<?php

namespace App\Support;

use App\Models\Venue;
use App\Models\VerifyPortalCredential;
use Illuminate\Support\Facades\Crypt;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Hash;

/** 抢票核销：场馆维度 6 位口令（与活动共用同一核销入口页）；凭证 kind = ticket_grab_venue */
final class VenueVerifyPortalPin
{
    public const CRED_USERNAME = '__tg_pin__';

    public static function syncPinCredential(Venue $venue): VerifyPortalCredential
    {
        $pin = trim((string) ($venue->verify_portal_pin ?? ''));
        if ($pin === '' || ! preg_match('/^\d{6}$/', $pin)) {
            throw new \InvalidArgumentException('场馆抢票核销口令无效');
        }

        $vid = (int) $venue->id;

        /** @var VerifyPortalCredential|null $cred */
        $cred = VerifyPortalCredential::query()
            ->where('portal_kind', VerifyPortalCredential::KIND_TICKET_GRAB_VENUE)
            ->where('portal_id', $vid)
            ->where('username', self::CRED_USERNAME)
            ->first();

        $attributes = [
            'venue_id' => $vid,
            'password' => Hash::make($pin),
            'password_plain_enc' => Crypt::encryptString($pin),
            'note' => null,
        ];

        if ($cred !== null) {
            $cred->forceFill($attributes)->save();

            return $cred;
        }

        return VerifyPortalCredential::query()->create(array_merge([
            'portal_kind' => VerifyPortalCredential::KIND_TICKET_GRAB_VENUE,
            'portal_id' => $vid,
            'username' => self::CRED_USERNAME,
        ], $attributes));
    }

    public static function ensure(Venue $venue): string
    {
        $venue->refresh();

        $pinOut = trim((string) ($venue->verify_portal_pin ?? ''));
        if ($pinOut !== '' && preg_match('/^\d{6}$/', $pinOut)) {
            self::syncPinCredential($venue);

            return $pinOut;
        }

        DB::transaction(function () use ($venue): void {
            $fresh = Venue::query()->whereKey($venue->id)->lockForUpdate()->first();
            if ($fresh === null) {
                return;
            }
            $p = trim((string) ($fresh->verify_portal_pin ?? ''));
            if ($p !== '' && preg_match('/^\d{6}$/', $p)) {
                return;
            }
            $fresh->forceFill(['verify_portal_pin' => PortalSixDigitPin::generateUnique()])->saveQuietly();
        });

        $venue->refresh();
        $pinOut = trim((string) ($venue->verify_portal_pin ?? ''));
        self::syncPinCredential($venue);

        return $pinOut;
    }
}