<?php

namespace App\Image;

use Jcupitt\Vips\Image;
use Jcupitt\Vips\Interpretation;

class ImageProcessor
{
    public function process(string $filename, string $target, array $options = ["w" => null, "h" => null, "r" => null,"flip" => null , "canv" => null,"rotation" => null],$saveOptions = ['Q' => 100])
    {
        if (!isset($options['w']) && !isset($options['h'])) {
            $image = Image::thumbnail($filename, getimagesize($filename)[1]);
        }

        if (isset($options['r'])) {
            $rArray = explode(':', $options['r']);

            if (isset($options['w']) && !isset($options['h'])) {
                $options['h'] = $options['w'] * $rArray[1];
                $options['w'] = $options['w'] * $rArray[0];
            }


            if (!isset($options['w']) && isset($options['h'])) {
                $options['h'] = $options['h'] * $rArray[1];
                $options['w'] = $options['h'] * $rArray[0];
            }
            if (!isset($options['w']) && !isset($options['h'])) {
                $options['h'] = getimagesize($filename)[0] * $rArray[1];
                $options['w'] = getimagesize($filename)[0] * $rArray[0];
            }
        }

        if (isset($options['w']) && !isset($options['h'])) {
            $image = Image::thumbnail($filename, $options['w'], ['height' => getimagesize($filename)[1]]);
        }

        if (!isset($options['w']) && isset($options['h'])) {
            $image = Image::thumbnail($filename, getimagesize($filename)[0], ['height' => $options['h']]);
        }


        if (isset($options['w']) && isset($options['h']) && !($options['canv'] == true)) {
            $image = Image::thumbnail($filename, $options['w'], ['height' => $options['h'], 'crop' => 'centre']);
        }

        if (isset($options['w']) && isset($options['h']) && $options['canv'] == true) {
            $image = Image::thumbnail($filename, $options['w'], ['height' => $options['h']]);
            $widthH = ($options['h'] - $image->height) / 2;
            $widthW = ($options['w'] - $image->width) / 2;
            $image = $image->embed(
                $widthW,
                $widthH,
                $options['w'],
                $options['h'],
                ['extend' => 'background', 'background' => 1024]
            );
        }

        if (isset($options['brightness']) || isset($options['saturation']) || isset($options['hue'])) {
            $image = $this->brightness($image, isset($options['brightness']) ? $options['brightness'] : 1.0, isset($options['saturation']) ? $options['saturation'] : 1.0, isset($options['hue']) ? $options['hue'] : 0.0);
        }

        if (isset($options['rotation'])) {
            $image = $image->rotate($options['rotation']);
        }

        if (isset($options['flip'])) {
            if ($options['flip'] == "h") {
                $image = $image->fliphor();
            }

            if ($options['flip'] == "v") {
                $image = $image->flipver();
            }

            if ($options['flip'] == "hv") {
                $image = $image->fliphor();
                $image = $image->flipver();
            }
        }

        $image->writeToFile($target,$saveOptions);

        return new \Illuminate\Http\File($target);
    }

    public function createFakeImage($stub,$path, $saveOptions  = ['Q' => 100],$options =  ["w" => null, "h" => null, "r" => null,"flip" => null , "canv" => null,"rotation" => null])
    {
        $image = $this->process($stub,$path,$options,$saveOptions);
    }


    public function brightness($image, float $brightness = 1.0, float $saturation = 1.0, float $hue = 0.0)
    {
        $oldInterpretation = $image->interpretation;
        $hue %= 360;
        if ($hue < 0) {
            $hue = 360 + $hue;
        }
        if ($image->hasAlpha()) {
            $imageWithoutAlpha = $image->extract_band(0, ['n' => $image->bands - 1]);
            $alpha = $image->extract_band($image->bands - 1, ['n' => 1]);
            return $imageWithoutAlpha
                ->colourspace(Interpretation::LCH)
                ->linear([$brightness, $saturation, 1.0], [0.0, 0.0, $hue])
                ->colourspace($oldInterpretation)
                ->bandjoin($alpha);
        }
        return $image
            ->colourspace(Interpretation::LCH)
            ->linear([$brightness, $saturation, 1.0], [0.0, 0.0, $hue])
            ->colourspace($oldInterpretation);
    }

    public function convertImage(string $filePath,string $target,array $options = ['Q' => 100]) : \Illuminate\Http\File
    {
        $tmpFile = \Jcupitt\Vips\Image::newFromFile($filePath);
        $tmpFile->writeToFile($target,$options);
        return new \Illuminate\Http\File($target);
    }
}