# Copyright 2020 Google LLC
#
# 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.

"""Writes a fea file for ligature lookup for multi-codepoint RGIs"""

# TODO if this is a qualified sequence create the unqualified version and vice versa


from absl import app
from absl import flags
from nanoemoji import glyphmap
from nanoemoji import features
from nanoemoji import util

FLAGS = flags.FLAGS

flags.DEFINE_string("output_file", "-", "Output filename ('-' means stdout)")


def main(argv):
    with util.file_printer(FLAGS.output_file) as print:
        sequences = sorted(
            {
                gm.codepoints
                for gm in glyphmap.parse_csv(argv[1])
                if len(gm.codepoints) > 1
            }
        )
        print(features.generate_fea(sequences))


if __name__ == "__main__":
    app.run(main)
