import { OpenApiRecovery } from './open-api.recovery';
import { HTTP_REQUEST_CONTEXT } from '../send-chain/send-chain.contracts';
import {
  BadRequestException,
  ConflictException,
  ForbiddenException,
  forwardRef,
  HttpException,
  Inject,
  Injectable,
  NotFoundException,
  OnModuleDestroy,
  OnModuleInit,
  Optional,
  UnprocessableEntityException,
} from '@nestjs/common';
import { Prisma } from '@prisma/client';
import { Queue, Worker } from 'bullmq';
import { createHmac, randomBytes, randomUUID } from 'node:crypto';
import { lookup } from 'node:dns/promises';
import { isIP } from 'node:net';
import { request as httpRequest } from 'node:http';
import { request as httpsRequest } from 'node:https';
import { PrismaService } from '../prisma/prisma.service';
import { SendChainService } from '../send-chain/send-chain.service';
import { decryptSecret, encryptSecret } from './open-api.crypto';
import type { OpenApiAuthContext } from './open-api.types';
import { ProtocolLogsService } from '../protocol-logs/protocol-logs.service';
import { parseOpenApiDate, pinnedWebhookLookup, publicOpenApiFailure, webhookJobId } from './open-api.protocol';
import { automaticDeliveryMode } from './delivery-mode';

export const OPEN_API_WEBHOOK_TRANSPORT = Symbol('open-api-webhook-transport');
export type OpenApiWebhookTransport = (
  url: string,
  body: string,
  headers: Record<string, string>,
  timeoutMs: number,
  requireHttps: boolean,
) => Promise<{ status: number; body: string }>;

const WEBHOOK_QUEUE = 'http-webhook-delivery';
const RETRY_DELAYS_SECONDS = [0, 60, 300, 900, 3600, 21600, 86400];

export type HttpConfigInput = {
  enabled?: boolean;
  sendEnabled?: boolean;
  messageQueryEnabled?: boolean;
  receiptWebhookEnabled?: boolean;
  uplinkWebhookEnabled?: boolean;
  uplinkQueryEnabled?: boolean;
  credentialSelfServiceEnabled?: boolean;
  qpsLimit?: number;
  timestampToleranceSeconds?: number;
  maxCredentialCount?: number;
  uplinkRetentionDays?: number;
  maxQueryRangeDays?: number;
  maxPageSize?: number;
  receiptDeliveryMode?: string;
  uplinkDeliveryMode?: string;
  webhookRetryEnabled?: boolean;
  webhookMaxAttempts?: number;
  webhookTimeoutSeconds?: number;
  requireHttps?: boolean;
  allowClientManualRetry?: boolean;
  allowClientTest?: boolean;
  ipAllowlist?: string[];
};

@Injectable()
export class OpenApiService implements OnModuleInit, OnModuleDestroy {
  private queue?: Queue<{ deliveryId: string }>;
  private worker?: Worker<{ deliveryId: string }>;
  private recovery?: OpenApiRecovery;
  private recoveryTimer?: ReturnType<typeof setInterval>;

  constructor(
    private readonly prisma: PrismaService,
    @Inject(forwardRef(() => SendChainService)) private readonly sendChain: SendChainService,
    @Optional() private readonly protocolLogs?: ProtocolLogsService,
    @Optional() @Inject(OPEN_API_WEBHOOK_TRANSPORT) private readonly webhookTransport?: OpenApiWebhookTransport,
  ) {}

  onModuleInit() {
    const connection = bullmqConnection();
    this.queue = new Queue(WEBHOOK_QUEUE, { connection });
    // The isolated Gateway callback process only enqueues customer callbacks.
    // Delivery remains owned by the main API process so callback DB/HTTP capacity
    // cannot be consumed by slow customer webhook endpoints.
    if (process.env.CMPP_PROCESS_ROLE === 'callback') return;
    this.recovery = new OpenApiRecovery(this.prisma, this.sendChain, this.queue);
    this.recoveryTimer = setInterval(() => void this.recovery?.tick(), 15_000);
    this.recoveryTimer.unref?.();
    this.worker = new Worker(WEBHOOK_QUEUE, (job) => this.deliverWebhook(job.data.deliveryId), {
      connection,
      concurrency: 10,
    });
  }

  async onModuleDestroy() {
    if (this.recoveryTimer) clearInterval(this.recoveryTimer);
    await this.recovery?.close();
    await this.worker?.close();
    await this.queue?.close();
  }

  async getConfig(applicationId: string, tenantId?: string) {
    const application = await this.requireApplication(applicationId, tenantId);
    return {
      applicationId,
      applicationName: application.name,
      publicOrigin: httpApiPublicOrigin(),
      config: application.httpConfig,
      ipAllowlist: application.httpIpAllowlist.map((item) => item.ipCidr),
    };
  }

  async updateConfig(applicationId: string, input: HttpConfigInput, tenantId?: string) {
    const application = await this.requireApplication(applicationId, tenantId);
    const data = normalizeConfig(input, application.httpConfig, application.interfaceEnabled !== false);
    const ipAllowlist = normalizeIpAllowlist(input.ipAllowlist);
    const [config] = await this.prisma.$transaction([
      this.prisma.smsApplicationHttpConfig.upsert({
        where: { applicationId },
        create: { applicationId, ...data },
        update: data,
      }),
      this.prisma.smsApplicationHttpIpAllowlist.deleteMany({ where: { applicationId } }),
      ...(ipAllowlist.length > 0
        ? [
            this.prisma.smsApplicationHttpIpAllowlist.createMany({
              data: ipAllowlist.map((ipCidr) => ({ applicationId, ipCidr })),
            }),
          ]
        : []),
    ]);
    return { applicationId, publicOrigin: httpApiPublicOrigin(), config, ipAllowlist };
  }

  async listCredentials(applicationId: string, tenantId?: string) {
    await this.requireApplication(applicationId, tenantId);
    return this.prisma.httpApiCredential.findMany({
      where: { applicationId },
      select: {
        id: true,
        name: true,
        accessKey: true,
        secretLast4: true,
        status: true,
        expiresAt: true,
        lastUsedAt: true,
        lastUsedIp: true,
        createdAt: true,
        revokedAt: true,
      },
      orderBy: { createdAt: 'desc' },
    });
  }

  async createCredential(
    applicationId: string,
    data: { name?: string; expiresAt?: string; createdById?: string },
    tenantId?: string,
    selfService = false,
  ) {
    const application = await this.requireApplication(applicationId, tenantId);
    const config = application.httpConfig;
    if (!config?.enabled) throw new BadRequestException('请先开通该应用的HTTP接口');
    if (selfService && !config.credentialSelfServiceEnabled)
      throw new ForbiddenException('该应用未开通客户端凭据自助管理');
    const activeCount = await this.prisma.httpApiCredential.count({ where: { applicationId, status: 'active' } });
    if (activeCount >= config.maxCredentialCount)
      throw new BadRequestException(`有效凭据最多允许 ${config.maxCredentialCount} 个`);
    const expiresAt = data.expiresAt ? new Date(data.expiresAt) : undefined;
    if (expiresAt && expiresAt.getTime() <= Date.now()) throw new BadRequestException('凭据过期时间必须晚于当前时间');
    const secret = randomBytes(32).toString('base64url');
    const credential = await this.prisma.httpApiCredential.create({
      data: {
        applicationId,
        name:
          String(data.name ?? '默认凭据')
            .trim()
            .slice(0, 100) || '默认凭据',
        accessKey: `ak_${randomBytes(18).toString('base64url')}`,
        secretEncrypted: encryptSecret(secret),
        secretLast4: secret.slice(-4),
        expiresAt,
        createdById: data.createdById,
      },
      select: {
        id: true,
        name: true,
        accessKey: true,
        secretLast4: true,
        status: true,
        expiresAt: true,
        createdAt: true,
      },
    });
    return { ...credential, secret, secretShownOnce: true };
  }

  async revokeCredential(applicationId: string, credentialId: string, tenantId?: string) {
    const application = await this.requireApplication(applicationId, tenantId);
    if (tenantId && !application.httpConfig?.credentialSelfServiceEnabled)
      throw new ForbiddenException('该应用未开通客户端凭据自助管理');
    const result = await this.prisma.httpApiCredential.updateMany({
      where: { id: credentialId, applicationId, status: 'active' },
      data: { status: 'revoked', revokedAt: new Date() },
    });
    if (result.count !== 1) throw new NotFoundException('有效访问凭据不存在');
    return { id: credentialId, status: 'revoked' };
  }

  async getWebhookEndpoints(applicationId: string, tenantId?: string) {
    await this.requireApplication(applicationId, tenantId);
    return this.prisma.httpWebhookEndpoint.findMany({
      where: { applicationId },
      select: {
        id: true,
        eventType: true,
        url: true,
        secretLast4: true,
        status: true,
        lastTestAt: true,
        lastTestStatus: true,
        updatedAt: true,
      },
      orderBy: { eventType: 'asc' },
    });
  }

  async upsertWebhookEndpoint(
    applicationId: string,
    eventType: string,
    data: { url: string; rotateSecret?: boolean; status?: string },
    tenantId?: string,
  ) {
    const application = await this.requireApplication(applicationId, tenantId);
    if (!['receipt', 'uplink'].includes(eventType))
      throw new BadRequestException('eventType only supports receipt or uplink');
    if (!String(data.url ?? '').trim()) {
      await this.prisma.httpWebhookEndpoint.deleteMany({ where: { applicationId, eventType } });
      return {
        applicationId,
        eventType,
        url: '',
        secretLast4: '',
        status: 'inactive',
        updatedAt: new Date(),
        deleted: true,
      };
    }
    const url = await validateWebhookUrl(data.url, application.httpConfig?.requireHttps ?? true);
    const existing = await this.prisma.httpWebhookEndpoint.findUnique({
      where: { applicationId_eventType: { applicationId, eventType } },
    });
    const secret = !existing || data.rotateSecret ? randomBytes(32).toString('base64url') : undefined;
    const endpoint = await this.prisma.httpWebhookEndpoint.upsert({
      where: { applicationId_eventType: { applicationId, eventType } },
      create: {
        applicationId,
        eventType,
        url,
        status: data.status ?? 'active',
        secretEncrypted: encryptSecret(secret!),
        secretLast4: secret!.slice(-4),
      },
      update: {
        url,
        status: data.status ?? existing?.status ?? 'active',
        ...(secret ? { secretEncrypted: encryptSecret(secret), secretLast4: secret.slice(-4) } : {}),
      },
      select: { id: true, eventType: true, url: true, secretLast4: true, status: true, updatedAt: true },
    });
    return { ...endpoint, ...(secret ? { secret, secretShownOnce: true } : {}) };
  }

  async sendMessage(
    auth: OpenApiAuthContext,
    input: { mobile?: string; content?: string; clientMessageId?: string },
    meta: { idempotencyKey?: string; bodyHash: string; userAgent?: string },
  ) {
    if (!auth.config.sendEnabled)
      throw new ForbiddenException({ code: 'SEND_NOT_ENABLED', message: '该应用未开通HTTP短信发送' });
    if (
      typeof input.mobile !== 'string' ||
      typeof input.content !== 'string' ||
      (input.clientMessageId != null &&
        (typeof input.clientMessageId !== 'string' || Array.from(input.clientMessageId).length > 128))
    ) {
      throw new BadRequestException({ code: 'PARAMETER_INVALID', message: '请求字段类型或长度非法' });
    }
    const mobile = input.mobile.trim();
    const content = String(input.content ?? '');
    if (!/^1\d{10}$/.test(mobile)) throw new BadRequestException({ code: 'MOBILE_INVALID', message: '手机号格式非法' });
    if (!content.trim()) throw new BadRequestException({ code: 'CONTENT_REQUIRED', message: '短信内容不能为空' });
    const idempotencyKey = String(meta.idempotencyKey ?? '').trim();
    if (!/^[A-Za-z0-9._:-]{8,128}$/.test(idempotencyKey))
      throw new BadRequestException({
        code: 'IDEMPOTENCY_KEY_INVALID',
        message: 'Idempotency-Key 必填且长度为8至128位',
      });
    const existing = await this.prisma.openApiRequest.findUnique({
      where: { applicationId_idempotencyKey: { applicationId: auth.application.id, idempotencyKey } },
    });
    if (existing) {
      if (existing.bodyHash !== meta.bodyHash)
        throw new ConflictException({
          code: 'IDEMPOTENCY_CONFLICT',
          message: '同一Idempotency-Key对应的请求内容不一致',
        });
      if (existing.status === 'completed' && existing.responseBody) return existing.responseBody;
      if (['failed', 'requires_review'].includes(existing.status) && existing.responseBody && existing.httpStatus)
        throw new HttpException(existing.responseBody as Record<string, unknown>, existing.httpStatus);
      if (
        existing.status === 'requires_review' ||
        (existing.createdAt && Date.now() - existing.createdAt.getTime() > 600_000)
      )
        throw new ConflictException({
          code: 'REQUEST_REQUIRES_REVIEW',
          message: '请求结果待核对，请提供requestId联系支持，勿更换幂等键重发',
          requestId: existing.requestId,
        });
      throw new ConflictException({ code: 'REQUEST_PROCESSING', message: '同一请求正在处理中，请稍后查询' });
    }
    if (input.clientMessageId) {
      const duplicateClientMessage = await this.prisma.smsMessageRecord.findFirst({
        where: { applicationId: auth.application.id, clientMessageId: input.clientMessageId },
        select: { messageId: true },
      });
      if (duplicateClientMessage)
        throw new ConflictException({
          code: 'CLIENT_MESSAGE_ID_CONFLICT',
          message: `clientMessageId已关联短信 ${duplicateClientMessage.messageId}`,
        });
    }
    const requestId = `req_${randomUUID()}`;
    const startedAt = Date.now();
    let request;
    try {
      request = await this.prisma.openApiRequest.create({
        data: {
          tenantId: auth.application.tenantId,
          applicationId: auth.application.id,
          credentialId: auth.credentialId,
          requestId,
          idempotencyKey,
          bodyHash: meta.bodyHash,
          clientMessageId: input.clientMessageId,
          sourceIp: auth.sourceIp,
          userAgent: meta.userAgent,
        },
      });
    } catch (error) {
      if ((error as { code?: string }).code === 'P2002') {
        const raced = await this.prisma.openApiRequest.findUnique({
          where: { applicationId_idempotencyKey: { applicationId: auth.application.id, idempotencyKey } },
        });
        if (raced?.bodyHash !== meta.bodyHash)
          throw new ConflictException({
            code: 'IDEMPOTENCY_CONFLICT',
            message: '同一Idempotency-Key对应的请求内容不一致',
          });
        if (raced?.status === 'completed' && raced.responseBody) return raced.responseBody;
        if (raced && ['failed', 'requires_review'].includes(raced.status) && raced.responseBody && raced.httpStatus)
          throw new HttpException(raced.responseBody as Record<string, unknown>, raced.httpStatus);
        throw new ConflictException({ code: 'REQUEST_PROCESSING', message: '同一请求正在处理中，请稍后查询' });
      }
      throw error;
    }
    try {
      await this.sendChain.createHttpBatchTask({
        [HTTP_REQUEST_CONTEXT]: { id: request.id, requestId },
        tenantId: auth.application.tenantId,
        applicationId: auth.application.id,
        content,
        phones: [mobile],
        sourceIp: auth.sourceIp,
        userAgent: meta.userAgent,
        clientMessageId: input.clientMessageId,
      });
      const frozen = await this.prisma.openApiRequest.findUnique({ where: { id: request.id } });
      if (frozen?.status === 'completed' && frozen.responseBody) {
        void this.recovery?.tick();
        return frozen.responseBody;
      }
      if (frozen?.status === 'failed' && frozen.responseBody && frozen.httpStatus)
        throw new HttpException(frozen.responseBody as Record<string, unknown>, frozen.httpStatus);
      throw new Error('HTTP acceptance snapshot was not committed');
    } catch (error) {
      const frozen = await this.prisma.openApiRequest.findUnique({ where: { id: request.id } });
      if (frozen?.status === 'completed' && frozen.responseBody) return frozen.responseBody;
      if (frozen?.status === 'failed' && frozen.responseBody && frozen.httpStatus)
        throw new HttpException(frozen.responseBody as Record<string, unknown>, frozen.httpStatus);
      let outwardError = error;
      if (error instanceof HttpException && error.getStatus() === 400) {
        const response = error.getResponse();
        const message =
          typeof response === 'object' && response && 'message' in response
            ? (response as { message: unknown }).message
            : error.message;
        outwardError = new UnprocessableEntityException({ code: 'SEND_REJECTED', message });
      }
      const failure = normalizeOpenApiFailure(outwardError);
      await this.prisma.openApiRequest.update({
        where: { id: request.id },
        data: {
          status: failure.httpStatus >= 500 ? 'requires_review' : 'failed',
          httpStatus: failure.httpStatus,
          businessCode: failure.code,
          responseBody: failure.responseBody,
          durationMs: Date.now() - startedAt,
          completedAt: new Date(),
        },
      });

      throw new HttpException(failure.responseBody as Record<string, unknown>, failure.httpStatus);
    }
  }

  async getMessage(auth: OpenApiAuthContext, messageId: string) {
    if (!auth.config.messageQueryEnabled)
      throw new ForbiddenException({ code: 'MESSAGE_QUERY_NOT_ENABLED', message: '该应用未开通短信状态查询' });
    const message = await this.prisma.smsMessageRecord.findFirst({
      where: { applicationId: auth.application.id, OR: [{ messageId }, { clientMessageId: messageId }] },
      select: {
        messageId: true,
        clientMessageId: true,
        phoneNumber: true,
        status: true,
        submitStatus: true,
        receiptStatus: true,
        errorCode: true,
        errorMessage: true,
        queuedAt: true,
        submittedAt: true,
        deliveredAt: true,
        updatedAt: true,
      },
    });
    if (!message) throw new NotFoundException({ code: 'MESSAGE_NOT_FOUND', message: '短信记录不存在' });
    return message;
  }

  async listUplinks(auth: OpenApiAuthContext, query: Record<string, string | undefined>) {
    if (!auth.config.uplinkQueryEnabled)
      throw new ForbiddenException({ code: 'UPLINK_QUERY_NOT_ENABLED', message: '该应用未开通上行查询' });
    for (const value of Object.values(query)) {
      if (value !== undefined && typeof value !== 'string')
        throw new BadRequestException({ code: 'PARAMETER_INVALID', message: '查询参数必须为单个字符串' });
    }
    if (query.mobile !== undefined && !/^1\d{10}$/.test(query.mobile))
      throw new BadRequestException({ code: 'MOBILE_INVALID', message: 'mobile必须为1开头的11位手机号' });
    if (query.accessNumber !== undefined && !/^\d{1,21}$/.test(query.accessNumber))
      throw new BadRequestException({ code: 'PARAMETER_INVALID', message: 'accessNumber必须为1至21位数字接入号' });
    const endTime = query.endTime !== undefined ? parseOpenApiDate(query.endTime) : new Date();
    const startTime =
      query.startTime !== undefined ? parseOpenApiDate(query.startTime) : new Date(endTime.getTime() - 24 * 3600_000);
    if (!Number.isFinite(startTime.getTime()) || !Number.isFinite(endTime.getTime()) || startTime > endTime)
      throw new BadRequestException({ code: 'TIME_RANGE_INVALID', message: '查询时间范围非法' });
    if (endTime.getTime() - startTime.getTime() > auth.config.maxQueryRangeDays * 86400_000)
      throw new BadRequestException({
        code: 'TIME_RANGE_TOO_LARGE',
        message: `单次查询不能超过${auth.config.maxQueryRangeDays}天`,
      });
    if (
      query.limit !== undefined &&
      (!/^\d+$/.test(query.limit) || !Number.isSafeInteger(Number(query.limit)) || Number(query.limit) < 1)
    )
      throw new BadRequestException({ code: 'LIMIT_INVALID', message: 'limit必须为正整数' });
    const limit = Math.min(Number(query.limit ?? 50), auth.config.maxPageSize);
    const cursor = decodeCursor(query.cursor);
    const rows = await this.prisma.smsUplinkMessage.findMany({
      where: {
        applicationId: auth.application.id,
        matchStatus: 'matched',
        receivedAt: { gte: startTime, lte: endTime },
        phoneNumber: query.mobile,
        destId: query.accessNumber,
        content: query.keyword ? { contains: query.keyword } : undefined,
        ...(cursor
          ? {
              OR: [{ receivedAt: { lt: cursor.receivedAt } }, { receivedAt: cursor.receivedAt, id: { lt: cursor.id } }],
            }
          : {}),
      },
      select: {
        id: true,
        messageId: true,
        phoneNumber: true,
        destId: true,
        content: true,
        receivedAt: true,
      },
      orderBy: [{ receivedAt: 'desc' }, { id: 'desc' }],
      take: limit + 1,
    });
    const hasMore = rows.length > limit;
    const items = rows.slice(0, limit);
    const last = items.at(-1);
    return { items, nextCursor: hasMore && last ? encodeCursor(last.receivedAt, last.id) : null };
  }

  async getUplink(auth: OpenApiAuthContext, uplinkId: string) {
    if (!auth.config.uplinkQueryEnabled)
      throw new ForbiddenException({ code: 'UPLINK_QUERY_NOT_ENABLED', message: '该应用未开通上行查询' });
    const row = await this.prisma.smsUplinkMessage.findFirst({
      where: {
        id: uplinkId,
        applicationId: auth.application.id,
        tenantId: auth.application.tenantId,
        matchStatus: 'matched',
      },
      select: {
        id: true,
        messageId: true,
        phoneNumber: true,
        destId: true,
        content: true,
        receivedAt: true,
        tenantId: true,
        applicationId: true,
      },
    });
    if (!row) throw new NotFoundException({ code: 'UPLINK_NOT_FOUND', message: '上行记录不存在' });
    return row;
  }

  async queueWebhookEvent(
    data: {
      tenantId: string;
      applicationId?: string | null;
      messageRecordId?: string | null;
      messageId?: string | null;
      uplinkMessageId?: string | null;
      eventType: 'receipt' | 'uplink';
      payload: Record<string, unknown>;
    },
    transaction?: Prisma.TransactionClient,
  ) {
    const db = transaction ?? this.prisma;
    if (!data.applicationId) return null;
    const application = await db.smsApplication.findUnique({
      where: { id: data.applicationId },
      include: { httpConfig: true },
    });
    const config = application?.httpConfig;
    const enabled = data.eventType === 'receipt' ? config?.receiptWebhookEnabled : config?.uplinkWebhookEnabled;
    if (!config?.enabled || !enabled) return null;
    const endpoint = await db.httpWebhookEndpoint.findUnique({
      where: { applicationId_eventType: { applicationId: data.applicationId, eventType: data.eventType } },
    });
    if (!endpoint || endpoint.status !== 'active') return null;
    const eventId =
      data.eventType === 'receipt' && data.messageRecordId
        ? `evt_receipt_${data.messageRecordId}`
        : data.eventType === 'uplink' && data.uplinkMessageId
          ? `evt_uplink_${data.uplinkMessageId}`
          : `evt_${randomUUID()}`;
    const persist = async (tx: Prisma.TransactionClient) => {
      const event = await tx.httpWebhookEvent.upsert({
        where: { eventId },
        update: {},
        create: {
          eventId,
          tenantId: data.tenantId,
          applicationId: data.applicationId!,
          eventType: data.eventType,
          messageRecordId: data.messageRecordId,
          messageId: data.messageId,
          uplinkMessageId: data.uplinkMessageId,
          payload: data.payload as Prisma.InputJsonValue,
        },
      });
      return tx.httpWebhookDelivery.upsert({
        where: { eventId_endpointId: { eventId: event.id, endpointId: endpoint.id } },
        update: {},
        create: { eventId: event.id, endpointId: endpoint.id, recoveryVersion: 1 },
      });
    };
    const delivery = transaction ? await persist(transaction) : await this.prisma.$transaction(persist);
    if (transaction) return delivery;
    if (delivery.status !== 'pending' || delivery.recoveryVersion !== 1) return delivery;
    await this.queue?.add(
      'deliver',
      { deliveryId: delivery.id },
      { jobId: webhookJobId(delivery.id, 1), removeOnComplete: 1000, removeOnFail: 1000 },
    );
    return delivery;
  }

  async listRequestLogs(applicationId: string, tenantId?: string) {
    await this.requireApplication(applicationId, tenantId);
    return this.prisma.openApiRequest.findMany({
      where: { applicationId },
      select: {
        id: true,
        requestId: true,
        clientMessageId: true,
        sourceIp: true,
        httpStatus: true,
        businessCode: true,
        status: true,
        durationMs: true,
        createdAt: true,
        completedAt: true,
      },
      orderBy: { createdAt: 'desc' },
      take: 100,
    });
  }

  async listWebhookDeliveries(applicationId: string, tenantId?: string) {
    await this.requireApplication(applicationId, tenantId);
    return this.prisma.httpWebhookDelivery.findMany({
      where: { event: { applicationId } },
      include: {
        event: true,
        endpoint: { select: { eventType: true, url: true } },
        attempts: { orderBy: { attemptNo: 'desc' }, take: 5 },
      },
      orderBy: { createdAt: 'desc' },
      take: 100,
    });
  }

  async retryWebhookDelivery(applicationId: string, deliveryId: string, tenantId?: string) {
    const application = await this.requireApplication(applicationId, tenantId);
    if (tenantId && !application.httpConfig?.allowClientManualRetry)
      throw new ForbiddenException('该应用未开通客户端手动重投');
    const delivery = await this.prisma.httpWebhookDelivery.findFirst({
      where: { id: deliveryId, event: { applicationId } },
    });
    if (!delivery) throw new NotFoundException('Webhook投递记录不存在');
    const reset = await this.prisma.httpWebhookDelivery.updateMany({
      where: {
        id: delivery.id,
        status: { in: ['pending', 'retrying', 'failed'] },
        attemptCount: delivery.attemptCount,
        OR: [{ leaseUntil: null }, { leaseUntil: { lt: new Date() } }],
      },
      data: {
        status: 'pending',
        nextRetryAt: null,
        lastError: null,
        recoveryVersion: 1,
        leaseToken: null,
        leaseUntil: null,
      },
    });
    if (!reset.count) throw new ConflictException('回调正在投递或已成功，不能重投');
    await this.queue?.add(
      'deliver',
      { deliveryId },
      { jobId: webhookJobId(deliveryId, Date.now()), removeOnComplete: 1000, removeOnFail: 1000 },
    );
    return { id: deliveryId, status: 'pending' };
  }

  private async deliverWebhook(deliveryId: string) {
    const delivery = await this.prisma.httpWebhookDelivery.findUnique({
      where: { id: deliveryId },
      include: { event: true, endpoint: true },
    });
    if (!delivery || !['pending', 'retrying', 'delivering'].includes(delivery.status)) return;
    if (delivery.nextRetryAt && delivery.nextRetryAt.getTime() > Date.now()) return;
    const config = await this.prisma.smsApplicationHttpConfig.findUnique({
      where: { applicationId: delivery.event.applicationId },
    });
    if (
      !config?.enabled ||
      delivery.endpoint.status !== 'active' ||
      !(delivery.event.eventType === 'receipt' ? config.receiptWebhookEnabled : config.uplinkWebhookEnabled)
    )
      return;
    const leaseToken = randomUUID();
    const claimed = await this.prisma.httpWebhookDelivery.updateMany({
      where: {
        id: deliveryId,
        status: delivery.status,
        attemptCount: delivery.attemptCount,
        OR: [{ leaseUntil: null }, { leaseUntil: { lt: new Date() } }],
      },
      data: {
        status: 'delivering',
        leaseToken,
        leaseUntil: new Date(Date.now() + config.webhookTimeoutSeconds * 1000 + 60_000),
      },
    });
    if (!claimed.count) return;
    const attemptNo = delivery.attemptCount + 1;
    const timestamp = String(Math.floor(Date.now() / 1000));
    const body = JSON.stringify({
      eventId: delivery.event.eventId,
      eventType: delivery.event.eventType,
      occurredAt: delivery.event.createdAt.toISOString(),
      data: delivery.event.payload,
    });
    const signature = createHmac('sha256', decryptSecret(delivery.endpoint.secretEncrypted))
      .update(`${timestamp}\n${body}`)
      .digest('hex');
    const startedAt = Date.now();
    let responseStatus: number | undefined;
    let responseSummary: string | undefined;
    let errorMessage: string | undefined;
    try {
      const response = await (this.webhookTransport ?? postWebhook)(
        delivery.endpoint.url,
        body,
        {
          'content-type': 'application/json',
          'x-event-id': delivery.event.eventId,
          'x-event-type': delivery.event.eventType,
          'x-timestamp': timestamp,
          'x-signature': `sha256=${signature}`,
        },
        config.webhookTimeoutSeconds * 1000,
        config.requireHttps,
      );
      responseStatus = response.status;
      responseSummary = response.body;
    } catch (error) {
      errorMessage = error instanceof Error ? error.message : 'Webhook request failed';
    }
    const success = responseStatus !== undefined && responseStatus >= 200 && responseStatus < 300;
    const retryable =
      errorMessage !== undefined ||
      responseStatus === 408 ||
      responseStatus === 429 ||
      (responseStatus !== undefined && responseStatus >= 500);
    this.protocolLogs?.record({
      protocol: 'http',
      direction: 'platform_to_client',
      eventType: `${delivery.event.eventType}_webhook`,
      status: success ? 'success' : retryable ? 'retrying' : 'failed',
      tenantId: delivery.event.tenantId,
      applicationId: delivery.event.applicationId,
      messageId: delivery.event.messageId,
      requestId: delivery.event.eventId,
      resultCode: responseStatus ?? 'NETWORK_ERROR',
      durationMs: Date.now() - startedAt,
      payloadBytes: Buffer.byteLength(body, 'utf8'),
      retryCount: attemptNo - 1,
      detail: { deliveryId, attemptNo, error: errorMessage },
    });
    const maxAttempts = Math.min(config.webhookMaxAttempts, RETRY_DELAYS_SECONDS.length);
    const willRetry = !success && config.webhookRetryEnabled && retryable && attemptNo < maxAttempts;
    const delaySeconds = RETRY_DELAYS_SECONDS[attemptNo] ?? RETRY_DELAYS_SECONDS.at(-1)!;
    const nextRetryAt = willRetry ? new Date(Date.now() + delaySeconds * 1000) : null;
    await this.prisma.$transaction(async (tx) => {
      const updated = await tx.httpWebhookDelivery.updateMany({
        where: { id: deliveryId, leaseToken },
        data: {
          status: success ? 'delivered' : willRetry ? 'retrying' : 'failed',
          attemptCount: attemptNo,
          lastHttpStatus: responseStatus,
          lastError: success ? null : (errorMessage ?? 'HTTP ' + responseStatus),
          deliveredAt: success ? new Date() : null,
          nextRetryAt,
          leaseToken: null,
          leaseUntil: null,
        },
      });
      if (!updated.count) return;
      await tx.httpWebhookAttempt.create({
        data: {
          deliveryId,
          attemptNo,
          responseStatus,
          responseSummary,
          errorMessage,
          durationMs: Date.now() - startedAt,
          requestHeaders: {
            'x-event-id': delivery.event.eventId,
            'x-event-type': delivery.event.eventType,
            'x-timestamp': timestamp,
            'x-signature': 'sha256=***',
          },
        },
      });
    });
    if (willRetry)
      await this.queue?.add(
        'deliver',
        { deliveryId },
        {
          jobId: webhookJobId(deliveryId, attemptNo + 1),
          delay: delaySeconds * 1000,
          removeOnComplete: 1000,
          removeOnFail: 1000,
        },
      );
  }

  private async requireApplication(applicationId: string, tenantId?: string) {
    const application = await this.prisma.smsApplication.findFirst({
      where: { id: applicationId, tenantId },
      include: { httpConfig: true, httpIpAllowlist: true },
    });
    if (!application) throw new NotFoundException('企业应用不存在');
    return application;
  }
}

function httpApiPublicOrigin() {
  const configured = process.env.HTTP_API_PUBLIC_ORIGIN?.trim().replace(/\/+$/, '');
  if (!configured) return undefined;
  const url = new URL(configured);
  const insecureHttpExplicitlyAllowed =
    process.env.HTTP_API_ALLOW_INSECURE_ORIGIN === 'true' && url.protocol === 'http:';
  if (
    (url.protocol !== 'https:' && !insecureHttpExplicitlyAllowed) ||
    url.username ||
    url.password ||
    url.pathname !== '/' ||
    url.search ||
    url.hash
  ) {
    // This value is copied into customer integration parameters, so fail closed instead of
    // publishing an insecure or path-dependent endpoint unless an isolated test environment
    // has explicitly opted into plain HTTP.
    throw new Error(
      'HTTP_API_PUBLIC_ORIGIN必须是无路径、无凭据的HTTPS源地址；隔离测试环境如需HTTP须显式启用HTTP_API_ALLOW_INSECURE_ORIGIN',
    );
  }
  return url.origin;
}

function normalizeOpenApiFailure(error: unknown) {
  const failure = publicOpenApiFailure(error);
  return {
    httpStatus: failure.status,
    code: failure.code,
    responseBody: { code: failure.code, message: failure.message } as Prisma.InputJsonValue,
  };
}

function normalizeConfig(
  input: HttpConfigInput,
  existing: { enabled?: boolean } | null | undefined,
  cmppEnabled: boolean,
) {
  const enabling = input.enabled === true && existing?.enabled !== true;
  const effective = enabling
    ? {
        sendEnabled: true,
        messageQueryEnabled: true,
        receiptWebhookEnabled: true,
        uplinkWebhookEnabled: true,
        uplinkQueryEnabled: true,
        credentialSelfServiceEnabled: true,
        ...input,
      }
    : input;
  const httpEnabled = effective.enabled ?? existing?.enabled ?? false;
  const deliveryMode = automaticDeliveryMode(cmppEnabled, httpEnabled);
  return {
    enabled: effective.enabled,
    sendEnabled: effective.sendEnabled,
    messageQueryEnabled: effective.messageQueryEnabled,
    receiptWebhookEnabled: effective.receiptWebhookEnabled,
    uplinkWebhookEnabled: effective.uplinkWebhookEnabled,
    uplinkQueryEnabled: effective.uplinkQueryEnabled,
    credentialSelfServiceEnabled: effective.credentialSelfServiceEnabled,
    qpsLimit: bounded(effective.qpsLimit, 1, 1000, 'QPS'),
    timestampToleranceSeconds: bounded(effective.timestampToleranceSeconds, 60, 900, '时间戳容差'),
    maxCredentialCount: bounded(effective.maxCredentialCount, 1, 10, '凭据数'),
    uplinkRetentionDays: bounded(effective.uplinkRetentionDays, 1, 365, '上行保留天数'),
    maxQueryRangeDays: bounded(effective.maxQueryRangeDays, 1, 90, '查询跨度'),
    maxPageSize: bounded(effective.maxPageSize, 10, 500, '分页上限'),
    receiptDeliveryMode: deliveryMode,
    uplinkDeliveryMode: deliveryMode,
    webhookRetryEnabled: effective.webhookRetryEnabled,
    webhookMaxAttempts: bounded(effective.webhookMaxAttempts, 1, 7, '回调重试次数'),
    webhookTimeoutSeconds: bounded(effective.webhookTimeoutSeconds, 1, 30, '回调超时'),
    requireHttps: effective.requireHttps,
    allowClientManualRetry: effective.allowClientManualRetry,
    allowClientTest: effective.allowClientTest,
  };
}

function bounded(value: number | undefined, min: number, max: number, label: string) {
  if (value === undefined) return undefined;
  if (!Number.isInteger(value) || value < min || value > max)
    throw new BadRequestException(`${label}必须在${min}至${max}之间`);
  return value;
}

function normalizeIpAllowlist(values?: string[]) {
  return [
    ...new Set(
      (values ?? [])
        .map((item) => item.trim())
        .filter(Boolean)
        .map((item) => {
          const [ip, prefix] = item.split('/');
          const version = isIP(ip);
          if (!version) throw new BadRequestException(`IP白名单格式非法：${item}`);
          if (prefix !== undefined) {
            const bits = Number(prefix);
            const max = version === 4 ? 32 : 128;
            if (!Number.isInteger(bits) || bits < 0 || bits > max)
              throw new BadRequestException(`CIDR格式非法：${item}`);
          }
          return item;
        }),
    ),
  ];
}

async function validateWebhookUrl(value: string, requireHttps: boolean) {
  return (await resolveWebhookTarget(value, requireHttps)).url.toString();
}

export async function resolveWebhookTarget(value: string, requireHttps: boolean) {
  let url: URL;
  try {
    url = new URL(String(value ?? '').trim());
  } catch {
    throw new BadRequestException('Webhook URL格式非法');
  }
  if (!['http:', 'https:'].includes(url.protocol)) throw new BadRequestException('Webhook仅支持HTTP/HTTPS');
  if (requireHttps && url.protocol !== 'https:') throw new BadRequestException('当前应用要求Webhook使用HTTPS');
  if (url.username || url.password) throw new BadRequestException('Webhook URL不能包含用户名或密码');
  const hostname = url.hostname.startsWith('[') ? url.hostname.slice(1, -1) : url.hostname;
  let addresses: Array<{ address: string }>;
  try {
    addresses = isIP(hostname) ? [{ address: hostname }] : await lookup(hostname, { all: true });
  } catch {
    throw new BadRequestException('Webhook域名未解析到可用地址');
  }
  if (addresses.some(({ address }) => isPrivateAddress(address)))
    throw new BadRequestException('Webhook URL不能指向内网、环回或链路本地地址');
  const selected = addresses[0];
  if (!selected) throw new BadRequestException('Webhook域名未解析到可用地址');
  return { url, address: selected.address, family: isIP(selected.address) };
}

async function postWebhook(
  urlText: string,
  body: string,
  headers: Record<string, string>,
  timeoutMs: number,
  requireHttps: boolean,
) {
  const target = await resolveWebhookTarget(urlText, requireHttps);
  return new Promise<{ status: number; body: string }>((resolve, reject) => {
    const requestFn = target.url.protocol === 'https:' ? httpsRequest : httpRequest;
    const request = requestFn(
      target.url,
      {
        method: 'POST',
        headers: { ...headers, 'content-length': String(Buffer.byteLength(body)) },
        lookup: pinnedWebhookLookup(target.address, target.family),
      },
      (response) => {
        const chunks: Buffer[] = [];
        let size = 0;
        response.on('data', (chunk: Buffer) => {
          if (size < 1000) {
            const buffer = Buffer.from(chunk);
            chunks.push(buffer.subarray(0, 1000 - size));
            size += buffer.length;
          }
        });
        response.on('end', () =>
          resolve({ status: response.statusCode ?? 0, body: Buffer.concat(chunks).toString('utf8') }),
        );
      },
    );
    request.setTimeout(timeoutMs, () => request.destroy(new Error('Webhook request timed out')));
    request.on('error', reject);
    request.end(body);
  });
}

function isPrivateAddress(address: string) {
  const canonical = isIP(address) === 6 ? new URL(`http://[${address}]`).hostname.slice(1, -1) : address;
  const mapped = /^::ffff:([a-f0-9]{1,4}):([a-f0-9]{1,4})$/i.exec(canonical);
  if (mapped) {
    const high = parseInt(mapped[1], 16),
      low = parseInt(mapped[2], 16);
    return isPrivateAddress(`${high >> 8}.${high & 255}.${low >> 8}.${low & 255}`);
  }
  const normalized = canonical.toLowerCase();
  if (
    normalized === '::1' ||
    normalized === '::' ||
    normalized.startsWith('fc') ||
    normalized.startsWith('fd') ||
    normalized.startsWith('fe8') ||
    normalized.startsWith('fe9') ||
    normalized.startsWith('fea') ||
    normalized.startsWith('feb')
  )
    return true;
  if (isIP(normalized) !== 4) return false;
  const [a, b] = normalized.split('.').map(Number);
  return (
    a === 10 ||
    a === 127 ||
    a === 0 ||
    (a === 169 && b === 254) ||
    (a === 172 && b >= 16 && b <= 31) ||
    (a === 192 && b === 168) ||
    (a === 100 && b >= 64 && b <= 127)
  );
}

function encodeCursor(receivedAt: Date, id: string) {
  return Buffer.from(JSON.stringify([receivedAt.toISOString(), id])).toString('base64url');
}
function decodeCursor(value?: string) {
  if (!value) return null;
  try {
    if (value.length > 2048 || !/^[A-Za-z0-9_-]+$/.test(value)) throw new Error();
    const parsed: unknown = JSON.parse(Buffer.from(value, 'base64url').toString('utf8'));
    if (!Array.isArray(parsed) || parsed.length !== 2 || typeof parsed[0] !== 'string' || typeof parsed[1] !== 'string')
      throw new Error();
    const [date, id] = parsed;
    const receivedAt = parseOpenApiDate(date);
    if (!id || !Number.isFinite(receivedAt.getTime())) throw new Error();
    return { receivedAt, id };
  } catch {
    throw new BadRequestException({ code: 'CURSOR_INVALID', message: 'cursor格式非法' });
  }
}

function bullmqConnection() {
  const url = new URL(process.env.REDIS_URL ?? 'redis://127.0.0.1:6379');
  return {
    host: url.hostname,
    port: Number(url.port || 6379),
    username: url.username || undefined,
    password: url.password || undefined,
    db: Number(url.pathname.slice(1) || 0),
    maxRetriesPerRequest: null as null,
  };
}