#
# A class to generate a markdown file with all the information available with the
# help subcommand.
#
# This is adapted from GLI::Commands::RdocDocumentListener
#

require 'stringio'
require 'gli/commands/help_modules/arg_name_formatter'

module LeapCli
  class MarkdownDocumentListener

    def initialize(global_options,options,arguments,app)
      @io = File.new(File.basename($0) + ".md",'w')
      @nest = ''
      @commands = [File.basename($0)]
      @arg_name_formatter = GLI::Commands::HelpModules::ArgNameFormatter.new
    end

    def beginning
    end

    # Called when processing has completed
    def ending
      @io.close
    end

    # Gives you the program description
    def program_desc(desc)
      @io.puts "@title = 'Command Line Reference'"
      #@io.puts "# #{File.basename($0)} - #{desc}"
      @io.puts
    end

    def program_long_desc(desc)
      @io.puts desc
      @io.puts
    end

    # Gives you the program version
    def version(version)
      #@io.puts "v#{version}"
      #@io.puts
    end

    def options
      #@io.puts "<div class='options'>"
      @io.puts
      if @nest.size == 0
        @io.puts "# Global Options"
      else
        #@io.puts "#{@nest}# Options"
        @io.puts "**Options**"
      end
      @io.puts
    end

    # Gives you a flag in the current context
    def flag(name,aliases,desc,long_desc,default_value,arg_name,must_match,type)
      invocations = ([name] + Array(aliases)).map { |_| add_dashes(_) }.join('|')
      usage = "#{invocations} #{arg_name || 'arg'}"
      #@io.puts "#{@nest}## #{usage}"
      @io.puts "* `#{usage}`  "
      @io.puts String(desc).strip + "  "
      @io.puts String(long_desc).strip + "  " if long_desc
      @io.puts "Default Value: #{default_value || 'None'}  "
      @io.puts "Must Match: #{must_match.to_s}  " unless must_match.nil?
      @io.puts
    end

    # Gives you a switch in the current context
    def switch(name,aliases,desc,long_desc,negetable)
      if negetable
        name = "[no-]#{name}" if name.to_s.length > 1
        aliases = aliases.map { |_|  _.to_s.length > 1 ? "[no-]#{_}" : _ }
      end
      invocations = ([name] + aliases).map { |_| add_dashes(_) }.join('|')
      #@io.puts "#{@nest}## #{invocations}"
      @io.puts "* `#{invocations}`  "
      @io.puts String(desc).strip + "  "
      #@io.puts
      #@io.puts String(long_desc).strip
      @io.puts
    end

    def end_options
      #@io.puts "</div>"
    end

    def commands
      #@io.puts "#{@nest}## Commands"
      #@nest = "#{@nest}#"
    end

    # Gives you a command in the current context and creates a new context of this command
    def command(name,aliases,desc,long_desc,arg_name,arg_options)
      @commands.push(name)
      #@io.puts "#{@nest}## Command: <tt>#{([name] + aliases).join('|')} #{@arg_name_formatter.format(arg_name,arg_options)}</tt>"
      @io.puts
      @io.puts "#{@nest}# #{@commands.join ' '} #{@arg_name_formatter.format(arg_name,arg_options)}"
      @io.puts
      @io.puts String(desc).strip
      @io.puts
      @io.puts String(long_desc).strip
      @nest = "#{@nest}#"
    end

    # Ends a command, and "pops" you back up one context
    def end_command(name)
      @nest.gsub!(/\#$/,'')
      @commands.pop
    end

    # Gives you the name of the current command in the current context
    def default_command(name)
      @io.puts "Default Command: #{name}" unless name.nil?
    end

    def end_commands
      @nest.gsub!(/\#$/,'')
    end

  private

    def add_dashes(name)
      name = "-#{name}"
      name = "-#{name}" if name.length > 2
      name
    end


  end
end