from django.shortcuts import render,redirect
from django.contrib.auth.models import User
from django.http import HttpResponse
from django.contrib.auth import authenticate
from django.contrib import auth
# Create your views here.
def showall(request):
    mynames = ''
    for i in User.objects.all():
        #myname += str(i) + '<br>'
        mynames += i.username + '<br>'
    return HttpResponse(mynames)

def find(request):
    try:
        a1 = User.objects.get(username='john')
        return HttpResponse('找到john')
    except:
        a1 = None
        return HttpResponse('查無此人')

def add(request):
    #要新增一筆:tom
    #先判別是否已經存在資料表內
    try:
        a1 = User.objects.get(username='mike')        
    except:
        a1 = None
    #若無，則新增一筆
    if a1==None:
       a2 = User.objects.create_user('mike','mike@gmail.com','mike963852')
       a2.first_name = '麥克'
       a2.last_name = '李'
       a2.is_staff = True
       a2.save()
       return redirect('/showall/')
    else:
        return HttpResponse('mike 已經存在')

def index(request):
    return render(request,'index.html',locals())

def login(request):
    mylogin = False
    if request.method =='POST':
        myname = request.POST['myname']
        mypw = request.POST['mypw']
        #驗證是否是user資料表成員
        a1 = auth.authenticate(username=myname,password=mypw)
        #判別是否為有效成員，且通過驗證
        if a1 is not None:
            if a1.is_active:
                auth.login(request,a1)
                message = '已經成功登入'
                return redirect('/index/')
                #return render(request,'index.html',locals())
            else:
                message = '帳號還沒有開始啟用'
        else:
            message = '沒有這個帳號'
    return render(request,'login.html',locals())
    #return redirect('/login/')    

def logout(request):
    auth.logout(request)
    #return render(request,'index.html',locals())
    return redirect('/index/')