<?php

namespace DebenOldert\AutoDeploy;

use DebenOldert\PHPWork\Plugin;

include_once 'settings.class.php';

final class AutoDeploy extends Plugin
{
    private $headers = array();
    private $IAction;

    protected $settings;

    protected $data;
    protected $json;

    private $token;

    public function __construct(string $directory, string $namespace=Null)
    {
        parent::__construct($directory, $namespace);
    }

    public function processRequest()
    {
        global $PHPWORK;
        $this->data = file_get_contents('php://input');

        $this->parseHeaders();

        if($this->hasHeader('X-Gogs-Event')
        && $this->hasHeader('X-Gogs-Signature'))
        {
            $isAuthenticated = false;
            foreach ($this->settings['keys'] as $secret)
            {
                if($this->authenticate($secret))
                {
                    $isAuthenticated = true;
                    $this->token = $secret;
                    break;
                }
            }

            if($isAuthenticated)
            {
                $this->json = $this->parseData();
                //var_dump($this->json);
                switch (strtoupper($this->getHeader('X-Gogs-Event'))) {
                    case 'RELEASE':
                        include 'releaseaction.class.php';
                        $this->IAction = new ReleaseAction($this->json, $this->settings, $this->token);
                        break;
                    case 'PUSH':
                        //TODO: Implement PUSH event
                        break;
                    default:
                        $PHPWORK->sendHttpCode(501);
                }

                $this->IAction->start();

                if($this->IAction->isSuccess()){
                    $PHPWORK->sendHttpCode(200);
                }
                else
                {
                    $PHPWORK->sendHttpCode(500);
                }
            }
        }
    }

    private function authenticate($key)
    {
        global $PHPWORK;
        if($PHPWORK->isProduction())
        {
            $hash = hash_hmac('SHA256', $this->data, $key);
            return hash_equals($this->headers['X-Gogs-Signature'], $hash);
        }
        else
        {
            return true;
        }
    }


    private function parseHeaders()
    {
        foreach($_SERVER as $key=>$value)
        {
            if (strpos($key, 'HTTP_') === 0)
            {
                $key=str_replace(' ','-',ucwords(strtolower(str_replace('_',' ',substr($key,5)))));
                $this->headers[$key]=$value;
            }
        }
    }

    private function parseData()
    {
        return json_decode($this->data);
    }

    private function getHeader($key)
    {
        return $this->headers[$key] ?? Null;
    }

    private function hasHeader($key)
    {
        return $this->getHeader($key) !== Null;
    }

    public function route(string $key, array $match)
    {
        $this->processRequest();
    }

}

return __NAMESPACE__;