from django.http import HttpResponse
from django.shortcuts import render
from django.contrib.auth.decorators import login_required
from models import Group
from django.contrib.auth.models import User
import json

# Create your views here.
DEBUG = 1


# 首先是 加入/退出 群组，客户端发送申请，把该用户直接 加入/删除 该群组的对象
@login_required(login_url='/account/login/')
def add_group(request):
    if request.method == 'post':
        # 查找是否有此人
        user = User.objects.filter(username=request.user.username)
        if user:
            # 查找此人是否已经在群组里
            group = Group.objects.filter(group_id=request.Group.group_id).get()
            if user in group.member:
                # 此人已在群组里
                return HttpResponse(status=421)
            else:
                group.member.add(user)
                group.save()
                return HttpResponse(status=200)
        else:
            return HttpResponse(status=422)
    elif request.method == 'GET':
        if DEBUG:
            return render(request, 'add_group.html')
    else:
        return HttpResponse(status=400)


@login_required(login_url='/account/login/')
def leave_group(request):
    if request.method == 'post':
        # 查找是否有此人
        user = User.objects.filter(username=request.user.username)
        if user:
            # 查找此人是否已经在群组里
            group = Group.objects.filter(group_id=request.Group.group_id).get()
            if user in group.member:
                # 此人已在群组里
                return HttpResponse(status=421)
            else:
                group.member.delete(user)
                group.save()
                return HttpResponse(status=200)
        else:
            return HttpResponse(status=422)
    elif request.method == 'GET':
        if DEBUG:
            return render(request, 'leave_group.html')
    else:
        return HttpResponse(status=400)


# 获取你所在的所有群组
@login_required(login_url='/account/login/')
def group_list(request):
    if request.method == 'POST':
        # 获取群组
        groups = Group.objects.filter(member__username=request.user.username)
        response = []
        for i in groups:
            response.append(i)
        return HttpResponse(json.dumps(response), status=200)
    elif request.method == 'GET':
        if DEBUG:
            return render(request, 'group_list.html')
    else:
        return HttpResponse(status=400)