<?php

namespace App;

use External;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\Config;
use Illuminate\Support\Facades\URL;
use Symfony\Component\HttpFoundation\File\UploadedFile;

class Image extends Model
{
    const NORMAL = 1;
    const ORIGINAL = 2;
    const THUMBNAIL = 3;
    const SMALL = 4;

    public static $ImageTypes = [
        self::NORMAL => ['id' => self::NORMAL, 'name' => 'normal', 'width' => 350, 'height' => 350],
        self::ORIGINAL => ['id' => self::ORIGINAL, 'name' => 'original', 'width' => null, 'height' => null],
        self::SMALL => ['id' => self::SMALL, 'name' => 'small', 'width' => 100, 'height' => 100],
        self::THUMBNAIL => ['id' => self::THUMBNAIL, 'name' => 'thumbnail', 'width' => 50, 'height' => 50]
    ];

    public static function getImageTypeFromName($name)
    {
        foreach (self::$ImageTypes as $cover) {
            if ($cover['name'] != $name) {
                continue;
            }

            return $cover;
        }

        return null;
    }

    public static function upload(UploadedFile $file, $user)
    {
        $userId = $user;
        if ($user instanceof User) {
            $userId = $user->id;
        }

        $hash = md5_file($file->getPathname());
        $image = Image::whereHash($hash)->whereUploadedBy($userId)->first();

        if ($image) {
            return $image;
        }

        $image = new Image();
        try {
            $image->uploaded_by = $userId;
            $image->size = $file->getSize();
            $image->filename = $file->getClientOriginalName();
            $image->extension = $file->getClientOriginalExtension();
            $image->mime = $file->getMimeType();
            $image->hash = $hash;
            $image->save();

            $image->ensureDirectoryExists();
            foreach (self::$ImageTypes as $coverType) {
                $command = 'convert 2>&1 "' . $file->getPathname() . '" -background transparent -flatten +matte -strip -quality 95 -format png ';
                if (isset($coverType['width']) && isset($coverType['height'])) {
                    $command .= '-thumbnail ' . $coverType['width'] . 'x' . $coverType['height'] . '^ -gravity center -extent ' . $coverType['width'] . 'x' . $coverType['height'] . ' ';
                }

                $command .= '"' . $image->getFile($coverType['id']) . '"';
                External::execute($command);
            }

            return $image;
        } catch (\Exception $e) {
            $image->delete();
            throw $e;
        }
    }

    protected $table = 'images';

    public function getUrl($type = self::NORMAL)
    {
        $type = self::$ImageTypes[$type];

        return URL::to('i' . $this->id . '/' . $type['name'] . '.png');
    }

    public function getFile($type = self::NORMAL)
    {
        return $this->getDirectory() . '/' . $this->getFilename($type);
    }

    public function getFilename($type = self::NORMAL)
    {
        $typeInfo = self::$ImageTypes[$type];

        return $this->id . '_' . $typeInfo['name'] . '.png';
    }

    public function getDirectory()
    {
        $dir = (string)(floor($this->id / 100) * 100);

        return Config::get('app.files_directory') . '/images/' . $dir;
    }

    public function ensureDirectoryExists()
    {
        $destination = $this->getDirectory();
        umask(0);

        if (!is_dir($destination)) {
            mkdir($destination, 0777, true);
        }
    }
}