#!/usr/bin/env python
# Copyright (C) 2015 Wayne Warren
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

import logging
import sys
import time

from jenkins_jobs.builder import JenkinsManager
from jenkins_jobs.parser import YamlParser
from jenkins_jobs.registry import ModuleRegistry
from jenkins_jobs.xml_config import XmlJobGenerator
from jenkins_jobs.xml_config import XmlViewGenerator
from jenkins_jobs.errors import JenkinsJobsException
import jenkins_jobs.cli.subcommand.base as base


logger = logging.getLogger(__name__)


class UpdateSubCommand(base.BaseSubCommand):
    def parse_arg_path(self, parser):
        parser.add_argument(
            "path",
            nargs="?",
            default=sys.stdin,
            help="colon-separated list of paths to YAML files " "or directories",
        )

    def parse_arg_names(self, parser):
        parser.add_argument("names", help="name(s) of job(s)", nargs="*")

    def parse_args(self, subparser):
        update = subparser.add_parser("update")

        self.parse_option_recursive_exclude(update)

        self.parse_arg_path(update)
        self.parse_arg_names(update)

        update.add_argument(
            "--delete-old",
            action="store_true",
            dest="delete_old",
            default=False,
            help="delete obsolete jobs",
        )
        update.add_argument(
            "-p",
            "--plugin-info",
            dest="plugins_info_path",
            default=None,
            help="path to plugin info YAML file. Can be used to provide "
            "previously retrieved plugins info when connecting credentials "
            "don't have permissions to query.",
        )
        update.add_argument(
            "--workers",
            type=int,
            default=1,
            dest="n_workers",
            help="number of workers to use, 0 for autodetection and 1 "
            "for just one worker.",
        )
        update.add_argument(
            "--existing-only",
            action="store_true",
            default=False,
            dest="existing_only",
            help="update existing jobs only",
        )

        update_type = update.add_mutually_exclusive_group()
        update_type.add_argument(
            "-j",
            "--jobs-only",
            action="store_const",
            dest="update",
            const="jobs",
            help="update only jobs",
        )
        update_type.add_argument(
            "-v",
            "--views-only",
            action="store_const",
            dest="update",
            const="views",
            help="update only views",
        )

    def _generate_xmljobs(self, options, jjb_config=None):
        builder = JenkinsManager(jjb_config)

        logger.info("Updating jobs in {0} ({1})".format(options.path, options.names))
        orig = time.time()

        # Generate XML
        parser = YamlParser(jjb_config)
        registry = ModuleRegistry(jjb_config, builder.plugins_list)
        xml_job_generator = XmlJobGenerator(registry)
        xml_view_generator = XmlViewGenerator(registry)

        parser.load_files(options.path)
        registry.set_parser_data(parser.data)

        job_data_list, view_data_list = parser.expandYaml(registry, options.names)

        xml_jobs = xml_job_generator.generateXML(job_data_list)
        xml_views = xml_view_generator.generateXML(view_data_list)

        jobs = parser.jobs
        step = time.time()
        logging.debug("%d XML files generated in %ss", len(jobs), str(step - orig))

        return builder, xml_jobs, xml_views

    def execute(self, options, jjb_config):
        if options.n_workers < 0:
            raise JenkinsJobsException(
                "Number of workers must be equal or greater than 0"
            )

        builder, xml_jobs, xml_views = self._generate_xmljobs(options, jjb_config)

        if options.update == "jobs":
            jobs, num_updated_jobs = builder.update_jobs(
                xml_jobs,
                n_workers=options.n_workers,
                existing_only=options.existing_only,
            )
            logger.info("Number of jobs updated: %d", num_updated_jobs)
        elif options.update == "views":
            views, num_updated_views = builder.update_views(
                xml_views,
                n_workers=options.n_workers,
                existing_only=options.existing_only,
            )
            logger.info("Number of views updated: %d", num_updated_views)
        else:
            jobs, num_updated_jobs = builder.update_jobs(
                xml_jobs,
                n_workers=options.n_workers,
                existing_only=options.existing_only,
            )
            logger.info("Number of jobs updated: %d", num_updated_jobs)
            views, num_updated_views = builder.update_views(
                xml_views,
                n_workers=options.n_workers,
                existing_only=options.existing_only,
            )
            logger.info("Number of views updated: %d", num_updated_views)

        keep_jobs = [job.name for job in xml_jobs]
        if options.delete_old:
            n = builder.delete_old_managed(keep=keep_jobs)
            logger.info("Number of jobs deleted: %d", n)