import { apiRequestData } from './http';

export type TravelReconciliationBatchStatus = 'draft' | 'reconciled';
export type TravelReconciliationItemKind = 'order' | 'orphan_transaction';
export type TravelReconciliationMatchStatus =
  | 'matched'
  | 'amount_mismatch'
  | 'currency_mismatch'
  | 'missing_transaction'
  | 'duplicate_charge'
  | 'orphan_transaction'
  | 'reversed_after_payment';
export type TravelReconciliationResolutionStatus = 'pending' | 'confirmed';

export type TravelReconciliationSummary = {
  totalOrders: number;
  totalTransactions: number;
  matchedItems: number;
  pendingItems: number;
  anomalyItems: number;
  totalOrderAmount: string;
  totalSettledAmount: string;
  totalReversedAmount: string;
  matchRate: string;
};

export type TravelReconciliationBatchSummary = {
  id: string;
  batchNo: string;
  legalEntityId: string;
  costCenterId: string | null;
  periodStart: string | null;
  periodEnd: string | null;
  status: TravelReconciliationBatchStatus;
  summary: TravelReconciliationSummary;
  confirmedAt: string | null;
  confirmedBy: string | null;
  createdAt: string | null;
  updatedAt: string | null;
  legalEntity: {
    id: string;
    code: string;
    name: string;
  } | null;
  costCenter: {
    id: string;
    code: string;
    name: string;
    legalEntityId: string;
  } | null;
  confirmedByEmployee: {
    id: string;
    employeeNo: string;
    name: string;
  } | null;
};

export type TravelReconciliationItem = {
  id: string;
  itemKind: TravelReconciliationItemKind;
  travelRequestId: string | null;
  travelOrderId: string | null;
  cardTransactionId: string | null;
  matchStatus: TravelReconciliationMatchStatus;
  resolutionStatus: TravelReconciliationResolutionStatus;
  orderAmount: string | null;
  transactionAmount: string | null;
  currency: string | null;
  anomalyCode: string | null;
  confirmedAt: string | null;
  confirmedBy: string | null;
  confirmNote: string | null;
  snapshot: {
    requestNo: string | null;
    externalOrderNo: string | null;
    externalTxnId: string | null;
    travelOrderStatus: string | null;
    transactionStatus: string | null;
    linkedReimbursementId: string | null;
    boundInvoiceCount: number;
    boundInvoiceAmount: string;
    matchedTransactionIds: string[];
    reasonDetail: string | null;
  };
  travelRequest: {
    id: string;
    requestNo: string | null;
  } | null;
  travelOrder: {
    id: string;
    externalOrderNo: string;
    status: string;
  } | null;
  cardTransaction: {
    id: string;
    externalTxnId: string;
    status: string;
    txnType: string;
  } | null;
  actions: {
    canConfirm: boolean;
    canReopen: boolean;
  };
};

export type TravelReconciliationBatchDetail = TravelReconciliationBatchSummary & {
  items: TravelReconciliationItem[];
  permissions: {
    canManagePayments: boolean;
  };
};

export type TravelReconciliationListResponse = {
  page: number;
  pageSize: number;
  total: number;
  items: TravelReconciliationBatchSummary[];
};

export type TravelReconciliationListQuery = {
  status?: TravelReconciliationBatchStatus;
  legalEntityId?: string;
  costCenterId?: string;
  periodStart?: string;
  periodEnd?: string;
  page?: number;
  pageSize?: number;
};

export type TravelReconciliationCreatePayload = {
  legalEntityId: string;
  costCenterId?: string;
  periodStart: string;
  periodEnd: string;
};

export type TravelReconciliationFinalizeResponse = {
  batchId: string;
  batchNo: string;
  status: TravelReconciliationBatchStatus;
};

export type TravelReconciliationRequeueResponse = {
  outboxId: string;
  status: string;
  duplicated: boolean;
  requeued: boolean;
  eventType: string;
};

function toQueryString(query: Record<string, string | number | boolean | undefined>) {
  const params = new URLSearchParams();
  for (const [key, value] of Object.entries(query)) {
    if (value == null || value === '') {
      continue;
    }
    params.set(key, typeof value === 'boolean' ? (value ? '1' : '0') : String(value));
  }
  const encoded = params.toString();
  return encoded ? `?${encoded}` : '';
}

export async function fetchTravelReconciliationBatches(query: TravelReconciliationListQuery = {}) {
  return apiRequestData<TravelReconciliationListResponse>(
    `/api/travel/reconciliation/batches${toQueryString(query as Record<string, string | number | boolean | undefined>)}`,
  );
}

export async function createTravelReconciliationBatch(payload: TravelReconciliationCreatePayload) {
  return apiRequestData<TravelReconciliationBatchDetail>('/api/travel/reconciliation/batches', {
    method: 'POST',
    body: JSON.stringify(payload),
  });
}

export async function fetchTravelReconciliationBatchDetail(batchId: string) {
  return apiRequestData<TravelReconciliationBatchDetail>(`/api/travel/reconciliation/batches/${batchId}`);
}

export async function confirmTravelReconciliationItem(itemId: string, payload: { note?: string | null } = {}) {
  return apiRequestData<{ batchId: string; summary: TravelReconciliationSummary; item: TravelReconciliationItem }>(
    `/api/travel/reconciliation/items/${itemId}/confirm`,
    {
      method: 'POST',
      body: JSON.stringify(payload),
    },
  );
}

export async function reopenTravelReconciliationItem(itemId: string) {
  return apiRequestData<{ batchId: string; summary: TravelReconciliationSummary; item: TravelReconciliationItem }>(
    `/api/travel/reconciliation/items/${itemId}/reopen`,
    {
      method: 'POST',
      body: JSON.stringify({}),
    },
  );
}

export async function finalizeTravelReconciliationBatch(batchId: string) {
  return apiRequestData<TravelReconciliationFinalizeResponse>(
    `/api/travel/reconciliation/batches/${batchId}/finalize`,
    {
      method: 'POST',
      body: JSON.stringify({}),
    },
  );
}