from django.views.generic import DetailView, ListView, CreateView, UpdateView
from django.shortcuts import get_object_or_404, render
from django.urls import reverse
from django.db.models import Q
from django.contrib.auth.mixins import LoginRequiredMixin
from django.contrib.contenttypes.models import ContentType
from django.http import HttpRequest, HttpResponse, Http404
from django.db.models import Count
from .models import Ride, RideModel, CATEGORY_CHOICES, Company
from .forms import RideForm, RideSearchForm
from parks.models import Park
from moderation.mixins import EditSubmissionMixin, HistoryMixin
from moderation.models import EditSubmission


class ParkContextRequired:
    """Mixin to require park context for views"""

    def dispatch(self, request, *args, **kwargs):
        if "park_slug" not in self.kwargs:
            raise Http404("Park context is required")
        return super().dispatch(request, *args, **kwargs)


def show_coaster_fields(request: HttpRequest) -> HttpResponse:
    """Show roller coaster specific fields based on category selection"""
    category = request.GET.get("category")
    if category != "RC":  # Only show for roller coasters
        return HttpResponse("")
    return render(request, "rides/partials/coaster_fields.html")


class RideDetailView(HistoryMixin, DetailView):
    """View for displaying ride details"""

    model = Ride
    template_name = "rides/ride_detail.html"
    slug_url_kwarg = "ride_slug"

    def get_queryset(self):
        """Get ride for the specific park if park_slug is provided"""
        queryset = (
            Ride.objects.all()
            .select_related("park", "ride_model", "ride_model__manufacturer")
            .prefetch_related("photos")
        )

        if "park_slug" in self.kwargs:
            queryset = queryset.filter(park__slug=self.kwargs["park_slug"])

        return queryset

    def get_context_data(self, **kwargs):
        """Add context data"""
        context = super().get_context_data(**kwargs)
        if "park_slug" in self.kwargs:
            context["park_slug"] = self.kwargs["park_slug"]
            context["park"] = self.object.park

        return context


class RideCreateView(LoginRequiredMixin, ParkContextRequired, CreateView):
    """View for creating a new ride"""

    model = Ride
    form_class = RideForm
    template_name = "rides/ride_form.html"

    def get_success_url(self):
        """Get URL to redirect to after successful creation"""
        return reverse(
            "parks:rides:ride_detail",
            kwargs={
                "park_slug": self.park.slug,
                "ride_slug": self.object.slug,
            },
        )

    def get_form_kwargs(self):
        """Pass park to the form"""
        kwargs = super().get_form_kwargs()
        self.park = get_object_or_404(Park, slug=self.kwargs["park_slug"])
        kwargs["park"] = self.park
        return kwargs

    def get_context_data(self, **kwargs):
        """Add park and park_slug to context"""
        context = super().get_context_data(**kwargs)
        context["park"] = self.park
        context["park_slug"] = self.park.slug
        context["is_edit"] = False
        return context

    def form_valid(self, form):
        """Handle form submission including new items"""
        # Check for new manufacturer
        manufacturer_name = form.cleaned_data.get("manufacturer_search")
        if manufacturer_name and not form.cleaned_data.get("manufacturer"):
            EditSubmission.objects.create(
                user=self.request.user,
                content_type=ContentType.objects.get_for_model(Company),
                submission_type="CREATE",
                changes={"name": manufacturer_name, "roles": ["MANUFACTURER"]},
            )

        # Check for new designer
        designer_name = form.cleaned_data.get("designer_search")
        if designer_name and not form.cleaned_data.get("designer"):
            EditSubmission.objects.create(
                user=self.request.user,
                content_type=ContentType.objects.get_for_model(Company),
                submission_type="CREATE",
                changes={"name": designer_name, "roles": ["DESIGNER"]},
            )

        # Check for new ride model
        ride_model_name = form.cleaned_data.get("ride_model_search")
        manufacturer = form.cleaned_data.get("manufacturer")
        if ride_model_name and not form.cleaned_data.get("ride_model") and manufacturer:
            EditSubmission.objects.create(
                user=self.request.user,
                content_type=ContentType.objects.get_for_model(RideModel),
                submission_type="CREATE",
                changes={
                    "name": ride_model_name,
                    "manufacturer": manufacturer.id,
                },
            )

        return super().form_valid(form)


class RideUpdateView(
    LoginRequiredMixin, ParkContextRequired, EditSubmissionMixin, UpdateView
):
    """View for updating an existing ride"""

    model = Ride
    form_class = RideForm
    template_name = "rides/ride_form.html"
    slug_url_kwarg = "ride_slug"

    def get_success_url(self):
        """Get URL to redirect to after successful update"""
        return reverse(
            "parks:rides:ride_detail",
            kwargs={
                "park_slug": self.park.slug,
                "ride_slug": self.object.slug,
            },
        )

    def get_queryset(self):
        """Get ride for the specific park"""
        return Ride.objects.filter(park__slug=self.kwargs["park_slug"])

    def get_form_kwargs(self):
        """Pass park to the form"""
        kwargs = super().get_form_kwargs()
        self.park = get_object_or_404(Park, slug=self.kwargs["park_slug"])
        kwargs["park"] = self.park
        return kwargs

    def get_context_data(self, **kwargs):
        """Add park and park_slug to context"""
        context = super().get_context_data(**kwargs)
        context["park"] = self.park
        context["park_slug"] = self.park.slug
        context["is_edit"] = True
        return context

    def form_valid(self, form):
        """Handle form submission including new items"""
        # Check for new manufacturer
        manufacturer_name = form.cleaned_data.get("manufacturer_search")
        if manufacturer_name and not form.cleaned_data.get("manufacturer"):
            EditSubmission.objects.create(
                user=self.request.user,
                content_type=ContentType.objects.get_for_model(Company),
                submission_type="CREATE",
                changes={"name": manufacturer_name, "roles": ["MANUFACTURER"]},
            )

        # Check for new designer
        designer_name = form.cleaned_data.get("designer_search")
        if designer_name and not form.cleaned_data.get("designer"):
            EditSubmission.objects.create(
                user=self.request.user,
                content_type=ContentType.objects.get_for_model(Company),
                submission_type="CREATE",
                changes={"name": designer_name, "roles": ["DESIGNER"]},
            )

        # Check for new ride model
        ride_model_name = form.cleaned_data.get("ride_model_search")
        manufacturer = form.cleaned_data.get("manufacturer")
        if ride_model_name and not form.cleaned_data.get("ride_model") and manufacturer:
            EditSubmission.objects.create(
                user=self.request.user,
                content_type=ContentType.objects.get_for_model(RideModel),
                submission_type="CREATE",
                changes={
                    "name": ride_model_name,
                    "manufacturer": manufacturer.id,
                },
            )

        return super().form_valid(form)


class RideListView(ListView):
    """View for displaying a list of rides"""

    model = Ride
    template_name = "rides/ride_list.html"
    context_object_name = "rides"

    def get_queryset(self):
        """Get filtered rides based on search and filters"""
        queryset = (
            Ride.objects.all()
            .select_related("park", "ride_model", "ride_model__manufacturer")
            .prefetch_related("photos")
        )

        # Park filter
        if "park_slug" in self.kwargs:
            self.park = get_object_or_404(Park, slug=self.kwargs["park_slug"])
            queryset = queryset.filter(park=self.park)

        # Search term handling
        search = self.request.GET.get("q", "").strip()
        if search:
            # Split search terms for more flexible matching
            search_terms = search.split()
            search_query = Q()

            for term in search_terms:
                term_query = (
                    Q(name__icontains=term)
                    | Q(park__name__icontains=term)
                    | Q(description__icontains=term)
                )
                search_query &= term_query

            queryset = queryset.filter(search_query)

        # Category filter
        category = self.request.GET.get("category")
        if category and category != "all":
            queryset = queryset.filter(category=category)

        # Operating status filter
        if self.request.GET.get("operating") == "true":
            queryset = queryset.filter(status="operating")

        return queryset

    def get_template_names(self):
        """Return appropriate template based on request type"""
        if self.request.htmx:
            return ["rides/partials/ride_list_results.html"]
        return [self.template_name]

    def get_context_data(self, **kwargs):
        """Add park and category choices to context"""
        context = super().get_context_data(**kwargs)
        if hasattr(self, "park"):
            context["park"] = self.park
            context["park_slug"] = self.kwargs["park_slug"]
        context["category_choices"] = CATEGORY_CHOICES
        return context


class SingleCategoryListView(ListView):
    """View for displaying rides of a specific category"""

    model = Ride
    template_name = "rides/park_category_list.html"
    context_object_name = "rides"

    def get_queryset(self):
        """Get rides filtered by category and optionally by park"""
        category = self.kwargs.get("category")
        queryset = Ride.objects.filter(category=category).select_related(
            "park", "ride_model", "ride_model__manufacturer"
        )

        if "park_slug" in self.kwargs:
            self.park = get_object_or_404(Park, slug=self.kwargs["park_slug"])
            queryset = queryset.filter(park=self.park)

        return queryset

    def get_context_data(self, **kwargs):
        """Add park and category information to context"""
        context = super().get_context_data(**kwargs)
        if hasattr(self, "park"):
            context["park"] = self.park
            context["park_slug"] = self.kwargs["park_slug"]
        context["category"] = dict(CATEGORY_CHOICES).get(self.kwargs["category"])
        return context


# Alias for parks app to maintain backward compatibility
ParkSingleCategoryListView = SingleCategoryListView


def search_companies(request: HttpRequest) -> HttpResponse:
    """Search companies and return results for HTMX"""
    query = request.GET.get("q", "").strip()
    role = request.GET.get("role", "").upper()

    companies = Company.objects.all().order_by("name")
    if role:
        companies = companies.filter(roles__contains=[role])
    if query:
        companies = companies.filter(name__icontains=query)
    companies = companies[:10]

    return render(
        request,
        "rides/partials/company_search_results.html",
        {"companies": companies, "search_term": query},
    )


def search_ride_models(request: HttpRequest) -> HttpResponse:
    """Search ride models and return results for HTMX"""
    query = request.GET.get("q", "").strip()
    manufacturer_id = request.GET.get("manufacturer")

    # Show all ride models on click, filter on input
    ride_models = RideModel.objects.select_related("manufacturer").order_by("name")
    if query:
        ride_models = ride_models.filter(name__icontains=query)
    if manufacturer_id:
        ride_models = ride_models.filter(manufacturer_id=manufacturer_id)
    ride_models = ride_models[:10]

    return render(
        request,
        "rides/partials/ride_model_search_results.html",
        {
            "ride_models": ride_models,
            "search_term": query,
            "manufacturer_id": manufacturer_id,
        },
    )


def get_search_suggestions(request: HttpRequest) -> HttpResponse:
    """Get smart search suggestions for rides

    Returns suggestions including:
    - Common matching ride names
    - Matching parks
    - Matching categories
    """
    query = request.GET.get("q", "").strip().lower()
    suggestions = []

    if query:
        # Get common ride names
        matching_names = (
            Ride.objects.filter(name__icontains=query)
            .values("name")
            .annotate(count=Count("id"))
            .order_by("-count")[:3]
        )

        for match in matching_names:
            suggestions.append(
                {
                    "type": "ride",
                    "text": match["name"],
                    "count": match["count"],
                }
            )

        # Get matching parks
        matching_parks = Park.objects.filter(
            Q(name__icontains=query) | Q(location__city__icontains=query)
        )[:3]

        for park in matching_parks:
            suggestions.append(
                {
                    "type": "park",
                    "text": park.name,
                    "location": park.location.city if park.location else None,
                }
            )

        # Add category matches
        for code, name in CATEGORY_CHOICES:
            if query in name.lower():
                ride_count = Ride.objects.filter(category=code).count()
                suggestions.append(
                    {
                        "type": "category",
                        "code": code,
                        "text": name,
                        "count": ride_count,
                    }
                )

    return render(
        request,
        "rides/partials/search_suggestions.html",
        {"suggestions": suggestions, "query": query},
    )


class RideSearchView(ListView):
    """View for ride search functionality with HTMX support."""

    model = Ride
    template_name = "search/partials/ride_search_results.html"
    context_object_name = "rides"
    paginate_by = 20

    def get_queryset(self):
        """Get filtered rides based on search form."""
        queryset = Ride.objects.select_related("park").order_by("name")

        # Process search form
        form = RideSearchForm(self.request.GET)
        if form.is_valid():
            ride = form.cleaned_data.get("ride")
            if ride:
                # If specific ride selected, return just that ride
                queryset = queryset.filter(id=ride.id)
            else:
                # If no specific ride, filter by search term
                search_term = self.request.GET.get("ride", "").strip()
                if search_term:
                    queryset = queryset.filter(name__icontains=search_term)

        return queryset

    def get_template_names(self):
        """Return appropriate template based on request type."""
        if self.request.htmx:
            return ["search/partials/ride_search_results.html"]
        return ["search/ride_search.html"]

    def get_context_data(self, **kwargs):
        """Add search form to context."""
        context = super().get_context_data(**kwargs)
        context["search_form"] = RideSearchForm(self.request.GET)
        return context