#
# Copyright 2014 Chef Software, Inc.
#
# 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.
#

module Omnibus
  module Packager
    include Logging
    include Sugarable

    autoload :Base,     "omnibus/packagers/base"
    autoload :BFF,      "omnibus/packagers/bff"
    autoload :DEB,      "omnibus/packagers/deb"
    autoload :Makeself, "omnibus/packagers/makeself"
    autoload :MSI,      "omnibus/packagers/msi"
    autoload :APPX,     "omnibus/packagers/appx"
    autoload :PKG,      "omnibus/packagers/pkg"
    autoload :PKGSRC,   "omnibus/packagers/pkgsrc"
    autoload :Solaris,  "omnibus/packagers/solaris"
    autoload :IPS,      "omnibus/packagers/ips"
    autoload :RPM,      "omnibus/packagers/rpm"

    #
    # The list of Ohai platform families mapped to the respective packager
    # class.
    #
    # @return [Hash<String, Class>]
    #
    PLATFORM_PACKAGER_MAP = {
      "debian"   => DEB,
      "fedora"   => RPM,
      "suse"     => RPM,
      "rhel"     => RPM,
      "wrlinux"  => RPM,
      "aix"      => BFF,
      "solaris"  => Solaris,
      "ips"      => IPS,
      "windows"  => [MSI, APPX],
      "mac_os_x" => PKG,
      "smartos"  => PKGSRC,
    }.freeze

    #
    # Determine the packager(s) for the current system. This method returns the
    # class, not an instance of the class.
    #
    # @example
    #   Packager.for_current_system #=> [Packager::RPM]
    #
    # @return [[~Packager::Base]]
    #
    def for_current_system
      family = Ohai["platform_family"]
      version = Ohai["platform_version"]

      if family == "solaris2" && Chef::Sugar::Constraints::Version.new(version).satisfies?(">= 5.11")
        family = "ips"
      elsif family == "solaris2" && Chef::Sugar::Constraints::Version.new(version).satisfies?(">= 5.10")
        family = "solaris"
      end
      if klass = PLATFORM_PACKAGER_MAP[family]
        package_types = klass.is_a?(Array) ? klass : [ klass ]

        if package_types.include?(APPX) &&
            !Chef::Sugar::Constraints::Version.new(version).satisfies?(">= 6.2")
          log.warn(log_key) { "APPX generation is only supported on Windows versions 2012 and above" }
          package_types -= [APPX]
        end

        package_types
      else
        log.warn(log_key) do
          "Could not determine packager for `#{family}', defaulting " \
          "to `makeself'!"
        end
        [Makeself]
      end
    end
    module_function :for_current_system
  end
end