<?php

declare(strict_types=1);

namespace App\Http\Controllers\Api\V1;

use App\Http\Controllers\Controller;
use App\Models\Setting;
use App\Support\Maintenance;
use Carbon\CarbonImmutable;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

/**
 * The public site's maintenance mode — the panel's maintenance screen, as two
 * calls. Only the public site goes down; the panel and this API keep working.
 */
class MaintenanceController extends Controller
{
    public function show(): JsonResponse
    {
        $this->authorize('settings.view');

        return $this->state();
    }

    /**
     * `enabled` switches it; `message` (language → text) and `until` are kept
     * either way, so the wording can be prepared before the site goes down.
     */
    public function update(Request $request): JsonResponse
    {
        $this->authorize('settings.maintenance');

        $data = $request->validate([
            'enabled' => ['required', 'boolean'],
            'message' => ['sometimes', 'nullable', 'array'],
            'message.*' => ['nullable', 'string', 'max:500'],
            'until' => ['sometimes', 'nullable', 'date', 'after:now'],
        ]);

        $message = array_key_exists('message', $data)
            ? array_filter((array) $data['message'], fn ($text) => filled($text))
            : Maintenance::messages();

        if ($data['enabled']) {
            Maintenance::enable(
                message: $message,
                until: filled($data['until'] ?? null) ? CarbonImmutable::parse($data['until']) : null,
            );
        } else {
            // Switching it off must not take the prepared wording with it.
            Setting::set(Maintenance::KEY, [...Maintenance::state(), 'enabled' => false, 'until' => null, 'message' => $message]);
        }

        return $this->state();
    }

    protected function state(): JsonResponse
    {
        return response()->json(['data' => [
            'enabled' => Maintenance::isEnabled(),
            'message' => (object) Maintenance::messages(),
            'until' => Maintenance::until()?->toIso8601String(),
            'started_at' => Maintenance::startedAt()?->toIso8601String(),
        ]]);
    }
}