<?php

declare(strict_types=1);

namespace App\Http\Controllers;

use App\Http\Requests\SubscribePublicPageRequest;
use App\Models\PageBlock;
use App\Models\PreregistrationPage;
use App\Services\RegisterSubscriberOnPage;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Collection;
use Illuminate\View\View;

class PublicPageController extends Controller
{
    public function __construct(
        private readonly RegisterSubscriberOnPage $registerSubscriberOnPage
    ) {}

    public function show(PreregistrationPage $publicPage): View
    {
        $publicPage->load(['blocks' => fn ($q) => $q->orderBy('sort_order')]);

        $pageState = $this->resolvePageState($publicPage);
        $blocksToRender = $this->filterBlocksForPageState($publicPage, $pageState);
        $subscriberCount = $publicPage->subscribers()->count();

        $title = $publicPage->headlineForMeta();

        return view('public.page', [
            'page' => $publicPage,
            'pageState' => $pageState,
            'blocksToRender' => $blocksToRender,
            'subscriberCount' => $subscriberCount,
            'title' => $title,
        ]);
    }

    public function subscribe(SubscribePublicPageRequest $request, PreregistrationPage $publicPage): JsonResponse
    {
        abort_if(now()->lt($publicPage->start_date) || now()->gt($publicPage->end_date), 403);

        $validated = $request->validated();

        $exists = $publicPage->subscribers()
            ->where('email', $validated['email'])
            ->exists();

        if ($exists) {
            return response()->json([
                'success' => false,
                'message' => __('You are already registered for this event.'),
            ], 422);
        }

        $this->registerSubscriberOnPage->storeAndQueueIntegrations($publicPage, $validated);

        return response()->json([
            'success' => true,
            'message' => $publicPage->thank_you_message ?? __('Thank you for registering!'),
        ]);
    }

    private function resolvePageState(PreregistrationPage $page): string
    {
        if ($page->isBeforeStart()) {
            return 'countdown';
        }

        if ($page->isExpired()) {
            return 'expired';
        }

        return 'active';
    }

    /**
     * @return Collection<int, PageBlock>
     */
    private function filterBlocksForPageState(PreregistrationPage $page, string $pageState): Collection
    {
        return $page->visibleBlocks()
            ->orderBy('sort_order')
            ->get()
            ->filter(function (PageBlock $block) use ($pageState): bool {
                return match ($pageState) {
                    'countdown' => in_array($block->type, ['hero', 'countdown', 'image'], true),
                    'expired' => in_array($block->type, ['hero', 'image', 'cta_banner'], true),
                    default => true,
                };
            })
            ->values();
    }
}