<?php
declare(strict_types=1);


namespace ImageResizer\Lib;

use ImageResizer\Models\ResizeParams;
use ImageResizer\Models\Image;
use Psr\Log\AbstractLogger;

class Resizer
{
    public function __construct(
        private readonly ImageDb $imageDb,
        private readonly AbstractLogger $logger,
    )
    {}

    /**
     * @throws \Exception
     */
    public function performResize(string $path, ResizeParams $params)
    {
        // Check if the image has already been processed
        if ($image = $this->imageDb->findImage($path, $params)) {
            $this->logger->info("Found existing image", ['path'=>$path, 'params'=>$params]);
            header("Content-type: {${$image->getMime()}}");
            return base64_decode($image->encode(75));
        }

        // Fetch the image at the given URL
        $original_img = Image::fromUrl($_ENV['ROOT_DOMAIN'] . $path);
        $converted = $this->createVariant($original_img, $params);
        $this->logger->info("Created variant", ['path'=>$path, 'params'=>$params]);

        // Store the image in the database
        $this->imageDb->saveImage(
            $path,
            $params,
            $converted
        );
        $this->logger->info("Saved image", ['path'=>$path, 'params'=>$params]);

        header("Content-type: {$original_img->getMime()}");
        return base64_decode($converted);
    }

    private function createVariant(Image $original, ResizeParams $params): string
    {
        $quality = $params->quality ?: -1;
        $this->logger->info("Resizing image", ['params'=>$params]);

        $original->toWidth($params->width ?? intval($_ENV["DEFAULT_WIDTH"]));

        return $original->encode($quality);
    }


}