiles, false );
		return true;
	}

	/**
	 * @param string $name Profile name.
	 * @return bool
	 */
	public static function load_profile( $name ) {
		$profiles = get_option( self::PROFILES_OPTION, array() );
		if ( ! is_array( $profiles ) || empty( $profiles[ $name ]['settings'] ) ) {
			return false;
		}
		$ie = new ImportExport();
		$ie->apply_import_data( array( 'settings' => $profiles[ $name ]['settings'] ) );
		if ( class_exists( '\\QWSpeedCache\\Stats\\Logger' ) ) {
			\QWSpeedCache\Stats\Logger::log( 'profile', 'Loaded profile: ' . $name );
		}
		return true;
	}
}