"""
通用方法类
"""
from django.http import HttpResponse
import json
from datetime import date, datetime
from django.db import connection
from django.conf import settings
import hashlib
import decimal


class CJsonEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, datetime):
            return obj.strftime('%Y-%m-%d %H:%M:%S')
        elif isinstance(obj, date):
            return obj.strftime('%Y-%m-%d')
        elif isinstance(obj, decimal.Decimal):  # python无法json_dumps decimal类型,转成float型
            return float(obj)
        else:
            return json.JSONEncoder.default(self, obj)


def sql_array(result, select):
    """
    sql数据查询转换为数组
    :param result:查询结果
    :param select:查询的字段
    :return:
    """
    return_list = []
    for i in result:
        val_list = {}
        for j in select:
            val_list[j] = i.__getattribute__(j)  # 获取字段的值
        return_list.append(val_list)
    return return_list


def re_su(msg='', data='', url='', code=0):
    """
    返回成功信息
    :param msg:
    :param data:
    :param url:
    :param code:
    :return:
    """
    if data == '':
        data = {}
    result = {
        'flag': True,
        'msg': msg,
        'data': data,
        'url': url,
        'code': code
    }
    return result


def re_err(msg, data='', url='', code=1):
    """
    返回报错信息到上一层
    :param msg:
    :param data:
    :param url:
    :param code:
    :return:
    """
    if data == '':
        data = {}
    result = {
        'flag': False,
        'msg': msg,
        'data': data,
        'url': url,
        'code': code
    }
    return result


def re_json_su(msg='', data='', url='', code=0):
    """
    返回 失败错误信息
    :param msg:
    :param data:
    :param url:
    :param code:
    :return:
    """
    if data == '':
        data = {}
    result = {
        'flag': True,
        'msg': msg,
        'data': data,
        'url': url,
        'code': code
    }
    return HttpResponse(json.dumps(result, cls=CJsonEncoder))


def re_json_err(msg, data='', url='', code=1):
    """
    返回json报错信息到前端
    :param msg:
    :param data:
    :param url:
    :param code:
    :return:
    """
    if data == '':
        data = {}
    result = {
        'flag': False,
        'msg': msg,
        'data': data,
        'url': url,
        'code': code
    }
    return HttpResponse(json.dumps(result, cls=CJsonEncoder))


def re_json(data):
    """
    返回字符串
    :param data:
    :return:
    """
    return HttpResponse(json.dumps(data, cls=CJsonEncoder))


def select_all(sql, param):
    """
    select查询
    :param sql:
    :return:
    """
    cursor = connection.cursor()
    cursor.execute(sql, param)
    items = cursor.fetchall()  # 读取所有
    desc = cursor.description
    li = []
    if items:
        for item in items:
            d = {}
            i = 0
            for de in desc:
                d[de[0]] = str(item[i])
                i = i + 1
            li.append(d)
        return li
    else:
        return li


def select_row(sql, param):
    """
    select查询
    :param sql:
    :return:
    """
    cursor = connection.cursor()
    cursor.execute(sql, param)
    items = cursor.fetchall()  # 读取所有
    desc = cursor.description
    li = []
    if items:
        for item in items:
            d = {}
            i = 0
            for de in desc:
                d[de[0]] = item[i]
                i = i + 1
            li.append(d)
        return li[0]
    else:
        return li


def auth_code_for_cs(request_time):
    """
    cs接口调用加密函数
    :param request_time:
    :return:
    """
    request_time = str(request_time)
    user = settings.ADM_USER
    user_key = settings.ADM_USER_KEY
    # 加密规则为 request_time(linux时间戳)前三位作为种子+ user + user_key+后三位,进行MD5加密后，换成大写字母
    auth_code = (
        request_time[0:3] + "|" + user + "|" + user_key + "|" + request_time[(len(request_time) - 3):len(request_time)])
    m2 = hashlib.md5()  # 进行md5加密
    m2.update(auth_code.encode("utf-8"))
    return m2.hexdigest().upper()


def get_client_ip(request):
    """
    获取用户ip
    :param request:
    :return:
    """
    try:
        real_ip = request.META['HTTP_X_FORWARDED_FOR']
        regip = real_ip.split(",")[0]
    except:
        try:
            regip = request.META['REMOTE_ADDR']
        except:
            regip = ""
    return regip