<?php
/**
 * Payments REST API Controller
 * 
 * Provides REST endpoints for payment gateway management.
 * 
 * @package WooNooW
 */

namespace WooNooW\API;

use WooNooW\Compat\PaymentGatewaysProvider;
use WP_REST_Controller;
use WP_REST_Server;
use WP_REST_Request;
use WP_REST_Response;
use WP_Error;

class PaymentsController extends WP_REST_Controller {
    
    /**
     * Namespace
     */
    protected $namespace = 'woonoow/v1';
    
    /**
     * Rest base
     */
    protected $rest_base = 'payments';
    
    /**
     * Register routes
     */
    public function register_routes() {
        // GET /woonoow/v1/payments/gateways
        register_rest_route($this->namespace, '/' . $this->rest_base . '/gateways', [
            [
                'methods' => WP_REST_Server::READABLE,
                'callback' => [$this, 'get_gateways'],
                'permission_callback' => [$this, 'check_permission'],
            ],
            'schema' => [$this, 'get_gateways_schema'],
        ]);
        
        // POST /woonoow/v1/payments/gateways/order
        // IMPORTANT: Register this BEFORE the dynamic {id} routes to avoid conflicts
        register_rest_route($this->namespace, '/' . $this->rest_base . '/gateways/order', [
            [
                'methods' => WP_REST_Server::EDITABLE,
                'callback' => [$this, 'save_gateway_order'],
                'permission_callback' => [$this, 'check_permission'],
                'args' => [
                    'category' => [
                        'description' => 'Gateway category (manual or online)',
                        'type' => 'string',
                        'required' => true,
                        'enum' => ['manual', 'online'],
                    ],
                    'order' => [
                        'description' => 'Array of gateway IDs in desired order',
                        'type' => 'array',
                        'required' => true,
                        'items' => [
                            'type' => 'string',
                        ],
                    ],
                ],
            ],
        ]);
        
        // GET /woonoow/v1/payments/gateways/{id}
        register_rest_route($this->namespace, '/' . $this->rest_base . '/gateways/(?P<id>[a-zA-Z0-9_-]+)', [
            [
                'methods' => WP_REST_Server::READABLE,
                'callback' => [$this, 'get_gateway'],
                'permission_callback' => [$this, 'check_permission'],
                'args' => [
                    'id' => [
                        'description' => 'Gateway ID',
                        'type' => 'string',
                        'required' => true,
                    ],
                ],
            ],
        ]);
        
        // POST /woonoow/v1/payments/gateways/{id}
        register_rest_route($this->namespace, '/' . $this->rest_base . '/gateways/(?P<id>[a-zA-Z0-9_-]+)', [
            [
                'methods' => WP_REST_Server::EDITABLE,
                'callback' => [$this, 'save_gateway'],
                'permission_callback' => [$this, 'check_permission'],
                'args' => [
                    'id' => [
                        'description' => 'Gateway ID',
                        'type' => 'string',
                        'required' => true,
                    ],
                ],
            ],
        ]);
        
        // POST /woonoow/v1/payments/gateways/{id}/toggle
        register_rest_route($this->namespace, '/' . $this->rest_base . '/gateways/(?P<id>[a-zA-Z0-9_-]+)/toggle', [
            [
                'methods' => WP_REST_Server::EDITABLE,
                'callback' => [$this, 'toggle_gateway'],
                'permission_callback' => [$this, 'check_permission'],
                'args' => [
                    'id' => [
                        'description' => 'Gateway ID',
                        'type' => 'string',
                        'required' => true,
                    ],
                    'enabled' => [
                        'description' => 'Enable or disable gateway',
                        'type' => 'boolean',
                        'required' => true,
                    ],
                ],
            ],
        ]);
    }
    
    /**
     * Get all payment gateways
     * 
     * @param WP_REST_Request $request Request object
     * @return WP_REST_Response|WP_Error Response object or error
     */
    public function get_gateways(WP_REST_Request $request) {
        try {
            $gateways = PaymentGatewaysProvider::get_gateways();
            
            // Get saved order
            $manual_order = get_option('woonoow_payment_gateway_order_manual', []);
            $online_order = get_option('woonoow_payment_gateway_order_online', []);
            
            $response = rest_ensure_response([
                'gateways' => $gateways,
                'order' => [
                    'manual' => $manual_order,
                    'online' => $online_order,
                ],
            ]);
            
            // Cache for 5 minutes
            $response->header('Cache-Control', 'max-age=300');
            
            return $response;
        } catch (\Exception $e) {
            return new WP_Error(
                'get_gateways_failed',
                $e->getMessage(),
                ['status' => 500]
            );
        }
    }
    
    /**
     * Get single payment gateway
     * 
     * @param WP_REST_Request $request Request object
     * @return WP_REST_Response|WP_Error Response object or error
     */
    public function get_gateway(WP_REST_Request $request) {
        $gateway_id = $request->get_param('id');
        
        try {
            $gateway = PaymentGatewaysProvider::get_gateway($gateway_id);
            
            if ($gateway === null) {
                return new WP_Error(
                    'gateway_not_found',
                    sprintf('Gateway "%s" not found', $gateway_id),
                    ['status' => 404]
                );
            }
            
            $response = rest_ensure_response($gateway);
            
            // Cache for 5 minutes
            $response->header('Cache-Control', 'max-age=300');
            
            return $response;
        } catch (\Exception $e) {
            return new WP_Error(
                'get_gateway_failed',
                $e->getMessage(),
                ['status' => 500]
            );
        }
    }
    
    /**
     * Save gateway settings
     * 
     * @param WP_REST_Request $request Request object
     * @return WP_REST_Response|WP_Error Response object or error
     */
    public function save_gateway(WP_REST_Request $request) {
        $gateway_id = $request->get_param('id');
        $settings = $request->get_json_params();
        
        if (empty($settings)) {
            return new WP_Error(
                'missing_settings',
                'No settings provided',
                ['status' => 400]
            );
        }
        
        try {
            // Debug: Log what we're saving
            error_log(sprintf('[WooNooW] Saving gateway %s settings: %s', $gateway_id, json_encode($settings)));
            
            $result = PaymentGatewaysProvider::save_gateway_settings($gateway_id, $settings);
            
            if (is_wp_error($result)) {
                error_log(sprintf('[WooNooW] Save failed: %s', $result->get_error_message()));
                return $result;
            }
            
            // Clear cache before fetching updated gateway
            wp_cache_flush();
            
            // Return updated gateway data (fresh from DB)
            $gateway = PaymentGatewaysProvider::get_gateway($gateway_id);
            
            // Debug: Log success
            error_log(sprintf('[WooNooW] Gateway %s settings saved successfully', $gateway_id));
            
            return rest_ensure_response([
                'success' => true,
                'message' => 'Gateway settings saved successfully',
                'gateway' => $gateway,
            ]);
        } catch (\Exception $e) {
            error_log(sprintf('[WooNooW] Save exception: %s', $e->getMessage()));
            return new WP_Error(
                'save_gateway_failed',
                $e->getMessage(),
                ['status' => 500]
            );
        }
    }
    
    /**
     * Toggle gateway enabled status
     * 
     * @param WP_REST_Request $request Request object
     * @return WP_REST_Response|WP_Error Response object or error
     */
    public function toggle_gateway(WP_REST_Request $request) {
        $gateway_id = $request->get_param('id');
        $enabled = $request->get_param('enabled');
        
        // Convert to boolean (handles both bool and string "true"/"false")
        $enabled = filter_var($enabled, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
        
        if ($enabled === null) {
            return new WP_Error(
                'invalid_enabled_value',
                'The "enabled" parameter must be a boolean',
                ['status' => 400]
            );
        }
        
        try {
            // Debug: Log what we're trying to do
            error_log(sprintf('[WooNooW] Toggling gateway %s to %s', $gateway_id, $enabled ? 'enabled' : 'disabled'));
            
            $result = PaymentGatewaysProvider::toggle_gateway($gateway_id, $enabled);
            
            if (is_wp_error($result)) {
                error_log(sprintf('[WooNooW] Toggle failed: %s', $result->get_error_message()));
                return $result;
            }
            
            // Clear cache before fetching updated gateway
            wp_cache_flush();
            
            // Return updated gateway data (fresh from DB)
            $gateway = PaymentGatewaysProvider::get_gateway($gateway_id);
            
            // Debug: Log what we got back
            error_log(sprintf('[WooNooW] Gateway %s after toggle: enabled=%s', $gateway_id, $gateway['enabled'] ? 'true' : 'false'));
            
            return rest_ensure_response([
                'success' => true,
                'message' => $enabled ? 'Gateway enabled' : 'Gateway disabled',
                'gateway' => $gateway,
            ]);
        } catch (\Exception $e) {
            error_log(sprintf('[WooNooW] Toggle exception: %s', $e->getMessage()));
            return new WP_Error(
                'toggle_gateway_failed',
                $e->getMessage(),
                ['status' => 500]
            );
        }
    }
    
    /**
     * Save gateway order
     * 
     * @param WP_REST_Request $request Request object
     * @return WP_REST_Response|WP_Error Response object or error
     */
    public function save_gateway_order(WP_REST_Request $request) {
        $category = $request->get_param('category');
        $order = $request->get_param('order');
        
        // Validate category
        if (!in_array($category, ['manual', 'online'], true)) {
            return new WP_Error(
                'invalid_category',
                'Category must be either "manual" or "online"',
                ['status' => 400]
            );
        }
        
        // Validate order is array
        if (!is_array($order)) {
            return new WP_Error(
                'invalid_order',
                'Order must be an array of gateway IDs',
                ['status' => 400]
            );
        }
        
        // Save to WordPress options
        $option_key = 'woonoow_payment_gateway_order_' . $category;
        update_option($option_key, $order, false);
        
        error_log(sprintf('[WooNooW] Saved %s gateway order: %s', $category, implode(', ', $order)));
        
        return rest_ensure_response([
            'success' => true,
            'message' => 'Gateway order saved successfully',
            'category' => $category,
            'order' => $order,
        ]);
    }
    
    /**
     * Check permission
     * 
     * @return bool True if user has permission
     */
    public function check_permission() {
        return current_user_can('manage_woocommerce');
    }
    
    /**
     * Get gateways collection schema
     * 
     * @return array Schema
     */
    public function get_gateways_schema() {
        return [
            '$schema' => 'http://json-schema.org/draft-04/schema#',
            'title' => 'payment-gateways',
            'type' => 'array',
            'items' => [
                'type' => 'object',
                'properties' => [
                    'id' => [
                        'description' => 'Gateway ID',
                        'type' => 'string',
                    ],
                    'title' => [
                        'description' => 'Gateway title',
                        'type' => 'string',
                    ],
                    'description' => [
                        'description' => 'Gateway description',
                        'type' => 'string',
                    ],
                    'enabled' => [
                        'description' => 'Whether gateway is enabled',
                        'type' => 'boolean',
                    ],
                    'type' => [
                        'description' => 'Gateway type',
                        'type' => 'string',
                        'enum' => ['manual', 'provider', 'other'],
                    ],
                ],
            ],
        ];
    }
}