#
# Author:: Joshua Timberman (<jtimberman@chef.io>)
# Author:: Graeme Mathieson (<mathie@woss.name>)
#
# Copyright:: Copyright (c) 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.
#

require_relative "../resource"
require_relative "../mixin/homebrew_user"

class Chef
  class Resource
    class HomebrewCask < Chef::Resource

      provides(:homebrew_cask) { true }

      description "Use the **homebrew_cask** resource to install binaries distributed via the Homebrew package manager."
      introduced "14.0"

      include Chef::Mixin::HomebrewUser

      property :cask_name, String,
        description: "An optional property to set the cask name if it differs from the resource block's name.",
        regex: %r{^[\w/\-@]+$},
        validation_message: "The provided Homebrew cask name is not valid. Cask names can contain alphanumeric characters, _, -, or / only!",
        name_property: true

      property :options, String,
        description: "Options to pass to the brew command during installation."

      property :install_cask, [TrueClass, FalseClass],
        description: "Automatically install the Homebrew cask tap, if necessary.",
        default: true

      property :homebrew_path, String,
        description: "The path to the homebrew binary.",
        default: "/usr/local/bin/brew"

      property :owner, [String, Integer],
        description: "The owner of the Homebrew installation.",
        default: lazy { find_homebrew_username },
        default_description: "Calculated default username"\

      action :install, description: "Install an application that is packaged as a Homebrew cask." do
        if new_resource.install_cask
          homebrew_tap "homebrew/cask" do
            homebrew_path new_resource.homebrew_path
            owner new_resource.owner
          end
        end

        unless casked?
          converge_by("install cask #{new_resource.cask_name} #{new_resource.options}") do
            shell_out!("#{new_resource.homebrew_path} install --cask #{new_resource.cask_name} #{new_resource.options}",
              user: new_resource.owner,
              env:  { "HOME" => ::Dir.home(new_resource.owner), "USER" => new_resource.owner },
              cwd: ::Dir.home(new_resource.owner))
          end
        end
      end

      action :remove, description: "Remove an application that is packaged as a Homebrew cask." do
        if new_resource.install_cask
          homebrew_tap "homebrew/cask" do
            homebrew_path new_resource.homebrew_path
            owner new_resource.owner
          end
        end

        if casked?
          converge_by("uninstall cask #{new_resource.cask_name}") do
            shell_out!("#{new_resource.homebrew_path} uninstall --cask #{new_resource.cask_name}",
              user: new_resource.owner,
              env:  { "HOME" => ::Dir.home(new_resource.owner), "USER" => new_resource.owner },
              cwd: ::Dir.home(new_resource.owner))
          end
        end
      end

      action_class do
        alias_method :action_cask, :action_install
        alias_method :action_uncask, :action_remove
        alias_method :action_uninstall, :action_remove

        # Is the desired cask already casked?
        #
        # @return [Boolean]
        def casked?
          unscoped_name = new_resource.cask_name.split("/").last
          shell_out!("#{new_resource.homebrew_path} list --cask 2>/dev/null",
            user: new_resource.owner,
            env:  { "HOME" => ::Dir.home(new_resource.owner), "USER" => new_resource.owner },
            cwd: ::Dir.home(new_resource.owner)).stdout.split.include?(unscoped_name)
        end
      end
    end
  end
end
