from django.contrib import auth
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from rest_framework.authtoken.models import Token
from rest_framework.authentication import BasicAuthentication, TokenAuthentication
from .serializers import UserRegisterSerializer

from django.middleware.csrf import get_token
from django.contrib.auth import login

from api.utils import *
from api.models import File, Mission
import requests

import json

class CalculateAPI(APIView):
  def post(self, request):
    user = request.user
    try:
      mission = Mission.objects.get(id=request.data.get('mission'))
    except Mission.DoesNotExist:
      return failed(message="处理任务控制失败，未找到处理任务")
    except Exception as error:
      print("处理任务控制失败", error)
      return failed(message="处理任务控制失败，未找到处理任务")
    
    command = request.data.get('command')
    try:
      assert command in ['start', 'pause', 'stop']
    except Exception as error:
      print("处理任务控制代码错误")
      return failed(message="处理任务控制失败，控制代码错误")

    # 向调度程序提交计算任务
    # mission = request.json['mission']
    # plans = request.json['plans']
    calculateData = {
      'mission': {
        'id': mission.id,
      },
      'plans': []
    }
    rootPlan = mission.own_plans.get(parent=None)
    calculateData['plans'].append({
      'id': rootPlan.id,
      'nodes': mission.nodeFile.toJson(),
      'edges': mission.edgeFile.toJson(),
      'children': list(mission.own_plans.filter(parent=rootPlan).values_list('id', flat=True)),
    })

    rootPlans = [ child for child in mission.own_plans.filter(parent=rootPlan)]
    while rootPlans:
      tempPlans = rootPlans.copy()
      rootPlans = []
      for p in tempPlans:
        children = [ child for child in mission.own_plans.filter(parent=p)]
        # 判断是否父节点存在计算结果，有则作为子节点输入
        if hasattr(p.parent, 'own_result'):
          calculateData['plans'].append({
            'id': p.id,
            'algorithm': p.algorithm.name,
            'nodes': p.parent.own_result.nodeFile.toJson(),
            'edges': p.parent.own_result.edgeFile.toJson(),
            'children': [child.id for child in children],
          })
        else:
          calculateData['plans'].append({
            'id': p.id,
            'algorithm': p.algorithm.name,
            'nodes': None,
            'edges': None,
            'children': [child.id for child in children],
          })
        rootPlans.extend(children)
    requests.post(SCHEDULER_BASE_URL + '/addMission', json=calculateData)
    
    return success(message="成功启动计算")