<?php
namespace WooNooW\Api\Controllers;

use WP_REST_Controller;
use WP_REST_Server;
use WP_REST_Request;
use WP_REST_Response;
use WP_Error;

/**
 * Settings Controller
 * Handles Customer SPA settings via REST API
 */
class SettingsController extends WP_REST_Controller {
    
    /**
     * Namespace
     */
    protected $namespace = 'woonoow/v1';
    
    /**
     * Rest base
     */
    protected $rest_base = 'settings';
    
    /**
     * Register routes
     */
    public function register_routes() {
        // Get/Update Customer SPA settings
        register_rest_route($this->namespace, '/' . $this->rest_base . '/customer-spa', [
            [
                'methods'             => WP_REST_Server::READABLE,
                'callback'            => [$this, 'get_customer_spa_settings'],
                'permission_callback' => [$this, 'get_settings_permissions_check'],
            ],
            [
                'methods'             => WP_REST_Server::CREATABLE,
                'callback'            => [$this, 'update_customer_spa_settings'],
                'permission_callback' => [$this, 'update_settings_permissions_check'],
                'args'                => $this->get_customer_spa_schema(),
            ],
        ]);
    }
    
    /**
     * Get Customer SPA settings
     */
    public function get_customer_spa_settings(WP_REST_Request $request) {
        $settings = $this->get_default_settings();
        $saved_settings = get_option('woonoow_customer_spa_settings', []);
        
        // Merge with saved settings
        if (!empty($saved_settings)) {
            $settings = array_replace_recursive($settings, $saved_settings);
        }
        
        // Add enabled flag
        $settings['enabled'] = get_option('woonoow_customer_spa_enabled', false);
        
        return new WP_REST_Response($settings, 200);
    }
    
    /**
     * Update Customer SPA settings
     */
    public function update_customer_spa_settings(WP_REST_Request $request) {
        $params = $request->get_json_params();
        
        // Extract enabled flag
        if (isset($params['enabled'])) {
            update_option('woonoow_customer_spa_enabled', (bool) $params['enabled']);
            unset($params['enabled']);
        }
        
        // Get current settings
        $current_settings = get_option('woonoow_customer_spa_settings', $this->get_default_settings());
        
        // Merge with new settings
        $new_settings = array_replace_recursive($current_settings, $params);
        
        // Validate settings
        $validated = $this->validate_settings($new_settings);
        if (is_wp_error($validated)) {
            return $validated;
        }
        
        // Save settings
        update_option('woonoow_customer_spa_settings', $new_settings);
        
        // Return updated settings
        $new_settings['enabled'] = get_option('woonoow_customer_spa_enabled', false);
        
        return new WP_REST_Response([
            'success' => true,
            'data'    => $new_settings,
        ], 200);
    }
    
    /**
     * Get default settings
     */
    private function get_default_settings() {
        return [
            'mode' => 'disabled',
            'checkoutPages' => [
                'checkout' => true,
                'thankyou' => true,
                'account'  => true,
                'cart'     => false,
            ],
            'layout' => 'modern',
            'branding' => [
                'logo'     => '',
                'favicon'  => '',
                'siteName' => get_bloginfo('name'),
            ],
            'colors' => [
                'primary'    => '#3B82F6',
                'secondary'  => '#8B5CF6',
                'accent'     => '#10B981',
                'background' => '#FFFFFF',
                'text'       => '#1F2937',
            ],
            'typography' => [
                'preset'      => 'professional',
                'customFonts' => null,
            ],
            'menus' => [
                'primary' => 0,
                'footer'  => 0,
            ],
            'homepage' => [
                'sections' => [
                    [
                        'id'      => 'hero-1',
                        'type'    => 'hero',
                        'enabled' => true,
                        'order'   => 0,
                        'config'  => [],
                    ],
                    [
                        'id'      => 'featured-1',
                        'type'    => 'featured',
                        'enabled' => true,
                        'order'   => 1,
                        'config'  => [],
                    ],
                    [
                        'id'      => 'categories-1',
                        'type'    => 'categories',
                        'enabled' => true,
                        'order'   => 2,
                        'config'  => [],
                    ],
                ],
            ],
            'product' => [
                'layout'              => 'standard',
                'showRelatedProducts' => true,
                'showReviews'         => true,
            ],
            'checkout' => [
                'style'               => 'onepage',
                'enableGuestCheckout' => true,
                'showTrustBadges'     => true,
                'showOrderSummary'    => 'sidebar',
            ],
        ];
    }
    
    /**
     * Validate settings
     */
    private function validate_settings($settings) {
        // Validate mode
        if (isset($settings['mode']) && !in_array($settings['mode'], ['disabled', 'full', 'checkout_only'])) {
            return new WP_Error(
                'invalid_mode',
                __('Invalid mode. Must be disabled, full, or checkout_only.', 'woonoow'),
                ['status' => 400]
            );
        }
        
        // Validate layout
        if (isset($settings['layout']) && !in_array($settings['layout'], ['classic', 'modern', 'boutique', 'launch'])) {
            return new WP_Error(
                'invalid_layout',
                __('Invalid layout. Must be classic, modern, boutique, or launch.', 'woonoow'),
                ['status' => 400]
            );
        }
        
        // Validate colors (hex format)
        if (isset($settings['colors'])) {
            foreach ($settings['colors'] as $key => $color) {
                if (!preg_match('/^#[a-fA-F0-9]{6}$/', $color)) {
                    return new WP_Error(
                        'invalid_color',
                        sprintf(__('Invalid color format for %s. Must be hex format (#RRGGBB).', 'woonoow'), $key),
                        ['status' => 400]
                    );
                }
            }
        }
        
        // Validate typography preset
        if (isset($settings['typography']['preset'])) {
            $valid_presets = ['professional', 'modern', 'elegant', 'tech', 'custom'];
            if (!in_array($settings['typography']['preset'], $valid_presets)) {
                return new WP_Error(
                    'invalid_typography',
                    __('Invalid typography preset.', 'woonoow'),
                    ['status' => 400]
                );
            }
        }
        
        return true;
    }
    
    /**
     * Get Customer SPA settings schema
     */
    private function get_customer_spa_schema() {
        return [
            'mode' => [
                'type'        => 'string',
                'enum'        => ['disabled', 'full', 'checkout_only'],
                'description' => __('Customer SPA mode', 'woonoow'),
            ],
            'checkoutPages' => [
                'type'       => 'object',
                'properties' => [
                    'checkout' => ['type' => 'boolean'],
                    'thankyou' => ['type' => 'boolean'],
                    'account'  => ['type' => 'boolean'],
                    'cart'     => ['type' => 'boolean'],
                ],
            ],
            'layout' => [
                'type'        => 'string',
                'enum'        => ['classic', 'modern', 'boutique', 'launch'],
                'description' => __('Master layout', 'woonoow'),
            ],
            'branding' => [
                'type'       => 'object',
                'properties' => [
                    'logo'     => ['type' => 'string'],
                    'favicon'  => ['type' => 'string'],
                    'siteName' => ['type' => 'string'],
                ],
            ],
            'colors' => [
                'type'       => 'object',
                'properties' => [
                    'primary'    => ['type' => 'string', 'pattern' => '^#[a-fA-F0-9]{6}$'],
                    'secondary'  => ['type' => 'string', 'pattern' => '^#[a-fA-F0-9]{6}$'],
                    'accent'     => ['type' => 'string', 'pattern' => '^#[a-fA-F0-9]{6}$'],
                    'background' => ['type' => 'string', 'pattern' => '^#[a-fA-F0-9]{6}$'],
                    'text'       => ['type' => 'string', 'pattern' => '^#[a-fA-F0-9]{6}$'],
                ],
            ],
            'typography' => [
                'type'       => 'object',
                'properties' => [
                    'preset'      => ['type' => 'string', 'enum' => ['professional', 'modern', 'elegant', 'tech', 'custom']],
                    'customFonts' => ['type' => ['object', 'null']],
                ],
            ],
            'menus' => [
                'type'       => 'object',
                'properties' => [
                    'primary' => ['type' => 'integer'],
                    'footer'  => ['type' => 'integer'],
                ],
            ],
            'homepage' => [
                'type'       => 'object',
                'properties' => [
                    'sections' => ['type' => 'array'],
                ],
            ],
            'product' => [
                'type'       => 'object',
                'properties' => [
                    'layout'              => ['type' => 'string'],
                    'showRelatedProducts' => ['type' => 'boolean'],
                    'showReviews'         => ['type' => 'boolean'],
                ],
            ],
            'checkout' => [
                'type'       => 'object',
                'properties' => [
                    'style'               => ['type' => 'string'],
                    'enableGuestCheckout' => ['type' => 'boolean'],
                    'showTrustBadges'     => ['type' => 'boolean'],
                    'showOrderSummary'    => ['type' => 'string'],
                ],
            ],
        ];
    }
    
    /**
     * Check permissions for getting settings
     */
    public function get_settings_permissions_check() {
        return current_user_can('manage_woocommerce');
    }
    
    /**
     * Check permissions for updating settings
     */
    public function update_settings_permissions_check() {
        return current_user_can('manage_woocommerce');
    }
}