# coding:utf-8

from rest_framework.permissions import BasePermission
from apps.Equipment.models import Device
from .db_utils import MySQLTool


class RegisterViewPermission(BasePermission):
    def has_permission(self, request, view):
        try:
            user = request.user
            if user['username'] == "管理员":
                return True
            else:
                return False
        except:
            return False


class ModulePermission(BasePermission):
    def has_permission(self, request, view):
        try:
            user = request.user
            user_modules = user.get("user_modules")
            path = request.path
            if path.startswith("/equipment") and user_modules == "1":
                return True
            else:
                return False
        except:
            return False


class DeviceDetailPermission(BasePermission):
    def has_permission(self, request, view):
        try:
            user = request.user
            uid = user.get("uid")
            user_modules = user.get("user_modules")
            deviceId = request.data.get("device_id")
            device = Device.objects.filter(device_id=deviceId, owner_id=int(uid))
            if user_modules == "1" and device.exists():
                return True
            else:
                return False
        except:
            return False


def get_bigdata_user_uid(token):
    sql = f'''select uid from sa_device_user where api_token={token}'''
    m = MySQLTool()
    result = m.execute_by_one(sql)
    uid = result['uid']
    return uid


class AccessPermission(BasePermission):
    def has_permission(self, request, view):
        try:
            auth = request.MATE['HTTP_AUTHORIZATION']
            temp_list = auth.split()
            if temp_list[0] != 'Bearer':
                raise Exception()
            token = temp_list[1]
            try:
                uid = request.session['bigdata_uid']
            except KeyError as e:
                uid = get_bigdata_user_uid(token)
                request.session['bigdata_uid'] = uid
                request.session.save()
            request.bigdata_uid = uid
        except Exception as e:
            return False
        return True