#!/usr/bin/python3

import datetime
import dnf
import json
import sys


def timestamp_to_rfc3339(timestamp):
    d = datetime.datetime.utcfromtimestamp(package.buildtime)
    return d.strftime('%Y-%m-%dT%H:%M:%SZ')


def dnfrepo(desc, parent_conf=None):
    """Makes a dnf.repo.Repo out of a JSON repository description"""

    repo = dnf.repo.Repo(desc["id"], parent_conf)
    repo.name = desc["name"]

    if "baseurl" in desc:
        repo.baseurl = desc["baseurl"]
    elif "metalink" in desc:
        repo.metalink = desc["metalink"]
    elif "mirrorlist" in desc:
        repo.metalink = desc["mirrorlist"]
    else:
        assert False

    return repo


def create_base(repos):
    base = dnf.Base()

    for repo in repos:
        base.repos.add(dnfrepo(repo, base.conf))

    base.fill_sack(load_system_repo=False)
    return base


call = json.load(sys.stdin)
command = call["command"]
arguments = call.get("arguments", {})

if command == "dump":
    base = create_base(arguments.get("repos", {}))
    packages = []
    for package in base.sack.query().available():
        packages.append({
            "name": package.name,
            "summary": package.summary,
            "description": package.description,
            "url": package.url,
            "epoch": package.epoch,
            "version": package.version,
            "release": package.release,
            "arch": package.arch,
            "buildtime": timestamp_to_rfc3339(package.buildtime),
            "license": package.license
        })
    json.dump(packages, sys.stdout)

elif command == "depsolve":
    base = create_base(arguments.get("repos", {}))
    base.install_specs(arguments["package-specs"])
    base.resolve()
    packages = []
    for package in base.transaction.install_set:
        packages.append({
            "name": package.name,
            "epoch": package.epoch,
            "version": package.version,
            "release": package.release,
            "arch": package.arch
        })
    json.dump(packages, sys.stdout)