#
# Cookbook:: omnibus_updater
# Recipe:: downloader
#
# Copyright:: 2014-2017, Heavy Water Ops, LLC
#
# 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.
#

# NOTE: This recipe is here for others that just want the
# package, not the actual installation (lxc for example)

if node['omnibus_updater']['direct_url']
  remote_path = node['omnibus_updater']['direct_url']
else
  version = node['omnibus_updater']['version'] || ''
  remote_path = OmnibusTrucker.url(
    OmnibusTrucker.build_url(node,
      version: node['omnibus_updater']['force_latest'] ? nil : version.sub(/\-.+$/, ''),
      prerelease: node['omnibus_updater']['preview']
                            ), node
  )
  raise 'Could not construct URL for chef-download' if remote_path.nil?
end

if remote_path
  node.normal['omnibus_updater']['full_url'] = remote_path

  directory node['omnibus_updater']['cache_dir'] do
    recursive true
  end

  remote_file "omnibus_remote[#{File.basename(remote_path)}]" do
    path File.join(node['omnibus_updater']['cache_dir'], File.basename(remote_path))
    source remote_path
    backup false
    checksum node['omnibus_updater']['checksum'] if node['omnibus_updater']['checksum']
    action :create_if_missing
    only_if do
      unless (version = node['omnibus_updater']['version'])
        version = case node['platform_family']
                  when 'windows'
                    node['omnibus_updater']['full_url'].scan(/chef-windows|client-(\d+\.\d+.\d+)/).flatten.first
                  else
                    node['omnibus_updater']['full_url'].scan(/chef[_-](\d+\.\d+.\d+)/).flatten.first
                  end
      end
      if node['omnibus_updater']['always_download']
        # warn if there may be unexpected behavior
        node['omnibus_updater']['prevent_downgrade'] &&
          Chef::Log.warn('omnibus_updater: prevent_downgrade is ignored when always_download is true')
        Chef::Log.debug "Omnibus Updater remote path: #{remote_path}"
        true
      elsif node['omnibus_updater']['prevent_downgrade']
        # Return true if the found/specified version is newer
        Gem::Version.new(version.to_s.sub(/\-.+$/, '')) > Gem::Version.new(Chef::VERSION)
      else
        # default is to install if the versions don't match
        Chef::VERSION != version.to_s.sub(/\-.+$/, '')
      end
    end
  end
else
  Chef::Log.warn 'Failed to retrieve omnibus download URL'
end

include_recipe 'omnibus_updater::old_package_cleaner'
