import { apiRequestData } from "./http";

export type BudgetControlRuleEntityType = "all" | "reimbursement" | "purchase_request" | "travel_request";
export type BudgetControlMode = "warn" | "block" | "manual_review";

export type BudgetControlRule = {
  id: string;
  name: string;
  entityType: BudgetControlRuleEntityType;
  departmentId: string | null;
  legalEntityId: string | null;
  costCenterId: string | null;
  expenseTypeId: string | null;
  controlMode: BudgetControlMode;
  priority: number;
  enabled: boolean;
  notes: string | null;
  archivedAt: string | null;
  createdAt: string | null;
  updatedAt: string | null;
};

export type BudgetControlRuleListResponse = {
  items: BudgetControlRule[];
};

function toQueryString(query: Record<string, string | 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" ? String(value) : value);
  }
  const encoded = params.toString();
  return encoded ? `?${encoded}` : "";
}

export async function fetchBudgetControlRules(query: {
  entityType?: BudgetControlRuleEntityType;
  enabled?: boolean;
} = {}) {
  return apiRequestData<BudgetControlRuleListResponse>(
    `/api/budget-control-rules${toQueryString(query as Record<string, string | boolean | undefined>)}`,
  );
}

export async function createBudgetControlRule(payload: {
  name: string;
  entityType: BudgetControlRuleEntityType;
  departmentId?: string | null;
  legalEntityId?: string | null;
  expenseTypeId?: string | null;
  controlMode: BudgetControlMode;
  priority?: number;
  enabled?: boolean;
  notes?: string | null;
}) {
  return apiRequestData<{ item: BudgetControlRule }>("/api/budget-control-rules", {
    method: "POST",
    body: JSON.stringify(payload),
  });
}

export async function patchBudgetControlRule(
  ruleId: string,
  payload: Partial<{
    name: string;
    entityType: BudgetControlRuleEntityType;
    departmentId: string | null;
    legalEntityId: string | null;
    expenseTypeId: string | null;
    controlMode: BudgetControlMode;
    priority: number;
    enabled: boolean;
    notes: string | null;
  }>,
) {
  return apiRequestData<{ item: BudgetControlRule }>(`/api/budget-control-rules/${ruleId}`, {
    method: "PATCH",
    body: JSON.stringify(payload),
  });
}

export async function archiveBudgetControlRule(ruleId: string) {
  return apiRequestData<{ item: BudgetControlRule }>(`/api/budget-control-rules/${ruleId}/archive`, {
    method: "POST",
    body: JSON.stringify({}),
  });
}