from django.contrib import messages
from django.contrib.auth import login, authenticate, logout
from django.shortcuts import render, redirect, get_object_or_404
from django.http import JsonResponse
from django.views.decorators.http import require_POST, require_GET
from django.views.decorators.csrf import csrf_exempt
from django import forms
from django.contrib.auth.decorators import login_required
from accounts.models import Profile
from accounts.forms import CustomerForm
from common.consts import UserRoles


# Create your views here.
def login_view(request):
    """
    renders login page and authenticating user POST requests
    to log user in
    """
    if request.method == "POST":
        username = request.POST.get("username")
        password = request.POST.get("password")
        user = authenticate(request, username=username, password=password)
        if user is not None:
            login(request, user)
            return redirect("processes:request_list")
        else:
            messages.error(request, "کاربری با این مشخصات یافت نشد!")
            return redirect("accounts:login")

    return render(request, "accounts/login.html")

def dashboard(request):
    return render(request, "accounts/dashboard.html")


@login_required
def customer_list(request):
    # Get all profiles that have customer role
    customers = Profile.objects.filter(roles__slug=UserRoles.CUSTOMER.value, is_deleted=False).select_related('user')
    
    form = CustomerForm()
    return render(request, "accounts/customer_list.html", {
        "customers": customers,
        "form": form
    })


@require_POST
def add_customer_ajax(request):
    """AJAX endpoint for adding customers"""
    form = CustomerForm(request.POST, request.FILES)
    form.request = request  # Pass request to form
    if form.is_valid():
        try:
            customer = form.save()
            return JsonResponse({
                'success': True,
                'message': 'مشترک با موفقیت اضافه شد!',
                'customer': {
                    'id': customer.id,
                    'name': customer.user.get_full_name(),
                    'username': customer.user.username,
                    'phone': customer.phone_number_1 or 'ثبت نشده',
                    'national_code': customer.national_code or 'ثبت نشده',
                    'status': 'تکمیل شده' if customer.is_completed else 'ناقص'
                }
            })
        except forms.ValidationError as e:
            return JsonResponse({
                'success': False,
                'message': str(e)
            })
        except Exception as e:
            return JsonResponse({
                'success': False,
                'message': f'خطا در ذخیره مشترک: {str(e)}'
            })
    else:
        return JsonResponse({
            'success': False,
            'message': 'خطا در اعتبارسنجی فرم',
            'errors': form.errors
        })


@require_POST
def edit_customer_ajax(request, customer_id):
    customer = get_object_or_404(Profile, id=customer_id)
    form = CustomerForm(request.POST, request.FILES, instance=customer)
    form.request = request  # Pass request to form
    if form.is_valid():
        try:
            customer = form.save()
            return JsonResponse({
                'success': True,
                'message': 'مشترک با موفقیت ویرایش شد!',
                'customer': {
                    'id': customer.id,
                    'name': customer.user.get_full_name(),
                    'username': customer.user.username,
                    'phone': customer.phone_number_1 or 'ثبت نشده',
                    'national_code': customer.national_code or 'ثبت نشده',
                    'status': 'تکمیل شده' if customer.is_completed else 'ناقص'
                }
            })
        except forms.ValidationError as e:
            return JsonResponse({
                'success': False,
                'message': str(e)
            })
        except Exception as e:
            return JsonResponse({
                'success': False,
                'message': f'خطا در ویرایش مشترک: {str(e)}'
            })
    else:
        return JsonResponse({
            'success': False,
            'message': 'خطا در اعتبارسنجی فرم',
            'errors': form.errors
        })

@require_GET
def get_customer_data(request, customer_id):
    customer = get_object_or_404(Profile, id=customer_id)
    
    # Create form with existing customer data
    form = CustomerForm(instance=customer, initial={
        'first_name': customer.user.first_name,
        'last_name': customer.user.last_name,
    })
    
    # Render form fields as HTML
    form_html = {
        'first_name': str(form['first_name']),
        'last_name': str(form['last_name']),
        'phone_number_1': str(form['phone_number_1']),
        'phone_number_2': str(form['phone_number_2']),
        'national_code': str(form['national_code']),
        'card_number': str(form['card_number']),
        'account_number': str(form['account_number']),
        'address': str(form['address']),
        'bank_name': str(form['bank_name']),
    }
    
    return JsonResponse({
        'success': True,
        'customer': {
            'id': customer.id,
            'first_name': customer.user.first_name,
            'last_name': customer.user.last_name,
            'phone_number_1': customer.phone_number_1 or '',
            'phone_number_2': customer.phone_number_2 or '',
            'national_code': customer.national_code or '',
            'card_number': customer.card_number or '',
            'account_number': customer.account_number or '',
            'address': customer.address or '',
            'bank_name': customer.bank_name or '',
        },
        'form_html': form_html
    })


def logout_view(request):
    """Log out current user and redirect to login page."""
    logout(request)
    return redirect("accounts:login")
