#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import os
import logging
import argparse
import tarfile
import math

try:
    from boto.s3.connection import S3Connection
    from boto.s3.key import Key
except ImportError:
    raise ImportError("You have to install boto package 'pip install boto'")


class S3API(object):
    def __init__(self, access_key, secret_access_key, mds_api, mds_url):
        self.connection = S3Connection(
            host=mds_api,
            aws_access_key_id=access_key,
            aws_secret_access_key=secret_access_key,
        )
        self.mds_url = mds_url

    def upload_file(self, bucket_name, file_path, s3_path):
        logging.info("Start uploading file to bucket %s", bucket_name)

        bucket = self.connection.get_bucket(bucket_name)
        key = bucket.initiate_multipart_upload(s3_path)
        logging.info("Will upload to s3 path %s", s3_path)
        chunksize = 1024 * 1024 * 1024  # 1 GB
        filesize = os.stat(file_path).st_size
        logging.info("File size is %s", filesize)
        chunkcount = int(math.ceil(filesize / chunksize))

        def call_back(x, y):
            print("Uploaded {}/{} bytes".format(x, y))

        try:
            for i in range(chunkcount + 1):
                logging.info("Uploading chunk %s of %s", i, chunkcount + 1)
                offset = chunksize * i
                bytes_size = min(chunksize, filesize - offset)

                with open(file_path, "r") as fp:
                    fp.seek(offset)
                    key.upload_part_from_file(
                        fp=fp, part_num=i + 1, size=bytes_size, cb=call_back, num_cb=100
                    )
            key.complete_upload()
        except Exception as ex:
            key.cancel_upload()
            raise ex
        logging.info("Contents were set")
        return "https://{bucket}.{mds_url}/{path}".format(
            bucket=bucket_name, mds_url=self.mds_url, path=s3_path
        )

    def set_file_contents(self, bucket, local_file_path, s3_file_path):
        key = Key(bucket)
        key.key = s3_file_path
        file_size = os.stat(local_file_path).st_size
        logging.info(
            "Uploading file `%s` to `%s`. Size is %s",
            local_file_path,
            s3_file_path,
            file_size,
        )

        def call_back(x, y):
            print("Uploaded {}/{} bytes".format(x, y))

        key.set_contents_from_filename(local_file_path, cb=call_back)

    def upload_data_for_static_files_disk(self, bucket_name, directory_path, s3_path):
        bucket = self.connection.get_bucket(bucket_name)
        if s3_path.endswith("/"):
            s3_path += "store/"
        else:
            s3_path += "/store/"
        print(s3_path)
        for root, dirs, files in os.walk(directory_path):
            path = root.split(os.sep)
            for file in files:
                local_file_path = os.path.join(root, file)
                s3_file = local_file_path[len(directory_path) + 1 :]
                s3_file_path = os.path.join(s3_path, s3_file)
                self.set_file_contents(bucket, local_file_path, s3_file_path)

        logging.info("Uploading finished")
        return "https://{bucket}.{mds_url}/{path}".format(
            bucket=bucket_name, mds_url=self.mds_url, path=s3_path
        )

    def list_bucket_keys(self, bucket_name):
        bucket = self.connection.get_bucket(bucket_name)
        for obj in bucket.get_all_keys():
            print(obj.key)

    def remove_folder_from_bucket(self, bucket_name, folder_path):
        bucket = self.connection.get_bucket(bucket_name)
        bucket.get_all_keys()
        for obj in bucket.get_all_keys():
            if obj.key.startswith(folder_path):
                print("Removing " + obj.key)
                obj.delete()


def make_tar_file_for_table(clickhouse_data_path, db_name, table_name, tmp_prefix):
    relative_data_path = os.path.join("data", db_name, table_name)
    relative_meta_path = os.path.join("metadata", db_name, table_name + ".sql")
    path_to_data = os.path.join(clickhouse_data_path, relative_data_path)
    path_to_metadata = os.path.join(clickhouse_data_path, relative_meta_path)
    temporary_file_name = tmp_prefix + "/{tname}.tar".format(tname=table_name)
    with tarfile.open(temporary_file_name, "w") as bundle:
        bundle.add(path_to_data, arcname=relative_data_path)
        bundle.add(path_to_metadata, arcname=relative_meta_path)
    return temporary_file_name


USAGE_EXAMPLES = """
examples:
\t./s3uploader --dataset-name some_ds --access-key-id XXX --secret-access-key YYY --clickhouse-data-path /opt/clickhouse/ --table-name default.some_tbl --bucket-name some-bucket
\t./s3uploader --dataset-name some_ds --access-key-id XXX --secret-access-key YYY --file-path some_ds.tsv.xz --bucket-name some-bucket --s3-path /path/to/
"""

if __name__ == "__main__":
    logging.basicConfig(level=logging.INFO, format="%(asctime)s %(message)s")

    parser = argparse.ArgumentParser(
        description="Simple tool for uploading datasets to clickhouse S3",
        usage="%(prog)s [options] {}".format(USAGE_EXAMPLES),
    )
    parser.add_argument("--s3-api-url", default="s3.amazonaws.com")
    parser.add_argument("--s3-common-url", default="s3.amazonaws.com")
    parser.add_argument("--bucket-name", default="clickhouse-datasets")
    parser.add_argument(
        "--dataset-name",
        required=True,
        help="Name of dataset, will be used in uploaded path",
    )
    parser.add_argument("--access-key-id", required=True)
    parser.add_argument("--secret-access-key", required=True)
    parser.add_argument(
        "--clickhouse-data-path",
        default="/var/lib/clickhouse/",
        help="Path to clickhouse database on filesystem",
    )
    parser.add_argument("--s3-path", help="Path in s3, where to upload file")
    parser.add_argument(
        "--tmp-prefix", default="/tmp", help="Prefix to store temporary downloaded file"
    )
    data_group = parser.add_mutually_exclusive_group(required=True)
    table_name_argument = data_group.add_argument(
        "--table-name",
        help="Name of table with database, if you are uploading partitions",
    )
    data_group.add_argument("--file-path", help="Name of file, if you are uploading")
    data_group.add_argument(
        "--directory-path", help="Path to directory with files to upload"
    )
    data_group.add_argument(
        "--list-directory", help="List s3 directory by --directory-path"
    )
    data_group.add_argument(
        "--remove-directory", help="Remove s3 directory by --directory-path"
    )
    args = parser.parse_args()

    if args.table_name is not None and args.clickhouse_data_path is None:
        raise argparse.ArgumentError(
            table_name_argument,
            "You should specify --clickhouse-data-path to upload --table",
        )

    s3_conn = S3API(
        args.access_key_id, args.secret_access_key, args.s3_api_url, args.s3_common_url
    )

    file_path = ""
    directory_path = args.directory_path
    s3_path = args.s3_path

    if args.list_directory:
        s3_conn.list_bucket_keys(args.bucket_name)
    elif args.remove_directory:
        print("Removing s3 path: " + args.remove_directory)
        s3_conn.remove_folder_from_bucket(args.bucket_name, args.remove_directory)
    elif args.directory_path is not None:
        url = s3_conn.upload_data_for_static_files_disk(
            args.bucket_name, directory_path, s3_path
        )
        logging.info("Data uploaded: %s", url)
    else:
        if args.table_name is not None:
            if "." not in args.table_name:
                db_name = "default"
            else:
                db_name, table_name = args.table_name.split(".")
            file_path = make_tar_file_for_table(
                args.clickhouse_data_path, db_name, table_name, args.tmp_prefix
            )
        else:
            file_path = args.file_path

        if "tsv" in file_path:
            s3_path = os.path.join(
                args.dataset_name, "tsv", os.path.basename(file_path)
            )
        if args.table_name is not None:
            s3_path = os.path.join(
                args.dataset_name, "partitions", os.path.basename(file_path)
            )
        elif args.s3_path is not None:
            s3_path = os.path.join(
                args.dataset_name, args.s3_path, os.path.basename(file_path)
            )
        else:
            raise Exception("Don't know s3-path to upload")

        url = s3_conn.upload_file(args.bucket_name, file_path, s3_path)
        logging.info("Data uploaded: %s", url)