# Copyright (c) 2021 PaddlePaddle Authors. 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 base64
import io
import json
import os
import random
import time
from typing import List

import numpy as np
import requests
import soundfile

from paddlespeech.server.util import cli_register
from paddlespeech.server.utils.audio_process import wav2pcm


@cli_register(name='paddleserver.ttsclient', description='visit tts service')
class TTSClientExecutor():
    def __init__(self):
        super().__init__()
        self.parser = argparse.ArgumentParser()
        self.parser.add_argument(
            '--server_ip', type=str, default='127.0.0.1', help='server ip')
        self.parser.add_argument(
            '--port', type=int, default=8090, help='server port')
        self.parser.add_argument(
            '--text',
            type=str,
            default="你好，欢迎使用语音合成服务",
            help='A sentence to be synthesized')
        self.parser.add_argument(
            '--spk_id', type=int, default=0, help='Speaker id')
        self.parser.add_argument(
            '--speed', type=float, default=1.0, help='Audio speed')
        self.parser.add_argument(
            '--volume', type=float, default=1.0, help='Audio volume')
        self.parser.add_argument(
            '--sample_rate',
            type=int,
            default=0,
            help='Sampling rate, the default is the same as the model')
        self.parser.add_argument(
            '--output',
            type=str,
            default="./out.wav",
            help='Synthesized audio file')

    # Request and response
    def tts_client(self, args):
        """ Request and response
        Args:
            text: A sentence to be synthesized
            outfile: Synthetic audio file
        """
        url = 'http://' + args.server_ip + ":" + str(
            args.port) + '/paddlespeech/tts'
        request = {
            "text": args.text,
            "spk_id": args.spk_id,
            "speed": args.speed,
            "volume": args.volume,
            "sample_rate": args.sample_rate,
            "save_path": args.output
        }

        response = requests.post(url, json.dumps(request))
        response_dict = response.json()
        wav_base64 = response_dict["result"]["audio"]

        audio_data_byte = base64.b64decode(wav_base64)
        # from byte
        samples, sample_rate = soundfile.read(
            io.BytesIO(audio_data_byte), dtype='float32')

        # transform audio
        outfile = args.output
        if outfile.endswith(".wav"):
            soundfile.write(outfile, samples, sample_rate)
        elif outfile.endswith(".pcm"):
            temp_wav = str(random.getrandbits(128)) + ".wav"
            soundfile.write(temp_wav, samples, sample_rate)
            wav2pcm(temp_wav, outfile, data_type=np.int16)
            os.system("rm %s" % (temp_wav))
        else:
            print("The format for saving audio only supports wav or pcm")

        return len(samples), sample_rate

    def execute(self, argv: List[str]) -> bool:
        args = self.parser.parse_args(argv)
        st = time.time()
        try:
            samples_length, sample_rate = self.tts_client(args)
            time_consume = time.time() - st
            print("Save synthesized audio successfully on %s." % (args.output))
            print("Inference time: %f" % (time_consume))
        except:
            print("Failed to synthesized audio.")