<?php
/**
 * Class to handle feature Coupons By Payment Method
 *
 * @author      StoreApps
 * @category    Admin
 * @package     wocommerce-smart-coupons/includes
 * @version     1.14.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

if ( ! class_exists( 'WC_SC_Coupons_By_Payment_Method' ) ) {

	/**
	 * Class WC_SC_Coupons_By_Payment_Method
	 */
	class WC_SC_Coupons_By_Payment_Method {

		/**
		 * Variable to hold instance of this class
		 *
		 * @var $instance
		 */
		private static $instance = null;


		/**
		 * Constructor
		 */
		private function __construct() {

			add_action( 'woocommerce_coupon_options_usage_restriction', array( $this, 'usage_restriction' ), 10, 2 );
			add_action( 'woocommerce_coupon_options_save', array( $this, 'process_meta' ), 10, 2 );
			add_filter( 'woocommerce_coupon_is_valid', array( $this, 'validate' ), 11, 3 );
			add_filter( 'wc_smart_coupons_export_headers', array( $this, 'export_headers' ) );
			add_filter( 'wc_sc_export_coupon_meta', array( $this, 'export_coupon_meta_data' ), 10, 2 );
			add_filter( 'smart_coupons_parser_postmeta_defaults', array( $this, 'postmeta_defaults' ) );
			add_filter( 'sc_generate_coupon_meta', array( $this, 'generate_coupon_meta' ), 10, 2 );
			add_filter( 'wc_sc_process_coupon_meta_value_for_import', array( $this, 'process_coupon_meta_value_for_import' ), 10, 2 );
			add_filter( 'is_protected_meta', array( $this, 'make_action_meta_protected' ), 10, 3 );
			add_action( 'woocommerce_cart_calculate_fees', array( $this, 'handle_payment_method_coupon_logic' ), 10, 3 );
			add_action( 'wc_sc_new_coupon_generated', array( $this, 'copy_coupon_payment_method_meta' ) );
			add_action( 'wp_footer', array( $this, 'styles_and_scripts' ) );

			add_action( 'wp_ajax_wc_sc_update_wc_payment_method_on_change', array( $this, 'wc_sc_update_wc_payment_method_on_change' ) );
			add_action( 'wp_ajax_nopriv_wc_sc_update_wc_payment_method_on_change', array( $this, 'wc_sc_update_wc_payment_method_on_change' ) );
		}

		/**
		 * Get single instance of this class
		 *
		 * @return this class Singleton object of this class
		 */
		public static function get_instance() {
			// Check if instance is already exists.
			if ( is_null( self::$instance ) ) {
				self::$instance = new self();
			}

			return self::$instance;
		}

		/**
		 * Handle call to functions which is not available in this class
		 *
		 * @param string $function_name The function name.
		 * @param array  $arguments Array of arguments passed while calling $function_name.
		 * @return result of function call
		 */
		public function __call( $function_name = '', $arguments = array() ) {

			global $woocommerce_smart_coupon;

			if ( ! is_callable( array( $woocommerce_smart_coupon, $function_name ) ) ) {
				return;
			}

			if ( ! empty( $arguments ) ) {
				return call_user_func_array( array( $woocommerce_smart_coupon, $function_name ), $arguments );
			} else {
				return call_user_func( array( $woocommerce_smart_coupon, $function_name ) );
			}

		}

		/**
		 * Display field for coupon by payment method
		 *
		 * @param integer   $coupon_id The coupon id.
		 * @param WC_Coupon $coupon    The coupon object.
		 */
		public function usage_restriction( $coupon_id = 0, $coupon = null ) {
			try {
				$payment_method_ids = array();
				if ( ! empty( $coupon_id ) ) {
					$payment_method_ids = $this->get_post_meta( $coupon_id, 'wc_sc_payment_method_ids', true );
					if ( empty( $payment_method_ids ) || ! is_array( $payment_method_ids ) ) {
						$payment_method_ids = array();
					}
				}
				$available_payment_methods = WC()->payment_gateways->get_available_payment_gateways();
				?>
				<div class="options_group smart-coupons-field">
					<p class="form-field">
						<label for="wc_sc_payment_method_ids"><?php echo esc_html__( 'Payment methods', 'woocommerce-smart-coupons' ); ?></label>
						<select id="wc_sc_payment_method_ids" name="wc_sc_payment_method_ids[]" style="width: 50%;"  class="wc-enhanced-select" multiple="multiple" data-placeholder="<?php esc_attr_e( 'No payment methods', 'woocommerce-smart-coupons' ); ?>">
							<?php
							if ( is_array( $available_payment_methods ) && ! empty( $available_payment_methods ) ) {
								foreach ( $available_payment_methods as $payment_method ) {
									echo '<option value="' . esc_attr( $payment_method->id ) . '"' . esc_attr( selected( in_array( $payment_method->id, $payment_method_ids, true ), true, false ) ) . '>' . esc_html( $payment_method->get_title() ) . '</option>';
								}
							}
							?>
						</select>
						<?php
						$tooltip_text = esc_html__( 'Coupon will apply only if any of the selected payment methods are used during checkout.', 'woocommerce-smart-coupons' );
						echo wc_help_tip( $tooltip_text ); // phpcs:ignore
						?>
					</p>
				</div>
				<?php
			} catch ( \Throwable $e ) {
				$this->sc_block_catch_error( $e );
			}
		}

		/**
		 * Save coupon by payment method data in meta
		 *
		 * @param  Integer   $post_id The coupon post ID.
		 * @param  WC_Coupon $coupon    The coupon object.
		 */
		public function process_meta( $post_id = 0, $coupon = null ) {
			try {
				if ( empty( $post_id ) ) {
					return;
				}

				$coupon = new WC_Coupon( $coupon );

				$payment_method_ids = ( isset( $_POST['wc_sc_payment_method_ids'] ) ) ? wc_clean( wp_unslash( $_POST['wc_sc_payment_method_ids'] ) ) : array(); // phpcs:ignore

				if ( $this->is_callable( $coupon, 'update_meta_data' ) && $this->is_callable( $coupon, 'save' ) ) {
					$coupon->update_meta_data( 'wc_sc_payment_method_ids', $payment_method_ids );
					$coupon->save();
				} else {
					$this->update_post_meta( $post_id, 'wc_sc_payment_method_ids', $payment_method_ids );
				}
			} catch ( \Throwable $e ) {
				$this->sc_block_catch_error( $e );
			}
		}

		/**
		 * Validate the coupon based on payment method
		 *
		 * @param  boolean      $valid  Is valid or not.
		 * @param  WC_Coupon    $coupon The coupon object.
		 * @param  WC_Discounts $discounts The discount object.
		 *
		 * @throws Exception If the coupon is invalid.
		 * @return boolean           Is valid or not
		 */
		public function validate( $valid = false, $coupon = object, $discounts = object ) {
			// If coupon is already invalid, no need for further checks.
			if ( false === $valid ) {
				return $valid;
			}

			if ( ! $coupon instanceof WC_Coupon ) {
				return $valid;
			}

			if ( ! $discounts instanceof WC_Discounts ) {
				return $valid;
			}

			if ( $this->is_wc_gte_30() ) {
				$coupon_id   = ( ! empty( $coupon ) && is_callable( array( $coupon, 'get_id' ) ) ) ? $coupon->get_id() : 0;
				$coupon_code = ( ! empty( $coupon ) && is_callable( array( $coupon, 'get_code' ) ) ) ? $coupon->get_code() : '';
			} else {
				$coupon_id   = ( ! empty( $coupon->id ) ) ? $coupon->id : 0;
				$coupon_code = ( ! empty( $coupon->code ) ) ? $coupon->code : '';
			}

			if ( empty( $coupon_id ) ) {
				return $valid;
			}

			$payment_method_ids   = $this->get_post_meta( $coupon_id, 'wc_sc_payment_method_ids', true );
			$cart_or_order_object = is_callable( array( $discounts, 'get_object' ) ) ? $discounts->get_object() : null;
			$is_wc_session        = is_a( $cart_or_order_object, 'WC_Cart' ) && function_exists( 'WC' ) && isset( WC()->session ) && is_object( WC()->session );
			$needs_payment        = ( $this->is_callable( $cart_or_order_object, 'needs_payment' ) ) ? $cart_or_order_object->needs_payment() : true;
			$posted_data          = array();
			$post_data            = isset( $_POST['post_data'] ) && ! empty( $_POST['post_data'] ) ? wc_clean( wp_unslash( $_POST['post_data'] ) ) : ''; // phpcs:ignore
			wp_parse_str( $post_data, $posted_data );

			if ( true === $needs_payment && is_array( $payment_method_ids ) && ! empty( $payment_method_ids ) ) {
				$payment_titles        = $this->get_payment_method_titles_by_ids( $payment_method_ids );
				$chosen_payment_method = '';
				if ( is_a( $cart_or_order_object, 'WC_Order' ) ) {
					$chosen_payment_method = is_callable( array( $cart_or_order_object, 'get_payment_method' ) ) ? $cart_or_order_object->get_payment_method() : '';
				} elseif ( ! empty( $posted_data ) && isset( $posted_data['payment_method'] ) ) {
					$chosen_payment_method = $posted_data['payment_method'];
				} elseif ( true === $is_wc_session ) {
					$chosen_payment_method = ( WC()->session->__isset( 'chosen_payment_method' ) ) ? WC()->session->get( 'chosen_payment_method' ) : '';
				}
				if ( ! in_array( $chosen_payment_method, $payment_method_ids, true ) ) {
					$applied_coupons = ( WC()->cart instanceof WC_Cart && is_callable( array( WC()->cart, 'get_applied_coupons' ) ) ) ? WC()->cart->get_applied_coupons() : array();
					if ( ! empty( $applied_coupons ) && $this->sc_coupon_code_exists( $coupon_code, $applied_coupons ) ) {
						WC()->cart->remove_coupon( $coupon_code );
						/* translators: 1. The coupon code 2. The text 'payment method/s' 3. List of payment method names 4. Link to the checkout page */
						wc_add_notice( sprintf( __( 'Coupon code %1$s has been removed. It is valid only for %2$s: %3$s. You can change the payment method from the %4$s page.', 'woocommerce-smart-coupons' ), '<code>' . $coupon_code . '</code>', _n( 'payment method', 'payment methods', count( $payment_titles ), 'woocommerce-smart-coupons' ), '<strong>"' . implode( '", "', $payment_titles ) . '"</strong>', '<a href="' . esc_url( wc_get_checkout_url() ) . '"><strong>' . __( 'Checkout', 'woocommerce-smart-coupons' ) . '</strong></a>' ), 'error' );
					}

					/* translators: 1. The coupon code 2. The text 'payment method/s' 3. List of payment method names 4. Link to the checkout page */
					throw new Exception( sprintf( __( 'Coupon code %1$s is valid only for %2$s: %3$s. You can change payment method from the %4$s page.', 'woocommerce-smart-coupons' ), '<code>' . $coupon_code . '</code>', _n( 'payment method', 'payment methods', count( $payment_titles ), 'woocommerce-smart-coupons' ), '<strong>"' . implode( '", "', $payment_titles ) . '"</strong>', '<a href="' . esc_url( wc_get_checkout_url() ) . '"><strong>' . __( 'Checkout', 'woocommerce-smart-coupons' ) . '</strong></a>' ) );
				}
			}

			return $valid;
		}

		/**
		 * Add meta in export headers
		 *
		 * @param  array $headers Existing headers.
		 * @return array
		 */
		public function export_headers( $headers = array() ) {

			$headers['wc_sc_payment_method_ids'] = __( 'Payment methods', 'woocommerce-smart-coupons' );

			return $headers;

		}

		/**
		 * Function to handle coupon meta data during export of existing coupons
		 *
		 * @param  mixed $meta_value The meta value.
		 * @param  array $args       Additional arguments.
		 * @return string Processed meta value
		 */
		public function export_coupon_meta_data( $meta_value = '', $args = array() ) {
			try {
				if ( ! empty( $args['meta_key'] ) && 'wc_sc_payment_method_ids' === $args['meta_key'] ) {
					if ( isset( $args['meta_value'] ) && ! empty( $args['meta_value'] ) ) {
						$payment_method_ids = maybe_unserialize( stripslashes( $args['meta_value'] ) );
						if ( is_array( $payment_method_ids ) && ! empty( $payment_method_ids ) ) {
							$payment_method_titles = $this->get_payment_method_titles_by_ids( $payment_method_ids );
							if ( is_array( $payment_method_titles ) && ! empty( $payment_method_titles ) ) {
								$meta_value = implode( '|', wc_clean( wp_unslash( $payment_method_titles ) ) );  // Replace payment method ids with their respective method titles.
							}
						}
					}
				}
			} catch ( \Throwable $e ) {
				$this->sc_block_catch_error( $e );
			}

			return $meta_value;

		}

		/**
		 * Post meta defaults for payment method ids meta
		 *
		 * @param  array $defaults Existing postmeta defaults.
		 * @return array $defaults Modified postmeta defaults
		 */
		public function postmeta_defaults( $defaults = array() ) {

			$defaults['wc_sc_payment_method_ids'] = '';

			return $defaults;
		}

		/**
		 * Add payment method's meta with value in coupon meta
		 *
		 * @param  array $data The row data.
		 * @param  array $post The POST values.
		 * @return array $data Modified row data
		 */
		public function generate_coupon_meta( $data = array(), $post = array() ) {

			$payment_method_titles = '';

			if ( ! empty( $post['wc_sc_payment_method_ids'] ) && is_array( $post['wc_sc_payment_method_ids'] ) ) {
				$payment_method_titles = $this->get_payment_method_titles_by_ids( $post['wc_sc_payment_method_ids'] );
				if ( is_array( $payment_method_titles ) && ! empty( $payment_method_titles ) ) {
					$payment_method_titles = implode( '|', wc_clean( wp_unslash( $payment_method_titles ) ) );
				}
			}

			$data['wc_sc_payment_method_ids'] = $payment_method_titles; // Replace payment method ids with their respective method titles.

			return $data;
		}

		/**
		 * Function to get payment method titles for given payment method ids
		 *
		 * @param  array $payment_method_ids ids of payment methods.
		 * @return array $payment_method_titles titles of payment methods
		 */
		public function get_payment_method_titles_by_ids( $payment_method_ids = array() ) {

			$payment_method_titles = array();

			if ( is_array( $payment_method_ids ) && ! empty( $payment_method_ids ) ) {
				$available_payment_methods = WC()->payment_gateways->get_available_payment_gateways();
				foreach ( $payment_method_ids as $index => $payment_method_id ) {
					$payment_method = ( isset( $available_payment_methods[ $payment_method_id ] ) && ! empty( $available_payment_methods[ $payment_method_id ] ) ) ? $available_payment_methods[ $payment_method_id ] : '';
					if ( ! empty( $payment_method ) && is_a( $payment_method, 'WC_Payment_Gateway' ) ) {
						$payment_method_title = is_callable( array( $payment_method, 'get_title' ) ) ? $payment_method->get_title() : '';
						if ( ! empty( $payment_method_title ) ) {
							$payment_method_titles[ $index ] = $payment_method_title; // Replace payment method id with it's repective title.
						} else {
							$payment_method_titles[ $index ] = $payment_method->id; // In case of empty payment method title replace it with method id.
						}
					}
				}
			}

			return $payment_method_titles;
		}

		/**
		 * Process coupon meta value for import
		 *
		 * @param  mixed $meta_value The meta value.
		 * @param  array $args       Additional Arguments.
		 * @return mixed $meta_value
		 */
		public function process_coupon_meta_value_for_import( $meta_value = null, $args = array() ) {
			try {
				if ( ! empty( $args['meta_key'] ) && 'wc_sc_payment_method_ids' === $args['meta_key'] ) {

					$meta_value = ( ! empty( $args['postmeta']['wc_sc_payment_method_ids'] ) ) ? explode( '|', wc_clean( wp_unslash( $args['postmeta']['wc_sc_payment_method_ids'] ) ) ) : array();
					if ( is_array( $meta_value ) && ! empty( $meta_value ) ) {
						$available_payment_methods = WC()->payment_gateways->get_available_payment_gateways();
						if ( is_array( $available_payment_methods ) && ! empty( $available_payment_methods ) ) {
							foreach ( $meta_value as $index => $payment_method_title ) {
								foreach ( $available_payment_methods as $payment_method ) {
									$method_title = is_callable( array( $payment_method, 'get_title' ) ) ? $payment_method->get_title() : '';
									if ( $method_title === $payment_method_title && ! empty( $payment_method->id ) ) {
										$meta_value[ $index ] = $payment_method->id; // Replace payment method title with it's respective id.
									}
								}
							}
						}
					}
				}
			} catch ( \Throwable $e ) {
				$this->sc_block_catch_error( $e );
				$meta_value = array();
			}

			return $meta_value;
		}

		/**
		 * Function to copy payment method restriction meta in newly generated coupon
		 *
		 * @param  array $args The arguments.
		 */
		public function copy_coupon_payment_method_meta( $args = array() ) {
			try {
				// Copy meta data to new coupon.
				$this->copy_coupon_meta_data(
					$args,
					array( 'wc_sc_payment_method_ids' )
				);
			} catch ( \Throwable $e ) {
				$this->sc_block_catch_error( $e );
			}

		}

		/**
		 * Make meta data of payment method ids protected
		 *
		 * @param bool   $protected Is protected.
		 * @param string $meta_key The meta key.
		 * @param string $meta_type The meta type.
		 * @return bool $protected
		 */
		public function make_action_meta_protected( $protected = false, $meta_key = '', $meta_type = '' ) {

			if ( 'wc_sc_payment_method_ids' === $meta_key ) {
				return true;
			}
			return $protected;
		}

		/**
		 * Logic to auto-apply coupons based on payment method at checkout (Block).
		 */
		public function handle_payment_method_coupon_logic() {
			try {
				if ( is_admin() && ! defined( 'DOING_AJAX' ) ) {
					return;
				}

				$checkout_page_id = absint( get_option( 'woocommerce_checkout_page_id' ) );
				if ( ! has_block( 'woocommerce-smart-coupons/available-coupons', $checkout_page_id ) ) {
					return;
				}

				$chosen_payment_method_id = WC()->session->get( 'chosen_payment_method' );
				if ( ! empty( $chosen_payment_method_id ) ) {
					if ( class_exists( 'WC_SC_Auto_Apply_Coupon' ) ) {
						$auto_apply_class = WC_SC_Auto_Apply_Coupon::get_instance();
						$auto_apply_class->auto_apply_coupons();
					}
				}
			} catch ( \Throwable $e ) {
				$this->sc_block_catch_error( $e );
			}
		}

		/**
		 * Function to add styles & scripts
		 */
		public function styles_and_scripts() {

			if ( is_woocommerce() || is_cart() || is_checkout() || is_product_category() || is_product_tag() || is_account_page() ) {
				$js = "
				try {
					let checkoutForm = document.querySelector('form.checkout');
					if( checkoutForm ){
						
						checkoutForm.addEventListener('change', function(event) {
							
								if (event.target && event.target.name === 'payment_method') {
									setTimeout(function() {
										document.body.dispatchEvent(new Event('update_checkout'));
									}, 1000);
								}
						});
					}

				} catch( error ) {
					console.error( '" . esc_js( __( 'An error occurred:', 'woocommerce-smart-coupons' ) ) . "', error);
				}";

				if ( is_checkout() ) {
					$js .= "
						function sendPaymentMethodToBackend( paymentMethod ){
							const data = 'action=wc_sc_update_wc_payment_method_on_change&payment_method=' + encodeURIComponent( paymentMethod ) + '&nonce=" . wp_create_nonce( 'wc_sc_update_payment_nonce' ) . "';

							// Create a new XMLHttpRequest instance for each request
							const xhr = new XMLHttpRequest();
							xhr?.open( 'POST', '" . esc_url( admin_url( 'admin-ajax.php' ) ) . "', true );
							xhr?.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded' );

							// Handle the response
							xhr.onreadystatechange = function() {
								if ( xhr?.readyState === XMLHttpRequest?.DONE && xhr?.status === 200 ) {
									const response = JSON?.parse( xhr?.responseText );
									if ( response?.success === true ) {
										if (typeof sc_load_coupons === 'function') {
											sc_load_coupons();
										}
										wp?.data?.dispatch( window?.wc?.wcBlocksData?.CART_STORE_KEY ).invalidateResolutionForStore();
									}
								}
							};

							// Send the request with the selected payment method
							xhr?.send(data);
						}

						( function() {
							var onloadPaymentUpdate = true;
							const attachEventListeners = function() {
								const radioButtons = document.querySelectorAll('.wp-block-woocommerce-checkout-payment-block input[type=radio]');
								
								radioButtons.forEach( radio => {
									// Check if listener already attached to avoid multiple listeners

									if (radio.checked && onloadPaymentUpdate) {
										onloadPaymentUpdate = false;
										sendPaymentMethodToBackend( radio.value );
									}

									if ( ! radio?.dataset?.listener ) {
										radio.addEventListener( 'change', function() {
											const selectedPaymentMethod = this.value;
											sendPaymentMethodToBackend( selectedPaymentMethod );
										});
										// Mark listener as attached
										radio.dataset.listener = 'true';
									}
								});
							};

							// Create a MutationObserver to detect changes in the DOM
							const observer = new MutationObserver(function(mutations) {
								mutations.forEach(function(mutation) {
									if (mutation.addedNodes.length) {
										attachEventListeners();  // Attach listeners if new radio buttons appear
									}
								});
							});

							// Observe the target node for added child nodes
							const targetNode = document.body; // or another specific parent node
							observer.observe(targetNode, {
								childList: true,
								subtree: true
							});

							// Initial call to attach listeners
							attachEventListeners();
						} )();
					";
				}

				wc_enqueue_js( $js );
			}

		}

		/**
		 * Handles AJAX request to update the WooCommerce chosen payment method and trigger coupon validation.
		 *
		 * @return void
		 */
		public function wc_sc_update_wc_payment_method_on_change() {
			// Verify nonce for security.
			if ( ! isset( $_POST['nonce'] ) || ! wp_verify_nonce( wc_clean( wp_unslash( $_POST['nonce'] ) ), 'wc_sc_update_payment_nonce' ) ) { // phpcs:ignore
				wp_send_json_error( array( 'message' => _x( 'Nonce verification failed.', 'Error message for nonce verification failure', 'woocommerce-smart-coupons' ) ) );
				wp_die();
			}

			// Verify that the payment method is set in the AJAX request.
			if ( isset( $_POST['payment_method'] ) ) {
				// Sanitize the payment method input to prevent security issues.
				$payment_method = sanitize_text_field( wp_unslash( $_POST['payment_method'] ) );

				// Check if the payment method is a numeric value (indicating it's a saved card token).
				if ( is_numeric( $payment_method ) ) {
					// Fetch the saved card token.
					$token = WC_Payment_Tokens::get( $payment_method );

					// If the token exists and is valid.
					if ( $token && $token->get_user_id() === get_current_user_id() ) {
						// Retrieve the actual payment method associated with the saved card.
						$payment_method = $token->get_gateway_id();
					} else {
						// If the token is invalid or does not belong to the current user, return an error.
						wp_send_json_error( array( 'message' => _x( 'Invalid saved card selected.', 'Error message for invalid saved card', 'woocommerce-smart-coupons' ) ) );
						wp_die();
					}
				}

				// Ensure that both WooCommerce session and cart are available before proceeding.
				if ( WC()->session && WC()->cart ) {
					// Update the WooCommerce session with the new chosen payment method.
					WC()->session->set( 'chosen_payment_method', $payment_method );

					// Recalculate the cart totals to validate coupons.
					WC()->cart->calculate_totals();

					// Send a success response back to the frontend with a confirmation message.
					wp_send_json_success( array( 'message' => _x( 'Payment method updated successfully, and coupons validated.', 'Success message after updating payment method and validating coupons', 'woocommerce-smart-coupons' ) ) );
				} else {
					// If WooCommerce cart or session is not available, return an error response.
					wp_send_json_error( array( 'message' => _x( 'Cart or session not available.', 'Error message when cart or session is missing', 'woocommerce-smart-coupons' ) ) );
				}
			} else {
				// If the payment method was not provided, return an error response.
				wp_send_json_error( array( 'message' => _x( 'Payment method not provided.', 'Error message when payment method is missing in request', 'woocommerce-smart-coupons' ) ) );
			}

			// Terminate the AJAX request to avoid further output.
			wp_die();
		}
	}
}

WC_SC_Coupons_By_Payment_Method::get_instance();
