<?php
/**
 * Services REST Controller
 *
 * Handles REST API endpoints for services.
 *
 * @package Magdev\WpBnb\Api\Controllers
 */

declare( strict_types=1 );

namespace Magdev\WpBnb\Api\Controllers;

use Magdev\WpBnb\PostTypes\Service;
use Magdev\WpBnb\Taxonomies\ServiceCategory;
use Magdev\WpBnb\Pricing\Calculator;
use WP_REST_Request;
use WP_REST_Response;
use WP_REST_Server;
use WP_Error;

/**
 * Services Controller class.
 */
final class ServicesController extends AbstractController {

	/**
	 * Route base.
	 *
	 * @var string
	 */
	protected $rest_base = 'services';

	/**
	 * Register routes.
	 *
	 * @return void
	 */
	public function register_routes(): void {
		// GET /services - List active services (public).
		register_rest_route(
			$this->namespace,
			'/' . $this->rest_base,
			array(
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_items' ),
					'permission_callback' => array( $this, 'public_permission' ),
					'args'                => $this->get_services_collection_params(),
				),
			)
		);

		// GET /services/{id} - Get single service (public).
		register_rest_route(
			$this->namespace,
			'/' . $this->rest_base . '/(?P<id>[\d]+)',
			array(
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_item' ),
					'permission_callback' => array( $this, 'public_permission' ),
					'args'                => array(
						'id' => array(
							'description'       => __( 'Service ID.', 'wp-bnb' ),
							'type'              => 'integer',
							'required'          => true,
							'sanitize_callback' => 'absint',
						),
					),
				),
			)
		);

		// POST /services/{id}/calculate - Calculate service price.
		register_rest_route(
			$this->namespace,
			'/' . $this->rest_base . '/(?P<id>[\d]+)/calculate',
			array(
				array(
					'methods'             => WP_REST_Server::CREATABLE,
					'callback'            => array( $this, 'calculate_price' ),
					'permission_callback' => array( $this, 'public_permission' ),
					'args'                => array(
						'id'       => array(
							'description'       => __( 'Service ID.', 'wp-bnb' ),
							'type'              => 'integer',
							'required'          => true,
							'sanitize_callback' => 'absint',
						),
						'quantity' => array(
							'description'       => __( 'Quantity.', 'wp-bnb' ),
							'type'              => 'integer',
							'default'           => 1,
							'minimum'           => 1,
							'sanitize_callback' => 'absint',
						),
						'nights'   => array(
							'description'       => __( 'Number of nights (for per-night services).', 'wp-bnb' ),
							'type'              => 'integer',
							'default'           => 1,
							'minimum'           => 1,
							'sanitize_callback' => 'absint',
						),
					),
				),
			)
		);
	}

	/**
	 * Get collection of services.
	 *
	 * @param WP_REST_Request $request Current request.
	 * @return WP_REST_Response|WP_Error Response object or error.
	 */
	public function get_items( $request ) {
		$rate_limit_error = $this->check_rate_limit( $request );
		if ( $rate_limit_error ) {
			return $rate_limit_error;
		}

		$args = array(
			'post_type'      => Service::POST_TYPE,
			'post_status'    => 'publish',
			'posts_per_page' => 100, // Services typically don't need pagination.
			'orderby'        => 'meta_value_num',
			'meta_key'       => '_bnb_service_sort_order',
			'order'          => 'ASC',
		);

		$meta_query = array();

		// Status filter (default: active only).
		$status = $request->get_param( 'status' ) ?: 'active';
		if ( 'all' !== $status ) {
			$meta_query[] = array(
				'key'   => '_bnb_service_status',
				'value' => $status,
			);
		}

		// Pricing type filter.
		$pricing_type = $request->get_param( 'pricing_type' );
		if ( $pricing_type ) {
			$meta_query[] = array(
				'key'   => '_bnb_service_pricing_type',
				'value' => $pricing_type,
			);
		}

		if ( ! empty( $meta_query ) ) {
			$meta_query['relation'] = 'AND';
			$args['meta_query']     = $meta_query;
		}

		// Category filter.
		$category = $request->get_param( 'category' );
		if ( $category ) {
			$args['tax_query'] = array(
				array(
					'taxonomy' => 'bnb_service_category',
					'field'    => is_numeric( $category ) ? 'term_id' : 'slug',
					'terms'    => $category,
				),
			);
		}

		$services = get_posts( $args );
		$items    = array();

		foreach ( $services as $service ) {
			$items[] = $this->prepare_service_response( $service );
		}

		$response = $this->formatter->success( $items );

		return $this->add_rate_limit_headers( $response, $request );
	}

	/**
	 * Get single service.
	 *
	 * @param WP_REST_Request $request Current request.
	 * @return WP_REST_Response|WP_Error Response object or error.
	 */
	public function get_item( $request ) {
		$rate_limit_error = $this->check_rate_limit( $request );
		if ( $rate_limit_error ) {
			return $rate_limit_error;
		}

		$id   = $request->get_param( 'id' );
		$post = get_post( $id );

		if ( ! $post || Service::POST_TYPE !== $post->post_type || 'publish' !== $post->post_status ) {
			return $this->formatter->not_found( __( 'Service', 'wp-bnb' ) );
		}

		$data     = $this->prepare_service_response( $post, true );
		$response = $this->formatter->success( $data );

		return $this->add_rate_limit_headers( $response, $request );
	}

	/**
	 * Calculate service price.
	 *
	 * @param WP_REST_Request $request Current request.
	 * @return WP_REST_Response|WP_Error Response object or error.
	 */
	public function calculate_price( $request ) {
		$rate_limit_error = $this->check_rate_limit( $request );
		if ( $rate_limit_error ) {
			return $rate_limit_error;
		}

		$service_id = $request->get_param( 'id' );
		$quantity   = $request->get_param( 'quantity' );
		$nights     = $request->get_param( 'nights' );

		// Validate service.
		$service = get_post( $service_id );
		if ( ! $service || Service::POST_TYPE !== $service->post_type || 'publish' !== $service->post_status ) {
			return $this->formatter->not_found( __( 'Service', 'wp-bnb' ) );
		}

		// Check if service is active.
		$status = get_post_meta( $service_id, '_bnb_service_status', true );
		if ( 'active' !== $status ) {
			return $this->formatter->validation_error( 'id', __( 'Service is not available.', 'wp-bnb' ) );
		}

		// Check max quantity.
		$max_quantity = (int) get_post_meta( $service_id, '_bnb_service_max_quantity', true ) ?: 1;
		if ( $quantity > $max_quantity ) {
			return $this->formatter->validation_error(
				'quantity',
				sprintf(
					/* translators: %d: maximum quantity */
					__( 'Maximum quantity is %d.', 'wp-bnb' ),
					$max_quantity
				)
			);
		}

		// Calculate price.
		$total         = Service::calculate_service_price( $service_id, $quantity, $nights );
		$pricing_type  = get_post_meta( $service_id, '_bnb_service_pricing_type', true );
		$unit_price    = (float) get_post_meta( $service_id, '_bnb_service_price', true );
		$currency      = get_option( 'wp_bnb_currency', 'CHF' );

		// Build calculation string.
		$calculation = '';
		switch ( $pricing_type ) {
			case 'included':
				$calculation = __( 'Included', 'wp-bnb' );
				break;
			case 'per_booking':
				$calculation = sprintf(
					'%s x %d',
					Calculator::formatPrice( $unit_price ),
					$quantity
				);
				break;
			case 'per_night':
				$calculation = sprintf(
					'%s x %d x %d %s',
					Calculator::formatPrice( $unit_price ),
					$quantity,
					$nights,
					_n( 'night', 'nights', $nights, 'wp-bnb' )
				);
				break;
		}

		$data = array(
			'service_id'  => $service_id,
			'quantity'    => $quantity,
			'nights'      => $nights,
			'unit_price'  => $unit_price,
			'total'       => $total,
			'formatted'   => Calculator::formatPrice( $total ),
			'currency'    => $currency,
			'calculation' => $calculation,
		);

		$response = $this->formatter->success( $data );

		return $this->add_rate_limit_headers( $response, $request );
	}

	/**
	 * Prepare service data for response.
	 *
	 * @param \WP_Post $post Service post object.
	 * @param bool     $full Include full details.
	 * @return array Service data.
	 */
	private function prepare_service_response( \WP_Post $post, bool $full = false ): array {
		$pricing_type = get_post_meta( $post->ID, '_bnb_service_pricing_type', true );
		$price        = (float) get_post_meta( $post->ID, '_bnb_service_price', true );
		$status       = get_post_meta( $post->ID, '_bnb_service_status', true ) ?: 'active';
		$max_quantity = (int) get_post_meta( $post->ID, '_bnb_service_max_quantity', true ) ?: 1;
		$currency     = get_option( 'wp_bnb_currency', 'CHF' );

		$data = array(
			'id'           => $post->ID,
			'title'        => get_the_title( $post ),
			'slug'         => $post->post_name,
			'description'  => get_the_excerpt( $post ),
			'pricing'      => array(
				'type'      => $pricing_type,
				'price'     => $price,
				'formatted' => Service::format_service_price( Service::get_service_data( $post->ID ) ),
				'currency'  => $currency,
			),
			'max_quantity' => $max_quantity,
			'status'       => $status,
		);

		// Category.
		$categories = wp_get_post_terms( $post->ID, 'bnb_service_category' );
		if ( ! empty( $categories ) && ! is_wp_error( $categories ) ) {
			$category = $categories[0];
			$data['category'] = array(
				'id'   => $category->term_id,
				'name' => $category->name,
				'slug' => $category->slug,
				'icon' => get_term_meta( $category->term_id, '_bnb_service_category_icon', true ),
			);
		}

		if ( $full ) {
			$data['content']    = apply_filters( 'the_content', $post->post_content );
			$data['sort_order'] = (int) get_post_meta( $post->ID, '_bnb_service_sort_order', true );
		}

		$data['_links'] = array(
			'self' => array(
				array( 'href' => rest_url( $this->namespace . '/services/' . $post->ID ) ),
			),
		);

		return $data;
	}

	/**
	 * Get services collection parameters.
	 *
	 * @return array Collection parameters.
	 */
	private function get_services_collection_params(): array {
		return array(
			'status'       => array(
				'description'       => __( 'Filter by status (default: active).', 'wp-bnb' ),
				'type'              => 'string',
				'enum'              => array( 'active', 'inactive', 'all' ),
				'default'           => 'active',
				'sanitize_callback' => 'sanitize_text_field',
			),
			'pricing_type' => array(
				'description'       => __( 'Filter by pricing type.', 'wp-bnb' ),
				'type'              => 'string',
				'enum'              => array( 'included', 'per_booking', 'per_night' ),
				'sanitize_callback' => 'sanitize_text_field',
			),
			'category'     => array(
				'description'       => __( 'Filter by category (term ID or slug).', 'wp-bnb' ),
				'type'              => 'string',
				'sanitize_callback' => 'sanitize_text_field',
			),
		);
	}
}