// R8 contract-only declarations. Runtime behavior remains in SendChainService.

export interface CreateBatchTaskDto {
  tenantId: string;
  applicationId?: string;
  templateId?: string;
  content: string;
  category?: string;
  phones: string[];
  sendMode?: 'immediate' | 'scheduled';
  scheduledAt?: string;
  variables?: Record<string, unknown>;
  createdById?: string;
  sourceIp?: string;
  userAgent?: string;
  sourceType?: 'client' | 'api' | 'cmpp';
  clientMessageId?: string;
}

export type CreateHttpBatchTaskDto = Omit<CreateBatchTaskDto, 'templateId' | 'variables' | 'sourceType'>;

export interface GatewayInboundAuthDto {
  account: string;
  password?: string;
  authSource?: string;
  timestamp?: number;
  remoteIp?: string;
  version?: string;
  requestedVersion?: number;
}

export interface GatewayInboundSubmitDto {
  requestId?: string;
  account: string;
  phoneNumber?: string;
  phoneNumbers?: string[];
  content: string;
  srcId?: string;
  destId?: string;
  sequenceId?: number;
  registeredDelivery?: number;
  remoteIp?: string;
  longMessage?: {
    reference: number;
    total: number;
    index: number;
    format: number;
  };
}

export interface GatewayInboundSingleSubmitResult {
  accepted: boolean;
  tenantId: string;
  applicationId: string;
  taskId: string;
  messageId: string;
  messageRecordId: string;
  status: string;
}

export interface GatewaySubmitResultDto {
  eventId?: string;
  traceId?: string;
  messageId: string;
  channelId: string;
  submitId?: string;
  sequenceId?: number;
  gatewayMessageId: string;
  submitStatus: 'accepted' | 'rejected' | 'timeout';
  errorCode?: string;
  errorMessage?: string;
  submittedAt?: string;
  segments?: Array<{
    segmentTotal?: number;
    segmentIndex?: number;
    sequenceId?: number;
    gatewayMessageId?: string;
    submitStatus?: 'accepted' | 'rejected' | 'timeout' | string;
    errorCode?: string;
    errorMessage?: string;
    submittedAt?: string;
  }>;
}

export interface GatewaySubmitSegmentResultDto {
  eventId?: string;
  traceId?: string;
  messageId: string;
  channelId: string;
  submitId?: string;
  segmentTotal: number;
  segmentIndex: number;
  sequenceId?: number;
  gatewayMessageId?: string;
  submitStatus: 'accepted' | 'rejected' | 'timeout' | string;
  errorCode?: string;
  errorMessage?: string;
  submittedAt?: string;
}

export interface GatewayReceiptEventDto {
  eventId?: string;
  traceId?: string;
  messageId?: string;
  channelId: string;
  sequenceId?: number;
  gatewayMessageId: string;
  phoneNumber?: string;
  receiptStatus: 'delivered' | 'undelivered' | 'unknown';
  rawStatus: string;
  errorCode?: string;
  errorMessage?: string;
  deliveredAt?: string;
  connectionId?: string;
}

export interface GatewayUplinkEventDto {
  eventId?: string;
  traceId?: string;
  messageId?: string;
  channelId: string;
  sequenceId?: number;
  phoneNumber: string;
  destId: string;
  content: string;
  receivedAt?: string;
}

export type UplinkMatchCandidateInput = {
  tenantId: string;
  applicationId: string;
  messageRecordId?: string;
  matchSource: 'access_number' | 'phone_window';
  confidence: number;
  reason: string;
};

export interface GatewayPendingDeliveryQueryDto {
  account: string;
  limit?: number;
  claimId?: string;
  leaseMs?: number;
}

export interface GatewayDownstreamSentDto {
  id: string;
  claimId?: string;
  connectionId?: string;
  sequenceId?: string;
  messageId?: string;
  sentAt?: string;
  ackDeadlineAt?: string;
}

export interface GatewayDownstreamAcknowledgedDto extends GatewayDownstreamSentDto {
  result: number;
  acknowledgedAt?: string;
}

export type GatewayDownstreamFailureType =
  | 'claim_released'
  | 'send_failed'
  | 'ack_timeout'
  | 'ack_rejected'
  | 'ack_invalid'
  | 'connection_lost'
  | 'unrecoverable'
  | 'queue_timeout';

export type GatewayControlDeliveryResult = {
  sent?: boolean;
  delivered?: boolean;
  retryable?: boolean;
  reasonCode?: string;
  errorMessage?: string;
  connectionId?: string;
  sequenceId?: string;
  messageId?: string;
  sentAt?: string;
  ackDeadlineAt?: string;
};

export interface GatewaySubmitDeadLetterDto {
  streamMessageId: string;
  traceId?: string;
  messageId?: string;
  channelId?: string;
  tenantId?: string;
  applicationId?: string;
  submitId?: string;
  failureCode: string;
  failureMessage: string;
  attempts: number;
  maxAttempts: number;
  commandPayload?: Record<string, unknown>;
  rawPayload?: string;
  deadLetteredAt?: string;
}

export interface RequeueGatewaySubmitExceptionDto {
  confirmedNotSubmitted?: boolean;
  reason?: string;
  operatorId?: string;
}

export interface GatewayDownstreamRecoveryStatusDto {
  account: string;
  gatewayInstanceId?: string;
  state: string;
  lockOwner?: string;
  lockExpiresAt?: string;
  lastAttemptAt?: string;
  lastSuccessAt?: string;
  lastFailureAt?: string;
  nextRetryAt?: string;
  attemptCount?: number;
  failureCategory?: string;
  lastError?: string;
  lastSkipReason?: string;
}

export interface TimeoutUnknownDto {
  olderThanHours?: number;
}

export interface ImportPreviewDto {
  tenantId: string;
  applicationId?: string;
  content: string;
  fileName?: string;
  encoding?: 'utf8' | 'gbk';
  delimiter?: ',' | '\t';
  requiredVariables?: string[];
}

export interface ConfirmImportDto extends CreateBatchTaskDto {
  importContent: string;
  requiredVariables?: string[];
}

export interface SendJob {
  messageRecordId: string;
}

export type QueuePriority = 'normal' | 'priority';

export type RoutedChannel = {
  channel: {
    id: string;
    code: string;
    account: string;
    srcId: string;
    rateLimitPerSecond: number;
    unitPrice: number;
    status: string;
    carrier?: string | null;
    sendRegion: string;
    gatewayHost: string;
    gatewayPort: number;
    passwordCipher: string;
    cmppVersion: string;
    config?: unknown;
  };
  carrier: string;
  province?: string | null;
  groupId: string;
  groupName: string;
  routeScope: 'province' | 'national';
};