<?php
/**
 * Main Plugin Class
 *
 * @package OrderCourier
 */

namespace Prologic365\OrderCourier;

defined( 'ABSPATH' ) || exit;

/**
 * Main plugin class.
 */
final class Plugin {
	/**
	 * Single instance of the plugin.
	 *
	 * @var Plugin
	 */
	private static $instance = null;

	/**
	 * Get plugin instance.
	 *
	 * @return Plugin
	 */
	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Constructor.
	 */
	private function __construct() {
		$this->includes();
		$this->init_hooks();
	}

	/**
	 * Include required files.
	 */
	private function includes() {
		// Core.
		require_once ORDERCOURIER_PATH . 'includes/class-install.php';
		require_once ORDERCOURIER_PATH . 'includes/class-settings.php';
		require_once ORDERCOURIER_PATH . 'includes/class-restrictions.php';
		require_once ORDERCOURIER_PATH . 'includes/class-message-builder.php';
		require_once ORDERCOURIER_PATH . 'includes/class-phone-validator.php';
		require_once ORDERCOURIER_PATH . 'includes/class-agent-manager.php';
		require_once ORDERCOURIER_PATH . 'includes/class-order-manager.php';
		require_once ORDERCOURIER_PATH . 'includes/class-rate-limiter.php';
		require_once ORDERCOURIER_PATH . 'includes/class-privacy.php';
		require_once ORDERCOURIER_PATH . 'includes/class-events.php';

		// Admin.
		if ( is_admin() ) {
			require_once ORDERCOURIER_PATH . 'includes/admin/class-admin.php';
		}

		// Frontend.
		if ( ! is_admin() || wp_doing_ajax() ) {
			require_once ORDERCOURIER_PATH . 'includes/frontend/class-frontend.php';
			require_once ORDERCOURIER_PATH . 'includes/frontend/class-widget.php';
		}

		// Blocks.
		require_once ORDERCOURIER_PATH . 'includes/blocks/class-blocks-integration.php';

		// Gateway.
		require_once ORDERCOURIER_PATH . 'includes/class-gateway.php';

		// REST API.
		require_once ORDERCOURIER_PATH . 'includes/api/class-rest-api.php';
		require_once ORDERCOURIER_PATH . 'includes/api/class-store-api.php';
	}

	/**
	 * Initialize hooks.
	 */
	private function init_hooks() {
		add_action( 'init', array( $this, 'init' ) );
		add_action( 'woocommerce_init', array( $this, 'woocommerce_init' ) );
		add_filter( 'woocommerce_payment_gateways', array( $this, 'add_gateway' ) );
		add_action( 'template_redirect', array( 'Prologic365\OrderCourier\Gateway', 'handle_redirect_bridge' ) );

		// Disable shipping for quote-only carts.
		add_filter( 'woocommerce_cart_needs_shipping', array( $this, 'cart_needs_shipping' ) );
		add_filter( 'woocommerce_product_needs_shipping', array( $this, 'product_needs_shipping' ), 10, 2 );

		// Send admin email when chat order is created.
		add_action( 'ordercourier_after_create_order', array( $this, 'maybe_send_admin_email' ), 10, 3 );
	}

	/**
	 * Initialize on init action.
	 */
	public function init() {
		// Register custom order status.
		Order_Manager::register_order_status();

		// Initialize privacy hooks.
		new Privacy();

		// Initialize events tracking.
		Events::init();

		/**
		 * Action fired when OrderCourier initializes.
		 * PRO and other add-ons can use this to register their features.
		 *
		 * @since 1.0.0
		 */
		do_action( 'ordercourier_init' );
	}

	/**
	 * Initialize when WooCommerce is ready.
	 */
	public function woocommerce_init() {
		// Initialize admin.
		if ( is_admin() ) {
			new Admin\Admin();
		}

		// Initialize frontend.
		if ( ! is_admin() || wp_doing_ajax() ) {
			new Frontend\Frontend();
			new Frontend\Widget();
		}

		// Initialize blocks integration.
		new Blocks\Blocks_Integration();

		// Initialize REST API.
		new API\REST_API();
		new API\Store_API();
	}

	/**
	 * Add payment gateway.
	 *
	 * @param array $gateways Payment gateways.
	 * @return array
	 */
	public function add_gateway( $gateways ) {
		$gateways[] = 'Prologic365\OrderCourier\Gateway';
		return $gateways;
	}

	/**
	 * Check if cart needs shipping.
	 * Returns false if the entire cart contains only quote items.
	 *
	 * @param bool $needs_shipping Whether cart needs shipping.
	 * @return bool
	 */
	public function cart_needs_shipping( $needs_shipping ) {
		if ( ! $needs_shipping ) {
			return false;
		}

		// Check if this is a quote-only cart.
		if ( WC()->cart && ! WC()->cart->is_empty() ) {
			$all_quote = true;

			foreach ( WC()->cart->get_cart() as $cart_item ) {
				$product = $cart_item['data'];
				if ( ! $product ) {
					continue;
				}

				// Check if product has a price.
				if ( '' !== $product->get_price() ) {
					// Also check if product is marked as quote-only (check parent for variations).
					$product_id = $product->is_type( 'variation' ) ? $product->get_parent_id() : $product->get_id();
					$quote_only = get_post_meta( $product_id, '_oc_quote_only', true );
					if ( 'yes' !== $quote_only ) {
						$all_quote = false;
						break;
					}
				}
			}

			// If all items are quote items, cart doesn't need shipping.
			if ( $all_quote ) {
				return false;
			}
		}

		return $needs_shipping;
	}

	/**
	 * Check if product needs shipping.
	 * Returns false for quote-only products.
	 *
	 * @param bool        $needs_shipping Whether product needs shipping.
	 * @param \WC_Product $product Product object.
	 * @return bool
	 */
	public function product_needs_shipping( $needs_shipping, $product ) {
		if ( ! $needs_shipping || ! $product ) {
			return $needs_shipping;
		}

		// Check if product has no price or is marked as quote-only (check parent for variations).
		if ( '' === $product->get_price() ) {
			return false;
		}

		$product_id = $product->is_type( 'variation' ) ? $product->get_parent_id() : $product->get_id();
		$quote_only = get_post_meta( $product_id, '_oc_quote_only', true );
		if ( 'yes' === $quote_only ) {
			return false;
		}

		return $needs_shipping;
	}

	/**
	 * Maybe send admin email notification when a chat order is created.
	 *
	 * @param int      $order_id Order ID.
	 * @param \WC_Cart $cart Cart object (optional).
	 * @param array    $data Additional data (optional).
	 */
	public function maybe_send_admin_email( $order_id, $cart = null, $data = array() ) {
		// Check if admin email is enabled.
		if ( 'yes' !== Settings::get( 'send_admin_email', 'no' ) ) {
			return;
		}

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

		// Avoid duplicate if WC New Order email is enabled and will trigger for this status.
		if ( $order->has_status( array( 'processing', 'on-hold', 'completed' ) ) ) {
			$mailer          = WC()->mailer();
			$new_order_email = isset( $mailer->emails['WC_Email_New_Order'] ) ? $mailer->emails['WC_Email_New_Order'] : null;

			if ( $new_order_email && $new_order_email->is_enabled() ) {
				return;
			}
		}

		// Get admin email.
		$admin_email = get_option( 'admin_email' );
		if ( empty( $admin_email ) ) {
			return;
		}

		// Suppress unused parameter warnings as they are required by the hook signature.
		unset( $cart, $data );

		// Build email subject and message.
		$site_name    = get_bloginfo( 'name' );
		$order_number = $order->get_order_number();
		/* translators: 1: Site name 2: Order number */
		$subject = sprintf( __( '[%1$s] New Chat Order (%2$s)', 'ordercourier' ), $site_name, $order_number );

		$customer_name = trim( $order->get_billing_first_name() . ' ' . $order->get_billing_last_name() );
		if ( empty( $customer_name ) ) {
			$customer_name = $order->get_billing_email() ? $order->get_billing_email() : $order->get_billing_phone();
		}
		if ( empty( $customer_name ) ) {
			$customer_name = __( 'Guest', 'ordercourier' );
		}

		$order_total    = html_entity_decode( wp_strip_all_tags( wc_price( $order->get_total() ) ), ENT_QUOTES | ENT_HTML5 );
		$order_edit_url = esc_url_raw( $order->get_edit_order_url() );
		$message        = sprintf(
			/* translators: 1: Order number, 2: Customer name, 3: Order total, 4: Order edit link */
			__(
				'A new order has been placed via chat:

Order #%1$s
Customer: %2$s
Total: %3$s

View order: %4$s',
				'ordercourier'
			),
			$order_number,
			$customer_name,
			$order_total,
			$order_edit_url
		);

		// Send email.
		wp_mail( $admin_email, $subject, $message );

		/**
		 * Action fired after admin email is sent.
		 *
		 * @since 1.0.0
		 * @param int       $order_id Order ID.
		 * @param \WC_Order $order Order object.
		 * @param string    $admin_email Admin email address.
		 */
		do_action( 'ordercourier_admin_email_sent', $order_id, $order, $admin_email );
	}
}