<?php
namespace Vichan\Service\Media;

use Vichan\Data\ThumbGenerationResult;


class FallbackThumbGenerator implements ThumbGenerator {
	private string $thumb_path;
	private string $thumb_width;
	private string $thumb_height;


	public function __construct(ImageFormatReader $image_format_reader, string $default_thumb_path) {
		list($width, $height) = $image_format_reader->getSizes($default_thumb_path);
		$this->thumb_path = $default_thumb_path;
		$this->thumb_width = $width;
		$this->thumb_height = $height;
	}

	public function supportsMime(string $mime): bool {
		return true;
	}

	public function generateThumb(
		string $source_file_path,
		string $preferred_out_file_path,
		int $max_width,
		int $max_height
	): ThumbGenerationResult {
		$res = new ThumbGenerationResult();
		$res->thumb_file_path = $this->thumb_path;
		$res->is_thumb_file_temporary = false;
		$res->width = \min($this->thumb_width, $max_width);
		$res->height = \min($this->thumb_height, $max_height);
		return $res;
	}
}