#
# Copyright:: Copyright 2015-2016, Chef Software, 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::Knife::SubcommandLoader::GemGlobLoader do
  let(:loader) { Chef::Knife::SubcommandLoader::GemGlobLoader.new(File.join(CHEF_SPEC_DATA, "knife-site-subcommands")) }
  let(:home) { File.join(CHEF_SPEC_DATA, "knife-home") }
  let(:plugin_dir) { File.join(home, ".chef", "plugins", "knife") }

  before do
    allow(ChefUtils).to receive(:windows?) { false }
    Chef::Util::PathHelper.class_variable_set(:@@home_dir, home)
  end

  after do
    Chef::Util::PathHelper.class_variable_set(:@@home_dir, nil)
  end

  it "builds a list of the core subcommand file require paths" do
    expect(loader.subcommand_files).not_to be_empty
    loader.subcommand_files.each do |require_path|
      expect(require_path).to match(%r{chef/knife/.*|plugins/knife/.*})
    end
  end

  it "finds files installed via rubygems" do
    expect(loader.find_subcommands_via_rubygems).to include("chef/knife/node_create")
    loader.find_subcommands_via_rubygems.each_value { |abs_path| expect(abs_path).to match(%r{chef/knife/.+}) }
  end

  it "finds files from latest version of installed gems" do
    gems = [ double("knife-ec2-0.5.12") ]
    gem_files = [
      "/usr/lib/ruby/gems/knife-ec2-0.5.12/lib/chef/knife/ec2_base.rb",
      "/usr/lib/ruby/gems/knife-ec2-0.5.12/lib/chef/knife/ec2_otherstuff.rb",
    ]
    expect($LOAD_PATH).to receive(:map).and_return([])
    if Gem::Specification.respond_to? :latest_specs
      expect(Gem::Specification).to receive(:latest_specs).with(true).and_return(gems)
      expect(gems[0]).to receive(:matches_for_glob).with(%r{chef/knife/\*\.rb\{(.*),\.rb,(.*)\}}).and_return(gem_files)
    else
      expect(Gem.source_index).to receive(:latest_specs).with(true).and_return(gems)
      expect(gems[0]).to receive(:require_paths).twice.and_return(["lib"])
      expect(gems[0]).to receive(:full_gem_path).and_return("/usr/lib/ruby/gems/knife-ec2-0.5.12")
      expect(Dir).to receive(:[]).with("/usr/lib/ruby/gems/knife-ec2-0.5.12/lib/chef/knife/*.rb").and_return(gem_files)
    end
    expect(loader).to receive(:find_subcommands_via_dirglob).and_return({})
    expect(loader.subcommand_files.select { |file| file =~ /knife-ec2/ }.sort).to eq(gem_files)
  end

  it "finds files using a dirglob when rubygems is not available" do
    expect(loader.find_subcommands_via_dirglob).to include("chef/knife/node_create")
    loader.find_subcommands_via_dirglob.each_value { |abs_path| expect(abs_path).to match(%r{chef/knife/.+}) }
  end

  it "finds user-specific subcommands in the user's ~/.chef directory" do
    expected_command = File.join(home, ".chef", "plugins", "knife", "example_home_subcommand.rb")
    expect(loader.site_subcommands).to include(expected_command)
  end

  it "finds repo specific subcommands by searching for a .chef directory" do
    expected_command = File.join(CHEF_SPEC_DATA, "knife-site-subcommands", "plugins", "knife", "example_subcommand.rb")
    expect(loader.site_subcommands).to include(expected_command)
  end

  # https://github.com/chef/chef-dk/issues/227
  #
  # `knife` in ChefDK isn't from a gem install, it's directly run from a clone
  # of the source, but there can be one or more versions of chef also installed
  # as a gem. If the gem install contains a command that doesn't exist in the
  # source tree of the "primary" chef install, it can be loaded and cause an
  # error. We also want to ensure that we only load builtin commands from the
  # "primary" chef install.
  context "when a different version of chef is also installed as a gem" do

    let(:all_found_commands) do
      [
        "/opt/chefdk/embedded/apps/chef/lib/chef/knife/bootstrap.rb",
        "/opt/chefdk/embedded/apps/chef/lib/chef/knife/client_bulk_delete.rb",
        "/opt/chefdk/embedded/apps/chef/lib/chef/knife/client_create.rb",

        # We use the fake version 1.0.0 because that version doesn't exist,
        # which ensures it won't ever equal "chef-#{Chef::VERSION}"
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-1.0.0/lib/chef/knife/bootstrap.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-1.0.0/lib/chef/knife/client_bulk_delete.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-1.0.0/lib/chef/knife/client_create.rb",

        # Test that we don't accept a version number that is different only in
        # trailing characters, e.g. we are running Chef 12.0.0 but there is a
        # Chef 12.0.0.rc.0 gem also:
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}.rc.0/lib/chef/knife/thing.rb",

        # Test that we ignore the platform suffix when checking for different
        # gem versions.
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}-x86-mingw32/lib/chef/knife/valid.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}-i386-mingw64/lib/chef/knife/valid-too.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}-mswin32/lib/chef/knife/also-valid.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}-universal-mingw32/lib/chef/knife/universal-is-valid.rb",
        # ...but don't ignore the .rc / .dev parts in the case when we have
        # platform suffixes
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}.rc.0-x86-mingw32/lib/chef/knife/invalid.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}.dev-mswin32/lib/chef/knife/invalid-too.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}.dev.0-x86-mingw64/lib/chef/knife/still-invalid.rb",

        # This command is "extra" compared to what's in the embedded/apps/chef install:
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-1.0.0/lib/chef/knife/data_bag_secret_options.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-vault-2.2.4/lib/chef/knife/decrypt.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/knife-spork-1.4.1/lib/chef/knife/spork-bump.rb",

        # These are fake commands that have names designed to test that the
        # regex is strict enough
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-foo-#{Chef::VERSION}/lib/chef/knife/chef-foo.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/foo-chef-#{Chef::VERSION}/lib/chef/knife/foo-chef.rb",

        # In a real scenario, we'd use rubygems APIs to only select the most
        # recent gem, but for this test we want to check that we're doing the
        # right thing both when the plugin version matches and does not match
        # the current chef version. Looking at
        # `SubcommandLoader::MATCHES_THIS_CHEF_GEM` and
        # `SubcommandLoader::MATCHES_CHEF_GEM` should make it clear why we want
        # to test these two cases.
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-bar-1.0.0/lib/chef/knife/chef-bar.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/bar-chef-1.0.0/lib/chef/knife/bar-chef.rb",
      ]
    end

    let(:expected_valid_commands) do
      [
        "/opt/chefdk/embedded/apps/chef/lib/chef/knife/bootstrap.rb",
        "/opt/chefdk/embedded/apps/chef/lib/chef/knife/client_bulk_delete.rb",
        "/opt/chefdk/embedded/apps/chef/lib/chef/knife/client_create.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}-x86-mingw32/lib/chef/knife/valid.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}-i386-mingw64/lib/chef/knife/valid-too.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}-mswin32/lib/chef/knife/also-valid.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-#{Chef::VERSION}-universal-mingw32/lib/chef/knife/universal-is-valid.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-vault-2.2.4/lib/chef/knife/decrypt.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/knife-spork-1.4.1/lib/chef/knife/spork-bump.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-foo-#{Chef::VERSION}/lib/chef/knife/chef-foo.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/foo-chef-#{Chef::VERSION}/lib/chef/knife/foo-chef.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/chef-bar-1.0.0/lib/chef/knife/chef-bar.rb",
        "/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/bar-chef-1.0.0/lib/chef/knife/bar-chef.rb",
      ]
    end

    before do
      expect(loader).to receive(:find_files_latest_gems).with("chef/knife/*.rb").and_return(all_found_commands)
      expect(loader).to receive(:find_subcommands_via_dirglob).and_return({})
    end

    it "ignores commands from the non-matching gem install" do
      expect(loader.find_subcommands_via_rubygems.values).to eq(expected_valid_commands)
    end

  end

  describe "finding 3rd party plugins" do
    let(:env_home) { "/home/alice" }
    let(:manifest_path) { env_home + "/.chef/plugin_manifest.json" }

    before do
      env_dup = ENV.to_hash
      allow(ENV).to receive(:[]) { |key| env_dup[key] }
      allow(ENV).to receive(:[]).with("HOME").and_return(env_home)
    end

    it "searches rubygems for plugins" do
      if Gem::Specification.respond_to?(:latest_specs)
        expect(Gem::Specification).to receive(:latest_specs).and_call_original
      else
        expect(Gem.source_index).to receive(:latest_specs).and_call_original
      end
      loader.subcommand_files.each do |require_path|
        expect(require_path).to match(%r{chef/knife/.*|plugins/knife/.*})
      end
    end

    context "and HOME environment variable is not set" do
      before do
        allow(ENV).to receive(:[]).with("HOME").and_return(nil)
      end

      it "searches rubygems for plugins" do
        if Gem::Specification.respond_to?(:latest_specs)
          expect(Gem::Specification).to receive(:latest_specs).and_call_original
        else
          expect(Gem.source_index).to receive(:latest_specs).and_call_original
        end
        loader.subcommand_files.each do |require_path|
          expect(require_path).to match(%r{chef/knife/.*|plugins/knife/.*})
        end
      end
    end
  end
end
