# Copyright 2018 Xiaomi, Inc.  All rights reserved.
#
# 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.

import argparse
import sys
import numpy as np
import re

# Validation Flow:
# 1. Generate input data
#    python generate_data.py \
#        --input_node input_node \
#        --input_shape 1,64,64,3 \
#        --input_file input_file
#


def generate_data(name, shape):
    np.random.seed()
    data = np.random.random(shape) * 2 - 1
    input_file_name = FLAGS.input_file + "_" + re.sub('[^0-9a-zA-Z]+', '_',
                                                      name)
    print 'Generate input file: ', input_file_name
    data.astype(np.float32).tofile(input_file_name)


def main(unused_args):
    input_names = [name for name in FLAGS.input_node.split(',')]
    input_shapes = [shape for shape in FLAGS.input_shape.split(':')]
    assert len(input_names) == len(input_shapes)
    for i in range(len(input_names)):
        shape = [int(x) for x in input_shapes[i].split(',')]
        generate_data(input_names[i], shape)
    print "Generate input file done."


def parse_args():
    """Parses command line arguments."""
    parser = argparse.ArgumentParser()
    parser.register("type", "bool", lambda v: v.lower() == "true")
    parser.add_argument(
        "--input_file", type=str, default="", help="input file.")
    parser.add_argument(
        "--input_node", type=str, default="input_node", help="input node")
    parser.add_argument(
        "--input_shape", type=str, default="1,64,64,3", help="input shape.")

    return parser.parse_known_args()


if __name__ == '__main__':
    FLAGS, unparsed = parse_args()
    main(unused_args=[sys.argv[0]] + unparsed)