# import main Flask class and request object
from flask import Flask, request      #Flask for post requests
import xml.etree.ElementTree as ET     #XML tree toolkit
import os.path, time, torch     
from argparse import ArgumentParser
from nemo.collections.asr.metrics.wer import WER, word_error_rate
from nemo.collections.asr.models import EncDecCTCModel
from nemo.utils import logging

#Get Phrase from Library
def getPhrase(itemNum):
    tree = ET.parse('phrase.xml')
    root = tree.getroot()
    text = root.find('.//phrase[@id="{value}"]'.format(value=itemNum)).text
    print("{}. {}".format(itemNum, text))
    return text

# Get Key of phrase in-time
def getKey(string):
    #!echo $text | phonemize > key.txt
    with open('key.txt','r') as file:
        key = file.read()
    return(key)

#Run ASR
def Grade(key, input):
    parser = ArgumentParser()
    parser.add_argument(
        "--asr_model", type=str, default="QuartzNet15x5Base-En", required=True, help="Pass: 'QuartzNet15x5Base-En'",
    )
    parser.add_argument("--dataset", type=str, required=True, help="path to evaluation data")
    parser.add_argument("--batch_size", type=int, default=4)
    parser.add_argument("--wer_tolerance", type=float, default=1.0, help="used by test")
    parser.add_argument(
        "--normalize_text", default=True, type=bool, help="Normalize transcripts or not. Set to False for non-English."
    )
    args = parser.parse_args(["--dataset", "dataset.json", "--asr_model", "QuartzNet15x5Base-En"])
    torch.set_grad_enabled(False)

    if args.asr_model.endswith('.nemo'):
        logging.info(f"Using local ASR model from {args.asr_model}")
        asr_model = EncDecCTCModel.restore_from(restore_path=args.asr_model)
    else:
        logging.info(f"Using NGC cloud ASR model {args.asr_model}")
        asr_model = EncDecCTCModel.from_pretrained(model_name=args.asr_model)
    asr_model.setup_test_data(
        test_data_config={
            'sample_rate': 16000,
            'manifest_filepath': args.dataset,
            'labels': asr_model.decoder.vocabulary,
            'batch_size': args.batch_size,
            'normalize_transcripts': args.normalize_text,
        }
    )
    if can_gpu:
        asr_model = asr_model.cuda()
    asr_model.eval()
    labels_map = dict([(i, asr_model.decoder.vocabulary[i]) for i in range(len(asr_model.decoder.vocabulary))])
    wer = WER(vocabulary=asr_model.decoder.vocabulary)
    hypotheses = []
    references = []
    for test_batch in asr_model.test_dataloader():
        if can_gpu:
            test_batch = [x.cuda() for x in test_batch]
        with autocast():
            log_probs, encoded_len, greedy_predictions = asr_model(
                input_signal=test_batch[0], input_signal_length=test_batch[1]
            )
        hypotheses += wer.ctc_decoder_predictions_tensor(greedy_predictions)
        for batch_ind in range(greedy_predictions.shape[0]):
            reference = ''.join([labels_map[c] for c in test_batch[2][batch_ind].cpu().detach().numpy()])
            references.append(reference)
        del test_batch
    wer_value = word_error_rate(hypotheses=hypotheses, references=references)
    
    for h, r in zip(hypotheses, references):
      print("Recognized:\t{}\nReference:\t{}\n".format(h, r))

    logging.info(f'Got WER of {wer_value}. Tolerance was {args.wer_tolerance}')
    return wer_value


# create the Flask app
app = Flask(__name__)

@app.route('/hole', methods=['POST'])
def query():
# arguments args
    if (action == 1): #Run the ASR
        # take chunks, convert back to audio
        key = getKey(text)
        score = Grade(key, text)
        return score

    elif (action == 2):
        #
    elif (action == 3):
        #
    ###

    #chunks = request.args['audio']
    
    #always check for chunks file -> call Grade()

    print(test)
    return 'Query String Example'


if __name__ == '__main__':
    # run app in debug mode on port 5000
    app.run(debug=True, port=5000)