import time
import random

from werkzeug.security import generate_password_hash

from common.db import insert_data, find_data
from user.scripts import check_mail_fmt, check_pwd_fmt
from common.security.rsa import decrypt_data


def create_user_process(email, name, pwd, role, duty):
    """
    创建新用户流程
    Parameters:
        email str 邮箱
        name str 姓名
        pwd str 密码
        role str 角色
        duty str 职责
    Returns:
        执行成功 bool True
        执行失败 str 异常信息
    """
    def check_params():
        """
        参数检查
        """
        roles = ['admin', 'member', 'guest']
        if role not in roles:
            return "用户角色异常"

        duties = ['developers', 'analysts', None]
        if duty not in duties:
            return "成员职责异常"

        if not check_mail_fmt(email):
            return "邮箱格式错误"

        if not check_pwd_fmt(pwd):
            return "密码格式错误"

        if len(find_data("tfse_admin", "用户", "用户信息", {"email": email})) > 0:
            return "邮箱已被注册"

        return True

    def gen_new_uid():
        """
        生成新的用户ID，如果该ID存在，则重新生成
        Returns:
            生成的用户ID
        """

        def make_id(num):
            """
            随机生成字符串
            """
            choices = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
            salt = ''
            for i in range(num):
                salt += random.choice(choices)
            return salt

        def gen_id():
            """
            生成新ID，
            检查新ID是否存在，如果存在则继续生成新ID
            若新ID可使用，返回新ID
            """
            new_id = make_id(8)
            case = find_data("tfse_admin", "用户", "用户信息", {"企业ID": new_id}) is []
            while case:
                new_id = make_id(8)
            return new_id

        return gen_id()

    def process_main():
        """
        执行流程
        """
        check_param_result = check_params()
        if check_param_result is not True:
            return check_param_result

        user = dict()
        user['UID'] = gen_new_uid()
        user['email'] = email
        user['name'] = name
        user['pwd'] = generate_password_hash(decrypt_data(encrypt_msg=pwd))
        user['status'] = 'normal'
        user['role'] = role
        user['duty'] = duty
        user['create_time'] = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())

        insert_data("tfse_admin", "用户", "用户信息", user)

        return True

    return process_main()