# coding=utf-8
from django.shortcuts import render, HttpResponseRedirect, get_object_or_404, HttpResponse
from django.contrib.auth.models import User
from metadata.models import LineItem, Order, Favorite, Cart
from django.contrib import messages
from django.contrib.auth import authenticate, login, logout


# Create your views here.


def user_login(request):
    username = None
    password = None
    if request.method == 'POST':
        if not request.POST.get('username'):
            messages.error(request, u'请输入用户名')
        else:
            username = request.POST.get('username')
        if not request.POST.get('password'):
            messages.error(request, u'请输入密码')
        else:
            password = request.POST.get('password')
        if username is not None and password is not None:
            user = authenticate(username=username, password=password)
            if user is not None:
                if user.is_active:
                    login(request, user)
                    cart = Cart.objects.filter(user_id=user.id)
                    if not cart:
                        cart = Cart()
                        cart.user_id = user.id
                        cart.save()
                    count = LineItem.objects.filter(cart=user.cart).count()
                    request.session['count'] = count
                    return HttpResponseRedirect('/')
                else:
                    messages.error(request, 'disabled username')
            else:
                messages.error(request, 'invalid user')
    return render(request, 'account/login.html')


def user_register(request):
    username = None
    email = None
    password = None
    confirm_password = None
    flag = False

    if request.method == 'POST':
        if not request.POST.get('username'):
            messages.error(request, u'请输入用户名')
        else:
            username = request.POST.get('username')
        if not request.POST.get('email'):
            messages.error(request, u'请输入邮箱')
        else:
            email = request.POST.get('email')
        if not request.POST.get('password'):
            messages.error(request, u'请输入密码')
        else:
            password = request.POST.get('password')
        if not request.POST.get('confirm_password'):
            messages.error(request, u'请再次输入密码')
        else:
            confirm_password = request.POST.get('confirm_password')

        if password is not None and confirm_password is not None:
            if password == confirm_password:
                flag = True
            else:
                messages.error(request, u'两次输入的密码不一致，请重新输入')

        filter_result = User.objects.filter(username=username)
        if len(filter_result) > 0:
            messages.error(request, u"对不起，您输入的用户名已被注册")
            return render(request, "account/register.html")

        if username is not None and password is not None and confirm_password is not None and email is not None and flag:
            user = User.objects.create_user(username, email, password)
            user.is_active = True
            user.save()
            messages.success(request, u'注册成功')
            return HttpResponseRedirect('/account/login')

    return render(request, 'account/register.html')


def user_logout(request):
    logout(request)
    messages.error(request, u'您已经成功退出系统')
    return HttpResponseRedirect('/')


def cart(request):
    user = request.user
    current_cart = user.cart
    cart_id = current_cart.id
    items = LineItem.objects.filter(cart_id=cart_id).all()

    return render(request, 'account/my_cart.html', {"items": items})


def favorite(request):
    user = request.user
    favorites = Favorite.objects.filter(user=user).all()
    return render(request, 'account/my_favorite.html', {"favorites": favorites})


def delete_cart_data(request, id):
    line_item = get_object_or_404(LineItem, pk=id)
    line_item.delete()
    messages.success(request, u'您购物车中的数据已被成功删除！')

    return HttpResponseRedirect('/account/cart')


def delete_favorite(request, id):
    favorite = get_object_or_404(Favorite, pk=id)
    favorite.delete()
    messages.success(request, u'您收藏的数据已被成功删除！')

    return HttpResponseRedirect('/account/favorite')


def add_to_order(request):
    if request.method == 'POST':
        item_ids = request.POST.getlist('item_ids')
        items = LineItem.objects.filter(id__in=item_ids).all()

        return render(request, 'account/new_order.html', {"items": items})


def save_to_order(request):
    if request.method == 'POST':
        real_name = request.POST.get('real_name')
        email = request.POST.get('email')
        phone = request.POST.get('phone')
        post_code = request.POST.get('post_code')
        unit = request.POST.get('unit')
        address = request.POST.get('address')
        purpose = request.POST.get('purpose')
        item_ids = request.POST.getlist('item_ids')
        user = request.user
        order = Order(real_name=real_name, email=email, phone=phone, post_code=post_code,
                      unit=unit, address=address, purpose=purpose, user=user)
        order.save()
        for item_id in item_ids:
            item = get_object_or_404(LineItem, pk=item_id)
            item.cart_id = None
            item.save()
            order.lineitem_set.add(item)

        messages.success(request, u'您的数据申请已经提交')
        return HttpResponseRedirect('/account/order')


def my_order(request):
    user = request.user
    orders = Order.objects.filter(user=user).exclude(lineitem=None)
    return render(request, 'account/my_order.html', {"orders": orders})