<?php
/**
 * Maps shop colour names (English or Bulgarian, single or "a/b" two-tone) to:
 * - the marketplace's colour filter value (attribute "colorfashion"); two-tone items use the first (main) colour;
 * - a Bulgarian colour name for the advert text ("цвят тъмносин/графитен").
 *
 * @package Tidelist
 */

namespace Tidelist\Mapping;

/**
 * Colour mapping.
 */
final class ColourMap {

	/**
	 * Colour word => [marketplace code, Bulgarian name (masculine, after "цвят")].
	 */
	const WORDS = array(
		'black'         => array( 'black', 'черен' ),
		'черно'         => array( 'black', 'черен' ),
		'черен'         => array( 'black', 'черен' ),
		'cheren'        => array( 'black', 'черен' ),
		'white'         => array( 'white', 'бял' ),
		'бял'           => array( 'white', 'бял' ),
		'бяло'          => array( 'white', 'бял' ),
		'bql'           => array( 'white', 'бял' ),
		'navy'          => array( 'navy_blue', 'тъмносин' ),
		'тъмносин'      => array( 'navy_blue', 'тъмносин' ),
		'royal'         => array( 'blue', 'кралскосин' ),
		'royal-melange' => array( 'blue', 'кралскосин меланж' ),
		'blue'          => array( 'blue', 'син' ),
		'син'           => array( 'blue', 'син' ),
		'синьо'         => array( 'blue', 'син' ),
		'sinyo'         => array( 'blue', 'син' ),
		'bright-blue'   => array( 'blue', 'яркосин' ),
		'light-blue'    => array( 'blue', 'светлосин' ),
		'carbon'        => array( 'grey', 'графитен' ),
		'grey'          => array( 'grey', 'сив' ),
		'сив'           => array( 'grey', 'сив' ),
		'сиво'          => array( 'grey', 'сив' ),
		'sivo'          => array( 'grey', 'сив' ),
		'light-grey'    => array( 'grey', 'светлосив' ),
		'dark-grey'     => array( 'grey', 'тъмносив' ),
		'grey-melange'  => array( 'grey', 'сив меланж' ),
		'anthracite'    => array( 'grey', 'антрацит' ),
		'red'           => array( 'red', 'червен' ),
		'червен'        => array( 'red', 'червен' ),
		'light-red'     => array( 'red', 'светлочервен' ),
		'orange'        => array( 'orange', 'оранжев' ),
		'bright-orange' => array( 'orange', 'яркооранжев' ),
		'green'         => array( 'green', 'зелен' ),
		'зелен'         => array( 'green', 'зелен' ),
		'dark-green'    => array( 'green', 'тъмнозелен' ),
		'fern-green'    => array( 'green', 'тъмнозелен' ),
		'spring-green'  => array( 'green', 'светлозелен' ),
		'lime-green'    => array( 'green', 'лайм' ),
		'olive'         => array( 'olive', 'маслинен' ),
		'khaki'         => array( 'olive', 'каки' ),
		'yellow'        => array( 'yellow', 'жълт' ),
		'жълт'          => array( 'yellow', 'жълт' ),
		'gold-yellow'   => array( 'yellow', 'златистожълт' ),
		'light-yellow'  => array( 'yellow', 'светложълт' ),
		'bright-yellow' => array( 'yellow', 'яркожълт' ),
		'natural'       => array( 'beige', 'натурален' ),
		'aqua'          => array( 'turquoise', 'аква' ),
		'turquoise'     => array( 'turquoise', 'тюркоазен' ),
		'petrol'        => array( 'turquoise', 'петролен' ),
		'pink'          => array( 'pink', 'розов' ),
		'розов'         => array( 'pink', 'розов' ),
		'bright-pink'   => array( 'pink', 'яркорозов' ),
		'light-berry'   => array( 'pink', 'светлорозов' ),
		'purple'        => array( 'violet', 'лилав' ),
		'лилав'         => array( 'violet', 'лилав' ),
		'silver'        => array( 'silver', 'сребрист' ),
		'brown'         => array( 'brown', 'кафяв' ),
		'кафяв'         => array( 'brown', 'кафяв' ),
		'beige'         => array( 'beige', 'бежов' ),
		'бежов'         => array( 'beige', 'бежов' ),
	);

	/**
	 * Maps a colour.
	 *
	 * @param string $colour Shop colour, e.g. "navy/carbon", "сиво и черно", "Бял, Син", "%d1%87...".
	 * @return array{code:string, name:string, known:bool} code is "" when the colour is empty.
	 */
	public static function map( string $colour ): array {
		$colour = trim( mb_strtolower( rawurldecode( $colour ), 'UTF-8' ) );
		if ( '' === $colour ) {
			return array(
				'code'  => '',
				'name'  => '',
				'known' => false,
			);
		}
		if ( isset( self::WORDS[ $colour ] ) ) {
			return array(
				'code'  => self::WORDS[ $colour ][0],
				'name'  => self::WORDS[ $colour ][1],
				'known' => true,
			);
		}

		$parts = preg_split( '#\s*(?:/|,| и )\s*#u', $colour );
		$codes = array();
		$names = array();
		$known = true;
		foreach ( $parts as $part ) {
			$part = trim( (string) $part );
			if ( '' === $part ) {
				continue;
			}
			if ( isset( self::WORDS[ $part ] ) ) {
				$codes[] = self::WORDS[ $part ][0];
				$names[] = self::WORDS[ $part ][1];
			} else {
				$known   = false;
				$names[] = $part;
			}
		}
		return array(
			'code'  => $codes ? $codes[0] : 'other',
			'name'  => implode( '/', array_unique( $names ) ),
			'known' => $known && (bool) $codes,
		);
	}
}