from mastodon import Mastodon
from dotenv import load_dotenv
from pathlib import Path
import os
import time


def megafono():
    """
    Toot only one line from ANNOUNCEMENT_FILE gradually or random if RANDOM is set.
    It's useful configure a crontab for invocation
    """
    load_dotenv()
    INSTANCE_BASE = os.getenv('INSTANCE_BASE')
    CLIENT_ID = os.getenv('CLIENT_ID')
    CLIENT_SECRET = os.getenv('CLIENT_SECRET')
    ACCESS_TOKEN = os.getenv('ACCESS_TOKEN')
    ANNOUNCEMENT_FILE = os.getenv('ANNOUNCEMENT_FILE')
    RANDOM = os.getenv('RANDOM')
    IS_DOCKER = os.getenv('IS_DOCKER', False)

    if IS_DOCKER:
        last_id_file = str(Path('/data') / 'last_id')
        ANNOUNCEMENT_FILE = str(Path('/data') / ANNOUNCEMENT_FILE)
    else:
        last_id_file = str(Path('./txt') / 'last_id.txt')
        ANNOUNCEMENT_FILE = str(Path('./txt') / ANNOUNCEMENT_FILE)

    mastodon = Mastodon(
       client_id=CLIENT_ID,
       client_secret=CLIENT_SECRET,
       access_token=ACCESS_TOKEN,
       api_base_url=INSTANCE_BASE)

    if int(RANDOM):
        import random
        toot = random.choice(list(open(ANNOUNCEMENT_FILE, 'r')))
    else:
        last_id = 0
        with open(last_id_file) as f:
            last_id = int(f.read())
        with open(ANNOUNCEMENT_FILE, 'r') as a:
            toot = a.readlines()[last_id]
        with open(ANNOUNCEMENT_FILE, 'r') as a:
            length = len(a.readlines())
        last_id += 1 
        last_id %= length
        with open(last_id_file, 'w+') as f:
                f.write(str(last_id))
        
    if toot.startswith('IMG='):
        msg = toot.split(' ', 1)
        img = mastodon.media_post(msg[0].split('=')[1], "image/jpeg") 
        mastodon.status_post(msg[1].replace('\\n','\n'), media_ids=img['id'], visibility='unlisted')
    else:       
        mastodon.status_post(toot.replace('\\n','\n'), visibility='unlisted')


megafono()