#!/usr/bin/env python3

"""
Note: this is *not* the tool used to generate "official" metadata dumps; that
tool is written in rust and runs on the production infrastructure for speed.
These scripts are just a demonstration of how the API *could* be scraped
without permission by an third party.
"""

import argparse
import json
import sys

from fatcat_tools import entity_to_dict, public_api, uuid2fcid


def run_export_releases(args: argparse.Namespace) -> None:
    for line in args.ident_file:
        ident = uuid2fcid(line.split()[0])
        release = args.api.get_release(ident=ident, expand="all")
        args.json_output.write(
            json.dumps(entity_to_dict(release), api_client=args.api.api_client) + "\n"
        )


def run_export_changelog(args: argparse.Namespace) -> None:
    end = args.end
    if end is None:
        latest = args.api.get_changelog(limit=1)[0]
        end = latest.index

    for i in range(args.start, end):
        entry = args.api.get_changelog_entry(index=i)
        args.json_output.write(
            json.dumps(entity_to_dict(entry, api_client=args.api.api_client)) + "\n"
        )


def main() -> None:
    parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument(
        "--fatcat-api-url", default="http://localhost:9411/v0", help="connect to this host/port"
    )
    subparsers = parser.add_subparsers()

    sub_releases = subparsers.add_parser("releases")
    sub_releases.set_defaults(func=run_export_releases)
    sub_releases.add_argument(
        "ident_file",
        help="TSV list of fatcat release idents to dump",
        default=sys.stdin,
        type=argparse.FileType("r"),
    )
    sub_releases.add_argument(
        "json_output",
        help="where to send output",
        default=sys.stdout,
        type=argparse.FileType("w"),
    )

    sub_changelog = subparsers.add_parser("changelog")
    sub_changelog.set_defaults(func=run_export_changelog)
    sub_changelog.add_argument("--start", help="index to start dumping at", default=1, type=int)
    sub_changelog.add_argument(
        "--end",
        help="index to stop dumping at (else detect most recent)",
        default=None,
        type=int,
    )
    sub_changelog.add_argument(
        "json_output",
        help="where to send output",
        default=sys.stdout,
        type=argparse.FileType("w"),
    )

    args = parser.parse_args()
    if not args.__dict__.get("func"):
        print("tell me what to do!")
        sys.exit(-1)

    args.api = public_api(args.fatcat_api_url)
    args.func(args)


if __name__ == "__main__":
    main()