<?php

namespace Shikiryu\Bot;

class Bot
{
    /**
     * @var Request
     */
    protected $request;
    protected $events = [];
    protected $config = [];
    /**
     * @var string[]
     */
    protected static $masters = [];

    /**
     * @return string
     */
    protected function getMaster()
    {
        $masters = array_merge(self::$masters, $this->getConfig()['masters']);
        return $masters[array_rand($masters, 1)];
    }

    /**
     * Bot constructor.
     * @param array $config
     */
    public function __construct(array $config = [])
    {
        $this->config = $config;
    }

    /**
     * @param Request $request
     * @return bool
     */
    public function isValid(Request $request)
    {
        $this->request = $request;
        return $this->config['token'] === $request->getToken();
    }

    /**
     * @param string $pattern the pattern to listen for
     * @param \Closure|string $callback the callback to execute. Either a closure or a Class@method notation
     *
     * @return $this
     */
    public function hears($pattern, $callback)
    {
        if (!array_key_exists($pattern, $this->events)) {
            $this->events[$pattern] = $callback;
        } else {
            error_log(sprintf('Event %s déjà en place', $pattern));
        }

//        $this->events[$pattern][] = $callback;

        return $this;
    }

    /**
     * Try to match messages with the ones we should
     * listen to.
     */
    public function listen($sentence)
    {
        foreach ($this->events as $pattern => $command) {
            $preg_pattern = sprintf('#%s#i', $pattern);
            if (preg_match($preg_pattern, $sentence, $matches)) {
                if (is_callable($command)) {
                    call_user_func($command, $this);
                } else {
                    call_user_func([$command, 'getMessage'], $this, $matches);
                }
            } else {
                error_log(sprintf('%s ne match pas %s', $preg_pattern, $sentence));
            }
        }
        $this->replyPolitely('Je n\'ai pas compris');
    }

    /**
     * @param string $message
     */
    public function replyPolitely($message)
    {
        $message .= ', '.$this->getMaster().'.';
        $this->reply($message);
    }
    /**
     * @param string $message
     */
    public function reply($message)
    {
        header('Content-type: application/json');
        die('{"text": "'.$message.'"}');
    }

    public function getConfig()
    {
    	return $this->config;
    }
}