#!/usr/bin/env python3
"""
Apply elasticsearch mappings to given hosts.
"""
import argparse
import json
from pathlib import Path
from typing import Optional, Sequence, Tuple

from elasticsearch import Elasticsearch

HERE = Path(__file__).resolve().parent


def apply_mappings_to_cluster(
    hosts: Sequence, key: Optional[str] = None, es_args: dict = None, http_auth: Tuple = None
):
    """Hosts maybe a sequence of strings or dicts in the form {"host": <host>, "port": <port>}"""

    def _send_template(f):
        with f.open() as json_data:
            data = json.load(json_data)
            template_name = f.stem
            res = es.indices.put_template(name=template_name, body=data)
            return {"mapping": template_name, "result": res}

    p = HERE / "mappings"
    if key:
        files = (p / key).glob("*.json")
    else:
        files = p.glob("**/*.json")

    es = Elasticsearch(hosts=hosts, http_auth=http_auth, **(es_args or {}))
    return [_send_template(f) for f in files]


def parse_args():
    parser = argparse.ArgumentParser(
        description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter
    )
    parser.add_argument("--key", help="host key, e.g. events, datasets etc.")
    parser.add_argument(
        "--hosts",
        nargs="+",
        help="list of es hosts from the same cluster, where each host is http[s]://[user:password@]host:port",
    )
    return parser.parse_args()


def main():
    args = parse_args()
    print(">>>>> Applying mapping to " + str(args.hosts))
    res = apply_mappings_to_cluster(args.hosts, args.key)
    print(res)


if __name__ == "__main__":
    main()