<?php

namespace VoiceState;

use \Monolog\Logger;
use Discord\Parts\WebSockets\VoiceStateUpdate;

class Bot
{
    public const NAME = "VoiceState";
    public const MAX_LOG_FILE_COUNT = 7;
    private const STATE_FILE_TEMPLATE = "%s.json";

    private const STATE_DEFAULT = [
        'state' => null,
    ];
    private const STATE_ACTIVE = 'active';
    private const STATE_MUTE = 'muted';
    private const STATE_SELF_MUTE = 'selfMuted';

    private string $stateFileDir;
    private Logger $logger;

    public function __construct(string $stateFileDir, Logger $logger)
    {
        if (!is_dir($stateFileDir)) {
            throw new \RuntimeException("stateFileDir is no directory");
        }

        $this->stateFileDir = rtrim($stateFileDir, '/');
        $this->logger = $logger;
    }

    public function updateVoiceState(VoiceStateUpdate $voiceState): void
    {
        try {
            $stateFile = $this->stateFileDir . '/' . sprintf(self::STATE_FILE_TEMPLATE, $voiceState->user_id);

            if (!file_exists($stateFile)) {
                $this->createStatusFile($stateFile);
            }

            $state = $this->getState($voiceState);
            file_put_contents($stateFile, json_encode($state));
        } catch (\Throwable $t) {
            $this->logger->error($t);
        }
    }

    private function getState(VoiceStateUpdate $voiceState)
    {
        $state = self::STATE_DEFAULT;
        $state['state'] = self::STATE_ACTIVE;
        if ($voiceState->mute) {
            $state['state'] = self::STATE_MUTE;
        }
        if ($voiceState->self_mute) {
            $state['state'] = self::STATE_SELF_MUTE;
        }

        return $state;
    }

    private function createStatusFile(string $stateFile): void
    {
        if (file_exists($stateFile)) {
            return;
        }

        file_put_contents($stateFile, json_encode(self::STATE_DEFAULT));
        
        if (!file_exists($stateFile)) {
            throw new \RuntimeException("could not create statefile: " . $stateFile);
        }
    }
}