"""
/* Copyright (c) 2023 Amazon
   Written by Jan Buethe */
/*
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
"""

import os
import argparse


from scipy.io import wavfile
from pesq import pesq
import numpy as np
from moc import compare
from moc2 import compare as compare2
#from warpq import compute_WAPRQ as warpq
from lace_loss_metric import compare as laceloss_compare


parser = argparse.ArgumentParser()
parser.add_argument('folder', type=str, help='folder with processed items')
parser.add_argument('metric', type=str, choices=['pesq', 'moc', 'moc2', 'laceloss'], help='metric to be used for evaluation')


def get_bitrates(folder):
    with open(os.path.join(folder, 'bitrates.txt')) as f:
        x = f.read()

    bitrates = [int(y) for y in x.rstrip('\n').split()]

    return bitrates

def get_itemlist(folder):
    with open(os.path.join(folder, 'items.txt')) as f:
        lines = f.readlines()

    items = [x.split()[0] for x in lines]

    return items


def process_item(folder, item, bitrate, metric):
    fs, x_clean  = wavfile.read(os.path.join(folder, 'clean', f"{item}_{bitrate}_clean.wav"))
    fs, x_opus   = wavfile.read(os.path.join(folder, 'opus', f"{item}_{bitrate}_opus.wav"))
    fs, x_lace   = wavfile.read(os.path.join(folder, 'lace', f"{item}_{bitrate}_lace.wav"))
    fs, x_nolace = wavfile.read(os.path.join(folder, 'nolace', f"{item}_{bitrate}_nolace.wav"))

    x_clean  = x_clean.astype(np.float32) / 2**15
    x_opus   = x_opus.astype(np.float32) / 2**15
    x_lace   = x_lace.astype(np.float32) / 2**15
    x_nolace = x_nolace.astype(np.float32) / 2**15

    if metric == 'pesq':
        result = [pesq(fs, x_clean, x_opus), pesq(fs, x_clean, x_lace), pesq(fs, x_clean, x_nolace)]
    elif metric =='moc':
        result = [compare(x_clean, x_opus), compare(x_clean, x_lace), compare(x_clean, x_nolace)]
    elif metric =='moc2':
        result = [compare2(x_clean, x_opus), compare2(x_clean, x_lace), compare2(x_clean, x_nolace)]
    # elif metric == 'warpq':
        # result = [warpq(x_clean, x_opus), warpq(x_clean, x_lace), warpq(x_clean, x_nolace)]
    elif metric == 'laceloss':
        result = [laceloss_compare(x_clean, x_opus), laceloss_compare(x_clean, x_lace), laceloss_compare(x_clean, x_nolace)]
    else:
        raise ValueError(f'unknown metric {metric}')

    return result

def process_bitrate(folder, items, bitrate, metric):
    results = np.zeros((len(items), 3))

    for i, item in enumerate(items):
        results[i, :] = np.array(process_item(folder, item, bitrate, metric))

    return results


if __name__ == "__main__":
    args = parser.parse_args()

    items = get_itemlist(args.folder)
    bitrates = get_bitrates(args.folder)

    results = dict()
    for br in bitrates:
        print(f"processing bitrate {br}...")
        results[br] = process_bitrate(args.folder, items, br, args.metric)

    np.save(os.path.join(args.folder, f'results_{args.metric}.npy'), results)

    print("Done.")