<?php

/*
 * This file is part of the Monolog package.
 *
 * (c) Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Monolog\Handler;

use Monolog\Formatter\LineFormatter;
use Monolog\Logger;

/**
 * Sends logs to Fleep.io using Webhook integrations
 *
 * You'll need a Fleep.io account to use this handler.
 *
 * @see https://fleep.io/integrations/webhooks/ Fleep Webhooks Documentation
 * @author Ando Roots <ando@sqroot.eu>
 */
class FleepHookHandler extends SocketHandler
{
    const FLEEP_HOST = 'fleep.io';

    const FLEEP_HOOK_URI = '/hook/';

    /**
     * @var string Webhook token (specifies the conversation where logs are sent)
     */
    protected $token;

    /**
     * Construct a new Fleep.io Handler.
     *
     * For instructions on how to create a new web hook in your conversations
     * see https://fleep.io/integrations/webhooks/
     *
     * @param  string                    $token  Webhook token
     * @param  bool|int                  $level  The minimum logging level at which this handler will be triggered
     * @param  bool                      $bubble Whether the messages that are handled can bubble up the stack or not
     * @throws MissingExtensionException
     */
    public function __construct($token, $level = Logger::DEBUG, $bubble = true)
    {
        if (!extension_loaded('openssl')) {
            throw new MissingExtensionException('The OpenSSL PHP extension is required to use the FleepHookHandler');
        }

        $this->token = $token;

        $connectionString = 'ssl://' . self::FLEEP_HOST . ':443';
        parent::__construct($connectionString, $level, $bubble);
    }

    /**
     * Returns the default formatter to use with this handler
     *
     * Overloaded to remove empty context and extra arrays from the end of the log message.
     *
     * @return LineFormatter
     */
    protected function getDefaultFormatter()
    {
        return new LineFormatter(null, null, true, true);
    }

    /**
     * Handles a log record
     *
     * @param array $record
     */
    public function write(array $record)
    {
        parent::write($record);
        $this->closeSocket();
    }

    /**
     * {@inheritdoc}
     *
     * @param  array  $record
     * @return string
     */
    protected function generateDataStream($record)
    {
        $content = $this->buildContent($record);

        return $this->buildHeader($content) . $content;
    }

    /**
     * Builds the header of the API Call
     *
     * @param  string $content
     * @return string
     */
    private function buildHeader($content)
    {
        $header = "POST " . self::FLEEP_HOOK_URI . $this->token . " HTTP/1.1\r\n";
        $header .= "Host: " . self::FLEEP_HOST . "\r\n";
        $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
        $header .= "Content-Length: " . strlen($content) . "\r\n";
        $header .= "\r\n";

        return $header;
    }

    /**
     * Builds the body of API call
     *
     * @param  array  $record
     * @return string
     */
    private function buildContent($record)
    {
        $dataArray = array(
            'message' => $record['formatted']
        );

        return http_build_query($dataArray);
    }
}