from django.contrib import messages
from django.contrib.auth import login, logout
from django.contrib.auth.decorators import login_required
from django.contrib.auth.views import LoginView
from django.shortcuts import redirect, render
from django.urls import reverse
from django.views.decorators.http import require_http_methods

from accounts.forms import (
    CustomerAuthenticationForm,
    CustomerProfileForm,
    CustomerRegisterForm,
)
from accounts.services import claim_orders_for_user, get_customer_profile


class PortalLoginView(LoginView):
    template_name = "accounts/login.html"

    def get_success_url(self):
        url = self.get_redirect_url()
        if url:
            return url
        if self.request.user.is_staff:
            return reverse("dashboard:home")
        return reverse("account:home")


class CustomerLoginView(LoginView):
    template_name = "accounts/customer_login.html"
    authentication_form = CustomerAuthenticationForm
    redirect_authenticated_user = True

    def get_success_url(self):
        url = self.get_redirect_url()
        if url:
            return url
        if self.request.user.is_staff:
            return reverse("dashboard:home")
        return reverse("account:home")


@require_http_methods(["GET", "POST"])
def customer_register(request):
    if request.user.is_authenticated:
        return redirect("account:home")
    if request.method == "POST":
        form = CustomerRegisterForm(request.POST)
        if form.is_valid():
            user = form.save()
            get_customer_profile(user)
            claimed = claim_orders_for_user(user)
            login(request, user)
            if claimed:
                messages.success(
                    request,
                    f"Account created. {claimed} existing order(s) are now in your history.",
                )
            else:
                messages.success(request, "Account created. Welcome.")
            return redirect("account:home")
    else:
        initial = {}
        email = (request.GET.get("email") or "").strip()
        if email:
            initial["email"] = email
        form = CustomerRegisterForm(initial=initial)
    return render(request, "accounts/register.html", {"form": form})


@require_http_methods(["GET", "POST"])
def customer_logout(request):
    logout(request)
    messages.success(request, "Signed out.")
    return redirect("public:home")


@login_required(login_url="account:login")
def customer_home(request):
    from django.apps import apps

    if apps.is_installed("shop"):
        return redirect("account:orders")
    return redirect("account:profile")


@login_required(login_url="account:login")
@require_http_methods(["GET", "POST"])
def customer_profile(request):
    profile = get_customer_profile(request.user)
    addr = profile.shipping_address or {}
    initial = {
        "first_name": request.user.first_name,
        "last_name": request.user.last_name,
        "phone": profile.phone,
        "address_line1": addr.get("line1") or "",
        "address_line2": addr.get("line2") or "",
        "address_city": addr.get("city") or "",
        "address_state": addr.get("state") or "",
        "address_zip": addr.get("zip") or "",
    }
    if request.method == "POST":
        form = CustomerProfileForm(request.POST)
        if form.is_valid():
            request.user.first_name = form.cleaned_data.get("first_name") or ""
            request.user.last_name = form.cleaned_data.get("last_name") or ""
            request.user.save(update_fields=["first_name", "last_name"])
            profile.phone = form.cleaned_data.get("phone") or ""
            profile.shipping_address = form.shipping_address()
            profile.save(update_fields=["phone", "shipping_address", "updated_at"])
            messages.success(request, "Profile saved.")
            return redirect("account:profile")
    else:
        form = CustomerProfileForm(initial=initial)
    return render(
        request,
        "accounts/profile.html",
        {"form": form, "profile": profile},
    )