#
# Author:: John Keiser (<jkeiser@opscode.com>)
# Copyright:: Copyright (c) 2012 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require 'chef_fs/file_system/base_fs_dir'
require 'chef_fs/file_system/rest_list_dir'
require 'chef_fs/file_system/not_found_error'
require 'chef_fs/file_system/must_delete_recursively_error'
require 'chef_fs/path_utils'
require 'fileutils'

module ChefFS
  module FileSystem
    class FileSystemEntry < BaseFSDir
      def initialize(name, parent, file_path = nil)
        super(name, parent)
        @file_path = file_path || "#{parent.file_path}/#{name}"
      end

      attr_reader :file_path

      def path_for_printing
        file_path
      end

      def children
        begin
          Dir.entries(file_path).sort.select { |entry| entry != '.' && entry != '..' }.map { |entry| FileSystemEntry.new(entry, self) }
        rescue Errno::ENOENT
          raise ChefFS::FileSystem::NotFoundError.new(self, $!)
        end
      end

      def create_child(child_name, file_contents=nil)
        child = FileSystemEntry.new(child_name, self)
        if file_contents
          child.write(file_contents)
        else
          Dir.mkdir(child.file_path)
        end
        @children = nil
        child
      end

      def dir?
        File.directory?(file_path)
      end

      def delete(recurse)
        if dir?
          if !recurse
            raise MustDeleteRecursivelyError.new(self, $!)
          end
          FileUtils.rm_rf(file_path)
        else
          File.delete(file_path)
        end
      end

      def read
        begin
          File.open(file_path, "rb") {|f| f.read}
        rescue Errno::ENOENT
          raise ChefFS::FileSystem::NotFoundError.new(self, $!)
        end
      end

      def write(content)
        File.open(file_path, 'wb') do |file|
          file.write(content)
        end
      end
    end
  end
end
