module Danger
  class Local < Runner
    self.summary = 'Run the Dangerfile locally.'
    self.command = 'local'

    def initialize(argv)
      @dangerfile_path = 'Dangerfile' if File.exist? 'Dangerfile'
      @pr_num = argv.option('use-merged-pr')
      super
    end

    def self.options
      [
        ['--use-merged-pr=[#id]', 'The ID of an already merged PR inside your history to use as a reference for the local run.']
      ].concat(super)
    end

    def validate!
      super
      unless @dangerfile_path
        help! 'Could not find a Dangerfile.'
      end
    end

    def run
      ENV['DANGER_USE_LOCAL_GIT'] = 'YES'
      ENV['LOCAL_GIT_PR_ID'] = @pr_num if @pr_num

      env = EnvironmentManager.new(ENV)
      dm = Dangerfile.new(env, cork)
      dm.init_plugins

      source = dm.env.ci_source
      if source.nil? or source.repo_slug.empty?
        cork.puts 'danger local failed because it only works with GitHub projects at the moment. Sorry.'.red
        exit 0
      end

      gh = dm.env.request_source

      cork.puts "Running your Dangerfile against this PR - https://#{gh.host}/#{source.repo_slug}/pull/#{source.pull_request_id}"

      if verbose != true
        cork.puts 'Turning on --verbose'
        dm.verbose = true
      end

      cork.puts

      # We can use tokenless here, as it's running on someone's computer
      # and is IP locked, as opposed  to on the CI.
      gh.support_tokenless_auth = true

      begin
        gh.fetch_details
      rescue Octokit::NotFound
        cork.puts "Local repository was not found on GitHub. If you're trying to test a private repository please provide a valid API token through " + 'DANGER_GITHUB_API_TOKEN'.yellow + ' environment variable.'
        return
      end

      dm.env.request_source = gh

      begin
        dm.env.fill_environment_vars
        dm.env.ensure_danger_branches_are_setup
        dm.env.scm.diff_for_folder('.', from: Danger::EnvironmentManager.danger_base_branch, to: Danger::EnvironmentManager.danger_head_branch)
        dm.parse(Pathname.new(@dangerfile_path))
        dm.print_results
      ensure
        dm.env.clean_up
      end
    end
  end
end