<?php

namespace App\Http\Controllers;

use App\Models\User;
use App\Services\WorkflowNotices;
use Illuminate\Http\Request;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;
use Inertia\Inertia;
use Symfony\Component\HttpFoundation\Response;

class WorkflowNoticeController extends Controller
{
    public function index(Request $request, WorkflowNotices $notices): Response
    {
        return DB::transaction(function () use ($request, $notices) {
            if (DB::getDriverName() === 'pgsql' && DB::transactionLevel() === 1) {
                DB::statement('SET TRANSACTION ISOLATION LEVEL REPEATABLE READ READ ONLY');
            }

            return $this->page($request, $notices);
        });
    }

    /** @return array<string,mixed> */
    private function filters(Request $request): array
    {
        return $request->validate(['view' => 'nullable|in:all,unread,tasks,outcomes', 'page' => 'nullable|integer|min:1|max:100000', 'search' => 'nullable|string|max:100']);
    }

    private function page(Request $request, WorkflowNotices $notices): Response
    {
        $actor = $request->user('web');
        abort_unless($actor instanceof User, 403);
        $filter = $this->filters($request);
        $visible = collect($notices->visible($actor));
        $unread = $visible->whereNull('read_at')->count();
        $items = ($filter['view'] ?? 'all') === 'unread' ? $visible->whereNull('read_at')->values() : $visible;
        if (in_array($filter['view'] ?? '', ['tasks', 'outcomes'], true)) {
            $items = $visible->where('kind', $filter['view'] === 'tasks' ? 'task' : 'outcome')->values();
        }
        $search = trim($filter['search'] ?? '');
        if ($search !== '') {
            $items = $items->filter(fn ($notice) => mb_stripos($notice['reference'], $search) !== false)->values();
        }
        $page = min((int) ($filter['page'] ?? 1), max(1, (int) ceil($items->count() / 25)));
        Inertia::encryptHistory();
        $response = Inertia::render('workflow/notices', ['ready' => Schema::hasTable('workflow_notices'), 'unread' => $unread, 'view' => $filter['view'] ?? 'all',
            'search' => $search,
            'notices' => (new LengthAwarePaginator($items->slice(($page - 1) * 25, 25)->values(), $items->count(), 25, $page, ['path' => $request->url()]))->withQueryString()])->toResponse($request);
        $response->headers->set('Cache-Control', 'private, no-store, max-age=0');

        return $response;
    }

    public function read(Request $request, int $notice, WorkflowNotices $notices): Response
    {
        $actor = $request->user('web');
        abort_unless($actor instanceof User, 403);
        $filters = $this->filters($request);
        $notices->read($actor, $notice);

        return redirect('/requisicoes/avisos'.($filters === [] ? '' : '?'.http_build_query($filters)));
    }

    public function refresh(Request $request, int $requisition, WorkflowNotices $notices): Response
    {
        $actor = $request->user('web');
        abort_unless($actor instanceof User, 403);
        $notices->refresh($actor, $requisition, $request->all());

        return redirect('/requisicoes/'.$requisition);
    }
}