require 'ostruct'
require 'fs/MiqFS/MiqFS'
require 'fs/MiqFsUtil'
require 'fs/MetakitFS/MetakitFS'
require 'fs/MiqFS/modules/LocalFS'

SRC_DIR = "../../../.."
DST_DIR = "copy_dst"
MK_FILE = "mkfs"

require 'logger'
STDOUT.sync = true
STDERR.sync = true
$log = Logger.new(STDERR)
$log.level = Logger::DEBUG

#
# First, copy files from the local filesystem to another directory in the local filesystem.
#

fromFs  = MiqFS.new(LocalFS, nil)
toFs  = MiqFS.new(LocalFS, nil)

cf    = MiqFsUtil.new(fromFs, toFs)
cf.verbose = true

#
# Make sure the destination directory exists and is empty.
#
toFs.rmBranch(DST_DIR) if toFs.fileDirectory?(DST_DIR)
toFs.dirMkdir(DST_DIR)

#
# Recursively copy the directory contents.
#
puts "Copying #{SRC_DIR} to #{DST_DIR}"
cf.copy(SRC_DIR, DST_DIR, true)
puts "copy complete"

#
# Compare the contents of the original directory to that of its copy.
# They should be the same.
#
dd = File.join(DST_DIR, File.basename(SRC_DIR))
puts "Comparing #{SRC_DIR} to #{dd}"
system("diff", "-qr", SRC_DIR, dd)
if $?.exitstatus != 0
  puts "FAIL: Directory contents are not the same"
  exit($?.exitstatus)
else
  puts "SUCCESS: Directory contents match"
end

#
# Now, copy files from the local filesystem to a metakit filesystem.
#

#
# Create a new metakit filesystem.
#
File.delete(MK_FILE) if File.exist?(MK_FILE)
dobj = OpenStruct.new
dobj.mkfile = MK_FILE
dobj.create = true
toFs = MiqFS.new(MetakitFS, dobj)

#
# Set the new metakit filssystem as the destination of the copy.
#
cf.toFs = toFs

#
# Recursively copy the directory contents.
#
puts "Copying #{SRC_DIR} to / (on mkfs)"
cf.copy(SRC_DIR, "/", true)
puts "copy complete"

#
# Now, reverse the copy.
# Copy files out of the metakit FS to the local FS.
#
fromFs, toFs = toFs, fromFs
cf.toFs = toFs
cf.fromFs = fromFs

#
# Make sure the destination directory exists and is empty.
#
toFs.rmBranch(DST_DIR) if toFs.fileDirectory?(DST_DIR)
toFs.dirMkdir(DST_DIR)

puts
puts "Copying /vmdb (on mkfs) to #{DST_DIR}"
cf.copy("/vmdb", DST_DIR, true)
puts "copy complete"

#
# Compare the contents of the original directory to that of its copy.
# They should be the same.
#
puts
puts "Comparing #{SRC_DIR} to #{dd}"
system("diff", "-qr", SRC_DIR, dd)
if $?.exitstatus != 0
  puts "FAIL: Directory contents are not the same"
  exit($?.exitstatus)
else
  puts "SUCCESS: Directory contents match"
end

#
# Clean up.
#
File.delete(MK_FILE) if File.exist?(MK_FILE)
toFs.rmBranch(DST_DIR) if toFs.fileDirectory?(DST_DIR)