<?php

use App\Enums\PressReleaseStatus;
use App\Models\PressRelease;
use App\Models\PressReleaseAttachment;
use App\Services\PressRelease\PressReleaseAttachmentStorage;
use Flux\Flux;
use Livewire\Attributes\Locked;
use Livewire\Volt\Component;
use Livewire\WithFileUploads;

/**
 * Reusable attachments manager for a single press release. Mirrors the API
 * of the press-release-images-manager: upload, edit metadata, reorder,
 * delete. Authorisation is delegated to the `update` ability on the
 * PressReleasePolicy so the component is safe for admins and customers.
 *
 * Storage uses the `public` disk with path obscurity (UUID prefix). Embargo
 * / unpublished-state guards live at the PressRelease level.
 */
new class extends Component
{
    use WithFileUploads;

    #[Locked]
    public int $pressReleaseId;

    public $newFile = null;

    public string $newTitle = '';

    public string $newDescription = '';

    public ?int $editingId = null;

    public string $editTitle = '';

    public string $editDescription = '';

    public function mount(int $pressReleaseId): void
    {
        $this->pressReleaseId = $pressReleaseId;
    }

    public function upload(PressReleaseAttachmentStorage $storage): void
    {
        $pressRelease = $this->getPressRelease();
        $this->authorize('update', $pressRelease);

        if (! $this->canChangeAttachments($pressRelease)) {
            $this->addError('newFile', __('Anhänge können nur bei Entwürfen oder abgelehnten PMs geändert werden.'));

            return;
        }

        $maxKb = (int) (PressReleaseAttachmentStorage::MAX_BYTES / 1024);
        $allowedExtensions = implode(',', PressReleaseAttachmentStorage::ALLOWED_EXTENSIONS);

        $this->validate([
            'newFile' => ['required', 'file', 'mimes:'.$allowedExtensions, 'max:'.$maxKb],
            'newTitle' => ['nullable', 'string', 'max:120'],
            'newDescription' => ['nullable', 'string', 'max:500'],
        ]);

        $stored = $storage->store($this->newFile, $pressRelease->id);

        $pressRelease->attachments()->create([
            'disk' => $stored['disk'],
            'path' => $stored['path'],
            'original_name' => $stored['original_name'],
            'mime' => $stored['mime'],
            'size' => $stored['size'],
            'title' => $this->newTitle ?: null,
            'description' => $this->newDescription ?: null,
            'sort_order' => ((int) $pressRelease->attachments()->max('sort_order')) + 1,
        ]);

        $this->reset(['newFile', 'newTitle', 'newDescription']);

        Flux::toast(text: __('Anhang hochgeladen.'), variant: 'success');
    }

    public function removeNewFile(): void
    {
        $this->reset('newFile');
        $this->resetErrorBag('newFile');
    }

    public function startEdit(int $attachmentId): void
    {
        $attachment = $this->getAttachment($attachmentId);

        if (! $attachment) {
            return;
        }

        $this->editingId = $attachment->id;
        $this->editTitle = $attachment->title ?? '';
        $this->editDescription = $attachment->description ?? '';
    }

    public function cancelEdit(): void
    {
        $this->reset(['editingId', 'editTitle', 'editDescription']);
    }

    public function updateAttachment(): void
    {
        $pressRelease = $this->getPressRelease();
        $this->authorize('update', $pressRelease);

        if (! $this->canChangeAttachments($pressRelease) || $this->editingId === null) {
            return;
        }

        $this->validate([
            'editTitle' => ['nullable', 'string', 'max:120'],
            'editDescription' => ['nullable', 'string', 'max:500'],
        ]);

        $attachment = $this->getAttachment($this->editingId);

        if (! $attachment) {
            return;
        }

        $attachment->update([
            'title' => trim($this->editTitle) ?: null,
            'description' => trim($this->editDescription) ?: null,
        ]);

        $this->cancelEdit();

        Flux::toast(text: __('Anhang aktualisiert.'), variant: 'success');
    }

    public function moveUp(int $attachmentId): void
    {
        $this->swapSortOrder($attachmentId, -1);
    }

    public function moveDown(int $attachmentId): void
    {
        $this->swapSortOrder($attachmentId, 1);
    }

    public function remove(int $attachmentId, PressReleaseAttachmentStorage $storage): void
    {
        $pressRelease = $this->getPressRelease();
        $this->authorize('update', $pressRelease);

        if (! $this->canChangeAttachments($pressRelease)) {
            return;
        }

        $attachment = $this->getAttachment($attachmentId);

        if (! $attachment) {
            return;
        }

        $storage->delete($attachment->disk, $attachment->path);
        $attachment->delete();

        Flux::toast(text: __('Anhang entfernt.'), variant: 'success');
    }

    public function with(): array
    {
        $pressRelease = $this->getPressRelease();

        return [
            'attachments' => $pressRelease->attachments()
                ->orderBy('sort_order')
                ->orderBy('id')
                ->get(),
            'canEdit' => auth()->user()?->can('update', $pressRelease) === true
                && $this->canChangeAttachments($pressRelease),
            'maxMb' => round(PressReleaseAttachmentStorage::MAX_BYTES / 1024 / 1024),
            'allowedExtensions' => PressReleaseAttachmentStorage::ALLOWED_EXTENSIONS,
        ];
    }

    private function swapSortOrder(int $attachmentId, int $direction): void
    {
        $pressRelease = $this->getPressRelease();
        $this->authorize('update', $pressRelease);

        if (! $this->canChangeAttachments($pressRelease)) {
            return;
        }

        $attachments = $pressRelease->attachments()->orderBy('sort_order')->orderBy('id')->get();
        $currentIndex = $attachments->search(fn (PressReleaseAttachment $att) => $att->id === $attachmentId);

        if ($currentIndex === false) {
            return;
        }

        $targetIndex = $currentIndex + $direction;

        if ($targetIndex < 0 || $targetIndex >= $attachments->count()) {
            return;
        }

        $current = $attachments[$currentIndex];
        $target = $attachments[$targetIndex];

        $currentSort = $current->sort_order;
        $current->update(['sort_order' => $target->sort_order]);
        $target->update(['sort_order' => $currentSort]);
    }

    private function getPressRelease(): PressRelease
    {
        return PressRelease::withoutGlobalScopes()
            ->findOrFail($this->pressReleaseId);
    }

    private function getAttachment(int $attachmentId): ?PressReleaseAttachment
    {
        return PressReleaseAttachment::query()
            ->where('press_release_id', $this->pressReleaseId)
            ->whereKey($attachmentId)
            ->first();
    }

    private function canChangeAttachments(PressRelease $pressRelease): bool
    {
        if (auth()->user()?->canAccessAdmin()) {
            return ! in_array($pressRelease->status, [PressReleaseStatus::Archived], true);
        }

        return in_array(
            $pressRelease->status,
            [PressReleaseStatus::Draft, PressReleaseStatus::Rejected],
            true,
        );
    }
}; ?>

<section class="panel">
    <div class="p-5">
        <div class="flex items-center justify-between mb-3 gap-4 flex-wrap">
            <span class="pr-form-label" style="margin-bottom:0;">
                {{ __('Anhänge / Downloads') }}
                <span class="text-[color:var(--color-ink-4)] font-normal" style="letter-spacing:0;text-transform:none;">
                    — {{ count($attachments) }}/10
                </span>
            </span>
            <div class="flex items-center gap-2">
                <span class="text-[10.5px] text-[color:var(--color-ink-4)]">
                    {{ strtoupper(implode(' · ', $allowedExtensions)) }} · max. {{ $maxMb }} MB
                </span>
            </div>
        </div>

        @if ($canEdit)
            <form wire:submit="upload"
                class="rounded-[5px] border border-dashed border-[color:var(--color-hub-soft-2)] bg-[color:var(--color-bg-elev)] p-4 space-y-3">
                <flux:file-upload
                    wire:model="newFile"
                    accept=".{{ implode(',.', $allowedExtensions) }}"
                >
                    <flux:file-upload.dropzone
                        :heading="__('Datei hierher ziehen oder klicken')"
                        :text="strtoupper(implode(' · ', $allowedExtensions)).' · max. '.$maxMb.' MB'"
                        with-progress
                        inline
                    />
                </flux:file-upload>
                <flux:error name="newFile" />

                @if ($newFile)
                    <flux:file-item
                        :heading="$newFile->getClientOriginalName()"
                        :size="$newFile->getSize()"
                    >
                        <x-slot name="actions">
                            <flux:file-item.remove wire:click="removeNewFile" :aria-label="__('Datei entfernen')" />
                        </x-slot>
                    </flux:file-item>
                @endif

                <div class="flex justify-end">
                    <flux:button type="submit" variant="primary" icon="arrow-up-tray" wire:loading.attr="disabled">
                        <span wire:loading.remove wire:target="upload,newFile">{{ __('Hochladen') }}</span>
                        <span wire:loading wire:target="upload,newFile">{{ __('Lädt…') }}</span>
                    </flux:button>
                </div>
                <div class="grid gap-3 sm:grid-cols-2">
                    <flux:field>
                        <flux:label>{{ __('Titel (optional)') }}</flux:label>
                        <flux:input wire:model="newTitle" placeholder="{{ __('z.B. Pressemappe Frühjahr 2026') }}" />
                        <flux:error name="newTitle" />
                    </flux:field>
                    <flux:field>
                        <flux:label>{{ __('Beschreibung (optional)') }}</flux:label>
                        <flux:input wire:model="newDescription" placeholder="{{ __('Kurze Beschreibung des Dokuments') }}" />
                        <flux:error name="newDescription" />
                    </flux:field>
                </div>
            </form>
        @endif

        @if ($attachments->isEmpty())
            <div class="mt-4 rounded-[5px] border border-dashed border-[color:var(--color-bg-rule)] bg-[color:var(--color-bg-elev)] p-6 text-center">
                <flux:icon name="document" class="mx-auto mb-2 size-8 text-[color:var(--color-ink-4)]" />
                <p class="text-[12.5px] text-[color:var(--color-ink-3)] m-0">
                    {{ __('Noch keine Anhänge — Pressemappen, Factsheets oder Bildmaterial-Pakete passen hier rein.') }}
                </p>
            </div>
        @else
            <div class="mt-4 grid gap-3 sm:grid-cols-2">
                @foreach ($attachments as $attachment)
                    <article class="rounded-[5px] border border-[color:var(--color-bg-rule)] bg-[color:var(--color-bg-card)] p-3"
                        wire:key="att-{{ $attachment->id }}">
                        @if ($editingId === $attachment->id && $canEdit)
                            {{-- Inline-Edit-Form --}}
                            <div class="space-y-2">
                                <flux:field>
                                    <flux:label>{{ __('Titel') }}</flux:label>
                                    <flux:input wire:model="editTitle" />
                                    <flux:error name="editTitle" />
                                </flux:field>
                                <flux:field>
                                    <flux:label>{{ __('Beschreibung') }}</flux:label>
                                    <flux:input wire:model="editDescription" />
                                    <flux:error name="editDescription" />
                                </flux:field>
                                <div class="flex justify-end gap-1 pt-1">
                                    <flux:button size="xs" variant="filled" wire:click="cancelEdit">{{ __('Abbrechen') }}</flux:button>
                                    <flux:button size="xs" variant="primary" icon="check" wire:click="updateAttachment">{{ __('Speichern') }}</flux:button>
                                </div>
                            </div>
                        @else
                            <div class="flex items-start gap-3">
                                <div class="flex-shrink-0 w-11 h-11 rounded-[4px] bg-[color:var(--color-hub-soft)] text-[color:var(--color-hub)] flex items-center justify-center">
                                    @php
                                        $ext = strtolower(pathinfo($attachment->original_name ?? '', PATHINFO_EXTENSION));
                                        $iconName = match (true) {
                                            $ext === 'pdf' => 'document-text',
                                            in_array($ext, ['doc', 'docx'], true) => 'document-text',
                                            in_array($ext, ['xls', 'xlsx'], true) => 'table-cells',
                                            in_array($ext, ['ppt', 'pptx'], true) => 'presentation-chart-bar',
                                            $ext === 'zip' => 'archive-box',
                                            default => 'document',
                                        };
                                    @endphp
                                    <flux:icon :name="$iconName" variant="mini" class="size-5" />
                                </div>
                                <div class="flex-1 min-w-0">
                                    <p class="text-[13px] font-semibold text-[color:var(--color-ink)] m-0 truncate"
                                       title="{{ $attachment->title ?? $attachment->original_name }}">
                                        {{ $attachment->title ?? $attachment->original_name }}
                                    </p>
                                    @if ($attachment->title)
                                        <p class="text-[11px] text-[color:var(--color-ink-4)] m-0 truncate"
                                           title="{{ $attachment->original_name }}">
                                            {{ $attachment->original_name }}
                                        </p>
                                    @endif
                                    @if ($attachment->description)
                                        <p class="text-[11.5px] text-[color:var(--color-ink-3)] mt-1 mb-0 line-clamp-2">
                                            {{ $attachment->description }}
                                        </p>
                                    @endif
                                    <p class="text-[10.5px] text-[color:var(--color-ink-4)] font-mono mt-1 mb-0">
                                        {{ strtoupper($ext ?: '?') }} ·
                                        @php
                                            $bytes = (int) $attachment->size;
                                            $sizeLabel = $bytes >= 1048576
                                                ? number_format($bytes / 1048576, 1, ',', '.').' MB'
                                                : number_format(max(1, (int) round($bytes / 1024)), 0, ',', '.').' KB';
                                        @endphp
                                        {{ $sizeLabel }}
                                    </p>
                                </div>
                            </div>

                            <div class="flex flex-wrap items-center gap-1 mt-3 pt-3 border-t border-[color:var(--color-bg-rule)]">
                                @if ($attachment->url())
                                    <flux:button size="xs" variant="filled" icon="arrow-down-tray"
                                        href="{{ $attachment->url() }}" target="_blank" rel="noopener">
                                        {{ __('Download') }}
                                    </flux:button>
                                @endif
                                @if ($canEdit)
                                    <flux:button size="xs" variant="filled" icon="pencil-square" wire:click="startEdit({{ $attachment->id }})" :title="__('Bearbeiten')" />
                                    <flux:button size="xs" variant="filled" icon="arrow-up" wire:click="moveUp({{ $attachment->id }})" :title="__('Hoch')" />
                                    <flux:button size="xs" variant="filled" icon="arrow-down" wire:click="moveDown({{ $attachment->id }})" :title="__('Runter')" />
                                    <span class="flex-1"></span>
                                    <flux:button size="xs" variant="filled" icon="trash" wire:click="remove({{ $attachment->id }})"
                                        wire:confirm="{{ __('Anhang wirklich entfernen?') }}" :title="__('Entfernen')" />
                                @endif
                            </div>
                        @endif
                    </article>
                @endforeach
            </div>
        @endif
    </div>
</section>