#!/usr/local/bin/python

import json
import logging
import pathlib
import sys

import minio


def main():
    logger = logging.getLogger()
    logger.setLevel(logging.DEBUG)

    handler = logging.StreamHandler(sys.stdout)
    handler.setLevel(logging.DEBUG)
    formatter = logging.Formatter(
        "%(asctime)s - %(name)s - %(levelname)s - %(message)s"
    )
    handler.setFormatter(formatter)
    logger.addHandler(handler)

    # Load the user configuration.
    with open("/data/options.json", "r") as f:
        config = json.load(f)

    client = minio.Minio(
        config["minio_url"],
        access_key=config["minio_access_key"],
        secret_key=config["minio_secret_key"],
    )
    logger.info("Created minio client")

    found = client.bucket_exists(config["minio_bucket"])
    if not found:
        logger.warning("Creating bucket %s", config["minio_bucket"])
        client.make_bucket(config["minio_bucket"])
    else:
        logger.info("Bucket %s already exists.", config["minio_bucket"])

    backup_folder = pathlib.Path("/backup")
    backup_files = list(backup_folder.iterdir())
    logger.info("Found the folllowing files in /backup: %s", backup_files)

    objects = {x.object_name: x for x in client.list_objects(config["minio_bucket"])}
    logger.info("Found the following files in s3: %s", objects.keys())

    to_upload = []
    for file in backup_files:
        if file.name not in objects.keys():
            to_upload.append(file)
        else:
            obj = objects[file.name]
            logger.info("File %s already exists in s3", file.name)
            if obj.size != file.stat().st_size:
                logger.warning(
                    "Size in s3 (%s) is different to local size (%s)",
                    str(obj.size[0]),
                    str(file.stat().st_size),
                )

    logger.warning(
        "The following files do not already exist and will be backed up: %s", to_upload
    )

    for file in to_upload:
        client.fput_object(
            config["minio_bucket"],
            file.name,
            str(file.resolve()),
        )
        logger.warning("Uploaded %s", file.name)

    logger.info("Done")


if __name__ == "__main__":
    main()