<?php
/**
 * Pre Checkout Offer
 *
 * @package cartflows
 */

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

/**
 * Order Bump Product
 *
 * @since 1.0.0
 */
class Cartflows_Pre_Checkout_Offer_Product {

	/**
	 * Member Variable
	 *
	 * @var object instance
	 */
	protected static $instance;

	/**
	 *  Initiator
	 */
	public static function get_instance() {
		if ( ! isset( self::$instance ) ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 *  Constructor
	 */
	public function __construct() {
		// Preview pre-checkout in gutenberg editor.
		add_filter( 'global_cartflows_js_localize', array( $this, 'add_localize_vars' ), 10, 1 );

		add_action( 'wp_footer', array( $this, 'wcf_add_pre_checkout_offer_modal' ), 99, 1 );
		add_action( 'admin_footer', array( $this, 'wcf_add_pre_checkout_offer_modal' ) );

		add_action( 'wp_ajax_wcf_add_to_cart', array( $this, 'wcf_add_pre_checkout_product' ) );
		add_action( 'wp_ajax_nopriv_wcf_add_to_cart', array( $this, 'wcf_add_pre_checkout_product' ) );

		add_action( 'wc_ajax_wcf_validate_form', array( $this, 'wcf_precheckout_validate_form' ) );

		add_action( 'woocommerce_before_calculate_totals', array( $this, 'wcf_precheckout_offer_price_to_cart_item' ), 9999 );

	}

	/**
	 * Add localize variables.
	 *
	 * @param array $localize localize array.
	 *
	 * @since 1.0.0
	 */
	public function add_localize_vars( $localize ) {

		$localize['wcf_pre_checkout_offer_nonce'] = wp_create_nonce( 'wcf_pre_checkout_offer' );

		return $localize;
	}


	/**
	 *  Validate form
	 */
	public function wcf_precheckout_validate_form() {

		$errors      = new \WP_Error();
		$posted_data = WC()->checkout->get_posted_data();

		// Update customer shipping and payment method to posted method.
		$chosen_shipping_methods = WC()->session->get( 'chosen_shipping_methods' );

		if ( is_array( $posted_data['shipping_method'] ) ) {
			foreach ( $posted_data['shipping_method'] as $i => $value ) {
				$chosen_shipping_methods[ $i ] = $value;
			}
		}

		WC()->session->set( 'chosen_shipping_methods', $chosen_shipping_methods );
		WC()->session->set( 'chosen_payment_method', $posted_data['payment_method'] );

		$this->validate_checkout( $posted_data, $errors );
		$error_messages = $errors->get_error_messages();
		if ( ! empty( $error_messages ) ) {
			foreach ( $error_messages as $message ) {
				wc_add_notice( $message, 'error' );
			}
				echo $this->send_ajax_failure_response();

		} else {
			$response = array(
				'result' => 'success',
			);

			/** Comment
			unset( WC()->session->refresh_totals, WC()->session->reload_checkout );. */
		}

		echo wp_send_json( $response );
		die();

	}

	/**
	 * Validates that the checkout has enough info to proceed.
	 *
	 * @since  3.0.0
	 * @param  array    $data   An array of posted data.
	 * @param  WP_Error $errors Validation errors.
	 */
	protected function validate_checkout( &$data, &$errors ) {
		$this->validate_posted_data( $data, $errors );
		WC()->checkout->check_cart_items();

		if ( empty( $data['woocommerce_checkout_update_totals'] ) && empty( $data['terms'] ) && ! empty( $_POST['terms-field'] ) ) {
			$errors->add( 'terms', __( 'Please read and accept the terms and conditions to proceed with your order.', 'woocommerce' ) );
		}

		if ( WC()->cart->needs_shipping() ) {
			$shipping_country = WC()->customer->get_shipping_country();

			if ( empty( $shipping_country ) ) {
				$errors->add( 'shipping', __( 'Please enter an address to continue.', 'woocommerce' ) );
			} elseif ( ! in_array( WC()->customer->get_shipping_country(), array_keys( WC()->countries->get_shipping_countries() ), true ) ) {
				/* translators: %s: shipping location */
				$errors->add( 'shipping', sprintf( __( 'Unfortunately <strong>we do not ship %s</strong>. Please enter an alternative shipping address.', 'woocommerce' ), WC()->countries->shipping_to_prefix() . ' ' . WC()->customer->get_shipping_country() ) );
			} else {
				$chosen_shipping_methods = WC()->session->get( 'chosen_shipping_methods' );

				foreach ( WC()->shipping()->get_packages() as $i => $package ) {
					if ( ! isset( $chosen_shipping_methods[ $i ], $package['rates'][ $chosen_shipping_methods[ $i ] ] ) ) {
						$errors->add( 'shipping', __( 'No shipping method has been selected. Please double check your address, or contact us if you need any help.', 'woocommerce' ) );
					}
				}
			}
		}

		do_action( 'woocommerce_after_checkout_validation', $data, $errors );
	}

	/**
	 * See if a fieldset should be skipped.
	 *
	 * @since 3.0.0
	 * @param string $fieldset_key Fieldset key.
	 * @param array  $data         Posted data.
	 * @return bool
	 */
	protected function maybe_skip_fieldset( $fieldset_key, $data ) {
		if ( 'shipping' === $fieldset_key && ( ! $data['ship_to_different_address'] || ! WC()->cart->needs_shipping_address() ) ) {
			return true;
		}

		if ( 'account' === $fieldset_key && ( is_user_logged_in() || ( ! WC()->checkout->is_registration_required() && empty( $data['createaccount'] ) ) ) ) {
			return true;
		}

		return false;
	}

	/**
	 * Validates the posted checkout data based on field properties.
	 *
	 * @since  3.0.0
	 * @param  array    $data   An array of posted data.
	 * @param  WP_Error $errors Validation error.
	 */
	protected function validate_posted_data( &$data, &$errors ) {
		foreach ( WC()->checkout->get_checkout_fields() as $fieldset_key => $fieldset ) {

			$validate_fieldset = true;

			if ( $this->maybe_skip_fieldset( $fieldset_key, $data ) ) {
				$validate_fieldset = false;
			}

			foreach ( $fieldset as $key => $field ) {
				if ( ! isset( $data[ $key ] ) ) {
					continue;
				}
				$required    = ! empty( $field['required'] );
				$format      = array_filter( isset( $field['validate'] ) ? (array) $field['validate'] : array() );
				$field_label = isset( $field['label'] ) ? $field['label'] : '';

				switch ( $fieldset_key ) {
					case 'shipping':
						/* translators: %s: field name */
						$field_label = sprintf( __( 'Shipping %s', 'woocommerce' ), $field_label );
						break;
					case 'billing':
						/* translators: %s: field name */
						$field_label = sprintf( __( 'Billing %s', 'woocommerce' ), $field_label );
						break;
				}

				if ( in_array( 'postcode', $format, true ) ) {
					$country      = isset( $data[ $fieldset_key . '_country' ] ) ? $data[ $fieldset_key . '_country' ] : WC()->customer->{"get_{$fieldset_key}_country"}();
					$data[ $key ] = wc_format_postcode( $data[ $key ], $country );

					if ( $validate_fieldset && '' !== $data[ $key ] && ! WC_Validation::is_postcode( $data[ $key ], $country ) ) {
						switch ( $country ) {
							case 'IE':
								/* translators: %1$s: field name, %2$s finder.eircode.ie URL */
								$postcode_validation_notice = sprintf( __( '%1$s is not valid. You can look up the correct Eircode <a target="_blank" href="%2$s">here</a>.', 'woocommerce' ), '<strong>' . esc_html( $field_label ) . '</strong>', 'https://finder.eircode.ie' );
								break;
							default:
								/* translators: %s: field name */
								$postcode_validation_notice = sprintf( __( '%s is not a valid postcode / ZIP.', 'woocommerce' ), '<strong>' . esc_html( $field_label ) . '</strong>' );
						}
						$errors->add( 'validation', apply_filters( 'woocommerce_checkout_postcode_validation_notice', $postcode_validation_notice, $country, $data[ $key ] ) );
					}
				}

				if ( in_array( 'phone', $format, true ) ) {
					if ( $validate_fieldset && '' !== $data[ $key ] && ! WC_Validation::is_phone( $data[ $key ] ) ) {
						/* translators: %s: phone number */
						$errors->add( 'validation', sprintf( __( '%s is not a valid phone number.', 'woocommerce' ), '<strong>' . esc_html( $field_label ) . '</strong>' ) );
					}
				}

				if ( in_array( 'email', $format, true ) && '' !== $data[ $key ] ) {
					$email_is_valid = is_email( $data[ $key ] );
					$data[ $key ]   = sanitize_email( $data[ $key ] );

					if ( $validate_fieldset && ! $email_is_valid ) {
						/* translators: %s: email address */
						$errors->add( 'validation', sprintf( __( '%s is not a valid email address.', 'woocommerce' ), '<strong>' . esc_html( $field_label ) . '</strong>' ) );
						continue;
					}
				}

				if ( '' !== $data[ $key ] && in_array( 'state', $format, true ) ) {
					$country      = isset( $data[ $fieldset_key . '_country' ] ) ? $data[ $fieldset_key . '_country' ] : WC()->customer->{"get_{$fieldset_key}_country"}();
					$valid_states = WC()->countries->get_states( $country );

					if ( ! empty( $valid_states ) && is_array( $valid_states ) && count( $valid_states ) > 0 ) {
						$valid_state_values = array_map( 'wc_strtoupper', array_flip( array_map( 'wc_strtoupper', $valid_states ) ) );
						$data[ $key ]       = wc_strtoupper( $data[ $key ] );

						if ( isset( $valid_state_values[ $data[ $key ] ] ) ) {
							// With this part we consider state value to be valid as well, convert it to the state key for the valid_states check below.
							$data[ $key ] = $valid_state_values[ $data[ $key ] ];
						}

						if ( $validate_fieldset && ! in_array( $data[ $key ], $valid_state_values, true ) ) {
							/* translators: 1: state field 2: valid states */
							$errors->add( 'validation', sprintf( __( '%1$s is not valid. Please enter one of the following: %2$s', 'woocommerce' ), '<strong>' . esc_html( $field_label ) . '</strong>', implode( ', ', $valid_states ) ) );
						}
					}
				}

				if ( $validate_fieldset && $required && '' === $data[ $key ] ) {
					/* translators: %s: field name */
					$errors->add( 'required-field', apply_filters( 'woocommerce_checkout_required_field_notice', sprintf( __( '%s is a required field.', 'woocommerce' ), '<strong>' . esc_html( $field_label ) . '</strong>' ), $field_label ) );
				}
			}
		}
	}

	/**
	 * If checkout failed during an AJAX call, send failure response.
	 */
	protected function send_ajax_failure_response() {
		if ( is_ajax() ) {
			// Only print notices if not reloading the checkout, otherwise they're lost in the page reload.
			if ( ! isset( WC()->session->reload_checkout ) ) {
				$messages = wc_print_notices( true );
			}

			$response = array(
				'result'   => 'failure',
				'messages' => isset( $messages ) ? $messages : '',
				'refresh'  => isset( WC()->session->refresh_totals ),
				'reload'   => isset( WC()->session->reload_checkout ),
			);

			unset( WC()->session->refresh_totals, WC()->session->reload_checkout );

			wp_send_json( $response );
		}
	}

	/**
	 *  Add to cart.
	 */
	public function wcf_add_pre_checkout_product() {

		$nonce = filter_input( INPUT_POST, 'security', FILTER_SANITIZE_STRING );

		if ( ! wp_verify_nonce( $nonce, 'wcf_pre_checkout_offer' ) ) {

			$data = array(
				'error'   => true,
				'message' => __( 'Product not added in the cart.', 'cartflows-pro' ),
			);

			echo wp_send_json( $data );
			wp_die();
		}

		$pre_checkout_offer_price   = '';
		$checkout_id                = isset( $_POST['checkout_id'] ) ? intval( $_POST['checkout_id'] ) : 0;
		$pre_checkout_offer_product = get_post_meta( $checkout_id, 'wcf-pre-checkout-offer-product', true );
		$product_quantity           = isset( $_POST['product_quantity'] ) ? intval( $_POST['product_quantity'] ) : '';
		$discount_type              = get_post_meta( $checkout_id, 'wcf-pre-checkout-offer-discount', true );
		$discount_value             = floatval( get_post_meta( $checkout_id, 'wcf-pre-checkout-offer-discount-value', true ) );

		if ( isset( $pre_checkout_offer_product ) && ! empty( $pre_checkout_offer_product ) ) {

			$product_id = $pre_checkout_offer_product[0];
		} else {
			$data = array(
				'error'   => true,
				'message' => __( 'Oops, can\'t add the product to the cart', 'cartflows-pro' ),
			);
			echo wp_send_json( $data );
			wp_die();
		}

		$_product = wc_get_product( $product_id );

		if ( ! $_product ) {
			$data = array(
				'error'   => true,
				'message' => __( 'Oops, can\'t add the product to the cart', 'cartflows-pro' ),
			);
			echo wp_send_json( $data );
			wp_die();
		}

		if ( $_product->is_type( 'variable' ) ) {

			$default_attributes = $_product->get_default_attributes();

			if ( ! empty( $default_attributes ) ) {

				foreach ( $_product->get_children() as $c_in => $variation_id ) {