'''
    Command line behavior for centpkg
'''
#
# Author(s):
#            Jesse Keating <jkeating@redhat.com>
#            Pat Riehecky <riehecky@fnal.gov>
#            Brian Stinson <bstinson@ksu.edu>
#
# 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; either version 2 of the License, or (at your
# option) any later version.  See http://www.gnu.org/copyleft/gpl.html for
# the full text of the license.

from __future__ import print_function

import argparse
import textwrap

from centpkg.utils import config_get_safely, do_add_remote, do_fork
import centpkg.utils
from pyrpkg.cli import cliClient
from pyrpkg import rpkgError
from six.moves.urllib_parse import urlparse
import six.moves.configparser as ConfigParser

import json
import koji
import os
import sys

_DEFAULT_API_BASE_URL = 'https://gitlab.com'


class centpkgClient(cliClient):
    def __init__(self, config, name='centpkg'):
        self.DEFAULT_CLI_NAME = name

        # Save the config for utilities such as get_repo_name()
        centpkg.utils.dist_git_config = config
        centpkg.utils.dist_git_config.add_section('__default')
        centpkg.utils.dist_git_config.set('__default', 'cli_name', name)

        super(centpkgClient, self).__init__(config, name)

        self.setup_centos_subparsers()

    def setup_centos_subparsers(self):
        self.register_do_fork()
        self.register_request_gated_side_tag()

    def register_do_fork(self):
        help_msg = 'Create a new fork of the current repository'
        distgit_section = '{0}.distgit'.format(self.name)
        # uses default dist-git url in case section is not present
        try:
            distgit_api_base_url = config_get_safely(self.config, distgit_section, "apibaseurl")
        except rpkgError:
            distgit_api_base_url = _DEFAULT_API_BASE_URL
        description = textwrap.dedent('''
            Create a new fork of the current repository

            Before the operation, you need to generate an API token at
            https://{1}/-/profile/personal_access_tokens, select the "api"
            scope and save it in your local user configuration located
            at ~/.config/rpkg/{0}.conf. For example:

                [{0}.distgit]
                token = <api_key_here>

            Below is a basic example of the command to fork a current repository:

                {0} fork
        '''.format(self.name, urlparse(distgit_api_base_url).netloc))

        fork_parser = self.subparsers.add_parser(
            'fork',
            formatter_class=argparse.RawDescriptionHelpFormatter,
            help=help_msg,
            description=description)
        fork_parser.set_defaults(command=self.do_distgit_fork)

    def do_distgit_fork(self):
        """create fork of the distgit repository
        That includes creating fork itself using API call and then adding
        remote tracked repository
        """
        distgit_section = '{0}.distgit'.format(self.name)
        distgit_api_base_url = config_get_safely(self.config, distgit_section, "apibaseurl")
        distgit_token = config_get_safely(self.config, distgit_section, 'token')

        ret, repo_path = do_fork(
            logger=self.log,
            base_url=distgit_api_base_url,
            token=distgit_token,
            repo_name=self.cmd.repo_name,
            namespace=self.cmd.ns,
            cli_name=self.name,
        )

        # assemble url of the repo in web browser
        fork_url = '{0}/{1}'.format(
            distgit_api_base_url.rstrip('/'),
            repo_path,
        )

        if ret:
            msg = "Fork of the repository has been created: '{0}'"
        else:
            msg = "Repo '{0}' already exists."
        self.log.info(msg.format(fork_url))

        distgit_remote_base_url = self.config.get(
            '{0}'.format(self.name),
            "gitbaseurl",
            vars={'repo': '{0}/{1}'.format(self.cmd.ns, self.cmd.repo_name)},
        )
        remote_name = repo_path.split('/')[0]

        ret = do_add_remote(
            base_url=distgit_api_base_url,
            remote_base_url=distgit_remote_base_url,
            repo=self.cmd.repo,
            repo_path=repo_path,
            remote_name=remote_name,
        )
        if ret:
            msg = "Adding as remote '{0}'."
        else:
            msg = "Remote with name '{0}' already exists."
        self.log.info(msg.format(remote_name))

    # Overloaded build
    def register_build(self):
        # Do all the work from the super class
        super(centpkgClient, self).register_build()
        build_parser = self.subparsers.choices['build']
        build_parser.formatter_class = argparse.RawDescriptionHelpFormatter
        build_parser.description = textwrap.dedent('''
            {0}

            centpkg now sets the rhel metadata with --rhel-target.
             * exception - This will build for the current in-development Y-stream release.
               It is equivalent to passing latest when not in the Blocker and Exception Phase.
             * zstream - If pre-GA of a y-stream release, this will build for 0day.
               If post-GA of a Y-stream release, this will build for the Z-stream of that release.
             * latest - This will always build for the next Y-stream release

        '''.format('\n'.join(textwrap.wrap(build_parser.description))))

        # Now add our additional option
        build_parser.add_argument(
            '--rhel-target',
            choices=['exception', 'zstream', 'latest'],
            help='Set the rhel-target metadata')

    # Overloaded _build
    def _build(self, sets=None):

        # Only do rhel-target if we are centpkg, not centpkg-sig
        if not os.path.basename(sys.argv[0]).endswith('-sig'):

            # Only run if we have internal configuraions, or scratch
            internal_config_file = "/etc/rpkg/centpkg_internal.conf"
            if os.path.exists(internal_config_file):
                # Get our internal only variables
                cfg = ConfigParser.SafeConfigParser()
                cfg.read(internal_config_file)
                pp_api_url = config_get_safely(cfg, "centpkg.internal", 'pp_api_url')
                gitbz_query_url = config_get_safely(cfg, "centpkg.internal", 'gitbz_query_url')
                rhel_dist_git = config_get_safely(cfg, "centpkg.internal", 'rhel_dist_git')

                # Find out divergent branch and stabalization
                self.log.info("Checking rhel-target information:")
                stream_version = self.cmd.target.split('-')[0]
                rhel_version = centpkg.utils.stream_mapping(stream_version)
                active_y, in_stabilization = centpkg.utils.determine_active_y_version(rhel_version, pp_api_url)
                divergent_branch = centpkg.utils.does_divergent_branch_exist(
                                        self.cmd.repo_name,
                                        rhel_version,
                                        rhel_dist_git,
                                        pp_api_url,
                                        "rpms")

                # Good to know
                if divergent_branch :
                    self.log.info("    a divergent branch was found.")
                else:
                    self.log.info("    a divergent branch was not found.")
                if in_stabilization :
                    self.log.info("    we are in stabilization mode.")
                else:
                    self.log.info("    we are not in stabilization mode.")

                # Update args.custom_user_metadata
                if hasattr(self.args, 'custom_user_metadata') and self.args.custom_user_metadata:
                    try:
                        temp_custom_user_metadata = json.loads(self.args.custom_user_metadata)
                    # Use ValueError instead of json.JSONDecodeError for Python 2 and 3 compatibility
                    except ValueError as e:
                        self.parser.error("--custom-user-metadata is not valid JSON: %s" % e)
                    if not isinstance(temp_custom_user_metadata, dict):
                        self.parser.error("--custom-user-metadata must be a JSON object")
                    if hasattr(self.args, 'rhel_target') and self.args.rhel_target:
                        temp_custom_user_metadata["rhel-target"] = self.args.rhel_target
                    else:
                        if divergent_branch:
                            temp_custom_user_metadata["rhel-target"] = "latest"
                        elif not divergent_branch and not in_stabilization :
                            temp_custom_user_metadata["rhel-target"] = "zstream"
                        else:
                            self.log.info("We are currently in Stabalization mode")
                            self.log.info("You must either set the rhel-target (--rhel-target)")
                            self.log.info("or branch for the previous version.")
                            self.log.info("Exiting")
                            raise SystemExit
                    self.args.custom_user_metadata = json.dumps(temp_custom_user_metadata)
                else:
                    if hasattr(self.args, 'rhel_target') and self.args.rhel_target:
                        temp_custom_user_metadata = {"rhel-target": self.args.rhel_target}
                        self.args.custom_user_metadata = json.dumps(temp_custom_user_metadata)
                    else:
                        if divergent_branch:
                            self.args.custom_user_metadata = '{"rhel-target": "latest"}'
                        elif not divergent_branch and not in_stabilization :
                            self.args.custom_user_metadata = '{"rhel-target": "zstream"}'
                        else:
                            self.log.info("We are currently in Stabalization mode")
                            self.log.info("You must either set the rhel-target (--rhel-target)")
                            self.log.info("or branch for the previous version.")
                            self.log.info("Exiting")
                            raise SystemExit

                # Good to know
                self.log.info("    rhel-target: " + json.loads(self.args.custom_user_metadata)['rhel-target'])

            else:
                if not self.args.scratch:
                    self.log.info("NO SCRATCH BUILD")
                    self.log.info("Only scratch builds are allowed without internal configurations")
                    self.log.info("Exiting")
                    raise SystemExit

        # Proceed with build
        return super(centpkgClient, self)._build(sets)


    def register_request_gated_side_tag(self):
        """Register command line parser for subcommand request-gated-side-tag"""
        parser = self.subparsers.add_parser(
            "request-gated-side-tag",
            help="Create a new dynamic gated side tag",
        )
        parser.add_argument("--base-tag", help="name of base tag")
        parser.set_defaults(command=self.request_gated_side_tag)

    def request_gated_side_tag(self):
        self.args.suffix = "stack-gate"
        super(centpkgClient, self).request_side_tag()