"""ACRCloud model."""
import base64
import hashlib
import hmac
import json
import sys
import time

import requests

from src import config
from src.config import app_logger
from src.constant import acrcloud as acrcloud_constant


def identify(audio_fingerprint):
    """Identify audio fingerprint."""
    http_method = 'POST'
    acrcloud_identification_api_path = '/v1/identify'
    data_type = 'fingerprint'
    signature_version = '1'
    timestamp = time.time()
    acrcloud_identification_api_url = (
        f'{config.ACRCLOUD_IDENTIFICATION_API_HOST}{acrcloud_identification_api_path}')

    request_info = '\n'.join([
        http_method,
        acrcloud_identification_api_path,
        config.ACRCLOUD_IDENTIFICATION_API_ACCESS_KEY,
        data_type,
        signature_version,
        str(timestamp)
    ])

    request_signature = base64.b64encode(
        hmac.new(
            config.ACRCLOUD_IDENTIFICATION_API_ACCESS_SECRET.encode('ascii'),
            request_info.encode('ascii'),
            digestmod=hashlib.sha1
        ).digest()
    ).decode('ascii')

    filename = None
    files = [
        ('sample', (filename, audio_fingerprint))
    ]
    data = {
        'access_key': config.ACRCLOUD_IDENTIFICATION_API_ACCESS_KEY,
        'sample_bytes': sys.getsizeof(audio_fingerprint),
        'timestamp': str(timestamp),
        'signature': request_signature,
        'data_type': data_type,
        'signature_version': signature_version
    }

    audio_matches_response = requests.post(acrcloud_identification_api_url, files=files, data=data)

    if audio_matches_response.status_code != 200:
        error_message = (
            f'ACRCloud API returned http status code: '
            f'{audio_matches_response.status_code}, and text: '
            f'{audio_matches_response.text}'
        )
        app_logger.error(error_message)
        raise Exception(error_message)

    audio_matches_response.encoding = 'utf-8'
    audio_matches_response_data = audio_matches_response.json()

    api_response_code = audio_matches_response_data['status']['code']
    if api_response_code not in acrcloud_constant.SUCCESS_CODES:
        error_message = (
            f'ACRCloud API returned http status code: '
            f'{audio_matches_response.status_code}, and json: '
            f'{json.dumps(audio_matches_response_data)}'
        )
        app_logger.error(error_message)
        raise Exception(error_message)

    return audio_matches_response.json()