<?php
/**
 * Cart integration: quote button, locked cart while paying an accepted quote.
 *
 * @package Devis_Quote_Request
 */

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

class DevisQR_Cart {

	public function __construct() {
		// Quote button (classic cart). Position is filterable from a theme; a shortcode covers block carts.
		add_action( 'init', array( $this, 'register_button_hook' ) );
		add_shortcode( 'devisqr_button', array( $this, 'shortcode_button' ) );

		add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_assets' ) );
		add_filter( 'body_class', array( $this, 'body_class' ) );

		// AJAX fallbacks (when REST is blocked by a security plugin).
		add_action( 'wp_ajax_devisqr_submit_quote', array( $this, 'ajax_submit_quote' ) );
		add_action( 'wp_ajax_devisqr_add_to_cart', array( $this, 'ajax_add_to_cart' ) );

		// Quote badges + locked cart.
		add_filter( 'woocommerce_get_item_data', array( $this, 'display_quote_badge' ), 10, 2 );
		add_filter( 'woocommerce_cart_item_remove_link', array( $this, 'lock_remove_link' ), 10, 2 );
		add_filter( 'woocommerce_cart_item_quantity', array( $this, 'lock_quantity' ), 10, 3 );
		add_action( 'woocommerce_before_cart', array( $this, 'show_quote_cart_notice' ) );
		add_action( 'woocommerce_before_checkout_form', array( $this, 'show_quote_cart_notice' ) );
		add_filter( 'woocommerce_cart_item_class', array( $this, 'add_quote_item_class' ), 10, 3 );
		add_filter( 'woocommerce_update_cart_validation', array( $this, 'prevent_quantity_change' ), 10, 4 );
		add_action( 'woocommerce_after_cart_item_quantity_update', array( $this, 'lock_quantity_after_update' ), 10, 4 );
		add_action( 'woocommerce_cart_item_removed', array( $this, 'restore_removed_quote_item' ), 10, 2 );
		add_filter( 'woocommerce_add_to_cart_validation', array( $this, 'block_add_to_cart_with_quote' ), 10, 2 );
		add_filter( 'woocommerce_coupons_enabled', array( $this, 'disable_coupons_when_locked' ) );

		// Frozen quote prices.
		add_action( 'woocommerce_before_calculate_totals', array( $this, 'apply_quote_prices' ), 99 );
		add_filter( 'woocommerce_cart_item_price', array( $this, 'display_quote_price' ), 99, 3 );

		// Order placed from a quote: link at checkout, convert once the order is paid / confirmed.
		add_action( 'woocommerce_checkout_order_processed', array( $this, 'convert_quote_on_order' ), 10, 3 );
		add_action( 'woocommerce_store_api_checkout_order_processed', array( $this, 'convert_quote_on_order_store_api' ), 10, 1 );
		add_action( 'woocommerce_checkout_create_order_line_item', array( $this, 'save_quote_meta_to_order_item' ), 10, 4 );
		add_action( 'woocommerce_order_status_changed', array( $this, 'maybe_convert_on_status' ), 10, 4 );
	}

	/**
	 * Attach the button to the configured (and filterable) cart hook.
	 */
	public function register_button_hook() {
		$map = array(
			'after_totals'    => array( 'woocommerce_after_cart_totals', 10 ),
			'before_checkout' => array( 'woocommerce_proceed_to_checkout', 5 ),
			'after_checkout'  => array( 'woocommerce_proceed_to_checkout', 30 ),
			'top'             => array( 'woocommerce_before_cart', 10 ),
		);
		$pos  = DevisQR_Settings::get( 'cart_button_position' );
		$hook = isset( $map[ $pos ] ) ? $map[ $pos ][0] : '';
		$prio = isset( $map[ $pos ] ) ? $map[ $pos ][1] : 10;

		/**
		 * Filter the WooCommerce hook used to print the cart button ('' = none, use the shortcode).
		 *
		 * @param string $hook Hook name.
		 * @param string $pos  Configured position.
		 */
		$hook = apply_filters( 'devisqr_cart_button_hook', $hook, $pos );
		if ( $hook ) {
			add_action( $hook, array( $this, 'render_quote_button' ), $prio );
		}
	}

	/* ------------------------------------------------------------------ */
	/*  Assets                                                             */
	/* ------------------------------------------------------------------ */

	/**
	 * Enqueue cart assets.
	 */
	public function enqueue_assets() {
		if ( ! is_cart() && ! is_checkout() ) {
			return;
		}
		if ( ! is_cart() ) {
			self::enqueue_style();
			return;
		}
		self::enqueue_front_assets();

		// Block cart: render the button through the WooCommerce Blocks slot.
		if ( $this->cart_page_uses_block() && wp_script_is( 'wc-blocks-checkout', 'registered' ) ) {
			wp_enqueue_script( 'devisqr-cart-block', DEVISQR_PLUGIN_URL . 'assets/js/devisqr-cart-block.js', array( 'devisqr-cart', 'wc-blocks-checkout', 'wp-plugins', 'wp-element', 'wp-i18n' ), DEVISQR_VERSION, true );
			wp_set_script_translations( 'devisqr-cart-block', 'nuxwp-devis', DEVISQR_PLUGIN_DIR . 'languages' );
		}
	}

	/**
	 * Stylesheet + admin-driven inline CSS.
	 */
	public static function enqueue_style() {
		if ( wp_style_is( 'devisqr-cart', 'enqueued' ) ) {
			return;
		}
		wp_enqueue_style( 'devisqr-cart', DEVISQR_PLUGIN_URL . 'assets/css/devisqr-cart.css', array(), DEVISQR_VERSION );
		wp_add_inline_style( 'devisqr-cart', DevisQR_Buttons::inline_css() );
	}

	/**
	 * Style + shared script + localized data (cart page and product page).
	 */
	public static function enqueue_front_assets() {
		self::enqueue_style();
		if ( wp_script_is( 'devisqr-cart', 'enqueued' ) ) {
			return;
		}

		wp_enqueue_script( 'devisqr-cart', DEVISQR_PLUGIN_URL . 'assets/js/devisqr-cart.js', array( 'jquery', 'wp-i18n' ), DEVISQR_VERSION, true );
		wp_set_script_translations( 'devisqr-cart', 'nuxwp-devis', DEVISQR_PLUGIN_DIR . 'languages' );

		$settings  = DevisQR_Settings::resolved();
		$min_total = DevisQR_Helpers::min_cart_total();

		wp_localize_script( 'devisqr-cart', 'devisqrCart', array(
			'restUrl'           => esc_url_raw( rest_url( DevisQR_API::NAMESPACE . '/' ) ),
			'nonce'             => wp_create_nonce( 'wp_rest' ),
			'ajaxUrl'           => admin_url( 'admin-ajax.php' ),
			'ajaxNonce'         => wp_create_nonce( 'devisqr_submit' ),
			'minTotal'          => $min_total,
			'minTotalText'      => $min_total > 0 ? DevisQR_Helpers::price_text( $min_total ) : '',
			'cartButtonEnabled' => (bool) DevisQR_Settings::get( 'cart_button_enabled' ),
			'cartWrapClass'     => DevisQR_Buttons::wrap_class( 'cart', 'devisqr-quote-wrap--block' ),
			'cartButtonText'    => DevisQR_Buttons::label( 'cart' ),
			'currency'          => DevisQR_Helpers::js_currency(),
			'textOverrides'     => DevisQR_Texts::overrides_for_js(),
			'isLoggedIn'        => is_user_logged_in(),
			'userAccess'        => DevisQR_Helpers::user_access(),
			'loginUrl'          => wc_get_page_permalink( 'myaccount' ),
			'cartUrl'           => wc_get_cart_url(),
			'accountUrl'        => wc_get_account_endpoint_url( DevisQR_Settings::account_endpoint() ),
			'messageEnabled'    => ! empty( $settings['customer_message_enabled'] ),
			'deniedHtml'        => wp_kses_post(
				__( 'Your account is not allowed to request quotes.', 'nuxwp-devis' ) . ' ' . DevisQR_Helpers::contact_link()
			),
		) );
	}

	/**
	 * Is the cart page built with the Cart block (vs the [woocommerce_cart] shortcode)?
	 *
	 * @return bool
	 */
	private function cart_page_uses_block() {
		if ( function_exists( 'has_block' ) && has_block( 'woocommerce/cart' ) ) {
			return true;
		}
		$cart_page_id = wc_get_page_id( 'cart' );
		return $cart_page_id > 0 && function_exists( 'has_block' ) && has_block( 'woocommerce/cart', $cart_page_id );
	}

	/**
	 * Body class while the cart holds an accepted quote.
	 *
	 * @param array $classes Classes.
	 * @return array
	 */
	public function body_class( $classes ) {
		if ( ( is_cart() || is_checkout() ) && self::cart_has_quote_items() ) {
			$classes[] = 'devisqr-locked-cart';
		}
		return $classes;
	}

	/* ------------------------------------------------------------------ */
	/*  Button                                                             */
	/* ------------------------------------------------------------------ */

	/**
	 * Shortcode [devisqr_button].
	 *
	 * @return string
	 */
	public function shortcode_button() {
		if ( ! function_exists( 'WC' ) || ! WC()->cart ) {
			return '';
		}
		self::enqueue_front_assets();
		ob_start();
		$this->render_quote_button();
		return ob_get_clean();
	}

	/**
	 * Render the quote button (classic cart).
	 */
	public function render_quote_button() {
		static $rendered = false;
		if ( $rendered || ! DevisQR_Settings::get( 'cart_button_enabled' ) ) {
			return;
		}
		if ( ! WC()->cart || WC()->cart->is_empty() || self::cart_has_quote_items() ) {
			return;
		}
		$rendered = true;

		$cart_total = (float) WC()->cart->get_subtotal() + (float) WC()->cart->get_subtotal_tax();
		$min_total  = DevisQR_Helpers::min_cart_total();
		$enabled    = $min_total <= 0 || $cart_total >= $min_total;

		DevisQR_Buttons::render( 'cart', $enabled, array( 'data-min-total' => $min_total ) );
	}

	/* ------------------------------------------------------------------ */
	/*  AJAX fallbacks                                                     */
	/* ------------------------------------------------------------------ */

	/**
	 * AJAX: submit (mirrors the REST callback).
	 */
	public function ajax_submit_quote() {
		check_ajax_referer( 'devisqr_submit', 'nonce' );

		if ( ! is_user_logged_in() ) {
			wp_send_json_error( array( 'message' => __( 'You must be logged in.', 'nuxwp-devis' ) ) );
		}

		$request = new WP_REST_Request( 'POST' );
		if ( isset( $_POST['customer_note'] ) ) {
			$request->set_param( 'customer_note', sanitize_textarea_field( wp_unslash( $_POST['customer_note'] ) ) );
		}

		$api    = new DevisQR_API();
		$result = $api->submit_quote( $request );

		if ( is_wp_error( $result ) ) {
			wp_send_json_error( array( 'message' => $result->get_error_message() ) );
		}
		wp_send_json_success( $result->get_data() );
	}

	/**
	 * AJAX: load an accepted quote into the cart.
	 */
	public function ajax_add_to_cart() {
		check_ajax_referer( 'devisqr_submit', 'nonce' );

		if ( ! is_user_logged_in() ) {
			wp_send_json_error( array( 'message' => __( 'You must be logged in.', 'nuxwp-devis' ) ) );
		}

		$quote_id = isset( $_POST['quote_id'] ) ? absint( wp_unslash( $_POST['quote_id'] ) ) : 0;
		$quote    = $quote_id ? DevisQR_Database::get_quote( $quote_id ) : null;

		if ( ! $quote || (int) $quote->user_id !== get_current_user_id() ) {
			wp_send_json_error( array( 'message' => __( 'Quote not found.', 'nuxwp-devis' ) ) );
		}
		if ( 'converted' === $quote->status ) {
			wp_send_json_error( array( 'message' => __( 'This quote has already been converted into an order.', 'nuxwp-devis' ) ) );
		}
		if ( 'accepted' !== $quote->status ) {
			wp_send_json_error( array( 'message' => __( 'This quote has not been accepted yet.', 'nuxwp-devis' ) ) );
		}
		if ( DevisQR_Helpers::is_expired( $quote ) ) {
			DevisQR_Database::update_quote( $quote->id, array( 'status' => 'expired' ) );
			wp_send_json_error( array( 'message' => __( 'This quote has expired. Please submit a new quote request.', 'nuxwp-devis' ) ) );
		}

		$added = self::load_quote_into_cart( $quote );
		if ( is_wp_error( $added ) ) {
			wp_send_json_error( array( 'message' => $added->get_error_message() ) );
		}

		wp_send_json_success( array(
			'success'      => true,
			/* translators: %d: number of products */
			'message'      => sprintf( _n( '%d product added to the cart.', '%d products added to the cart.', $added, 'nuxwp-devis' ), $added ),
			'redirect_url' => wc_get_checkout_url(),
		) );
	}

	/**
	 * Empty the cart and load the quote lines with frozen prices.
	 *
	 * @param object $quote Quote row.
	 * @return int|WP_Error Number of lines added, or error (cart emptied) when a line could not be added.
	 */
	public static function load_quote_into_cart( $quote ) {
		$items = DevisQR_Database::get_quote_items( $quote->id );
		if ( empty( $items ) ) {
			return new WP_Error( 'empty_quote', __( 'This quote has no products.', 'nuxwp-devis' ), array( 'status' => 400 ) );
		}
		WC()->cart->empty_cart();
		wc_clear_notices();

		$added = 0;
		foreach ( $items as $item ) {
			$quantity  = (float) $item->quantity;
			$variation = array();
			if ( $item->meta_data ) {
				$meta = json_decode( $item->meta_data, true );
				if ( ! empty( $meta['variation'] ) ) {
					$variation = $meta['variation'];
				}
			}

			$cart_item_data = array(
				'devisqr_quote_id'       => (int) $quote->id,
				'devisqr_quote_number'   => $quote->quote_number,
				'devisqr_quote_price'    => (float) $item->line_total_ttc / max( $quantity, 1 ),
				'devisqr_quote_price_ht' => (float) $item->line_total_ht / max( $quantity, 1 ),
				'devisqr_quote_discount' => isset( $item->discount_percent ) ? (float) $item->discount_percent : 0,
				'devisqr_original_price' => (float) $item->unit_price_ttc,
				'devisqr_original_price_ht' => (float) $item->unit_price_ht,
			);

			if ( WC()->cart->add_to_cart( (int) $item->product_id, $quantity, (int) $item->variation_id, $variation, $cart_item_data ) ) {
				$added++;
			} else {
				// All or nothing: never let the customer pay a partial quote at negotiated prices.
				WC()->cart->empty_cart();
				wc_clear_notices();
				return new WP_Error(
					'cart_error',
					/* translators: 1: product name, 2: "contact us" */
					sprintf( __( '“%1$s” is no longer available in the requested quantity. Please %2$s so we can update your quote.', 'nuxwp-devis' ), $item->product_name, wp_strip_all_tags( DevisQR_Helpers::contact_link() ) ),
					array( 'status' => 409 )
				);
			}
		}
		return $added;
	}

	/* ------------------------------------------------------------------ */
	/*  Locked cart                                                        */
	/* ------------------------------------------------------------------ */

	/**
	 * Does the cart hold quote lines?
	 *
	 * @return bool
	 */
	public static function cart_has_quote_items() {
		if ( ! function_exists( 'WC' ) || ! WC()->cart ) {
			return false;
		}
		foreach ( WC()->cart->get_cart() as $item ) {
			if ( ! empty( $item['devisqr_quote_id'] ) ) {
				return true;
			}
		}
		return false;
	}

	/**
	 * Quote number found in the cart.
	 *
	 * @return string
	 */
	private function get_cart_quote_number() {
		foreach ( WC()->cart->get_cart() as $item ) {
			if ( ! empty( $item['devisqr_quote_number'] ) ) {
				return $item['devisqr_quote_number'];
			}
		}
		return '';
	}

	/**
	 * "Quotes cannot be modified" message with contact link.
	 *
	 * @return string HTML.
	 */
	private function locked_message() {
		return sprintf(
			/* translators: %s: "contact us" link */
			__( 'The products and quantities of a quote cannot be modified. For any change, please %s.', 'nuxwp-devis' ),
			DevisQR_Helpers::contact_link()
		);
	}

	/**
	 * Hard server-side quantity lock (classic form, Store API, third-party carts).
	 *
	 * @param string  $cart_item_key Key.
	 * @param float   $quantity      New qty.
	 * @param float   $old_quantity  Old qty.
	 * @param WC_Cart $cart          Cart.
	 */
	public function lock_quantity_after_update( $cart_item_key, $quantity, $old_quantity, $cart ) {
		if ( (float) $quantity === (float) $old_quantity ) {
			return;
		}
		if ( isset( $cart->cart_contents[ $cart_item_key ] ) && ! empty( $cart->cart_contents[ $cart_item_key ]['devisqr_quote_id'] ) ) {
			$cart->cart_contents[ $cart_item_key ]['quantity'] = $old_quantity;
			wc_add_notice( wp_kses_post( $this->locked_message() ), 'error' );
		}
	}

	/**
	 * Badges on quote lines.
	 *
	 * @param array $item_data Data.
	 * @param array $cart_item Cart item.
	 * @return array
	 */
	public function display_quote_badge( $item_data, $cart_item ) {
		if ( ! empty( $cart_item['devisqr_quote_number'] ) ) {
			$item_data[] = array(
				'key'   => __( 'Quote', 'nuxwp-devis' ),
				'value' => $cart_item['devisqr_quote_number'],
			);
		}
		if ( ! empty( $cart_item['devisqr_quote_discount'] ) && (float) $cart_item['devisqr_quote_discount'] > 0 ) {
			$value = '<span class="devisqr-discount-value">-' . esc_html( DevisQR_Helpers::percent_text( $cart_item['devisqr_quote_discount'] ) ) . '</span>';
			$orig_key = WC()->cart->display_prices_including_tax() ? 'devisqr_original_price' : 'devisqr_original_price_ht';
			if ( ! empty( $cart_item[ $orig_key ] ) && (float) $cart_item[ $orig_key ] > 0 ) {
				$value .= ' <span class="devisqr-discount-was">' . wc_price( (float) $cart_item[ $orig_key ] ) . '</span>';
			}
			$item_data[] = array(
				'key'     => __( 'Discount', 'nuxwp-devis' ),
				'value'   => $value,
				'display' => $value,
			);
		}
		return $item_data;
	}

	/**
	 * No remove link on quote lines.
	 *
	 * @param string $link          Link.
	 * @param string $cart_item_key Key.
	 * @return string
	 */
	public function lock_remove_link( $link, $cart_item_key ) {
		$cart = WC()->cart->get_cart();
		if ( isset( $cart[ $cart_item_key ] ) && ! empty( $cart[ $cart_item_key ]['devisqr_quote_id'] ) ) {
			return '';
		}
		return $link;
	}

	/**
	 * Read-only quantity on quote lines.
	 *
	 * @param string $product_quantity HTML.
	 * @param string $cart_item_key    Key.
	 * @param array  $cart_item        Item.
	 * @return string
	 */
	public function lock_quantity( $product_quantity, $cart_item_key, $cart_item ) {
		if ( ! empty( $cart_item['devisqr_quote_id'] ) ) {
			return '<span class="devisqr-locked-qty">' . esc_html( DevisQR_Helpers::qty_text( $cart_item['quantity'] ) ) . '</span>';
		}
		return $product_quantity;
	}

	/**
	 * Banner on cart/checkout when paying a quote.
	 */
	public function show_quote_cart_notice() {
		static $shown = false;
		if ( $shown || ! self::cart_has_quote_items() ) {
			return;
		}
		$shown = true;
		?>
		<div class="devisqr-cart-notice" role="status">
			<svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><circle cx="12" cy="12" r="10"></circle><line x1="12" y1="16" x2="12" y2="12"></line><line x1="12" y1="8" x2="12.01" y2="8"></line></svg>
			<span>
				<?php
				printf(
					/* translators: %s: quote number */
					esc_html__( 'This cart corresponds to quote %s.', 'nuxwp-devis' ),
					'<strong>' . esc_html( $this->get_cart_quote_number() ) . '</strong>'
				);
				echo ' ' . wp_kses_post( $this->locked_message() );
				?>
			</span>
		</div>
		<?php
	}

	/**
	 * CSS class on quote rows.
	 *
	 * @param string $class         Class.
	 * @param array  $cart_item     Item.
	 * @param string $cart_item_key Key.
	 * @return string
	 */
	public function add_quote_item_class( $class, $cart_item, $cart_item_key ) {
		if ( ! empty( $cart_item['devisqr_quote_id'] ) ) {
			$class .= ' devisqr-quote-item';
		}
		return $class;
	}

	/**
	 * Classic cart form: refuse quantity changes on quote lines.
	 *
	 * @param bool   $passed        Passed.
	 * @param string $cart_item_key Key.
	 * @param array  $values        Values.
	 * @param float  $quantity      Qty.
	 * @return bool
	 */
	public function prevent_quantity_change( $passed, $cart_item_key, $values, $quantity ) {
		$cart = WC()->cart->get_cart();
		if ( isset( $cart[ $cart_item_key ] ) && ! empty( $cart[ $cart_item_key ]['devisqr_quote_id'] ) ) {
			if ( (float) $quantity !== (float) $cart[ $cart_item_key ]['quantity'] ) {
				wc_add_notice( wp_kses_post( $this->locked_message() ), 'error' );
				return false;
			}
		}
		return $passed;
	}

	/**
	 * Put a removed quote line back.
	 *
	 * @param string  $cart_item_key Key.
	 * @param WC_Cart $cart          Cart.
	 */
	public function restore_removed_quote_item( $cart_item_key, $cart ) {
		$removed = $cart->removed_cart_contents;
		if ( isset( $removed[ $cart_item_key ] ) && ! empty( $removed[ $cart_item_key ]['devisqr_quote_id'] ) ) {
			$cart->restore_cart_item( $cart_item_key );
			wc_add_notice( wp_kses_post( $this->locked_message() ), 'error' );
		}
	}

	/**
	 * No new products while a quote is in the cart (except our own loader).
	 *
	 * @param bool $passed     Passed.
	 * @param int  $product_id Product.
	 * @return bool
	 */
	public function block_add_to_cart_with_quote( $passed, $product_id ) {
		if ( ! self::cart_has_quote_items() ) {
			return $passed;
		}
		if ( doing_action( 'wp_ajax_devisqr_add_to_cart' ) ) {
			return $passed;
		}
		if ( defined( 'REST_REQUEST' ) && REST_REQUEST ) {
			$route = isset( $GLOBALS['wp']->query_vars['rest_route'] ) ? (string) $GLOBALS['wp']->query_vars['rest_route'] : '';
			if ( '' === $route && isset( $_SERVER['REQUEST_URI'] ) ) {
				$route = sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) );
			}
			if ( false !== strpos( $route, DevisQR_API::NAMESPACE ) ) {
				return $passed;
			}
		}

		wc_add_notice(
			wp_kses_post(
				__( 'Your cart contains a quote being paid. You cannot add other products.', 'nuxwp-devis' ) . ' ' . $this->locked_message()
			),
			'error'
		);
		return false;
	}

	/**
	 * No coupons on a frozen quote.
	 *
	 * @param bool $enabled Enabled.
	 * @return bool
	 */
	public function disable_coupons_when_locked( $enabled ) {
		if ( is_admin() && ! wp_doing_ajax() ) {
			return $enabled;
		}
		return self::cart_has_quote_items() ? false : $enabled;
	}

	/* ------------------------------------------------------------------ */
	/*  Frozen prices                                                      */
	/* ------------------------------------------------------------------ */

	/**
	 * Apply the quote's unit prices.
	 *
	 * @param WC_Cart $cart Cart.
	 */
	public function apply_quote_prices( $cart ) {
		if ( is_admin() && ! defined( 'DOING_AJAX' ) ) {
			return;
		}
		foreach ( $cart->get_cart() as $cart_item ) {
			if ( empty( $cart_item['devisqr_quote_price'] ) ) {
				continue;
			}
			$price = (float) $cart_item['devisqr_quote_price'];
			if ( ! wc_prices_include_tax() ) {
				if ( ! empty( $cart_item['devisqr_quote_price_ht'] ) ) {
					$price = (float) $cart_item['devisqr_quote_price_ht'];
				} else {
					$rates = WC_Tax::get_rates( $cart_item['data']->get_tax_class() );
					$rate  = 0;
					foreach ( (array) $rates as $r ) {
						$rate += (float) $r['rate'];
					}
					$price = $price / ( 1 + $rate / 100 );
				}
			}
			$cart_item['data']->set_price( $price );
		}
	}

	/**
	 * Show was/now price on quote lines.
	 *
	 * @param string $price_html    HTML.
	 * @param array  $cart_item     Item.
	 * @param string $cart_item_key Key.
	 * @return string
	 */
	public function display_quote_price( $price_html, $cart_item, $cart_item_key ) {
		if ( empty( $cart_item['devisqr_quote_price'] ) ) {
			return $price_html;
		}
		$incl       = WC()->cart->display_prices_including_tax();
		$discounted = $incl ? (float) $cart_item['devisqr_quote_price'] : (float) ( isset( $cart_item['devisqr_quote_price_ht'] ) ? $cart_item['devisqr_quote_price_ht'] : $cart_item['devisqr_quote_price'] );
		if ( ! empty( $cart_item['devisqr_quote_discount'] ) && (float) $cart_item['devisqr_quote_discount'] > 0 ) {
			$original = ! empty( $cart_item['devisqr_original_price'] ) ? (float) $cart_item['devisqr_original_price'] : 0;
			if ( ! $incl && $original > 0 && ! empty( $cart_item['devisqr_original_price_ht'] ) ) {
				$original = (float) $cart_item['devisqr_original_price_ht'];
			}
			if ( $original > $discounted ) {
				return '<del class="devisqr-price-was">' . wc_price( $original ) . '</del> <ins class="devisqr-price-now">' . wc_price( $discounted ) . '</ins>';
			}
		}
		return wc_price( $discounted );
	}

	/* ------------------------------------------------------------------ */
	/*  Conversion                                                         */
	/* ------------------------------------------------------------------ */

	/**
	 * Classic checkout: mark quotes as converted.
	 *
	 * @param int      $order_id    Order ID.
	 * @param array    $posted_data Posted.
	 * @param WC_Order $order       Order.
	 */
	public function convert_quote_on_order( $order_id, $posted_data, $order ) {
		$this->convert_quotes_for_order( $order );
	}

	/**
	 * Block checkout (Store API).
	 *
	 * @param WC_Order $order Order.
	 */
	public function convert_quote_on_order_store_api( $order ) {
		$this->convert_quotes_for_order( $order );
	}

	/**
	 * At checkout: link the order to its quote(s). The status flips to "converted"
	 * only when the order is paid/confirmed (see maybe_convert_on_status), so a
	 * failed or abandoned payment leaves the quote payable.
	 *
	 * @param WC_Order $order Order.
	 */
	private function convert_quotes_for_order( $order ) {
		if ( ! $order instanceof WC_Order || ! WC()->cart ) {
			return;
		}
		$ids    = array();
		$number = '';
		foreach ( WC()->cart->get_cart() as $cart_item ) {
			if ( empty( $cart_item['devisqr_quote_id'] ) ) {
				continue;
			}
			$quote_id = (int) $cart_item['devisqr_quote_id'];
			if ( ! in_array( $quote_id, $ids, true ) ) {
				$ids[]  = $quote_id;
				$number = isset( $cart_item['devisqr_quote_number'] ) ? $cart_item['devisqr_quote_number'] : $number;
			}
		}
		if ( empty( $ids ) ) {
			return;
		}
		$order->update_meta_data( '_devisqr_quote_ids', $ids );
		if ( $number ) {
			$order->update_meta_data( '_devisqr_quote_number', $number );
		}
		$order->save();

		// Already paid/confirmed during checkout (e.g. free order, COD set to processing)?
		if ( $order->has_status( $this->converting_statuses() ) ) {
			$this->mark_converted( $order );
		}
	}

	/**
	 * Order statuses that confirm the order (quote → converted).
	 *
	 * @return array
	 */
	private function converting_statuses() {
		/**
		 * Filter the order statuses that mark the linked quote as converted.
		 *
		 * @param array $statuses Status slugs without wc- prefix.
		 */
		return (array) apply_filters( 'devisqr_converting_order_statuses', array( 'processing', 'completed', 'on-hold' ) );
	}

	/**
	 * Status change on an order linked to a quote.
	 *
	 * @param int      $order_id Order ID.
	 * @param string   $from     Old status.
	 * @param string   $to       New status.
	 * @param WC_Order $order    Order.
	 */
	public function maybe_convert_on_status( $order_id, $from, $to, $order ) {
		if ( ! $order instanceof WC_Order || ! in_array( $to, $this->converting_statuses(), true ) ) {
			return;
		}
		$this->mark_converted( $order );
	}

	/**
	 * Mark the order's quotes as converted (idempotent).
	 *
	 * @param WC_Order $order Order.
	 */
	private function mark_converted( $order ) {
		$ids = (array) $order->get_meta( '_devisqr_quote_ids' );
		foreach ( $ids as $quote_id ) {
			$quote = DevisQR_Database::get_quote( (int) $quote_id );
			if ( ! $quote || 'converted' === $quote->status ) {
				continue;
			}
			DevisQR_Database::update_quote( (int) $quote_id, array( 'status' => 'converted' ) );
			/**
			 * Fires when a quote is converted into a confirmed order.
			 *
			 * @param int      $quote_id Quote ID.
			 * @param WC_Order $order    Order.
			 */
			do_action( 'devisqr_quote_converted', (int) $quote_id, $order );
		}
	}

	/**
	 * Keep the quote reference on order lines.
	 *
	 * @param WC_Order_Item_Product $item          Item.
	 * @param string                $cart_item_key Key.
	 * @param array                 $values        Cart values.
	 * @param WC_Order              $order         Order.
	 */
	public function save_quote_meta_to_order_item( $item, $cart_item_key, $values, $order ) {
		if ( ! empty( $values['devisqr_quote_id'] ) ) {
			$item->add_meta_data( '_devisqr_quote_id', (int) $values['devisqr_quote_id'] );
			$item->add_meta_data( '_devisqr_quote_number', sanitize_text_field( $values['devisqr_quote_number'] ) );
		}
	}
}