<?php

namespace App\Image;

use App\Http\Controllers\Traits\FileTrait;
use App\Image\Traits\ModulateTrait;
use Illuminate\Contracts\Validation\Rule;
use Illuminate\Support\Facades\Validator;
use Illuminate\Validation\Rule as ValidationRule;
use Jcupitt\Vips\Image;
use Jcupitt\Vips\Interpretation;

class ImageProcessor
{
    use ModulateTrait, FileTrait;

    protected $defaultW = 2000;
    protected $defaultH = 2000;

    public function process(string $filename, string $target, array $options = [], $saveOptions = ['Q' => 100])
    {


        if (array_key_exists('w', $options) && array_key_exists('h', $options) && array_key_exists('r', $options)) {
            unset($options['r']);
        }

        if (array_key_exists('r', $options)) {
            $options['r'] = explode(':', $options['r']);
            if (count($options['r']) != 2) {
                unset($options['r']);
            }

            $validator = Validator::make($options, [
                'r' => ['nullable', 'array'],
                'r.*' => ['nullable', 'numeric'],
            ]);
            if ($validator->fails()) {
                foreach ($validator->messages()->getMessages() as $field_name => $messages) {
                    unset($options[explode('.', $field_name)[0]]);
                }
            }
        }

        if (array_key_exists('r', $options)) {

            if (array_key_exists('w', $options) && !array_key_exists('h', $options)) {
                $options['w'] = $options['w'] * $options['r'][0];
                $options['h'] = $options['w'] * $options['r'][1];
            }

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

            unset($options['r']);
        }

        $validator = Validator::make($options, [
            'w' => ['numeric', 'between:1,2000'],
            'h' => ['numeric', 'between:1,2000'],
            'canv' => ['boolean'],
            'brightness' => ['numeric', 'between:0,100'],
            'saturation' => ['numeric', 'between:0,100'],
            'hue' => ['numeric', 'between:0,100'],
            'rotation' => ['numeric'],
            'flip' => ['string', ValidationRule::in(['h', 'v', 'hv'])]
        ]);

        if ($validator->fails()) {
            foreach ($validator->messages()->getMessages() as $field_name => $messages) {
                unset($options[$field_name]);
            }
        }


        if (!array_key_exists('w', $options) && !array_key_exists('h', $options)) {
            $image = Image::newFromFile($filename);
        }

        if (array_key_exists('w', $options) && !array_key_exists('h', $options)) {
            $image = Image::thumbnail($filename, $options['w'], ['height' => $this->defaultH]);
        }

        if (!array_key_exists('w', $options) && array_key_exists('h', $options)) {
            $image = Image::thumbnail($filename, $this->defaultW, ['height' => $options['h']]);
        }

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

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

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

        if (array_key_exists('flip', $options)) {
            if ($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])
    {
        return $this->process($stub, $path, $options, $saveOptions);
    }

    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);
    }
}