import time
import random

import yaml
import aiocron
import telethon
import pgbotlib.response


class Cron:
    def __init__(self,
                 config: dict,
                 client: telethon.TelegramClient,
                 responder: pgbotlib.response.Responder) -> None:
        with open(config['schedule'], 'r', encoding='utf-8') as data:
            self.sched = yaml.safe_load(data.read())
            self.responder = responder
            self.client = client

    def __mkjob(self, job: dict) -> callable:
        tokens = frozenset(job['tokens'].split(','))
        async def send_message() -> None:
            if 'rand' in job:
                time.sleep(random.randint(0, job['rand']) * 60)
            message = self.responder.get_response(tokens)
            message = self.responder.api_match(message, '')
            await self.client.send_message(job['chat'], message)
        return send_message

    def plan(self) -> None:
        for job in self.sched:
            aiocron.crontab(job['cron'], func=self.__mkjob(job))