require 'fileutils'

module Pod
  class Command
    class Repo < Command
      self.abstract_command = true

      # @todo should not show a usage banner!
      #
      self.summary = 'Manage spec-repositories'

      class Add < Repo
        self.summary = 'Add a spec repo.'

        self.description = <<-DESC
          Clones `URL` in the local spec-repos directory at `~/.cocoapods/repos/`. The
          remote can later be referred to by `NAME`.
        DESC

        self.arguments = 'NAME URL [BRANCH]'

        def self.options
          [
            ["--shallow", "Create a shallow clone (fast clone, but no push capabilities)"],
          ].concat(super)
        end

        def initialize(argv)
          @shallow = argv.flag?('shallow', false)
          @name, @url, @branch = argv.shift_argument, argv.shift_argument, argv.shift_argument
          super
        end

        def validate!
          super
          unless @name && @url
            help! "Adding a repo needs a `NAME` and a `URL`."
          end
        end

        def run
          prefix = @shallow ? 'Creating shallow clone of' : 'Cloning'
          UI.section("#{prefix} spec repo `#{@name}` from `#{@url}`#{" (branch `#{@branch}`)" if @branch}") do
            config.repos_dir.mkpath
            Dir.chdir(config.repos_dir) do
              command = "clone '#{@url}' #{@name}"
              command << ' --depth=1' if @shallow
              git!(command)
            end
            Dir.chdir(dir) { git!("checkout #{@branch}") } if @branch
            SourcesManager.check_version_information(dir)
          end
        end
      end

      #-----------------------------------------------------------------------#

      class Update < Repo
        self.summary = 'Update a spec repo.'

        self.description = <<-DESC
          Updates the local clone of the spec-repo `NAME`. If `NAME` is omitted
          this will update all spec-repos in `~/.cocoapods/repos`.
        DESC

        self.arguments = '[NAME]'

        def initialize(argv)
          @name = argv.shift_argument
          super
        end

        def run
          SourcesManager.update(@name, true)
        end
      end

      #-----------------------------------------------------------------------#

      class Lint < Repo
        self.summary = 'Validates all specs in a repo.'

        self.description = <<-DESC
          Lints the spec-repo `NAME`. If a directory is provided it is assumed
          to be the root of a repo. Finally, if `NAME` is not provided this
          will lint all the spec-repos known to CocoaPods.
        DESC

        self.arguments = '[ NAME | DIRECTORY ]'

        def self.options
          [["--only-errors", "Lint presents only the errors"]].concat(super)
        end

        def initialize(argv)
          @name = argv.shift_argument
          @only_errors = argv.flag?('only-errors')
          super
        end

        # @todo Part of this logic needs to be ported to cocoapods-core so web
        #       services can validate the repo.
        #
        # @todo add UI.print and enable print statements again.
        #
        def run
          if @name
            dirs = File.exists?(@name) ? [ Pathname.new(@name) ] : [ dir ]
          else
            dirs = config.repos_dir.children.select {|c| c.directory?}
          end
          dirs.each do |dir|
            SourcesManager.check_version_information(dir)
            UI.puts "\nLinting spec repo `#{dir.realpath.basename}`\n".yellow

            validator = Source::HealthReporter.new(dir)
            validator.pre_check do |name, version|
              UI.print '.'
            end
            report = validator.analyze
            UI.puts
            UI.puts

            report.pods_by_warning.each do |message, versions_by_name|
              UI.puts "-> #{message}".yellow
              versions_by_name.each { |name, versions| UI.puts "  - #{name} (#{versions * ', '})" }
              UI.puts
            end

            report.pods_by_error.each do |message, versions_by_name|
              UI.puts "-> #{message}".red
              versions_by_name.each { |name, versions| UI.puts "  - #{name} (#{versions * ', '})" }
              UI.puts
            end

            UI.puts "Analyzed #{report.analyzed_paths.count} podspecs files.\n\n"
            if report.pods_by_error.count.zero?
              UI.puts "All the specs passed validation.".green << "\n\n"
            else
              raise Informative, "#{report.pods_by_error.count} podspecs failed validation."
            end
          end
        end
      end

      #-----------------------------------------------------------------------#

      class Remove < Repo
        self.summary = 'Remove a spec repo'

        self.description = <<-DESC
          Deletes the remote named `NAME` from the local spec-repos directory at `~/.cocoapods/repos/.`
        DESC

        self.arguments = 'NAME'

        def initialize(argv)
          @name = argv.shift_argument
          super
        end

        def validate!
          super
          help! 'Deleting a repo needs a `NAME`.' unless @name
          help! "repo #{@name} does not exist" unless File.directory?(dir)
          help! "You do not have permission to delete the #{@name} repository." \
                "Perhaps try prefixing this command with sudo." unless File.writable?(dir)
        end

        def run
          UI.section("Removing spec repo `#{@name}`") do
            FileUtils.rm_rf(dir)
          end
        end
      end

      extend Executable
      executable :git

      def dir
        config.repos_dir + @name
      end
    end
  end
end

