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#!/usr/bin/env python3

import sys
import json
import argparse
import fatcat_client
from fatcat_client.rest import ApiException
from fatcat_tools.fcid import uuid2fcid

def run_export_releases(args):
    conf = fatcat_client.Configuration()
    conf.host = args.host_url
    api = fatcat_client.DefaultApi(fatcat_client.ApiClient(conf))

    for line in args.ident_file:
        ident = uuid2fcid(line.split()[0])
        release = api.get_release(id=ident, expand="all")
        args.json_output.write(json.dumps(release.to_dict()) + "\n")

def run_export_changelog(args):
    conf = fatcat_client.Configuration()
    conf.host = args.host_url
    api = fatcat_client.DefaultApi(fatcat_client.ApiClient(conf))

    end = args.end
    if end is None:
        latest = api.get_changelog(limit=1)[0]
        end = latest.index

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

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('--debug',
        action='store_true',
        help="enable debugging interface")
    parser.add_argument('--host-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.func(args)

if __name__ == '__main__':
    main()