<?php

namespace App\Livewire\Admin;

use App\Models\Share;
use App\Models\ShareFile;
use App\Services\ShareService;
use Livewire\Attributes\Layout;
use Livewire\Component;
use Livewire\WithPagination;

#[Layout('layouts.app')]
class AdminDashboard extends Component
{
    use WithPagination;

    /**
     * The orders the shares list offers, each a column and a direction.
     *
     * @var array<string, array{0: string, 1: string}>
     */
    public const SORTS = [
        'newest' => ['created_at', 'desc'],
        'oldest' => ['created_at', 'asc'],
        'expiring' => ['expires_at', 'asc'],
        'largest' => ['total_size', 'desc'],
        'most-downloaded' => ['download_count', 'desc'],
        'most-files' => ['files_count', 'desc'],
    ];

    public string $sort = 'newest';

    /** The share the delete dialog is asking about, while it is open. */
    public ?int $deletingShareId = null;

    public function deleteShare(int $shareId, ShareService $shareService): void
    {
        $share = Share::query()->findOrFail($shareId);
        $shareService->deleteShare($share);

        $this->deletingShareId = null;
    }

    /**
     * A new order starts again from the first page.
     */
    public function updatedSort(): void
    {
        $this->resetPage();
    }

    public function render(): mixed
    {
        $shareService = app(ShareService::class);

        // The sort comes from the browser: only a known order reaches the query.
        [$column, $direction] = self::SORTS[$this->sort] ?? self::SORTS['newest'];

        // Shares whose files are still being uploaded are not shares yet; their bytes do count as used space.
        $shares = Share::query()
            ->whereNotNull('completed_at')
            ->withCount('files')
            // Shares that never expire come after every share that does, whichever way expiry is sorted.
            ->when($column === 'expires_at', fn ($query) => $query->orderByRaw('expires_at is null'))
            ->orderBy($column, $direction)
            ->orderByDesc('id')
            ->paginate(15);

        return view('livewire.admin.admin-dashboard', [
            'shares' => $shares,
            'totalShares' => Share::query()->whereNotNull('completed_at')->count(),
            'activeShares' => Share::query()->whereNotNull('completed_at')->where(function ($q) {
                $q->whereNull('expires_at')->orWhere('expires_at', '>', now());
            })->count(),
            'totalFiles' => ShareFile::query()->whereHas('share', fn ($query) => $query->whereNotNull('completed_at'))->count(),
            'usedSpace' => $shareService->getTotalUsedSpace(),
            'maxQuota' => $shareService->getMaxStorageQuota(),
        ]);
    }
}