<?php

declare(strict_types=1);

namespace AlexBrin\Parachute;

use pocketmine\entity\Skin;
use pocketmine\event\Listener;
use pocketmine\event\player\PlayerJoinEvent;
use pocketmine\plugin\PluginBase;

class Parachute extends PluginBase implements Listener {

    /**
     * @type string
     */
    private $skinData;

    /**
     * @type string
     */
    private $geometryData;

    protected function onEnable() {
        $f = $this->getDataFolder();
        if(!is_dir($f))
            @mkdir($f);

        $this->saveResource('model.json');
        $this->saveResource('skydiver.png');

        if(!file_exists($f . 'skin.data'))
            $this->prepareImage();

        $this->skinData = file_get_contents($f . 'skin.data');
        $this->geometryData = file_get_contents($f . 'model.json');

        $this->getServer()->getPluginManager()->registerEvents($this, $this);
    }

    public function onPlayerJoin(PlayerJoinEvent $event) {
        $player = $event->getPlayer();
        $player->changeSkin(
            new Skin(
                'Standard_Custom',
                $this->skinData,
                '',
                'geometry.skydiver',
                $this->geometryData
            ), 'geometry.skydiver', $player->getSkin()->getGeometryName()
        );
    }

    /**
     * Переводит изображение в понятный майнкрафту формат
     */
    private function prepareImage() {
        $skin = imagecreatefrompng($this->getDataFolder() . 'skydiver.png');

        $skinData = "";
        for($y = 0, $h = imagesy($skin); $y < $h; $y++)
            for($x = 0, $w = imagesx($skin); $x < $w; $x++) {
                $rgb = imagecolorat($skin, $x, $y);
                $skinData .= chr(($rgb >> 16) & 0xFF)
                    .  chr(($rgb >> 8) & 0xFF)
                    .  chr($rgb & 0xFF)
                    .  chr(255);
            }

        file_put_contents($this->getDataFolder() . 'skin.data', $skinData);
    }

}