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

declare( strict_types=1 );

namespace Magdev\WpBnb\Api\Controllers;

use Magdev\WpBnb\PostTypes\Building;
use Magdev\WpBnb\PostTypes\Room;
use WP_REST_Request;
use WP_REST_Response;
use WP_REST_Server;
use WP_Error;

/**
 * Buildings Controller class.
 */
final class BuildingsController extends AbstractController {

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

	/**
	 * Register routes.
	 *
	 * @return void
	 */
	public function register_routes(): void {
		// GET /buildings - List all buildings.
		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_collection_params(),
				),
			)
		);

		// GET /buildings/{id} - Get single building.
		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'       => __( 'Building ID.', 'wp-bnb' ),
							'type'              => 'integer',
							'required'          => true,
							'sanitize_callback' => 'absint',
						),
					),
				),
			)
		);

		// GET /buildings/{id}/rooms - Get rooms in building.
		register_rest_route(
			$this->namespace,
			'/' . $this->rest_base . '/(?P<id>[\d]+)/rooms',
			array(
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_building_rooms' ),
					'permission_callback' => array( $this, 'public_permission' ),
					'args'                => array(
						'id'     => array(
							'description'       => __( 'Building ID.', 'wp-bnb' ),
							'type'              => 'integer',
							'required'          => true,
							'sanitize_callback' => 'absint',
						),
						'status' => array(
							'description'       => __( 'Filter by room status.', 'wp-bnb' ),
							'type'              => 'string',
							'enum'              => array( 'available', 'occupied', 'maintenance', 'blocked' ),
							'sanitize_callback' => 'sanitize_text_field',
						),
					),
				),
			)
		);
	}

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

		$pagination = $this->get_pagination_params( $request );
		$sorting    = $this->get_sorting_params( $request, array( 'title', 'date' ), 'title' );

		$args = array(
			'post_type'      => Building::POST_TYPE,
			'post_status'    => 'publish',
			'posts_per_page' => $pagination['per_page'],
			'offset'         => $pagination['offset'],
			'orderby'        => $sorting['orderby'],
			'order'          => $sorting['order'],
		);

		// Search filter.
		$search = $request->get_param( 'search' );
		if ( $search ) {
			$args['s'] = $search;
		}

		$query = new \WP_Query( $args );
		$items = array();

		foreach ( $query->posts as $post ) {
			$items[] = $this->prepare_building_response( $post );
		}

		$response = $this->formatter->collection(
			$items,
			$query->found_posts,
			$pagination['page'],
			$pagination['per_page']
		);

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

	/**
	 * Get single building.
	 *
	 * @param WP_REST_Request $request Current request.
	 * @return WP_REST_Response|WP_Error Response object or error.
	 */
	public function get_item( $request ) {
		// Check rate limit.
		$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 || Building::POST_TYPE !== $post->post_type || 'publish' !== $post->post_status ) {
			return $this->formatter->not_found( __( 'Building', 'wp-bnb' ) );
		}

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

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

	/**
	 * Get rooms in a building.
	 *
	 * @param WP_REST_Request $request Current request.
	 * @return WP_REST_Response|WP_Error Response object or error.
	 */
	public function get_building_rooms( $request ) {
		// Check rate limit.
		$rate_limit_error = $this->check_rate_limit( $request );
		if ( $rate_limit_error ) {
			return $rate_limit_error;
		}

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

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

		$args = array(
			'post_type'      => Room::POST_TYPE,
			'post_status'    => 'publish',
			'posts_per_page' => -1,
			'meta_query'     => array(
				array(
					'key'   => '_bnb_room_building_id',
					'value' => $building_id,
				),
			),
			'orderby'        => 'meta_value',
			'meta_key'       => '_bnb_room_room_number',
			'order'          => 'ASC',
		);

		// Filter by status.
		$status = $request->get_param( 'status' );
		if ( $status ) {
			$args['meta_query'][] = array(
				'key'   => '_bnb_room_status',
				'value' => $status,
			);
		}

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

		foreach ( $rooms as $room ) {
			$items[] = $this->prepare_room_summary( $room );
		}

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

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

	/**
	 * Prepare building data for response.
	 *
	 * @param \WP_Post $post    Building post object.
	 * @param bool     $full    Include full details.
	 * @return array Building data.
	 */
	private function prepare_building_response( \WP_Post $post, bool $full = false ): array {
		$data = $this->format_post_base( $post );

		// Featured image.
		$data['featured_image'] = $this->format_featured_image( $post->ID );
		$data['permalink']      = get_permalink( $post->ID );

		// Address.
		$data['address'] = array(
			'street'      => get_post_meta( $post->ID, '_bnb_building_street', true ),
			'street2'     => get_post_meta( $post->ID, '_bnb_building_street2', true ),
			'city'        => get_post_meta( $post->ID, '_bnb_building_city', true ),
			'state'       => get_post_meta( $post->ID, '_bnb_building_state', true ),
			'postal_code' => get_post_meta( $post->ID, '_bnb_building_zip', true ),
			'country'     => get_post_meta( $post->ID, '_bnb_building_country', true ),
		);

		// Contact.
		$data['contact'] = array(
			'phone'   => get_post_meta( $post->ID, '_bnb_building_phone', true ),
			'email'   => get_post_meta( $post->ID, '_bnb_building_email', true ),
			'website' => get_post_meta( $post->ID, '_bnb_building_website', true ),
		);

		// Details.
		$data['details'] = array(
			'rooms_count'    => (int) get_post_meta( $post->ID, '_bnb_building_total_rooms', true ),
			'floors'         => (int) get_post_meta( $post->ID, '_bnb_building_floors', true ),
			'year_built'     => (int) get_post_meta( $post->ID, '_bnb_building_year_built', true ),
			'check_in_time'  => get_post_meta( $post->ID, '_bnb_building_check_in_time', true ) ?: '14:00',
			'check_out_time' => get_post_meta( $post->ID, '_bnb_building_check_out_time', true ) ?: '11:00',
		);

		// Count actual rooms.
		$actual_rooms = Room::get_rooms_for_building( $post->ID );
		$data['details']['actual_rooms_count'] = count( $actual_rooms );

		// Full address formatted.
		if ( $full ) {
			$data['address']['formatted'] = Building::get_formatted_address( $post->ID );

			// Country name.
			$countries = Building::get_countries();
			$country_code = $data['address']['country'];
			$data['address']['country_name'] = $countries[ $country_code ] ?? $country_code;
		}

		// Add HATEOAS links.
		$data['_links'] = array(
			'self'  => array(
				array( 'href' => rest_url( $this->namespace . '/buildings/' . $post->ID ) ),
			),
			'rooms' => array(
				array( 'href' => rest_url( $this->namespace . '/buildings/' . $post->ID . '/rooms' ) ),
			),
		);

		return $data;
	}

	/**
	 * Prepare room summary for building rooms list.
	 *
	 * @param \WP_Post $room Room post object.
	 * @return array Room summary data.
	 */
	private function prepare_room_summary( \WP_Post $room ): array {
		return array(
			'id'          => $room->ID,
			'title'       => get_the_title( $room ),
			'slug'        => $room->post_name,
			'permalink'   => get_permalink( $room->ID ),
			'room_number' => get_post_meta( $room->ID, '_bnb_room_room_number', true ),
			'floor'       => (int) get_post_meta( $room->ID, '_bnb_room_floor', true ),
			'capacity'    => (int) get_post_meta( $room->ID, '_bnb_room_capacity', true ),
			'status'      => get_post_meta( $room->ID, '_bnb_room_status', true ) ?: 'available',
			'thumbnail'   => get_the_post_thumbnail_url( $room->ID, 'thumbnail' ) ?: null,
			'_links'      => array(
				'self' => array(
					array( 'href' => rest_url( $this->namespace . '/rooms/' . $room->ID ) ),
				),
			),
		);
	}
}