#  Copyright (c) 2021 Arm Limited. All rights reserved.
#  SPDX-License-Identifier: Apache-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.

"""
Utility script to generate the minimum InputFiles.hpp and cpp files required by an application.
"""
import datetime
import os

from argparse import ArgumentParser
from jinja2 import Environment, FileSystemLoader

parser = ArgumentParser()
parser.add_argument("--header_folder_path", type=str, help="path to header folder to be generated.")
parser.add_argument("--license_template", type=str, help="Header template file",
                    default="header_template.txt")
args = parser.parse_args()

env = Environment(loader=FileSystemLoader(os.path.join(os.path.dirname(__file__), 'templates')),
                  trim_blocks=True,
                  lstrip_blocks=True)


def write_hpp_file(header_file_path, header_template_file):
    print(f"++ Generating {header_file_path}")
    header_template = env.get_template(header_template_file)
    hdr = header_template.render(script_name=os.path.basename(__file__),
                                 gen_time=datetime.datetime.now(),
                                 year=datetime.datetime.now().year)
    env.get_template('default.hpp.template').stream(common_template_header=hdr) \
        .dump(str(header_file_path))


def main(args):
    header_filename = "InputFiles.hpp"
    header_filepath = os.path.join(args.header_folder_path, header_filename)
    write_hpp_file(header_filepath, args.license_template)


if __name__ == '__main__':
    main(args)