<?php

defined('ABSPATH') or exit;

use Automattic\WooCommerce\Blocks\Package;
use Automattic\WooCommerce\Blocks\Domain\Services\CheckoutFields;

/**
 * Class MC4WP_WooCommerce_Integration
 *
 * @ignore
 */
class MC4WP_WooCommerce_Integration extends MC4WP_Integration
{
	/**
	 * @var string
	 */
	public $name = 'WooCommerce Checkout';

	/**
	 * @var string
	 */
	public $description = "Subscribes people from WooCommerce's Checkout form or Checkout Block.";

	/**
	 * @var string[]
	 */
	public $checkbox_classes = array(
		'input-checkbox',
	);

	public $wrapper_classes = array(
		'form-row',
		'form-row-wide',
	);

	/**
	 * Add hooks
	 */
	public function add_hooks()
	{

		if (!$this->options['implicit']) {
			if ($this->options['position'] !== 'after_email_field') {
				// create hook name based on position setting
				$hook = $this->options['position'];

				// prefix hook with woocommerce_ if not already properly prefixed
				// note: we check for cfw_ prefix here to not override the Checkout for WC hook names
				if (strpos($hook, 'cfw_') !== 0 && strpos($hook, 'woocommerce_') !== 0) {
					$hook = "woocommerce_{$hook}";
				}

				add_action($hook, array($this, 'output_checkbox'), 20);
			} else {
				add_filter('woocommerce_form_field_email', array($this, 'add_checkbox_after_email_field'), 10, 4);
			}

			add_action('woocommerce_checkout_update_order_meta', array($this, 'save_woocommerce_checkout_checkbox_value'));

			// specific hooks for klarna
			add_filter('kco_create_order', array($this, 'add_klarna_field'));
			add_filter('klarna_after_kco_confirmation', array($this, 'subscribe_from_klarna_checkout'), 10, 2);

			// hooks for when using WooCommerce Checkout Block
			add_action('woocommerce_init', array($this, 'add_checkout_block_field'));
		}

		add_action('woocommerce_checkout_order_processed', array($this, 'subscribe_from_woocommerce_checkout'));
		add_action('woocommerce_store_api_checkout_order_processed', array($this, 'subscribe_from_woocommerce_checkout'));
	}

	/**
	 * Add default value for "position" setting
	 *
	 * @return array
	 */
	protected function get_default_options()
	{
		$defaults             = parent::get_default_options();
		$defaults['position'] = 'billing';
		return $defaults;
	}

	public function add_checkout_block_field() {
		// for compatibility with older WooCommerce versions
		// check if function exists before calling
		if (!function_exists('woocommerce_register_additional_checkout_field')) {
			return;
		}

		woocommerce_register_additional_checkout_field(
			array(
				'id' => 'mc4wp/optin',
				'location' => 'order',
				'type' => 'checkbox',
				'label' => $this->get_label_text(),
				'optionalLabel' => $this->get_label_text(),
			),
		);
	}

	public function add_klarna_field($create)
	{
		$create['options']['additional_checkbox']['text']     = $this->get_label_text();
		$create['options']['additional_checkbox']['checked']  = (bool) $this->options['precheck'];
		$create['options']['additional_checkbox']['required'] = false;
		return $create;
	}

	public function add_checkbox_after_email_field($field, $key, $args, $value)
	{
		if ($key !== 'billing_email') {
			return $field;
		}

		return $field . PHP_EOL . $this->get_checkbox_html();
	}

	/**
	 * @param int $order_id
	 */
	public function save_woocommerce_checkout_checkbox_value($order_id)
	{
		$order = wc_get_order($order_id);
		if (!$order) {
			return;
		}

		$order->update_meta_data('_mc4wp_optin', $this->checkbox_was_checked());
		$order->save();
	}

	/**
	 * {@inheritdoc}
	 *
	 * @param int|\WC_Order $order_id
	 * @return bool|mixed
	 */
	public function triggered($order_id = null)
	{
		if ($this->options['implicit']) {
			return true;
		}

		$order = wc_get_order($order_id);
		if (!$order) {
			return false;
		}

		// value from default checkout form (shortcode)
		$a = $order->get_meta('_mc4wp_optin');

		// alternatively, value from Checkout Block field
		$b = false;
		if (class_exists(Package::class) && class_exists(CheckoutFields::class)) {
			$checkout_fields = Package::container()->get(CheckoutFields::class);

			if (
				$checkout_fields

				&& method_exists($checkout_fields, 'get_field_from_object')
				// method was private in earlier versions of WooCommerce, so check if callable
				&& is_callable(array($checkout_fields, 'get_field_from_object'))
			) {
				$b = $checkout_fields->get_field_from_object('mc4wp/optin', $order, 'contact');
			}
		}

		return $a || $b;
	}

	public function subscribe_from_klarna_checkout($order_id, $klarna_order)
	{
		// $klarna_order is the returned object from Klarna
		if (false === (bool) $klarna_order['merchant_requested']['additional_checkbox']) {
			return;
		}

		$order = wc_get_order($order_id);
		if (!$order) {
			return;
		}

		// store _mc4wp_optin in order meta
		$order->update_meta_data('_mc4wp_optin', true);
		$order->save();

		// continue in regular subscribe flow
		$this->subscribe_from_woocommerce_checkout($order_id);
		return;
	}

	/**
	 * @param int|\WC_Order $order_id
	 * @return boolean
	 */
	public function subscribe_from_woocommerce_checkout($order_id)
	{
		if (!$this->triggered($order_id)) {
			return false;
		}

		$order = wc_get_order($order_id);
		if (!$order) {
			return false;
		}

		if (method_exists($order, 'get_billing_email')) {
			$data = array(
				'EMAIL' => $order->get_billing_email(),
				'NAME'  => "{$order->get_billing_first_name()} {$order->get_billing_last_name()}",
				'FNAME' => $order->get_billing_first_name(),
				'LNAME' => $order->get_billing_last_name(),
			);
		} else {
			// NOTE: for compatibility with WooCommerce < 3.0
			$data = array(
				'EMAIL' => $order->billing_email,
				'NAME'  => "{$order->billing_first_name} {$order->billing_last_name}",
				'FNAME' => $order->billing_first_name,
				'LNAME' => $order->billing_last_name,
			);
		}

		// TODO: add billing address fields, maybe by finding Mailchimp field of type "address"?

		return $this->subscribe($data, $order_id);
	}

	/**
	 * @return bool
	 */
	public function is_installed()
	{
		return class_exists('WooCommerce');
	}

	/**
	 * {@inheritdoc}
	 *
	 * @return string
	 */
	public function get_object_link($object_id)
	{
		return sprintf('<a href="%s">%s</a>', get_edit_post_link($object_id), sprintf(__('Order #%d', 'mailchimp-for-wp'), $object_id));
	}
}