#!/usr/bin/python3

from pathlib import Path
from subprocess import call
from datetime import datetime
from typing import List

KEEP_DAYS = 3

def main():
    build_images()
    update_containers()
    prune()


def build_images():
    images = read_file(Path('images.conf'))
    today = datetime.now().strftime('%Y%m%d')
    for image in images:
        path = Path(f'../images/{image}')
        call(['docker', 'build', '--no-cache', f'--tag={image}-panthera:{today}', '.'],
               cwd=path)


def update_containers():
    containers = read_file(Path('container.conf'))
    for container in containers:
        path = Path(f'../container/{container}')
        call(['docker-compose', 'pull'],
               cwd=path)
        call(['docker-compose', 'up', '-d'],
               cwd=path)


def read_file(path: Path) -> List[str]:
    content = path.read_text().strip()
    elements = content.split('\n')
    elements = [item for item in elements if not item.startswith('#')]
    return elements


def prune():
    hours = int(KEEP_DAYS * 24)
    call(['docker', 'system', 'prune', '--all', '--force', '--filter', f'until={hours}h'])

if __name__ == "__main__":
    main()