from django.contrib import messages
from django.contrib.auth import authenticate, login, logout, update_session_auth_hash
from django.contrib.auth.forms import PasswordChangeForm
from django.contrib.auth.mixins import LoginRequiredMixin
from django.shortcuts import redirect, render
from django.urls import reverse_lazy
from django.views.generic import ListView, TemplateView, View

from fossdb.models import Project

from .forms import LoginForm, SignUpForm, UserChangeForm


class ProfileUpdateView(LoginRequiredMixin, TemplateView):
    template_name = "setting.html"
    login_url = reverse_lazy("login")
    redirect_field_name = "redirect_to"

    def get(self, request):
        user_form = UserChangeForm(instance=request.user)
        context = {
            "title": "Your profile",
            "user_form": user_form,
        }
        return self.render_to_response(context)

    def post(self, request):
        user_form = UserChangeForm(request.POST, instance=request.user)

        if user_form.is_valid():
            user_form.save()
            messages.add_message(request, messages.SUCCESS, "Your profile was successfully updated!")

        context = {
            "title": "Your profile",
            "user_form": user_form,
        }
        return self.render_to_response(context)


class PasswordChangeView(LoginRequiredMixin, TemplateView):
    template_name = "password.html"

    def get(self, request):
        form = PasswordChangeForm(user=request.user)
        context = {
            "title": "Change password",
            "form": form,
        }
        return self.render_to_response(context)

    def post(self, request):
        form = PasswordChangeForm(data=request.POST, user=request.user)
        if form.is_valid():
            form.save()

            update_session_auth_hash(request, form.user)
            messages.add_message(request, messages.SUCCESS, "Your password was successfully updated!")

        context = {
            "title": "Change password",
            "form": form,
        }
        return self.render_to_response(context)


class ProfileProjectListView(LoginRequiredMixin, ListView):
    model = Project
    template_name = "profile.html"
    context_object_name = "projects"
    login_url = reverse_lazy("login")
    redirect_field_name = "redirect_to"

    def get_queryset(self):
        return Project.objects.filter(owner=self.request.user)

    def get_context_data(self, *args, **kwargs):
        data = super().get_context_data(**kwargs)
        data["title"] = self.request.user.username + ("" if not self.request.user.full_name else f" ({self.request.user.full_name})")
        return data


def signup_view(request):
    form = SignUpForm(request.POST or None)
    if request.method == "POST":
        if form.is_valid():
            user = form.save()
            raw_password = form.cleaned_data.get("password1")
            user = authenticate(username=user.username, password=raw_password)
            login(request, user)
            return redirect("homepage")

    context = {
        "title": "FOSSDB | SignUp",
        "form": form,
    }
    return render(request, "signup.html", context)


def login_view(request):
    form = LoginForm(data=request.POST or None)
    if request.method == "POST":
        if form.is_valid():
            user = form.get_user()
            login(request, user)
            return redirect("homepage")

    context = {
        "title": "FOSSDB | Login",
        "form": form,
    }
    return render(request, "login.html", context)


class LogoutView(View):
    def get(self, request):
        logout(request)
        return redirect("login")