# encoding: utf-8
# Copyright 2015 Dominik Richter
# author: Dominik Richter
# author: Christoph Hartmann

require 'logger'
require 'thor'
require 'json'
require 'pp'
require 'utils/json_log'
require 'utils/latest_version'
require 'inspec/base_cli'
require 'inspec/plugin/v1'
require 'inspec/plugin/v2'
require 'inspec/runner_mock'
require 'inspec/env_printer'
require 'inspec/schema'

class Inspec::InspecCLI < Inspec::BaseCLI
  class_option :log_level, aliases: :l, type: :string,
               desc: 'Set the log level: info (default), debug, warn, error'

  class_option :log_location, type: :string,
               desc: 'Location to send diagnostic log messages to. (default: STDOUT or Inspec::Log.error)'

  class_option :diagnose, type: :boolean,
    desc: 'Show diagnostics (versions, configurations)'

  class_option :color, type: :boolean,
    desc: 'Use colors in output.'

  class_option :interactive, type: :boolean,
    desc: 'Allow or disable user interaction'

  desc 'json PATH', 'read all tests in PATH and generate a JSON summary'
  option :output, aliases: :o, type: :string,
    desc: 'Save the created profile to a path'
  option :controls, type: :array,
    desc: 'A list of controls to include. Ignore all other tests.'
  profile_options
  def json(target)
    o = opts.dup
    diagnose(o)
    o['log_location'] = STDERR
    configure_logger(o)

    o[:backend] = Inspec::Backend.create(target: 'mock://')
    o[:check_mode] = true
    o[:vendor_cache] = Inspec::Cache.new(o[:vendor_cache])

    profile = Inspec::Profile.for_target(target, o)
    info = profile.info
    # add in inspec version
    info[:generator] = {
      name: 'inspec',
      version: Inspec::VERSION,
    }
    dst = o[:output].to_s
    if dst.empty?
      puts JSON.dump(info)
    else
      if File.exist? dst
        puts "----> updating #{dst}"
      else
        puts "----> creating #{dst}"
      end
      fdst = File.expand_path(dst)
      File.write(fdst, JSON.dump(info))
    end
  rescue StandardError => e
    pretty_handle_exception(e)
  end

  desc 'check PATH', 'verify all tests at the specified PATH'
  option :format, type: :string
  profile_options
  def check(path) # rubocop:disable Metrics/AbcSize
    o = opts.dup
    diagnose(o)
    o[:backend] = Inspec::Backend.create(target: 'mock://')
    o[:check_mode] = true
    o[:vendor_cache] = Inspec::Cache.new(o[:vendor_cache])

    # run check
    profile = Inspec::Profile.for_target(path, o)
    result = profile.check

    if o['format'] == 'json'
      puts JSON.generate(result)
    else
      %w{location profile controls timestamp valid}.each do |item|
        puts format('%-12s %s', item.to_s.capitalize + ':',
                    mark_text(result[:summary][item.to_sym]))
      end
      puts

      if result[:errors].empty? and result[:warnings].empty?
        puts 'No errors or warnings'
      else
        red    = "\033[31m"
        yellow = "\033[33m"
        rst    = "\033[0m"

        item_msg = lambda { |item|
          pos = [item[:file], item[:line], item[:column]].compact.join(':')
          pos.empty? ? item[:msg] : pos + ': ' + item[:msg]
        }
        result[:errors].each do |item|
          puts "#{red}  ✖  #{item_msg.call(item)}#{rst}"
        end
        result[:warnings].each do |item|
          puts "#{yellow}  !  #{item_msg.call(item)}#{rst}"
        end

        puts
        puts format('Summary:     %s%d errors%s, %s%d warnings%s',
                    red, result[:errors].length, rst,
                    yellow, result[:warnings].length, rst)
      end
    end
    exit 1 unless result[:summary][:valid]
  rescue StandardError => e
    pretty_handle_exception(e)
  end

  desc 'vendor PATH', 'Download all dependencies and generate a lockfile in a `vendor` directory'
  option :overwrite, type: :boolean, default: false,
    desc: 'Overwrite existing vendored dependencies and lockfile.'
  def vendor(path = nil)
    o = opts.dup
    configure_logger(o)
    o[:logger] = Logger.new(STDOUT)
    o[:logger].level = get_log_level(o.log_level)

    vendor_deps(path, o)
  end

  desc 'archive PATH', 'archive a profile to tar.gz (default) or zip'
  profile_options
  option :output, aliases: :o, type: :string,
    desc: 'Save the archive to a path'
  option :zip, type: :boolean, default: false,
    desc: 'Generates a zip archive.'
  option :tar, type: :boolean, default: false,
    desc: 'Generates a tar.gz archive.'
  option :overwrite, type: :boolean, default: false,
    desc: 'Overwrite existing archive.'
  option :ignore_errors, type: :boolean, default: false,
    desc: 'Ignore profile warnings.'
  def archive(path)
    o = opts.dup
    diagnose(o)

    o[:logger] = Logger.new(STDOUT)
    o[:logger].level = get_log_level(o.log_level)
    o[:backend] = Inspec::Backend.create(target: 'mock://')

    # Force vendoring with overwrite when archiving
    vendor_options = o.dup
    vendor_options[:overwrite] = true
    vendor_deps(path, vendor_options)

    profile = Inspec::Profile.for_target(path, o)
    result = profile.check

    if result && !o[:ignore_errors] == false
      o[:logger].info 'Profile check failed. Please fix the profile before generating an archive.'
      return exit 1
    end

    # generate archive
    exit 1 unless profile.archive(o)
  rescue StandardError => e
    pretty_handle_exception(e)
  end

  desc 'exec LOCATIONS', 'run all test files at the specified LOCATIONS.'
  # TODO: find a way for Thor not to butcher the formatting of this
  long_desc <<~EOT
    Loads the given profile(s) and fetches their dependencies if needed. Then
    connects to the target and executes any controls contained in the profiles.
    One or more reporters are used to generate output.

    ```
    Exit codes:
        0  Normal exit, all tests passed
        1  Usage or general error
        2  Error in plugin system
        3  Fatal deprecation encountered
      100  Normal exit, at least one test failed
      101  Normal exit, at least one test skipped but none failed
    ```

    Below are some examples of using `exec` with different test LOCATIONS:

    Automate:
      ```
      inspec compliance login
      inspec exec compliance://username/linux-baseline
      ```

    Supermarket:
      ```
      inspec exec supermarket://username/linux-baseline
      ```

    Local profile (executes all tests in `controls/`):
      ```
      inspec exec /path/to/profile
      ```

    Local single test (doesn't allow attributes or custom resources)
      ```
      inspec exec /path/to/a_test.rb
      ```

    Git via SSH
      ```
      inspec exec git@github.com:dev-sec/linux-baseline.git
      ```

    Git via HTTPS (.git suffix is required):
      ```
      inspec exec https://github.com/dev-sec/linux-baseline.git
      ```

    Private Git via HTTPS (.git suffix is required):
      ```
      inspec exec https://API_TOKEN@github.com/dev-sec/linux-baseline.git
      ```

    Private Git via HTTPS and cached credentials (.git suffix is required):
      ```
      git config credential.helper cache
      git ls-remote https://github.com/dev-sec/linux-baseline.git
      inspec exec https://github.com/dev-sec/linux-baseline.git
      ```

    Web hosted fileshare (also supports .zip):
      ```
      inspec exec https://webserver/linux-baseline.tar.gz
      ```

    Web hosted fileshare with basic authentication (supports .zip):
      ```
      inspec exec https://username:password@webserver/linux-baseline.tar.gz
      ```
  EOT
  exec_options
  def exec(*targets)
    o = opts(:exec).dup
    diagnose(o)
    configure_logger(o)

    runner = Inspec::Runner.new(o)
    targets.each { |target| runner.add_target(target) }

    exit runner.run
  rescue ArgumentError, RuntimeError, Train::UserError => e
    $stderr.puts e.message
    exit 1
  rescue StandardError => e
    pretty_handle_exception(e)
  end

  desc 'detect', 'detect the target OS'
  target_options
  option :format, type: :string
  def detect
    o = opts(:detect).dup
    o[:command] = 'platform.params'
    (_, res) = run_command(o)
    if o['format'] == 'json'
      puts res.to_json
    else
      headline('Platform Details')
      puts Inspec::BaseCLI.detect(params: res, indent: 0, color: 36)
    end
  rescue ArgumentError, RuntimeError, Train::UserError => e
    $stderr.puts e.message
    exit 1
  rescue StandardError => e
    pretty_handle_exception(e)
  end

  desc 'shell', 'open an interactive debugging shell'
  target_options
  option :command, aliases: :c,
    desc: 'A single command string to run instead of launching the shell'
  option :reporter, type: :array,
    banner: 'one two:/output/file/path',
    desc: 'Enable one or more output reporters: cli, documentation, html, progress, json, json-min, json-rspec, junit'
  option :depends, type: :array, default: [],
    desc: 'A space-delimited list of local folders containing profiles whose libraries and resources will be loaded into the new shell'
  option :distinct_exit, type: :boolean, default: true,
    desc: 'Exit with code 100 if any tests fail, and 101 if any are skipped but none failed (default).  If disabled, exit 0 on skips and 1 for failures.'
  def shell_func
    o = opts(:shell).dup
    diagnose(o)
    o[:debug_shell] = true

    log_device = suppress_log_output?(o) ? nil : STDOUT
    o[:logger] = Logger.new(log_device)
    o[:logger].level = get_log_level(o.log_level)

    if o[:command].nil?
      runner = Inspec::Runner.new(o)
      return Inspec::Shell.new(runner).start
    end

    run_type, res = run_command(o)
    exit res unless run_type == :ruby_eval

    # No InSpec tests - just print evaluation output.
    res = (res.respond_to?(:to_json) ? res.to_json : JSON.dump(res)) if o['reporter']&.keys&.include?('json')
    puts res
    exit 0
  rescue RuntimeError, Train::UserError => e
    $stderr.puts e.message
  rescue StandardError => e
    pretty_handle_exception(e)
  end

  desc 'env', 'Output shell-appropriate completion configuration'
  def env(shell = nil)
    p = Inspec::EnvPrinter.new(self.class, shell)
    p.print_and_exit!
  rescue StandardError => e
    pretty_handle_exception(e)
  end

  desc 'schema NAME', 'print the JSON schema', hide: true
  def schema(name)
    puts Inspec::Schema.json(name)
  rescue StandardError => e
    puts e
    puts "Valid schemas are #{Inspec::Schema.names.join(', ')}"
  end

  desc 'version', 'prints the version of this tool'
  option :format, type: :string
  def version
    if opts['format'] == 'json'
      v = { version: Inspec::VERSION }
      puts v.to_json
    else
      puts Inspec::VERSION
      # display outdated version
      latest = LatestInSpecVersion.new.latest
      if Gem::Version.new(Inspec::VERSION) < Gem::Version.new(latest)
        puts "\nYour version of InSpec is out of date! The latest version is #{latest}."
      end
    end
  end
  map %w{-v --version} => :version

  private

  def run_command(opts)
    runner = Inspec::Runner.new(opts)
    res = runner.eval_with_virtual_profile(opts[:command])
    runner.load

    return :ruby_eval, res if runner.all_rules.empty?
    return :rspec_run, runner.run_tests # rubocop:disable Style/RedundantReturn
  end
end

begin
  # Handle help commands
  # This allows you to use any of the normal help commands after the normal args.
  help_commands = ['-h', '--help', 'help']
  (help_commands & ARGV).each do |cmd|
    # move the help argument to one place behind the end for Thor to digest
    if ARGV.size > 1
      match = ARGV.delete(cmd)
      ARGV.insert(-2, match)
    end
  end

  # Load v2 plugins
  v2_loader = Inspec::Plugin::V2::Loader.new
  v2_loader.load_all
  v2_loader.exit_on_load_error
  v2_loader.activate_mentioned_cli_plugins

  # Load v1 plugins on startup
  ctl = Inspec::PluginCtl.new
  ctl.list.each { |x| ctl.load(x) }

  # load v1 CLI plugins before the InSpec CLI has been started
  Inspec::Plugins::CLI.subcommands.each { |_subcommand, params|
    Inspec::InspecCLI.register(
      params[:klass],
      params[:subcommand_name],
      params[:usage],
      params[:description],
      params[:options],
    )
  }
rescue Inspec::Plugin::V2::Exception => v2ex
  Inspec::Log.error v2ex.message

  if ARGV.include?('--debug')
    Inspec::Log.error v2ex.class.name
    Inspec::Log.error v2ex.backtrace.join("\n")
  else
    Inspec::Log.error 'Run again with --debug for a stacktrace.'
  end
  exit 2
end