require "pathname"
require "erb"

Import = Object.new
class << Import
  def script
    @script ||= nil
    @script
  end

  def config
    @config ||= nil
    @config
  end

  def init(name)
    @script = read(name)
    @config = ERB.new(read("#{name}.yml") || "").result
    info
  end

  # returns Hash { "pull" => "/home/dk/.doit/pull", ... }
  def list
    @list ||= list2
  end

  def info
    return unless Doit.options[:verbose]

    My.verbose "SCRIPT", @script
    My.verbose "CONFIG(yml)", @config
  end

  private

  def list2
    res = {}
    Pathname.pwd.descend { |dir|
      doit_dir = dir + ".doit"
      next unless File.directory?(doit_dir)

      lst = []
      Dir.entries(doit_dir).each { |name|
        name = File.join(doit_dir, name)

        next unless File.executable?(name)
        next if File.directory?(name)

        lst << name
      }
      lst.each { |itm| res[File.basename(itm)] = itm }
    }
    res
  end

  def read(name)
    try_ascend(".doit/#{name}")
  end

  def try_ascend(filename)
    Pathname.pwd.ascend { |dir|
      str = dir + filename
      return File.read(str) if File.exist?(str)
    }
    nil
  end
end