#!/usr/bin/env python
# -*- coding: utf-8 -*-


import os
import sys
import argparse

import pungi.ks
from pungi.dnf_wrapper import DnfWrapper, Conf
from pungi.gather_dnf import Gather, GatherOptions


def get_parser():
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--arch",
        required=True,
    )
    parser.add_argument(
        "--config",
        metavar="PATH",
        required=True,
        help="path to kickstart config file",
    )

    group = parser.add_argument_group("Repository options")
    group.add_argument(
        "--lookaside",
        action="append",
        metavar="[REPOID]",
        help="lookaside repositories",
    )

    group = parser.add_argument_group("Gather options")
    group.add_argument(
        "--nodeps",
        action="store_true",
        help="disable resolving dependencies",
    )
    group.add_argument(
        "--selfhosting",
        action="store_true",
        help="build a self-hosting tree by following build dependencies (optional)",
    )
    group.add_argument(
        "--fulltree",
        action="store_true",
        help="build a tree that includes all packages built from corresponding source rpms (optional)",
    )
    group.add_argument(
        "--greedy",
        metavar="METHOD",
        # TODO: read choices from library
        choices=["none", "all", "build"],
    )
    group.add_argument(
        "--multilib",
        metavar="[METHOD]",
        action="append",
    )
    return parser


def main():
    parser = get_parser()
    ns = parser.parse_args()

    dnf_conf = Conf(ns.arch)
    dnf_obj = DnfWrapper(dnf_conf)

    gather_opts = GatherOptions()

    if ns.greedy:
        gather_opts.greedy_method = ns.greedy

    if ns.multilib:
        gather_opts.multilib_methods = ns.multilib

    if ns.lookaside:
        gather_opts.lookaside_repos = ns.lookaside

    if ns.fulltree:
        gather_opts.fulltree = True

    if ns.selfhosting:
        gather_opts.selfhosting = True

    if ns.nodeps:
        gather_opts.resolve_deps = False

    ksparser = pungi.ks.get_ksparser(ns.config)

    # read repos from ks
    for ks_repo in ksparser.handler.repo.repoList:
        # HACK: lookaside repos first; this is workaround for no repo priority handling in hawkey
        if ks_repo.name not in gather_opts.lookaside_repos:
            continue
        dnf_obj.add_repo(ks_repo.name, ks_repo.baseurl)

    for ks_repo in ksparser.handler.repo.repoList:
        if ks_repo.name in gather_opts.lookaside_repos:
            continue
        dnf_obj.add_repo(ks_repo.name, ks_repo.baseurl)

    dnf_obj.fill_sack(load_system_repo=False, load_available_repos=True)
    dnf_obj.read_comps()

    gather_opts.langpacks = dnf_obj.comps_wrapper.get_langpacks()
    gather_opts.multilib_blacklist = ksparser.handler.multilib_blacklist
    gather_opts.multilib_whitelist = ksparser.handler.multilib_whitelist
    gather_opts.prepopulate = ksparser.handler.prepopulate
    gather_opts.fulltree_excludes = ksparser.handler.fulltree_excludes

    g = Gather(dnf_obj, gather_opts)

    packages, conditional_packages = ksparser.get_packages(dnf_obj)
    excluded = ksparser.get_excluded_packages(dnf_obj)

    for i in excluded:
        packages.add("-%s" % i)

    g.gather(packages, conditional_packages)

    print_rpms(g)


def _get_flags(gather_obj, pkg):
    flags = gather_obj.result_package_flags.get(pkg, [])
    flags = "(%s)" % ",".join(sorted(flags))
    return flags


def _get_url(pkg):
    if pkg.baseurl:
        result = os.path.join(pkg.baseurl, pkg.location)
    else:
        result = os.path.join(pkg.repo.baseurl[0], pkg.location)
    return result


def print_rpms(gather_obj):
    for pkg in sorted(gather_obj.result_binary_packages):
        print "RPM%s: %s" % (_get_flags(gather_obj, pkg), _get_url(pkg))

    for pkg in sorted(gather_obj.result_debug_packages):
        print "DEBUGINFO%s: %s" % (_get_flags(gather_obj, pkg), _get_url(pkg))

    for pkg in sorted(gather_obj.result_source_packages):
        print "SRPM%s: %s" % (_get_flags(gather_obj, pkg), _get_url(pkg))


if __name__ == "__main__":
    main()