from django.shortcuts import render, redirect, HttpResponse
from django.http import JsonResponse, HttpResponseRedirect
from django.views.generic import View
# from . import models
from .models import User, Menu
from django.core.serializers import serialize
import json


# Create your views here.

def index(request):
    data = {
        'name': {
            'firstname': 'Tom',
            'lastname': 'john'
        },
        'age': 18,
        'sex': '男'
    }
    return JsonResponse(data, json_dumps_params={"ensure_ascii": False})

# class cbv(View):
#   def get(self,request):
#     print(request)
#     print(request.GET.get('username'))
#     return JsonResponse({'method':'get','data':request.GET})

#   def post(self,request):
#     return JsonResponse({'method':'post','data':request.POST})
#   def put(self,request):
#     return JsonResponse({'method':'put'})
#   def delete(self,request):
#     return JsonResponse({'method':'delete'})

# class extend_cbv(cbv):
#   # 重写post请求
#   def post(self,request):
#     return JsonResponse({'method':'post','msg':'重写post请求'},json_dumps_params={"ensure_ascii":False})


def format_useinfo(user):
    format_user = json.loads(
        serialize('json', user, ensure_ascii=False)
    )
    for item in format_user:
        res = item.get('fields')
        res['userId'] = item.get('pk')
        res['roles'] = [
            {
                'roleName': res.get('roleName'), 'value': res.get('value')
            }
        ]
        res.pop('roleName')
        res.pop('value')
    return res


def format_menus(data):
    # 一级菜单列表(无父id)
    menus = []
    # 子菜单列表
    childrens = []
    for item in data:
        item['fields']['id'] = item.get('pk')
        # 将某些字段合并处理成前台需要的路由结构
        item['fields']['meta'] = {
            "title": item.get('fields').get('title'),
            "affix": item.get('fields').get('affix'),
            "icon": item.get('fields').get('icon'),
        }
        # 删除多余字段
        item['fields'].pop('title')
        item['fields'].pop('affix')
        item['fields'].pop('icon')
        if (item.get('fields').get('parent') == None):
            menus.append(item.get('fields'))
        else:
            childrens.append(item.get('fields'))

    for children in childrens:
        # 将列表转化成树形菜单
        getTree(children, menus, childrens)
    return menus


"""
def getTree(children, menus, childrens)
根据传递过来的父菜单id，递归设置各层次父菜单的子菜单列表
:children: 单个子菜单
:param menus: 父菜单列表 一级菜单
:childrens： 子菜单列表，第二次调用
"""


def getTree(children, menus, childrens):
    # 遍历父菜单
    for m in menus:
        # 当前菜单的id 和 子菜单的父id 是否匹配
        if m.get('id') == children.get('parent'):
            if not m.get('children'):
                m['children'] = []
            if not children in m['children']:  # 判单子菜单是否已存在
                m['children'].append(children)

            if m.get('children'):
                for children in childrens:
                    # 判断子菜单是否还有匹配的子菜单
                    getTree(children, m.get('children'), childrens)


class login(View):

    def post(self, request):
        data = json.loads(request.body)
        user = User.objects.all().filter(username=data.get(
            'username'), password=data.get('password'))
        if user:
            res = format_useinfo(user)
            return JsonResponse({'code': 0, 'msg': 'success', 'result': res}, json_dumps_params={"ensure_ascii": False})
        else:
            return JsonResponse({'code': 1, 'error': '用户名或密码不正确'}, json_dumps_params={"ensure_ascii": False})


class getUserInfoById(View):
    def get(self, request):
        userid = request.GET.get('userId')
        user = User.objects.all().filter(id=userid)
        if user:
            # res = {'codeList': ['1000', '3000', '5000']}
            res = format_useinfo(user)
            return JsonResponse({'code': 0, 'result': res, })
        else:
            return JsonResponse({'code': 1, 'result': {'message': 'error'}}, json_dumps_params={"ensure_ascii": False})


class add_user(View):
    def post(self, request):
        data = request.POST
        if User.objects.all().filter(username=data.get('username')):
            return JsonResponse({'code': 0, 'error': '该角色名已被创建'})
        else:
            User.objects.create(**data)
            return JsonResponse({'code': 1, 'data': '角色创建成功'})


class getMenuListById(View):
    def get(self, request):
        querySetObj = Menu.objects.all()

        # querySet 转json对象
        data = json.loads(serialize('json', querySetObj, ensure_ascii=False))
        menus = format_menus(data)
        return JsonResponse({'code': 0, 'result': menus})


class add_menu(View):
    def post(self, request):
        data = request.POST
        Menu.objects.create(**data)
        return JsonResponse({'code': 1, 'error': '菜单添加成功'})