<?php
/**
 * WooCommerce Order and Event Hooks for AIsoule.
 *
 * @package AIsoule_WhatsApp_WooCommerce
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class AIsoule_WooCommerce_Hooks {

	private static $instance = null;

	public static function instance() {
		if ( is_null( self::$instance ) ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	private function __construct() {
		// Order status change hooks
		add_action( 'woocommerce_checkout_order_processed', array( $this, 'on_order_created' ), 20, 3 );
		add_action( 'woocommerce_order_status_processing', array( $this, 'on_order_processing' ), 20, 2 );
		add_action( 'woocommerce_order_status_completed', array( $this, 'on_order_completed' ), 20, 2 );
		add_action( 'woocommerce_order_status_cancelled', array( $this, 'on_order_cancelled' ), 20, 2 );

		// Checkout script enqueue & AJAX abandoned cart capture
		add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_checkout_scripts' ) );
		add_action( 'wp_ajax_aisoule_capture_cart', array( $this, 'ajax_capture_cart' ) );
		add_action( 'wp_ajax_nopriv_aisoule_capture_cart', array( $this, 'ajax_capture_cart' ) );
	}

	/**
	 * Hook: Order Created / Checkout processed.
	 */
	public function on_order_created( $order_id, $posted_data = array(), $order = null ) {
		$options = get_option( 'aisoule_whatsapp_settings', array() );
		if ( empty( $options['notify_new_order'] ) ) {
			return;
		}

		if ( ! $order && function_exists( 'wc_get_order' ) ) {
			$order = wc_get_order( $order_id );
		}

		if ( ! $order ) {
			return;
		}

		$payload = $this->build_order_payload( $order, 'order_created' );
		AIsoule_API::instance()->send_event( 'order_created', $payload );
	}

	/**
	 * Hook: Order status changed to processing.
	 */
	public function on_order_processing( $order_id, $order = null ) {
		$options = get_option( 'aisoule_whatsapp_settings', array() );
		if ( empty( $options['notify_processing'] ) ) {
			return;
		}

		if ( ! $order && function_exists( 'wc_get_order' ) ) {
			$order = wc_get_order( $order_id );
		}

		if ( ! $order ) {
			return;
		}

		$payload = $this->build_order_payload( $order, 'order_processing' );
		AIsoule_API::instance()->send_event( 'order_processing', $payload );
	}

	/**
	 * Hook: Order status changed to completed.
	 */
	public function on_order_completed( $order_id, $order = null ) {
		$options = get_option( 'aisoule_whatsapp_settings', array() );
		if ( empty( $options['notify_completed'] ) ) {
			return;
		}

		if ( ! $order && function_exists( 'wc_get_order' ) ) {
			$order = wc_get_order( $order_id );
		}

		if ( ! $order ) {
			return;
		}

		$payload = $this->build_order_payload( $order, 'order_completed' );
		AIsoule_API::instance()->send_event( 'order_completed', $payload );
	}

	/**
	 * Hook: Order status changed to cancelled.
	 */
	public function on_order_cancelled( $order_id, $order = null ) {
		$options = get_option( 'aisoule_whatsapp_settings', array() );
		if ( empty( $options['notify_cancelled'] ) ) {
			return;
		}

		if ( ! $order && function_exists( 'wc_get_order' ) ) {
			$order = wc_get_order( $order_id );
		}

		if ( ! $order ) {
			return;
		}

		$payload = $this->build_order_payload( $order, 'order_cancelled' );
		AIsoule_API::instance()->send_event( 'order_cancelled', $payload );
	}

	/**
	 * Extract and serialize order data for AIsoule.
	 */
	private function build_order_payload( $order, $event_type ) {
		$items = array();
		foreach ( $order->get_items() as $item_id => $item ) {
			$product = $item->get_product();
			$items[] = array(
				'id'       => $item_id,
				'name'     => $item->get_name(),
				'quantity' => $item->get_quantity(),
				'subtotal' => $item->get_subtotal(),
				'total'    => $item->get_total(),
				'sku'      => $product ? $product->get_sku() : '',
			);
		}

		$billing_phone = preg_replace( '/[^0-9+]/', '', $order->get_billing_phone() );

		return array(
			'event_type'      => $event_type,
			'order_id'        => $order->get_id(),
			'order_number'    => $order->get_order_number(),
			'status'          => $order->get_status(),
			'currency'        => $order->get_currency(),
			'total'           => (float) $order->get_total(),
			'shipping_total'  => (float) $order->get_shipping_total(),
			'discount_total'  => (float) $order->get_discount_total(),
			'payment_method'  => $order->get_payment_method_title(),
			'customer'        => array(
				'id'         => $order->get_customer_id(),
				'first_name' => $order->get_billing_first_name(),
				'last_name'  => $order->get_billing_last_name(),
				'email'      => $order->get_billing_email(),
				'phone'      => $billing_phone,
				'city'       => $order->get_billing_city(),
				'country'    => $order->get_billing_country(),
			),
			'items'           => $items,
			'checkout_url'    => $order->get_checkout_order_received_url(),
			'created_at'      => $order->get_date_created() ? $order->get_date_created()->date( 'c' ) : gmdate( 'c' ),
		);
	}

	/**
	 * Enqueue checkout abandoned cart listener script.
	 */
	public function enqueue_checkout_scripts() {
		if ( ! function_exists( 'is_checkout' ) || ! is_checkout() ) {
			return;
		}

		$options = get_option( 'aisoule_whatsapp_settings', array() );
		if ( empty( $options['abandoned_cart_enabled'] ) ) {
			return;
		}

		wp_enqueue_script(
			'aisoule-checkout',
			AISOULE_PLUGIN_URL . 'assets/js/aisoule-checkout.js',
			array( 'jquery' ),
			AISOULE_VERSION,
			true
		);

		wp_localize_script(
			'aisoule-checkout',
			'aisoule_vars',
			array(
				'ajax_url' => admin_url( 'admin-ajax.php' ),
				'nonce'    => wp_create_nonce( 'aisoule_checkout_nonce' ),
			)
		);
	}

	/**
	 * AJAX endpoint to capture phone number on checkout blur.
	 */
	public function ajax_capture_cart() {
		check_ajax_referer( 'aisoule_checkout_nonce', 'nonce' );

		$phone = isset( $_POST['phone'] ) ? sanitize_text_field( wp_unslash( $_POST['phone'] ) ) : '';
		$email = isset( $_POST['email'] ) ? sanitize_email( wp_unslash( $_POST['email'] ) ) : '';
		$name  = isset( $_POST['name'] ) ? sanitize_text_field( wp_unslash( $_POST['name'] ) ) : '';

		if ( empty( $phone ) && empty( $email ) ) {
			wp_send_json_error( array( 'message' => 'No contact provided' ) );
		}

		if ( function_exists( 'WC' ) && WC()->cart ) {
			$cart_items = array();
			foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
				$_product     = apply_filters( 'woocommerce_cart_item_product', $cart_item['data'], $cart_item, $cart_item_key );
				$cart_items[] = array(
					'product_id' => $cart_item['product_id'],
					'name'       => $_product ? $_product->get_name() : '',
					'quantity'   => $cart_item['quantity'],
					'subtotal'   => (float) $cart_item['line_subtotal'],
				);
			}

			$payload = array(
				'customer'    => array(
					'phone' => preg_replace( '/[^0-9+]/', '', $phone ),
					'email' => $email,
					'name'  => $name,
				),
				'cart_total'  => (float) WC()->cart->total,
				'items'       => $cart_items,
				'recovery_url'=> wc_get_checkout_url(),
			);

			AIsoule_API::instance()->send_event( 'abandoned_cart', $payload );
		}

		wp_send_json_success( array( 'status' => 'captured' ) );
	}
}