#
# Author:: Adam Jacob (<adam@opscode.com>)
# Copyright:: Copyright (c) 2008 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# 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 'spec_helper'

describe "Chef::Platform supports" do
  [
    :mac_os_x,
    :mac_os_x_server,
    :freebsd,
    :ubuntu,
    :debian,
    :centos,
    :fedora,
    :suse,
    :redhat,
    :oracle,
    :gentoo,
    :arch, 
    :solaris,
    :mswin,
    :mingw32,
    :windows
  ].each do |platform|
    it "#{platform}" do
      Chef::Platform.platforms.should have_key(platform)
    end
  end
end

describe Chef::Platform do

  before :all do
    @original_platform_map = Chef::Platform.platforms
  end
  
  after :all do ||
    Chef::Platform.platforms = @original_platform_map
  end
  
  before(:each) do
    Chef::Platform.platforms = {
      :darwin => {
        "9.2.2" => {
          :file => "darwinian",
          :else => "thing"
        },
        :default => {
          :file => "old school",
          :snicker => "snack"
        }
      },
      :mars_volta => {
      },
      :default => {
        :file => Chef::Provider::File,
        :pax => "brittania",
        :cat => "nice"
      }
    }
    @events = Chef::EventDispatch::Dispatcher.new
  end
  
  it "should allow you to look up a platform by name and version, returning the provider map for it" do
    pmap = Chef::Platform.find("Darwin", "9.2.2")
    pmap.should be_a_kind_of(Hash)
    pmap[:file].should eql("darwinian")
  end
  
  it "should use the default providers for an os if the specific version does not exist" do
    pmap = Chef::Platform.find("Darwin", "1")
    pmap.should be_a_kind_of(Hash)
    pmap[:file].should eql("old school")
  end
  
  it "should use the default providers if the os doesn't give me a default, but does exist" do
    pmap = Chef::Platform.find("mars_volta", "1")
    pmap.should be_a_kind_of(Hash)
    pmap[:file].should eql(Chef::Provider::File)
  end
  
  it "should use the default provider if the os does not exist" do
    pmap = Chef::Platform.find("AIX", "1")
    pmap.should be_a_kind_of(Hash)
    pmap[:file].should eql(Chef::Provider::File)
  end
  
  it "should merge the defaults for an os with the specific version" do
    pmap = Chef::Platform.find("Darwin", "9.2.2")
    pmap[:file].should eql("darwinian")
    pmap[:snicker].should eql("snack")
  end
  
  it "should merge the defaults for an os with the universal defaults" do
    pmap = Chef::Platform.find("Darwin", "9.2.2")
    pmap[:file].should eql("darwinian")
    pmap[:pax].should eql("brittania")
  end
  
  it "should allow you to look up a provider for a platform directly by symbol" do
    Chef::Platform.find_provider("Darwin", "9.2.2", :file).should eql("darwinian")
  end
  
  it "should raise an exception if a provider cannot be found for a resource type" do
    lambda { Chef::Platform.find_provider("Darwin", "9.2.2", :coffee) }.should raise_error(ArgumentError)
  end
  
  it "should look up a provider for a resource with a Chef::Resource object" do
    kitty = Chef::Resource::Cat.new("loulou")
    Chef::Platform.find_provider("Darwin", "9.2.2", kitty).should eql("nice")
  end
  
  it "should look up a provider with a node and a Chef::Resource object" do
    kitty = Chef::Resource::Cat.new("loulou")    
    node = Chef::Node.new
    node.name("Intel")
    node.automatic_attrs[:platform] = "mac_os_x"
    node.automatic_attrs[:platform_version] = "9.2.2"
    Chef::Platform.find_provider_for_node(node, kitty).should eql("nice")
  end

  it "should prefer an explicit provider" do
    kitty = Chef::Resource::Cat.new("loulou")    
    kitty.stub!(:provider).and_return(Chef::Provider::File)
    node = Chef::Node.new
    node.name("Intel")
    node.automatic_attrs[:platform] = "mac_os_x"
    node.automatic_attrs[:platform_version] = "9.2.2"
    Chef::Platform.find_provider_for_node(node, kitty).should eql(Chef::Provider::File)
  end

  it "should look up a provider based on the resource name if nothing else matches" do
    kitty = Chef::Resource::Cat.new("loulou")
    class Chef::Provider::Cat < Chef::Provider; end
    Chef::Platform.platforms[:default].delete(:cat)
    node = Chef::Node.new
    node.name("Intel")
    node.automatic_attrs[:platform] = "mac_os_x"
    node.automatic_attrs[:platform_version] = "8.5"
    Chef::Platform.find_provider_for_node(node, kitty).should eql(Chef::Provider::Cat)
  end
 
  def setup_file_resource
    node = Chef::Node.new
    node.automatic_attrs[:platform] = "mac_os_x"
    node.automatic_attrs[:platform_version] = "9.2.2"
    run_context = Chef::RunContext.new(node, {}, @events)
    [ Chef::Resource::File.new("whateva", run_context), run_context ]
  end

  it "returns a provider object given a Chef::Resource object which has a valid run context and an action" do
    file, run_context = setup_file_resource
    provider = Chef::Platform.provider_for_resource(file, :foo)
    provider.should be_an_instance_of(Chef::Provider::File)
    provider.new_resource.should equal(file)
    provider.run_context.should equal(run_context)
  end
  
  it "returns a provider object given a Chef::Resource object which has a valid run context without an action" do
    file, run_context = setup_file_resource
    provider = Chef::Platform.provider_for_resource(file)
    provider.should be_an_instance_of(Chef::Provider::File)
    provider.new_resource.should equal(file)
    provider.run_context.should equal(run_context)
  end
  
  it "raises an error when trying to find the provider for a resource with no run context" do
    file = Chef::Resource::File.new("whateva")
    lambda {Chef::Platform.provider_for_resource(file)}.should raise_error(ArgumentError)
  end

  it "does not support finding a provider by resource and node -- a run context is required" do
    lambda {Chef::Platform.provider_for_node('node', 'resource')}.should raise_error(NotImplementedError)
  end

  it "should update the provider map with map" do  
    Chef::Platform.set(
         :platform => :darwin,
         :version => "9.2.2",
         :resource => :file, 
         :provider => "masterful"
    )
    Chef::Platform.platforms[:darwin]["9.2.2"][:file].should eql("masterful")
    Chef::Platform.set(
         :platform => :darwin,
         :resource => :file,
         :provider => "masterful" 
    )
    Chef::Platform.platforms[:darwin][:default][:file].should eql("masterful")
    Chef::Platform.set(
         :resource => :file, 
         :provider => "masterful"
    )   
    Chef::Platform.platforms[:default][:file].should eql("masterful")
    
    Chef::Platform.set(
         :platform => :hero,
         :version => "9.2.2",
         :resource => :file, 
         :provider => "masterful"
    )
    Chef::Platform.platforms[:hero]["9.2.2"][:file].should eql("masterful")
    
    Chef::Platform.set(
         :resource => :file, 
         :provider => "masterful"
    )
    Chef::Platform.platforms[:default][:file].should eql("masterful")
    
    Chef::Platform.platforms = {}
    
    Chef::Platform.set(
         :resource => :file, 
         :provider => "masterful"
    )
    Chef::Platform.platforms[:default][:file].should eql("masterful")

    Chef::Platform.platforms = { :neurosis => {} }
    Chef::Platform.set(:platform => :neurosis, :resource => :package, :provider => "masterful")
    Chef::Platform.platforms[:neurosis][:default][:package].should eql("masterful")
    
  end
  
  
end
