module ACGT

# File lib/acgt.rb, line 34
def edit_template
  @options[:edit] = true
end

# File lib/acgt.rb, line 38
def get_template_file template
  get_template_file_from_cwd(template) || get_template_file_from_home(template)
end

# File lib/acgt.rb, line 50
def get_template_file_from dir, template
  file = File.join(File.absolute_path(dir), "#{ template }.mote")
  file if File.exists?(file)
end

# File lib/acgt.rb, line 42
def get_template_file_from_cwd template
  get_template_file_from File.join(Dir.pwd, ".acgt"), template
end

# File lib/acgt.rb, line 46
def get_template_file_from_home template
  get_template_file_from(File.join(ENV["HOME"], ".acgt"), template)
end

# File lib/acgt.rb, line 10
def help
  readme = File.expand_path("../README", File.dirname(__FILE__))
  exec "${PAGER:-less} #{ readme }"
end

# File lib/acgt.rb, line 15
def output path
  @options[:output] = File.absolute_path(path)
end

# File lib/acgt.rb, line 19
def parse params
  {}.tap do |vars|
    params.each do |param|
      name, value = param.split(":", 2)
      name = name.to_sym
      if vars[name]
        vars[name] = [vars[name]] unless vars[name].is_a?(Array)
        vars[name] << value if value && !value.empty?
      else
        vars[name] = value
      end
    end
  end
end

# File lib/acgt.rb, line 55
def render template, params
  vars = parse params
  Mote.parse(File.read(template), self, vars.keys).call(vars)
end

# File lib/acgt.rb, line 60
def run template, params
  file = get_template_file template

  if @options[:edit]
    if file.nil?
      file = File.join(ENV["HOME"], ".acgt", "#{template}.mote")
      STDERR.puts "Creating template #{ file }"
    end
    exec "$EDITOR #{ file }"
  end

  if file.nil?
    STDERR.puts "Template #{template} doesn't exists in #{Dir.pwd}/.acgt or ~/.acgt."
    exit 1
  end

  dna = render file, params

  if @options[:output]
    output = File.absolute_path(@options[:output])
    STDOUT.puts "Generating #{output}"
    File.open(output, "w") do |fp|
      fp.write dna
    end
  else
    STDOUT.puts dna
  end
end