<?php
/**
 * The designer's data, written once in assets/ and read by its TypeScript and every host too: its fixed numbers
 * (designer.json: stage width, print DPI, a new side's area and print size, the editors' limits) and the bundled
 * t-shirt (mockups/tee.json) with its colours, sizes and starting prices (mockups/shirt.json).
 *
 * @package PrintBlob
 */

namespace PrintBlob;

defined( 'ABSPATH' ) || exit;

final class Designer_Data {

	/** @var array<string, array> */
	private static $files = array();

	public static function numbers(): array {
		return self::read( 'designer.json' );
	}

	public static function tee(): array {
		return self::read( 'mockups/tee.json' );
	}

	/** @return array{colours:array<int, array{slug:string, name:string, hex:string}>, sizes:string[], price:string, print_price:string} */
	public static function shirt(): array {
		return self::read( 'mockups/shirt.json' );
	}

	/**
	 * The font faces the designer offers, each with its family, label, weight, style and url (woff2): the bundled ones
	 * (assets/fonts/fonts.json) as the printblob_fonts filter leaves them.
	 *
	 * @return array[]
	 */
	public static function fonts(): array {
		$url   = plugins_url( 'assets/fonts/', FILE );
		$fonts = array();
		foreach ( self::read( 'fonts/fonts.json' ) as $face ) {
			$face['url'] = $url . $face['file'];
			unset( $face['file'] );
			$fonts[] = $face;
		}
		/**
		 * Filters the font faces offered in the designer. Each face: family, label, weight, style, url (woff2).
		 *
		 * @param array[] $fonts Font faces.
		 */
		return array_values( (array) apply_filters( 'printblob_fonts', $fonts ) );
	}

	/** A printed length in centimetres as pixels of the print file. */
	public static function print_pixels( float $cm ): int {
		return (int) round( $cm / 2.54 * self::numbers()['print_dpi'] );
	}

	private static function read( string $file ): array {
		if ( ! isset( self::$files[ $file ] ) ) {
			self::$files[ $file ] = (array) wp_json_file_decode( dirname( FILE ) . '/assets/' . $file, array( 'associative' => true ) );
		}
		return self::$files[ $file ];
	}
}