<?php

namespace Shikiryu\WebGobbler\Assembler;

use Shikiryu\WebGobbler\Assembler;

class Mosaic extends Assembler
{
    /**
     * @param string $file
     *
     * @return void
     * @throws \ImagickException
     */
    public function saveTo($file)
    {
        try {
            $final_image = new \Imagick();
            $final_image->setColorspace(\Imagick::COLORSPACE_RGB);
            $final_image->newImage($this->config->get('assembler.sizex'), $this->config->get('assembler.sizey'), 'none');
            $final_image = $this->prepareImage($final_image);

            $final_image->writeImage($file);
        } catch (\ImagickException $e) {
            echo $e->getMessage();
        }
    }

    /**
     *
     */
    public function display()
    {
        try {
            $final_image = new \Imagick();
            $final_image->setColorspace(\Imagick::COLORSPACE_RGB);
            $final_image->newImage($this->config->get('assembler.sizex'), $this->config->get('assembler.sizey'), 'none');
            $final_image = $this->prepareImage($final_image);

            header('Content-type: image/jpeg');
            echo $final_image;
        } catch (\ImagickException $e) {
            echo $e->getMessage();
        }
    }

    /**
     * @param \Imagick $final_image
     *
     * @return \Imagick
     * @throws \ImagickException
     */
    private function prepareImage(\Imagick $final_image)
    {
        $image_size_x = $this->config->get('assembler.sizex') / $this->config->get('assembler.nbx');
        $image_size_y = $this->config->get('assembler.sizey') / $this->config->get('assembler.nby');
        for ($y = 0; $y < $this->config->get('assembler.nby'); $y++) {
            for ($x = 0; $x < $this->config->get('assembler.nbx'); $x++) {
                $file = $this->pool->getImage();
                $this->files[] = $file;
                $image = new \Imagick($file);
                if ($image->getColorspace() !== \Imagick::COLORSPACE_RGB) {
                    $image->setColorspace(\Imagick::COLORSPACE_RGB);
                }
                $image->scaleImage($image_size_x, $image_size_y, true);
                $final_image->compositeImage($image, \Imagick::COMPOSITE_DEFAULT, $x * $image_size_x, $y * $image_size_y);
            }
        }
        if (true === $this->config->get('assembler.mirror')) {
            $final_image->flopImage();
        }
        if (true === $this->config->get('assembler.emboss')) {
            $final_image->embossImage(0, 1);
        }
        if (true === $this->config->get('assembler.invert')) {
            $final_image->negateImage(false);
        }

        return $final_image;
    }
}