<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\Activity;
use App\Models\TicketGrabEvent;
use App\Models\Venue;
use App\Models\VerifyPortalCredential;
use App\Support\ActivityVerifyPortalPin;
use App\Support\VenueVerifyPortalPin;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Hash;

class VerifyPortalAuthController extends Controller
{
    /**
     * 历史抢票短链 ?v= 入口已废弃；统一使用与活动相同的核销页 + 6 位口令。
     */
    public function portalPreview(Request $request): JsonResponse
    {
        return response()->json(['message' => '请使用平台统一核销入口'], 404);
    }

    public function login(Request $request): JsonResponse
    {
        $data = $request->validate([
            'portal_code' => ['nullable', 'string', 'max:16'],
            'portal_token' => ['nullable', 'string', 'max:64'],
            'username' => ['nullable', 'string', 'max:64'],
            'password' => ['required', 'string', 'max:72'],
        ]);

        $password = (string) ($data['password'] ?? '');
        $passwordTrim = trim($password);
        $usernameInput = trim((string) ($data['username'] ?? ''));

        if (preg_match('/^\d{6}$/', $passwordTrim)) {
            if ($usernameInput !== '') {
                return response()->json(['message' => '核销只需输入 6 位数字口令，无需用户名'], 422);
            }

            /** @var Activity|null $activity */
            $activity = Activity::query()->where('verify_portal_pin', $passwordTrim)->first();
            if ($activity !== null) {
                $cred = ActivityVerifyPortalPin::syncPinCredential($activity);
                if (! Hash::check($passwordTrim, $cred->password)) {
                    $cred = ActivityVerifyPortalPin::syncPinCredential($activity->fresh());
                    if (! Hash::check($passwordTrim, $cred->password)) {
                        return response()->json(['message' => '系统繁忙，请稍后再试'], 500);
                    }
                }

                if (! $cred->portalAcceptsVerification()) {
                    return response()->json(['message' => '活动已结束，无法登录核销'], 422);
                }

                $expiresAt = now()->addMonths(6);
                /** 活动核销允许多人并行在线 */
                $plain = $cred->createToken('verify-portal', ['verify-portal'], $expiresAt)->plainTextToken;

                return response()->json([
                    'token' => $plain,
                    'auth_mode' => 'verify_portal',
                    'portal_kind' => VerifyPortalCredential::KIND_ACTIVITY,
                    'portal_id' => (int) $activity->id,
                ]);
            }

            /** @var Venue|null $venue */
            $venue = Venue::query()->where('verify_portal_pin', $passwordTrim)->first();
            if ($venue !== null) {
                $cred = VenueVerifyPortalPin::syncPinCredential($venue);
                if (! Hash::check($passwordTrim, $cred->password)) {
                    $cred = VenueVerifyPortalPin::syncPinCredential($venue->fresh());
                    if (! Hash::check($passwordTrim, $cred->password)) {
                        return response()->json(['message' => '系统繁忙，请稍后再试'], 500);
                    }
                }

                if (! $cred->portalAcceptsVerification()) {
                    return response()->json(['message' => '该场馆核销入口不可用（未启用或未通过审核），无法登录核销'], 422);
                }

                $expiresAt = now()->addMonths(6);
                /** 与活动一致：不因新登录吊销旧 token */
                $plain = $cred->createToken('verify-portal', ['verify-portal'], $expiresAt)->plainTextToken;

                return response()->json([
                    'token' => $plain,
                    'auth_mode' => 'verify_portal',
                    'portal_kind' => VerifyPortalCredential::KIND_TICKET_GRAB_VENUE,
                    'portal_id' => (int) $venue->id,
                ]);
            }

            return response()->json(['message' => '密码错误'], 422);
        }

        return response()->json([
            'message' => '请使用后台账号用户名与密码登录，或直接输入 6 位数字核销口令（活动或抢票场馆口令）。',
        ], 422);
    }

    public function me(Request $request): JsonResponse
    {
        $cred = $request->user();
        if (! $cred instanceof VerifyPortalCredential) {
            return response()->json(['message' => '非核销门户登录态'], 403);
        }

        if (! $cred->portalAcceptsVerification()) {
            $cred->tokens()->delete();

            return response()->json(['message' => '核销已失效'], 403);
        }

        $cred->load('venue:id,name');
        $title = '';
        if ($cred->portal_kind === VerifyPortalCredential::KIND_ACTIVITY) {
            $title = (string) Activity::query()->where('id', $cred->portal_id)->value('title');
        } elseif ($cred->portal_kind === VerifyPortalCredential::KIND_TICKET_GRAB_VENUE) {
            $title = '抢票 · '.(string) ($cred->venue?->name ?? '');
        } else {
            $title = (string) TicketGrabEvent::query()->where('id', $cred->portal_id)->value('title');
        }

        $hidePinUser = \in_array(
            (string) $cred->username,
            [ActivityVerifyPortalPin::CRED_USERNAME, VenueVerifyPortalPin::CRED_USERNAME],
            true,
        );

        return response()->json([
            'auth_mode' => 'verify_portal',
            'portal_kind' => $cred->portal_kind,
            'portal_id' => $cred->portal_id,
            'username' => $hidePinUser ? null : $cred->username,
            'venue' => $cred->venue ? ['id' => $cred->venue->id, 'name' => $cred->venue->name] : null,
            'event_title' => $title,
        ]);
    }
}