# delete dst, then:
# copy the placeholders to dst
# then copy the noto images to dst
# then copy the draft images to dst, skipping names with parens and
# after fixing the case of the names

import glob
import os
from os import path
import re
import shutil

DST = "/tmp/placeholder_emoji_plus"

SRC_PLACEHOLDER = "/tmp/placeholder_emoji"
SRC_NOTO = "/usr/local/google/users/dougfelt/newnoto/noto-emoji/png/128"
SRC_DRAFT = "/usr/local/google/home/dougfelt/Downloads/PNG_latest_working_draft"

# First, scan the draft images and select which ones to use.  This does
# two things:
# - The download package returns all the images, including previous versions.
#   Ensure we use the one with the highest version.
# - The names often mix case.  Make sure we have all lower case names.
#
# If something seems amiss, we fail.

UPDATED_NAMES = {}
FIXED_NAMES = {}
VAR_PAT = re.compile(r'(.*?)\((\d+)\)\.png')
for fname in glob.glob(path.join(SRC_DRAFT, '*.png')):
  name = path.basename(fname)
  m = VAR_PAT.match(name)
  if m:
    name = '%s.png' % m.group(1).lower()
    version = int(m.group(2))
    if version > UPDATED_NAMES.get(name, (0, None))[0]:
      print 'update %s to version %d' % (name, version)
      UPDATED_NAMES[name] = (version, fname)
  else:
    name = name.lower()
    FIXED_NAMES[name] = fname

for name in UPDATED_NAMES:
  if name not in FIXED_NAMES:
    raise Exception('updated name %s not in names' % name)
  fname = UPDATED_NAMES[name][1]
  print 'using updated image %s for %s' % (fname, name)
  FIXED_NAMES[name] = fname

# Now, recreate the destination directory and copy the data into it.

if path.isdir(DST):
  shutil.rmtree(DST)
os.makedirs(DST)

SKIP_PLACEHOLDERS = frozenset([
  'emoji_u1f468_200d_1f469_200d_1f466.png',
  'emoji_u1f469_200d_2764_fe0f_200d_1f468.png',
  'emoji_u1f469_200d_2764_fe0f_200d_1f48b_200d_1f468.png',
])

for fname in glob.glob(path.join(SRC_PLACEHOLDER, '*.png')):
  basename = path.basename(fname)
  if basename in SKIP_PLACEHOLDERS:
    print 'skip %s' % basename
    continue
  shutil.copy(fname, DST)

for fname in glob.glob(path.join(SRC_NOTO, '*.png')):
  shutil.copy(fname, DST)

for name, fname in FIXED_NAMES.iteritems():
  shutil.copy(fname, path.join(DST, name))