# treevisitor
require 'treevisitor/tree_node_visitor'
require 'treevisitor/dir_tree_walker'
require 'treevisitor/visitors/callback_tree_node_visitor2'

# ralbum
require 'ralbum/catalog'
require 'ralbum/photo_tree/photo_tree_item'
require 'ralbum/photo_tree/photo_tree_node'

class JalbumPhotoTreeBuilder

  def run( phototree_dirname )
    photoTree = build_photo_tree_from_directory( phototree_dirname )
    # read_meta_info_old_format( photoTree )
    # update_meta_info( photoTree )
    photoTree
  end

  # ------------------------------------------------------------------------------
  #
  # build photo tree senza metainfo
  #

  def build_photo_tree_from_directory( jalbum_dirname )
    ralbum_verbose( 1, "phototree - building phototree from #{jalbum_dirname}" )

    @photo_tree_dirname = jalbum_dirname
    dtw = DirTreeWalker.new( jalbum_dirname )

    # TODO: ignorare tutti le directory che iniziano per "." questa deve essere un'opzione di DirTreeWalker
    dtw.add_ignore_dir( ".svn" )
    dtw.add_ignore_dir( ".csv" )
    dtw.add_ignore_dir( ".git" )
    dtw.add_ignore_dir( Catalog::DEFAULT_CATALOG_DIRNAME )

    dtw.add_ignore_pattern(".jalbum")

    visitor = CallbackTreeNodeVisitor2.new(self)
    dtw.run( visitor ).root # return a photo_tree
  end

  def on_enter_tree_node(pathname, parent)
    # puts "_on_enter_tree_node #{pathname}"

    if parent.nil?
      photo_tree_node = PhotoTreeNode.new( File.basename(pathname) , parent )
      photo_tree_node.prefix_path= File.dirname( pathname ) + File::SEPARATOR
    else
      photo_tree_node = PhotoTreeNode.new( File.basename(pathname), parent )
    end

    albumfiles_path = File.join(pathname, "albumfiles.txt")
    if File.exist?( albumfiles_path )
      create_leaf_node_from_album_file( photo_tree_node, albumfiles_path )
    end
    photo_tree_node
  end

  def on_visit_leaf_node( src_leaf_node, parent_node )
  end

  def create_leaf_node_from_album_file(parent, albumfiles_path)
    # puts "-----------------"
    File.open(albumfiles_path).each_line do |line|
      i = line.index('#')
      if i
        next if i == 0
        line = [0..i-1].strip
      end
      next if line.length == 0

      image_filename = line.split("\t")[1]
      next if image_filename.nil?
      image_filename.chomp!
      # puts image_filename

      PhotoTreeItem.new(image_filename, parent )
    end
    # puts "----------------"
  end

end