import { apiRequestData } from "./http";

export type ExpenseStandardPerUnit = "item" | "day" | "trip";
export type ExpenseStandardControlMode = "warn" | "block";
export type ExpenseStandardScopeType = "global" | "department";

export type ExpenseStandard = {
  id: string;
  expenseTypeId: string;
  expenseTypeName: string | null;
  name: string;
  maxAmount: string;
  perUnit: ExpenseStandardPerUnit;
  controlMode: ExpenseStandardControlMode;
  scopeType: ExpenseStandardScopeType;
  scopeKey: string | null;
  scopeLabel: string;
  enabled: boolean;
  note: string | null;
  createdAt: string | null;
  updatedAt: string | null;
};

export type ExpenseStandardListResponse = {
  expenseTypeId: string | null;
  scopeType: ExpenseStandardScopeType | null;
  enabled: boolean | null;
  items: ExpenseStandard[];
};

export type ExpenseStandardListQuery = {
  expenseTypeId?: string;
  scopeType?: ExpenseStandardScopeType;
  enabled?: boolean;
};

export type CreateExpenseStandardPayload = {
  expenseTypeId: string;
  name: string;
  maxAmount: string;
  perUnit?: ExpenseStandardPerUnit;
  controlMode?: ExpenseStandardControlMode;
  scopeType?: ExpenseStandardScopeType;
  scopeKey?: string | null;
  enabled?: boolean;
  note?: string | null;
};

export type UpdateExpenseStandardPayload = Partial<CreateExpenseStandardPayload>;

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, String(value));
  }

  const encoded = params.toString();
  return encoded ? `?${encoded}` : "";
}

export async function fetchExpenseStandards(query: ExpenseStandardListQuery = {}) {
  return apiRequestData<ExpenseStandardListResponse>(
    `/api/expense-standards${toQueryString(query as Record<string, string | number | boolean | undefined>)}`,
  );
}

export async function createExpenseStandard(payload: CreateExpenseStandardPayload) {
  return apiRequestData<ExpenseStandard>("/api/expense-standards", {
    method: "POST",
    body: JSON.stringify(payload),
  });
}

export async function updateExpenseStandard(standardId: string, payload: UpdateExpenseStandardPayload) {
  return apiRequestData<ExpenseStandard>(`/api/expense-standards/${standardId}`, {
    method: "PATCH",
    body: JSON.stringify(payload),
  });
}

export async function deleteExpenseStandard(standardId: string) {
  return apiRequestData<ExpenseStandard>(`/api/expense-standards/${standardId}`, {
    method: "DELETE",
    body: JSON.stringify({}),
  });
}