#
# Author:: Igor Afonov <afonov@gmail.com>
# Copyright:: Copyright 2011-2016, Igor Afonov
# Copyright:: Copyright (c) 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::Provider::Service::Macosx do
  describe ".gather_plist_dirs" do
    context "when HOME directory is set" do
      before do
        allow(Chef::Util::PathHelper).to receive(:home).with("Library", "LaunchAgents").and_yield("/Users/someuser/Library/LaunchAgents")
      end

      it "includes users's LaunchAgents folder" do
        expect(described_class.gather_plist_dirs).to include("/Users/someuser/Library/LaunchAgents")
      end
    end

    context "when HOME directory is not set" do
      before do
        allow(Chef::Util::PathHelper).to receive(:home).with("Library", "LaunchAgents").and_return(nil)
      end

      it "doesn't include user's LaunchAgents folder" do
        expect(described_class.gather_plist_dirs).not_to include("~/Library/LaunchAgents")
      end
    end
  end

  context "when service name is given as" do
    let(:node) { Chef::Node.new }
    let(:events) { Chef::EventDispatch::Dispatcher.new }
    let(:logger) { double("Mixlib::Log::Child").as_null_object }
    let(:run_context) { Chef::RunContext.new(node, {}, events) }
    let(:provider) { described_class.new(new_resource, run_context) }
    let(:launchctl_stdout) { StringIO.new }
    let(:plutil_stdout) { String.new <<~XML }
      <?xml version="1.0" encoding="UTF-8"?>
      <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
      <plist version="1.0">
      <dict>
        <key>Label</key>
        <string>io.redis.redis-server</string>
      </dict>
      </plist>
    XML

    %w{Daemon Agent}.each do |service_type|
      ["redis-server", "io.redis.redis-server"].each do |service_name|
        let(:plist) { "/Library/LaunchDaemons/io.redis.redis-server.plist" }
        let(:session) { StringIO.new }
        if service_type == "Agent"
          let(:plist) { "/Library/LaunchAgents/io.redis.redis-server.plist" }
          let(:session) { "-S Aqua " }
          let(:su_cmd) { "su -l igor -c" }
        end
        let(:service_label) { "io.redis.redis-server" }
        before do
          allow(run_context).to receive(:logger).and_return(logger)
          allow(Dir).to receive(:glob).and_return([plist], [])
          @stat = double("File::Stat", { uid: 501 })
          allow(File).to receive(:stat).and_return(@stat)
          @getpwuid = double("Etc::Passwd", { name: "mikedodge04" })
          allow(Etc).to receive(:getpwuid).and_return(@getpwuid)
          allow(node).to receive(:[]).with("platform_version").and_return("10.11.1")
          cmd = "launchctl list #{service_label}"
          allow(provider).to receive(:shell_out)
            .with(/(#{su_cmd} '#{cmd}'|#{cmd})/, default_env: false)
            .and_return(double("Status",
              stdout: launchctl_stdout, exitstatus: 0))
          allow(File).to receive(:exists?).and_return([true], [])
          allow(provider).to receive(:shell_out!)
            .with(/plutil -convert xml1 -o/, default_env: false)
            .and_return(double("Status", stdout: plutil_stdout))
        end

        context "#{service_name} that is a #{service_type}" do
          let(:new_resource) { Chef::Resource::MacosxService.new(service_name) }
          let!(:current_resource) { Chef::Resource::MacosxService.new(service_name) }

          describe "#load_current_resource" do

            # CHEF-5223 "you can't glob for a file that hasn't been converged
            # onto the node yet."
            context "when the plist doesn't exist" do

              def run_resource_setup_for_action(action)
                new_resource.action(action)
                provider.action = action
                provider.load_current_resource
                provider.define_resource_requirements
                provider.process_resource_requirements
              end

              before do
                allow(Dir).to receive(:glob).and_return([])
                allow(File).to receive(:exists?).and_return([true], [])
                allow(provider).to receive(:shell_out!)
                  .with(/plutil -convert xml1 -o/)
                  .and_raise(Mixlib::ShellOut::ShellCommandFailed)
              end

              it "works for action :nothing" do
                expect { run_resource_setup_for_action(:nothing) }.not_to raise_error
              end

              it "works for action :start" do
                expect { run_resource_setup_for_action(:start) }.not_to raise_error
              end

              it "errors if action is :enable" do
                expect { run_resource_setup_for_action(:enable) }.to raise_error(Chef::Exceptions::Service)
              end

              it "errors if action is :disable" do
                expect { run_resource_setup_for_action(:disable) }.to raise_error(Chef::Exceptions::Service)
              end
            end

            context "when launchctl returns pid in service list" do
              let(:launchctl_stdout) { StringIO.new <<~SVC_LIST }
                {
                  "LimitLoadToSessionType" = "System";
                  "Label" = "io.redis.redis-server";
                  "TimeOut" = 30;
                  "OnDemand" = false;
                  "LastExitStatus" = 0;
                  "PID" = 62803;
                  "Program" = "do_some.sh";
                  "ProgramArguments" = (
                    "path/to/do_something.sh";
                    "-f";
                  );
                };
              SVC_LIST

              before do
                provider.load_current_resource
              end

              it "sets resource running state to true" do
                expect(provider.current_resource.running).to be_truthy
              end

              it "sets resouce enabled state to true" do
                expect(provider.current_resource.enabled).to be_truthy
              end
            end

            describe "running unsupported actions" do
              before do
                allow(Dir).to receive(:glob).and_return([(plist).to_s], [])
                allow(File).to receive(:exists?).and_return([true], [])
              end
              it "should throw an exception when reload action is attempted" do
                expect { provider.run_action(:reload) }.to raise_error(Chef::Exceptions::UnsupportedAction)
              end
            end
            context "when launchctl returns empty service pid" do
              let(:launchctl_stdout) { StringIO.new <<~SVC_LIST }
                {
                  "LimitLoadToSessionType" = "System";
                  "Label" = "io.redis.redis-server";
                  "TimeOut" = 30;
                  "OnDemand" = false;
                  "LastExitStatus" = 0;
                  "Program" = "do_some.sh";
                  "ProgramArguments" = (
                    "path/to/do_something.sh";
                    "-f";
                  );
                };
              SVC_LIST

              before do
                provider.load_current_resource
              end

              it "sets resource running state to false" do
                expect(provider.current_resource.running).to be_falsey
              end

              it "sets resouce enabled state to true" do
                expect(provider.current_resource.enabled).to be_truthy
              end
            end

            context "when launchctl doesn't return service entry at all" do
              let(:launchctl_stdout) { StringIO.new <<~SVC_LIST }
                Could not find service "io.redis.redis-server" in domain for system
              SVC_LIST

              it "sets service running state to false" do
                provider.load_current_resource
                expect(provider.current_resource.running).to be_falsey
              end

              context "and plist for service is not available" do
                before do
                  allow(Dir).to receive(:glob).and_return([])
                  provider.load_current_resource
                end

                it "sets resouce enabled state to false" do
                  expect(provider.current_resource.enabled).to be_falsey
                end
              end

              context "and plist for service is available" do
                before do
                  allow(Dir).to receive(:glob).and_return([(plist).to_s], [])
                  provider.load_current_resource
                end

                it "sets resouce enabled state to true" do
                  expect(provider.current_resource.enabled).to be_truthy
                end
              end

              describe "and several plists match service name" do
                it "throws exception" do
                  allow(Dir).to receive(:glob).and_return([(plist).to_s,
                                              "/Users/wtf/something.plist"])
                  provider.load_current_resource
                  provider.define_resource_requirements
                  expect { provider.process_resource_requirements }.to raise_error(Chef::Exceptions::Service)
                end
              end
            end
          end
          describe "#start_service" do
            before do
              allow(Chef::Resource::MacosxService).to receive(:new).and_return(current_resource)
              provider.load_current_resource
              allow(current_resource).to receive(:running).and_return(false)
            end

            it "calls the start command if one is specified and service is not running" do
              allow(new_resource).to receive(:start_command).and_return("cowsay dirty")

              expect(provider).to receive(:shell_out!).with("cowsay dirty", default_env: false)
              provider.start_service
            end

            it "shows warning message if service is already running" do
              allow(current_resource).to receive(:running).and_return(true)
              expect(logger).to receive(:trace).with("macosx_service[#{service_name}] already running, not starting")

              provider.start_service
            end

            it "starts service via launchctl if service found" do
              cmd = "launchctl load -w " + session + plist
              expect(provider).to receive(:shell_out)
                .with(/(#{su_cmd} .#{cmd}.|#{cmd})/, default_env: false)
                .and_return(0)

              provider.start_service
            end
          end

          describe "#stop_service" do
            before do
              allow(Chef::Resource::MacosxService).to receive(:new).and_return(current_resource)

              provider.load_current_resource
              allow(current_resource).to receive(:running).and_return(true)
            end

            it "calls the stop command if one is specified and service is running" do
              allow(new_resource).to receive(:stop_command).and_return("kill -9 123")

              expect(provider).to receive(:shell_out!).with("kill -9 123", default_env: false)
              provider.stop_service
            end

            it "shows warning message if service is not running" do
              allow(current_resource).to receive(:running).and_return(false)
              expect(logger).to receive(:trace).with("macosx_service[#{service_name}] not running, not stopping")

              provider.stop_service
            end

            it "stops the service via launchctl if service found" do
              cmd = "launchctl unload -w " + plist
              expect(provider).to receive(:shell_out)
                .with(/(#{su_cmd} .#{cmd}.|#{cmd})/, default_env: false)
                .and_return(0)

              provider.stop_service
            end
          end

          describe "#restart_service" do
            before do
              allow(Chef::Resource::Service).to receive(:new).and_return(current_resource)

              provider.load_current_resource
              allow(current_resource).to receive(:running).and_return(true)
              allow(provider).to receive(:sleep)
            end

            it "issues a command if given" do
              allow(new_resource).to receive(:restart_command).and_return("reload that thing")

              expect(provider).to receive(:shell_out!).with("reload that thing", default_env: false)
              provider.restart_service
            end

            it "stops and then starts service" do
              expect(provider).to receive(:unload_service)
              expect(provider).to receive(:load_service)

              provider.restart_service
            end
          end
        end
      end
    end
  end
end