<?php

declare( strict_types=1 );

namespace Rooster\Core;

defined( 'ABSPATH' ) || exit;

final class Images {

	public const META    = '_rooster_webp';
	public const QUALITY = 82;

	
	public const PHONE = [ 480, 768, 1200 ];

	
	public const COMPUTER = [ 1280, 1600, 2560 ];

	public static function boot(): void {
		add_action( 'delete_attachment', [ self::class, 'delete' ] );
	}

	
	public static function raster( int $id ): bool {
		return in_array( (string) get_post_mime_type( $id ), [ 'image/jpeg', 'image/png', 'image/webp', 'image/gif', 'image/avif' ], true )
			&& wp_image_editor_supports( [ 'mime_type' => 'image/webp' ] );
	}

	
	public static function webp( int $id, array $widths ): array {
		$file = (string) get_attached_file( $id );
		$meta = wp_get_attachment_metadata( $id );
		$full = (int) ( $meta['width'] ?? 0 );
		if ( ! $full || '' === $file || ! file_exists( $file ) || ! self::raster( $id ) ) {
			return [];
		}
		$widths = array_filter( array_map( 'intval', $widths ), static fn ( int $w ): bool => $w > 0 && $w < $full );
		$widths = array_unique( array_merge( $widths, [ $full ] ) );
		sort( $widths );
		$have    = get_post_meta( $id, self::META, true );
		$have    = is_array( $have ) ? $have : [];
		$uploads = wp_get_upload_dir();
		$out     = [];
		$changed = false;
		foreach ( $widths as $w ) {
			$entry = $have[ $w ] ?? null;
			if ( ! is_array( $entry ) || empty( $entry['file'] ) || ! file_exists( $uploads['basedir'] . '/' . $entry['file'] ) ) {
				$entry = self::make( $file, $w );
				if ( null === $entry ) {
					continue;
				}
				$have[ $w ] = $entry;
				$changed    = true;
			}
			$out[ $uploads['baseurl'] . '/' . $entry['file'] ] = (int) $entry['width'];
		}
		if ( $changed ) {
			update_post_meta( $id, self::META, $have );
		}
		return $out;
	}

	
	private static function make( string $file, int $width ): ?array {
		$editor = wp_get_image_editor( $file );
		if ( is_wp_error( $editor ) ) {
			return null;
		}
		$size = $editor->get_size();
		if ( $width < (int) ( $size['width'] ?? 0 ) && is_wp_error( $editor->resize( $width, null ) ) ) {
			return null;
		}
		$editor->set_quality( self::QUALITY );
		$saved = $editor->save( (string) preg_replace( '/\.[a-z0-9]+$/i', '', $file ) . '-' . $width . 'w.webp', 'image/webp' );
		if ( is_wp_error( $saved ) || empty( $saved['path'] ) ) {
			return null;
		}
		return [ 'file' => (string) _wp_relative_upload_path( (string) $saved['path'] ), 'width' => (int) $saved['width'], 'height' => (int) $saved['height'] ];
	}

	
	public static function delete( $id ): void {
		$base = wp_get_upload_dir()['basedir'] . '/';
		$have = get_post_meta( (int) $id, self::META, true );
		foreach ( is_array( $have ) ? $have : [] as $entry ) {
			if ( is_array( $entry ) && ! empty( $entry['file'] ) && file_exists( $base . $entry['file'] ) ) {
				wp_delete_file( $base . $entry['file'] );
			}
		}
	}
}