import random
import json
import time
import hmac
import hashlib
import base64
import logging
from hashlib import md5

import requests
from celery import shared_task

logger = logging.getLogger(__name__)

from .views.info.baidu_lang_info import (
    cuid, mac, p_code, p_lang_type,
    y_speech_type, pcm_y_lang_type, y_lang_type
)
from .views.info.baidu_fanyi_appid import appid, appkey, endpoint


def make_md5(s, encoding='utf-8'):
    return md5(s.encode(encoding)).hexdigest()


@shared_task
def baidu_translate_task(query, from_lang, to_lang):
    path = '/api/trans/vip/translate'
    url = endpoint + path

    salt = random.randint(32768, 65536)
    sign = make_md5(appid + query + str(salt) + appkey)

    headers = {'Content-Type': 'application/x-www-form-urlencoded'}
    payload = {'appid': appid, 'q': query, 'from': from_lang, 'to': to_lang, 'salt': salt, 'sign': sign}

    try:
        r = requests.post(url, params=payload, headers=headers, timeout=15)
        result = r.json()
    except requests.exceptions.Timeout:
        return {'success': False, 'error_code': 'TIMEOUT', 'error_msg': '百度翻译API请求超时，请重试'}
    except requests.exceptions.RequestException as e:
        return {'success': False, 'error_code': 'NETWORK_ERROR', 'error_msg': f'网络请求异常: {str(e)}'}
    except ValueError:
        return {'success': False, 'error_code': 'PARSE_ERROR', 'error_msg': '百度翻译API响应格式异常'}

    if 'error_code' in result and result['error_code'] != 0:
        return {'success': False, 'error_code': result.get('error_code'), 'error_msg': result.get('error_msg', '')}

    return {'success': True, 'data': result}


@shared_task
def baidu_recognize_lang_task(query):
    path = '/api/trans/vip/language'
    url = endpoint + path

    salt = random.randint(32768, 65536)
    sign = make_md5(appid + query + str(salt) + appkey)

    headers = {'Content-Type': 'application/x-www-form-urlencoded'}
    payload = {'appid': appid, 'q': query, 'salt': salt, 'sign': sign}

    try:
        r = requests.post(url, params=payload, headers=headers, timeout=15)
        result = r.json()
    except requests.exceptions.Timeout:
        return {'success': False, 'error_code': 'TIMEOUT', 'error_msg': '百度翻译API请求超时，请重试'}
    except requests.exceptions.RequestException as e:
        return {'success': False, 'error_code': 'NETWORK_ERROR', 'error_msg': f'网络请求异常: {str(e)}'}
    except ValueError:
        return {'success': False, 'error_code': 'PARSE_ERROR', 'error_msg': '百度翻译API响应格式异常'}

    code = result.get('error_code')
    if code == 0:
        return {'success': True, 'data': result}
    else:
        return {'success': False, 'error_code': code, 'error_msg': result.get('error_msg', '')}


@shared_task
def baidu_picture_translate_task(file_data_base64, from_lang, to_lang, picture_type):
    file_data = base64.b64decode(file_data_base64)

    path = '/api/trans/sdk/picture'
    url = endpoint + path

    salt = random.randint(32768, 65536)
    sign = make_md5(appid + md5(file_data).hexdigest() + str(salt) + cuid + mac + appkey)

    payload = {'from': from_lang, 'to': to_lang, 'appid': appid, 'salt': salt, 'sign': sign, 'cuid': cuid, 'mac': mac}
    image = {'image': (f"p_image.{picture_type}", file_data, "multipart/form-data")}

    try:
        response = requests.post(url, params=payload, files=image, timeout=20)
        result = response.json()
    except requests.exceptions.Timeout:
        return {'success': False, 'error_code': 'TIMEOUT', 'error_info': '百度图片翻译API请求超时，请重试'}
    except requests.exceptions.RequestException as e:
        return {'success': False, 'error_code': 'NETWORK_ERROR', 'error_info': f'网络请求异常: {str(e)}'}
    except ValueError:
        return {'success': False, 'error_code': 'PARSE_ERROR', 'error_info': '百度图片翻译API响应格式异常'}

    if result.get('error_code') == 0:
        return {'success': True, 'data': result}
    else:
        error_info = p_code.get(result.get('error_code'), {})
        return {'success': False, 'error_code': result.get('error_code'), 'error_info': error_info}


@shared_task
def baidu_speech_recognize_task(audio_data_base64, from_lang, to_lang, speech_type):
    voice = base64.b64decode(audio_data_base64)

    timestamp = str(int(time.time()))
    path = "/api/trans/v2/voicetrans"
    url = endpoint + path

    msg = appid + timestamp + audio_data_base64
    sign = base64.b64encode(hmac.new(appkey.encode("utf-8"), msg.encode("utf-8"), digestmod=hashlib.sha256).digest())

    headers = {
        "Content-Type": "application/json",
        "X-Appid": appid,
        "X-Timestamp": timestamp,
        "X-Sign": sign,
        "X-EncryptType": "hmac256"
    }

    data = {
        "format": speech_type,
        "voice": audio_data_base64,
        "to": to_lang,
        "from": from_lang,
    }

    try:
        response = requests.post(url, headers=headers, json=data, timeout=20)
        result = response.json()
    except requests.exceptions.Timeout:
        return {'success': False, 'error_code': 'TIMEOUT', 'error_msg': '百度语音翻译API请求超时，请重试'}
    except requests.exceptions.RequestException as e:
        return {'success': False, 'error_code': 'NETWORK_ERROR', 'error_msg': f'网络请求异常: {str(e)}'}
    except ValueError:
        return {'success': False, 'error_code': 'PARSE_ERROR', 'error_msg': '百度语音翻译API响应格式异常'}

    return {'success': True, 'data': result}


@shared_task
def record_translate_usage(translate_type, from_lang, to_lang, text_length, user_id=None, ip_address=None):
    from .models import TranslateUsage

    user = None
    if user_id is not None:
        from django.contrib.auth import get_user_model
        User = get_user_model()
        try:
            user = User.objects.get(pk=user_id)
        except User.DoesNotExist:
            user = None

    try:
        TranslateUsage.objects.create(
            user=user,
            translate_type=translate_type,
            from_lang=from_lang,
            to_lang=to_lang,
            text_length=text_length,
            ip_address=ip_address,
        )
    except Exception as e:
        logger.error(f"记录翻译使用量失败: {e}")