import { apiRequestData } from "./http";

export type DelegationStatus = "active" | "scheduled" | "expired" | "revoked";

export type DelegationItem = {
  id: string;
  principalEmployeeId: string;
  delegateEmployeeId: string;
  scope: "reimbursement_submit" | "all";
  validFrom: string;
  validTo: string | null;
  revokedAt: string | null;
  createdAt: string;
  status: DelegationStatus;
  principal?: {
    id: string;
    employeeNo: string;
    name: string;
    departmentId: string;
    status: string;
    roleCodes: string[];
  } | null;
  delegate?: {
    id: string;
    employeeNo: string;
    name: string;
    departmentId: string;
    status: string;
    roleCodes: string[];
  } | null;
};

export type CreateDelegationRequest = {
  delegateEmployeeId: string;
  scope?: "reimbursement_submit" | "all";
  validFrom?: string;
  validTo?: string;
};

export type CreateDelegationResponse = {
  delegation: DelegationItem;
};

export type FetchMyDelegationsResponse = {
  status: "active" | "scheduled" | "expired" | "revoked" | "all";
  initiated: DelegationItem[];
  received: DelegationItem[];
};

export async function createDelegation(payload: CreateDelegationRequest) {
  return apiRequestData<CreateDelegationResponse>("/api/delegations", {
    method: "POST",
    body: JSON.stringify(payload),
  });
}

export async function fetchMyDelegations(status: FetchMyDelegationsResponse["status"] = "active") {
  const params = new URLSearchParams();
  if (status && status !== "active") {
    params.set("status", status);
  }
  const query = params.toString();
  return apiRequestData<FetchMyDelegationsResponse>(`/api/delegations/mine${query ? `?${query}` : ""}`);
}

export async function revokeDelegation(delegationId: string) {
  return apiRequestData<{ delegation: DelegationItem; outcome: string }>(
    `/api/delegations/${delegationId}/revoke`,
    {
      method: "POST",
      body: JSON.stringify({}),
    },
  );
}