<?php
/**
 * Label maps and helpers (types, directions, stickers, C-15 detection).
 *
 * @package Fontdelbosc_Transit
 */

defined( 'ABSPATH' ) || exit;

/**
 * Maps raw API values to display labels.
 */
class Fontdelbosc_Transit_Maps {

	/**
	 * Translate a DATEX2 record type into a display label.
	 *
	 * @param string $type Raw type (local part of xsi:type).
	 * @return string
	 */
	public static function type_label( string $type ): string {
		switch ( $type ) {
			case 'Accident':
				return __( 'Accident', 'fontdelbosc-transit' );
			case 'MaintenanceWorks':
			case 'RoadWorks':
				return __( 'Roadworks', 'fontdelbosc-transit' );
			case 'VehicleObstruction':
			case 'ObstructionOnRoad':
				return __( 'Obstruction', 'fontdelbosc-transit' );
			case 'WeatherRelatedRoadConditions':
				return __( 'Weather conditions', 'fontdelbosc-transit' );
			case 'RoadsideAssistance':
				return __( 'Roadside assistance', 'fontdelbosc-transit' );
			case 'AbnormalTraffic':
			case 'TrafficCongestion':
				return __( 'Congestion', 'fontdelbosc-transit' );
			case 'NetworkManagement':
			case 'GeneralNetworkManagement':
				return __( 'Traffic management', 'fontdelbosc-transit' );
			case 'Restrictions':
				return __( 'Restrictions', 'fontdelbosc-transit' );
			default:
				return __( 'Incident', 'fontdelbosc-transit' );
		}
	}

	/**
	 * Translate a TPEG direction code into a display label.
	 *
	 * @param string $direction Raw direction code.
	 * @return string
	 */
	public static function direction_label( string $direction ): string {
		switch ( $direction ) {
			case 'northBound':
				return __( 'Northbound', 'fontdelbosc-transit' );
			case 'southBound':
				return __( 'Southbound', 'fontdelbosc-transit' );
			case 'eastBound':
				return __( 'Eastbound', 'fontdelbosc-transit' );
			case 'westBound':
				return __( 'Westbound', 'fontdelbosc-transit' );
			case 'bothWays':
			case 'both':
				return __( 'Both directions', 'fontdelbosc-transit' );
			default:
				return $direction;
		}
	}

	/**
	 * Translate a DATEX2 impact code into a display label.
	 *
	 * @param string $impact Raw impact code.
	 * @return string
	 */
	public static function impact_label( string $impact ): string {
		switch ( $impact ) {
			case 'heavy':
			case 'veryHeavy':
				return __( 'Heavy impact on traffic', 'fontdelbosc-transit' );
			case 'medium':
				return __( 'Medium impact on traffic', 'fontdelbosc-transit' );
			case 'light':
			case 'low':
				return __( 'Light impact on traffic', 'fontdelbosc-transit' );
			default:
				return $impact;
		}
	}

	/**
	 * Translate a validity status code into a display label.
	 *
	 * @param string $status Raw status code.
	 * @return string
	 */
	public static function status_label( string $status ): string {
		switch ( $status ) {
			case 'active':
				return __( 'Active', 'fontdelbosc-transit' );
			case 'scheduled':
				return __( 'Scheduled', 'fontdelbosc-transit' );
			default:
				return $status;
		}
	}

	/**
	 * Normalize a DGT sticker value ("Sin distintivo", "B", "C"...) to a label.
	 *
	 * @param string $sticker Raw sticker value.
	 * @return string
	 */
	public static function sticker_label( string $sticker ): string {
		switch ( $sticker ) {
			case 'Sin distintivo':
			case 'Sin etiqueta':
				return __( 'No label (pre-2000 petrol / pre-2006 diesel)', 'fontdelbosc-transit' );
			case 'B':
				return __( 'Label B', 'fontdelbosc-transit' );
			case 'C':
				return __( 'Label C', 'fontdelbosc-transit' );
			case 'ECO':
				return __( 'Label ECO', 'fontdelbosc-transit' );
			case '0':
				return __( 'Label 0 emissions', 'fontdelbosc-transit' );
			default:
				return $sticker;
		}
	}

	/**
	 * Map a DATEX2 record type to a stable icon/badge key.
	 *
	 * @param string $type Raw type (local part of xsi:type).
	 * @return string
	 */
	public static function type_key( string $type ): string {
		switch ( $type ) {
			case 'Accident':
				return 'accident';
			case 'MaintenanceWorks':
			case 'RoadWorks':
				return 'works';
			case 'VehicleObstruction':
			case 'ObstructionOnRoad':
				return 'obstruction';
			case 'WeatherRelatedRoadConditions':
				return 'weather';
			case 'RoadsideAssistance':
				return 'assistance';
			case 'AbnormalTraffic':
			case 'TrafficCongestion':
				return 'congestion';
			case 'NetworkManagement':
			case 'GeneralNetworkManagement':
				return 'management';
			case 'Restrictions':
				return 'restriction';
			default:
				return 'incident';
		}
	}

	/**
	 * Map a DGT sticker value to a chip color key (real label colors).
	 *
	 * @param string $sticker Raw sticker value.
	 * @return string
	 */
	public static function sticker_class( string $sticker ): string {
		switch ( $sticker ) {
			case 'Sin distintivo':
			case 'Sin etiqueta':
				return 'none';
			case 'B':
				return 'b';
			case 'C':
				return 'c';
			case 'ECO':
				return 'eco';
			case '0':
				return 'zero';
			default:
				return 'other';
		}
	}

	/**
	 * Whether an incident belongs to the C-15 corridor (Eix Garraf-Anoia).
	 *
	 * @param array<mixed> $incident Normalized incident.
	 * @return bool
	 */
	public static function is_c15( array $incident ): bool {
		$road = self::normalize_road( Fontdelbosc_Transit_Payload::str( $incident['road_name'] ?? null ) ?? '' );

		if ( 'C15' === $road || 'EIXGARRAF' === substr( $road, 0, 9 ) ) {
			return true;
		}

		$title       = Fontdelbosc_Transit_Payload::str( $incident['title'] ?? null ) ?? '';
		$description = Fontdelbosc_Transit_Payload::str( $incident['description'] ?? null ) ?? '';
		$haystack    = $title . ' ' . $description;

		// Word boundary required: C-153 and C-155 are different roads.
		return 1 === preg_match( '/C-?15\b/i', $haystack ) || false !== stripos( $haystack, 'eix garraf' );
	}

	/**
	 * Normalize a road name for comparison (uppercase, no spaces or hyphens).
	 *
	 * @param string $road Raw road name.
	 * @return string
	 */
	private static function normalize_road( string $road ): string {
		return strtoupper( preg_replace( '/[\s\-]+/u', '', $road ) ?? '' );
	}

	/**
	 * Format an ISO or RSS timestamp as a local date-time string.
	 *
	 * @param string $time Raw timestamp.
	 * @return string Empty when unparseable.
	 */
	public static function format_time( string $time ): string {
		if ( '' === $time ) {
			return '';
		}

		$ts = strtotime( $time );

		if ( false === $ts ) {
			return '';
		}

		$formatted = wp_date( 'j M Y H:i', $ts );

		return is_string( $formatted ) ? $formatted : '';
	}

	/**
	 * Human "last updated" line from a raw timestamp.
	 *
	 * @param string $time Raw timestamp.
	 * @return string Empty when unparseable.
	 */
	public static function last_updated( string $time ): string {
		if ( '' === $time ) {
			return '';
		}

		$ts = strtotime( $time );

		return false === $ts ? '' : sprintf(
			/* translators: %s: human-readable time difference. */
			__( 'Last updated: %s ago', 'fontdelbosc-transit' ),
			human_time_diff( $ts, time() )
		);
	}
}