<?php

declare(strict_types=1);

namespace App\Http\Controllers\Api\V1;

use App\Http\Controllers\Controller;
use App\Http\Requests\Api\V1\ReorderFestivalSectionsRequest;
use App\Http\Requests\Api\V1\StoreFestivalSectionRequest;
use App\Http\Requests\Api\V1\UpdateFestivalSectionRequest;
use App\Http\Resources\Api\V1\FestivalSectionResource;
use App\Models\Event;
use App\Models\FestivalSection;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Resources\Json\AnonymousResourceCollection;
use Illuminate\Support\Facades\Gate;

final class FestivalSectionController extends Controller
{
    public function index(Event $event): AnonymousResourceCollection
    {
        Gate::authorize('viewAny', [FestivalSection::class, $event]);

        $sections = $event->festivalSections()->ordered()->get();

        // For sub-events, also include cross_event sections from the parent festival
        if ($event->isSubEvent()) {
            $parentCrossEventSections = $event->parent
                ->festivalSections()
                ->where('type', 'cross_event')
                ->ordered()
                ->get();

            $sections = $parentCrossEventSections->merge($sections)->sortBy('sort_order')->values();
        }

        return FestivalSectionResource::collection($sections);
    }

    public function store(StoreFestivalSectionRequest $request, Event $event): JsonResponse
    {
        Gate::authorize('create', [FestivalSection::class, $event]);

        $data = $request->validated();
        $redirectedToParent = false;

        if (($data['type'] ?? 'standard') === 'cross_event') {
            if ($event->isFlatEvent()) {
                return $this->error(
                    'Overkoepelende secties kunnen alleen worden aangemaakt bij festivals met programmaonderdelen.',
                    422,
                );
            }

            if ($event->isSubEvent()) {
                $event = $event->parent;
                Gate::authorize('create', [FestivalSection::class, $event]);
                $redirectedToParent = true;
            }
        }

        $section = $event->festivalSections()->create($data);

        $response = $this->created(new FestivalSectionResource($section));

        if ($redirectedToParent) {
            $original = $response->getData(true);
            $original['meta'] = [
                'redirected_to_parent' => true,
                'parent_event_name' => $event->name,
            ];

            return response()->json($original, 201);
        }

        return $response;
    }

    public function update(UpdateFestivalSectionRequest $request, Event $event, FestivalSection $section): JsonResponse
    {
        Gate::authorize('update', [$section, $event]);

        $section->update($request->validated());

        return $this->success(new FestivalSectionResource($section->fresh()));
    }

    public function destroy(Event $event, FestivalSection $section): JsonResponse
    {
        Gate::authorize('delete', [$section, $event]);

        $section->delete();

        return response()->json(null, 204);
    }

    public function reorder(ReorderFestivalSectionsRequest $request, Event $event): JsonResponse
    {
        Gate::authorize('reorder', [FestivalSection::class, $event]);

        foreach ($request->validated('sections') as $index => $id) {
            $event->festivalSections()
                ->where('id', $id)
                ->update(['sort_order' => $index]);
        }

        $sections = $event->festivalSections()->ordered()->get();

        return $this->success(FestivalSectionResource::collection($sections));
    }
}