<?php

use App\Enums\Portal;
use App\Enums\PressReleaseStatus;
use App\Models\PressRelease;
use App\Support\EditorialClock;
use App\Support\WebPageCache;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\Pagination\Paginator;
use Illuminate\Support\Carbon;
use Livewire\Attributes\Locked;
use Livewire\Component;
use Livewire\WithPagination;

new class extends Component
{
    use WithPagination;

    private const TIMEFRAMES = ['all', 'today', 'week'];

    /** Nur die vorderen Seiten cachen (Schutz vor unbegrenztem Key-Raum). */
    private const CACHED_PAGES = 3;

    public string $timeframe = 'all';

    #[Locked]
    public ?string $portal = null;

    #[Locked]
    public string $language = 'de';

    protected array $queryString = [
        'timeframe' => ['except' => 'all'],
    ];

    public function setTimeframe(string $timeframe): void
    {
        $this->timeframe = $timeframe;
        $this->resetPage();
    }

    public function with(): array
    {
        $releases = $this->pressReleases();

        return [
            'releases' => $releases,
            'totalCount' => $releases->total(),
        ];
    }

    /**
     * Der Feed rendert auf jeder Startseiten-Impression → die vorderen Seiten
     * werden stale-while-revalidate gecacht (WebPageCache, wie die übrigen
     * Seitendaten). Der Paginator wird pro Request neu gebaut, damit die
     * Pagination-Links den Host des aktuellen Requests tragen und nicht den
     * des Cache-Erzeugers.
     */
    private function pressReleases(): LengthAwarePaginator
    {
        $page = max(1, (int) Paginator::resolveCurrentPage('page'));
        $timeframe = $this->normalizedTimeframe();

        $build = fn (): array => $this->feedPayload($timeframe, $page);

        $payload = $page <= self::CACHED_PAGES
            ? WebPageCache::remember(
                WebPageCache::key('feed', [$this->portalValues()[0], $this->language, $timeframe, 'page', $page]),
                $build,
            )
            : $build();

        return new LengthAwarePaginator(
            $payload['items'],
            $payload['total'],
            8,
            $page,
            ['path' => Paginator::resolveCurrentPath(), 'pageName' => 'page'],
        );
    }

    /**
     * @return array{items: \Illuminate\Database\Eloquent\Collection<int, PressRelease>, total: int}
     */
    private function feedPayload(string $timeframe, int $page): array
    {
        $query = $this->baseQuery();

        if ($timeframe !== 'all') {
            $reference = $this->referenceNow();
            $query
                ->when($timeframe === 'today', fn (Builder $query) => $query->whereBetween('published_at', [$reference->copy()->startOfDay(), $reference->copy()->endOfDay()]))
                ->when($timeframe === 'week', fn (Builder $query) => $query->where('published_at', '>=', $reference->copy()->subDays(7)));
        }

        return [
            'items' => (clone $query)->orderByDesc('published_at')->forPage($page, 8)->get(),
            'total' => (clone $query)->count(),
        ];
    }

    /**
     * Der timeframe kommt aus der URL (queryString) — unbekannte Werte fallen
     * auf "all" zurück, damit sie weder Queries noch Cache-Keys erreichen.
     */
    private function normalizedTimeframe(): string
    {
        return in_array($this->timeframe, self::TIMEFRAMES, true) ? $this->timeframe : 'all';
    }

    private function referenceNow(): Carbon
    {
        return EditorialClock::reference($this->portalValues(), $this->language);
    }

    private function baseQuery(): Builder
    {
        return PressRelease::query()
            ->with([
                'company',
                'category.translations' => fn ($query) => $query->where('locale', $this->language),
                // Nur öffentlich auslieferbare Bilder (Audit 29.09., B-01).
                'images' => fn ($query) => $query
                    ->publiclyVisible()
                    ->orderByDesc('is_preview')
                    ->orderBy('sort_order')
                    ->limit(1),
            ])
            ->whereIn('portal', $this->portalValues())
            ->where('status', PressReleaseStatus::Published)
            ->where('language', $this->language)
            ->whereNotNull('published_at')
            ->where('published_at', '<=', now());
    }

    /**
     * @return array<int, string>
     */
    private function portalValues(): array
    {
        $primary = $this->portal ?? Portal::Businessportal24->value;

        return [$primary, Portal::Both->value];
    }
}; ?>

<div wire:loading.class="opacity-60">
    <header class="flex items-baseline justify-between mb-4 min-h-[34px] flex-wrap gap-3">
        <h2 class="font-serif text-[28px] font-semibold m-0 tracking-[-0.3px] leading-[1.2] text-ink">
            {{ __('web.feed.title') }}
        </h2>
        <div class="flex gap-[18px] text-[12.5px] text-ink-3">
            <button type="button" wire:click="setTimeframe('all')"
                class="cursor-pointer transition-colors @if ($timeframe === 'all') text-ink border-b-[1.5px] border-brand pb-0.5 @else hover:text-ink @endif">
                {{ __('web.feed.filter_all') }}
            </button>
            <button type="button" wire:click="setTimeframe('today')"
                class="cursor-pointer transition-colors @if ($timeframe === 'today') text-ink border-b-[1.5px] border-brand pb-0.5 @else hover:text-ink @endif">
                {{ __('web.feed.filter_today') }}
            </button>
            <button type="button" wire:click="setTimeframe('week')"
                class="cursor-pointer transition-colors @if ($timeframe === 'week') text-ink border-b-[1.5px] border-brand pb-0.5 @else hover:text-ink @endif">
                {{ __('web.feed.filter_week') }}
            </button>
        </div>
    </header>
    <hr class="rule-strong">

    @php
        $items = $releases->items();
        $top = $items[0] ?? null;
        $rest = array_slice($items, 1);
    @endphp

    @if ($top)
        <x-web.feed-top-item :release="$top" />
    @else
        <p class="py-8 text-[13.5px] text-ink-3 m-0">{{ __('web.feed.empty') }}</p>
    @endif

    @foreach ($rest as $release)
        <x-web.feed-item :release="$release" :recommended="($release->content_score ?? 0) >= 80" />

        @if ($loop->index === 2)
            {{-- Werbeplatz nach der dritten Feed-Meldung (Position der früheren feed-ad). --}}
            <x-web.ad-slot variant="feed" />
        @endif
    @endforeach

    @if ($releases->hasMorePages())
        <div class="flex justify-center mt-7">
            <a href="{{ $releases->nextPageUrl() }}"
                class="inline-flex items-center gap-2 px-[18px] py-2.5 text-[13px] font-semibold text-ink bg-transparent border border-bg-rule-strong rounded-[2px] cursor-pointer hover:bg-ink hover:text-bg transition-colors">
                {{ __('web.feed.more', ['count' => number_format(max(0, $totalCount - $releases->currentPage() * $releases->perPage()), 0, ',', '.')]) }} →
            </a>
        </div>
    @endif
</div>