# -*- 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 json
import logging
import os

from pungi.arch_utils import getBaseArch
from pungi.util import makedirs


def make_log_file(log_dir, filename):
    """Return path to log file with given name, if log_dir is set."""
    if not log_dir:
        return None
    makedirs(log_dir)
    return os.path.join(log_dir, '%s.log' % filename)


def get_ref_from_treefile(treefile, arch=None, logger=None):
    """
    Return ref name by parsing the tree config file. Replacing ${basearch} with
    the basearch of the architecture we are running on or of the passed in arch.
    """
    logger = logger or logging.getLogger(__name__)
    ref = None
    if os.path.isfile(treefile):
        with open(treefile, 'r') as f:
            try:
                parsed = json.loads(f.read())
                if arch is None:
                    basearch = getBaseArch()
                else:
                    basearch = getBaseArch(arch)
                ref = parsed['ref'].replace('${basearch}', basearch)
            except Exception as e:
                logger.error('Unable to get ref from treefile: %s' % e)
    else:
        logger.error('Unable to open treefile')
    return ref


def get_commitid_from_commitid_file(commitid_file, logger=None):
    """Return commit id which is read from the commitid file"""
    logger = logger or logging.getLogger(__name__)
    commitid = None
    if os.path.isfile(commitid_file):
        with open(commitid_file, 'r') as f:
            commitid = f.read().replace('\n', '')
    else:
        logger.error('Unable to find commitid file')
    return commitid


def tweak_treeconf(treeconf, source_repos=None, keep_original_sources=False, update_dict=None):
    """
    Update tree config file by adding new repos, and remove existing repos
    from the tree config file if 'keep_original_sources' is not enabled.
    Additionally, other values can be passed to method by 'update_dict' parameter to
    update treefile content.
    """
    treeconf_dir = os.path.dirname(treeconf)
    with open(treeconf, 'r') as f:
        treeconf_content = json.load(f)

    # backup the old tree config
    os.rename(treeconf, '{}.bak'.format(treeconf))

    repos = []
    if source_repos:
        # Sort to ensure reliable ordering
        source_repos = sorted(source_repos, key=lambda x: x['name'])
        # Now, since pungi includes timestamps in the repo names which
        # currently defeats rpm-ostree's change detection, let's just
        # use repos named 'repo-<number>'.
        # https://pagure.io/pungi/issue/811
        with open("{}/pungi.repo".format(treeconf_dir), 'w') as f:
            for i, repo in enumerate(source_repos):
                name = 'repo-{}'.format(i)
                f.write("[%s]\n" % name)
                f.write("name=%s\n" % name)
                f.write("baseurl=%s\n" % repo['baseurl'])
                exclude = repo.get('exclude', None)
                if exclude:
                    f.write("exclude=%s\n" % exclude)
                gpgcheck = '1' if repo.get('gpgcheck', False) else '0'
                f.write("gpgcheck=%s\n" % gpgcheck)

                repos.append(name)

    original_repos = treeconf_content.get('repos', [])
    if keep_original_sources:
        treeconf_content['repos'] = original_repos + repos
    else:
        treeconf_content['repos'] = repos

    # update content with config values from dictionary (for example 'ref')
    if isinstance(update_dict, dict):
        treeconf_content.update(update_dict)

    # update tree config to add new repos
    with open(treeconf, 'w') as f:
        json.dump(treeconf_content, f, indent=4)