# -*- coding: utf-8 -*-


# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <https://gnu.org/licenses/>.


import os
import cPickle as pickle
import json

import pungi.wrappers.kojiwrapper
import pungi.phases.pkgset.pkgsets
from pungi.arch import get_valid_arches
from pungi.util import is_arch_multilib

from pungi.phases.pkgset.common import create_arch_repos, create_global_repo, populate_arch_pkgsets


import pungi.phases.pkgset.source


class PkgsetSourceKoji(pungi.phases.pkgset.source.PkgsetSourceBase):
    enabled = True

    def __call__(self):
        compose = self.compose
        koji_profile = compose.conf["koji_profile"]
        self.koji_wrapper = pungi.wrappers.kojiwrapper.KojiWrapper(koji_profile)
        # path prefix must contain trailing '/'
        path_prefix = self.koji_wrapper.koji_module.config.topdir.rstrip("/") + "/"
        package_sets = get_pkgset_from_koji(self.compose, self.koji_wrapper, path_prefix)
        return (package_sets, path_prefix)


def get_pkgset_from_koji(compose, koji_wrapper, path_prefix):
    event_info = get_koji_event_info(compose, koji_wrapper)
    tag_info = get_koji_tag_info(compose, koji_wrapper)

    pkgset_global = populate_global_pkgset(compose, koji_wrapper, path_prefix, tag_info, event_info)
    package_sets = populate_arch_pkgsets(compose, path_prefix, pkgset_global)
    package_sets["global"] = pkgset_global

    create_global_repo(compose, path_prefix)
    for arch in compose.get_arches():
        # TODO: threads? runroot?
        create_arch_repos(compose, arch, path_prefix)

    return package_sets


def populate_global_pkgset(compose, koji_wrapper, path_prefix, compose_tag, event_id):
    all_arches = set(["src"])
    for arch in compose.get_arches():
        is_multilib = is_arch_multilib(compose.conf, arch)
        arches = get_valid_arches(arch, is_multilib)
        all_arches.update(arches)

    compose_tag = compose.conf["pkgset_koji_tag"]
    inherit = compose.conf["pkgset_koji_inherit"]
    msg = "Populating the global package set from tag '%s'" % compose_tag
    global_pkgset_path = os.path.join(compose.paths.work.topdir(arch="global"), "pkgset_global.pickle")
    if compose.DEBUG and os.path.isfile(global_pkgset_path):
        compose.log_warning("[SKIP ] %s" % msg)
        pkgset = pickle.load(open(global_pkgset_path, "r"))
    else:
        compose.log_info(msg)
        pkgset = pungi.phases.pkgset.pkgsets.KojiPackageSet(koji_wrapper, compose.conf["sigkeys"],
                                                            logger=compose._logger, arches=all_arches)
        pkgset.populate(compose_tag, event_id, inherit=inherit)
        with open(global_pkgset_path, 'w') as f:
            f.write(pickle.dumps(pkgset))

    # write global package list
    pkgset.save_file_list(compose.paths.work.package_list(arch="global"),
                          remove_path_prefix=path_prefix)
    return pkgset


def get_koji_event_info(compose, koji_wrapper):
    koji_proxy = koji_wrapper.koji_proxy
    event_file = os.path.join(compose.paths.work.topdir(arch="global"), "koji-event")

    if compose.koji_event:
        koji_event = koji_proxy.getEvent(compose.koji_event)
        compose.log_info("Setting koji event to a custom value: %s" % compose.koji_event)
        json.dump(koji_event, open(event_file, "w"))
        return koji_event

    msg = "Getting koji event"
    if compose.DEBUG and os.path.exists(event_file):
        compose.log_warning("[SKIP ] %s" % msg)
        result = json.load(open(event_file, "r"))
    else:
        compose.log_info(msg)
        result = koji_proxy.getLastEvent()
        json.dump(result, open(event_file, "w"))
    compose.log_info("Koji event: %s" % result["id"])
    return result


def get_koji_tag_info(compose, koji_wrapper):
    koji_proxy = koji_wrapper.koji_proxy
    tag_file = os.path.join(compose.paths.work.topdir(arch="global"), "koji-tag")
    msg = "Getting a koji tag info"
    if compose.DEBUG and os.path.exists(tag_file):
        compose.log_warning("[SKIP ] %s" % msg)
        result = json.load(open(tag_file, "r"))
    else:
        compose.log_info(msg)
        tag_name = compose.conf["pkgset_koji_tag"]
        result = koji_proxy.getTag(tag_name)
        if result is None:
            raise ValueError("Unknown koji tag: %s" % tag_name)
        result["name"] = tag_name
        json.dump(result, open(tag_file, "w"))
    compose.log_info("Koji compose tag: %(name)s (ID: %(id)s)" % result)
    return result