flnxi-Wu/license-server/app/api/license/[projectCode]/register-free/route.ts

import { NextRequest, NextResponse } from 'next/server';
import { getPublicProjectDb } from '@/lib/project-auth';
import { hashFingerprint, signLicense } from '@/lib/crypto';
import { verifyLicenseRequestSignature } from '@/lib/request-signature';
import { LICENSE_CONFIGS } from '@/lib/types';
import { createPendingAlertOnce, findFreeFingerprintReuse } from '@/lib/abuse-detection';
import { buildLicenseSigningPayload } from '@/lib/license-payload';
import { z } from 'zod';

const registerFreeSchema = z.object({
  fingerprint: z.object({
    machineId: z.string({ required_error: '系统信息不完整：machineId 缺失' }),
    hostname: z.string({ required_error: '系统信息不完整：hostname 缺失' }),
    macAddress: z.string({ required_error: '系统信息不完整：macAddress 缺失' }),
    cpuId: z.string().optional(),
    instanceId: z.string({ required_error: '系统信息不完整：instanceId 缺失' }),
  }),
  customerName: z.string().min(1, '客户名称不能为空'),
  contactInfo: z.string().min(1, '联系方式不能为空'),
  timestamp: z.number({ required_error: '请求时间戳缺失' }),
});

function generateFreeActivationCode(): string {
  const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
  const segments: string[] = [];

  for (let i = 0; i < 4; i++) {
    let segment = '';
    for (let j = 0; j < 4; j++) {
      segment += chars.charAt(Math.floor(Math.random() * chars.length));
    }
    segments.push(segment);
  }

  return `FLNXI-FREE-${segments.join('-')}`;
}

export async function POST(
  request: NextRequest,
  { params }: { params: Promise<{ projectCode: string }> }
) {
  try {
    const { projectCode } = await params;
    const projectDbResult = await getPublicProjectDb(projectCode);

    if (!projectDbResult.success) {
      return projectDbResult.response;
    }

    const body = await request.json().catch(() => ({}));
    const signatureResult = verifyLicenseRequestSignature('register-free', projectCode, body);
    if (!signatureResult.valid) {
      return NextResponse.json(
        { success: false, error: '请求签名无效' },
        { status: signatureResult.response.status }
      );
    }

    const parsed = registerFreeSchema.safeParse(body);

    if (!parsed.success) {
      const firstError = parsed.error.errors[0]?.message || '参数验证失败';
      return NextResponse.json(
        { success: false, error: firstError },
        { status: 400 }
      );
    }

    const { fingerprint, customerName, contactInfo, timestamp } = parsed.data;
    const now = Date.now();

    if (Math.abs(now - timestamp) > 5 * 60 * 1000) {
      return NextResponse.json(
        { success: false, error: '请求已过期' },
        { status: 400 }
      );
    }

    const existingActivation = await projectDbResult.prisma.activation.findFirst({
      where: {
        instanceId: fingerprint.instanceId,
        isActive: true,
      },
      include: {
        license: true,
      },
    });

    if (existingActivation) {
      if (existingActivation.license.status === 'disabled') {
        return NextResponse.json(
          { success: false, error: '许可证已被禁用' },
          { status: 403 }
        );
      }

      if (
        existingActivation.license.status === 'expired' ||
        (existingActivation.license.expiresAt && existingActivation.license.expiresAt < new Date())
      ) {
        return NextResponse.json(
          { success: false, error: '许可证已过期' },
          { status: 403 }
        );
      }

      const signedLicense = signLicense(buildLicenseSigningPayload({
        projectCode,
        licenseKey: existingActivation.license.licenseKey,
        licenseType: existingActivation.license.licenseType,
        expiresAt: existingActivation.license.expiresAt,
        fingerprint,
        activationId: existingActivation.id,
      }));

      return NextResponse.json({
        success: true,
        license: signedLicense,
        data: {
          activationCode: existingActivation.license.licenseKey,
          plan: existingActivation.license.licenseType,
          planName:
            existingActivation.license.licenseType === 'FREE'
              ? '免费版'
              : existingActivation.license.licenseType === 'STANDARD'
                ? '标准版'
                : '专业版',
          isExisting: true,
        },
      });
    }

    const reuseResult = await findFreeFingerprintReuse(projectDbResult.prisma, fingerprint);
    if (reuseResult.reused) {
      const relatedLicense = await projectDbResult.prisma.license.findUnique({
        where: { licenseKey: reuseResult.existingLicenseKey },
        select: { id: true },
      });

      if (relatedLicense) {
        await createPendingAlertOnce(projectDbResult.prisma, relatedLicense.id, 'free_reactivation_blocked', {
          requestedInstanceId: fingerprint.instanceId,
          existingInstanceId: reuseResult.existingInstanceId,
          existingLicenseKey: reuseResult.existingLicenseKey,
          matchScore: reuseResult.matchScore,
        });
      }

      return NextResponse.json(
        {
          success: false,
          error: '该设备已注册过免费版，请继续使用原免费许可证或升级付费版',
        },
        { status: 409 }
      );
    }

    const activationCode = generateFreeActivationCode();
    let createdActivationId = '';
    const clientIP =
      request.headers.get('x-forwarded-for')?.split(',')[0]?.trim() ||
      request.headers.get('x-real-ip') ||
      'unknown';

    await projectDbResult.prisma.$transaction(async (tx) => {
      const license = await tx.license.create({
        data: {
          licenseKey: activationCode,
          licenseType: 'FREE',
          customerName,
          contactInfo,
          maxUsers: LICENSE_CONFIGS.FREE.limits.maxUsers,
          maxMaterials: LICENSE_CONFIGS.FREE.limits.maxMaterials,
          features: LICENSE_CONFIGS.FREE.features,
          expiresAt: null,
        },
      });

      const activation = await tx.activation.create({
        data: {
          licenseId: license.id,
          instanceId: fingerprint.instanceId,
          fingerprint: fingerprint as object,
          lastHeartbeat: new Date(),
        },
      });
      createdActivationId = activation.id;

      await tx.heartbeatLog.create({
        data: {
          licenseId: license.id,
          instanceId: fingerprint.instanceId,
          fingerprintHash: hashFingerprint(fingerprint),
          ipAddress: clientIP,
        },
      });
    });

    const signedLicense = signLicense(buildLicenseSigningPayload({
      projectCode,
      licenseKey: activationCode,
      licenseType: 'FREE',
      expiresAt: null,
      fingerprint,
      activationId: createdActivationId,
    }));

    return NextResponse.json({
      success: true,
      license: signedLicense,
      data: {
        activationCode,
        plan: 'FREE',
        planName: '免费版',
        isExisting: false,
      },
    });
  } catch (error) {
    console.error('项目免费版注册失败:', error);
    return NextResponse.json(
      { success: false, error: '服务器内部错误' },
      { status: 500 }
    );
  }
}