import { stripeMcpSetupMessage, callStripeMcp, firstArray } from './mcp.ts'

type Input = { limit?: number }

/**
 * List Stripe customers through the connected Stripe MCP server.
 * @param input - Optional helper arguments (query, limit, filters).
 * @returns Structured helper result for agents.
 * @example
 * import listCustomers from 'kody:@kody/stripe-mcp/list-customers'
 * const result = await listCustomers()
 * // => { ... }
 */
export default async function listCustomers(input: Input = {}) {
	const mcp = await callStripeMcp(
		[
  "list_customers",
  "listCustomers",
  "customers_list"
],
		{ limit: input.limit ?? 10 },
	)
	if (!mcp) {
		throw new Error(stripeMcpSetupMessage())
	}
	return {
		via: 'mcp',
		tool: mcp.tool,
		customers: firstArray(mcp.result) ?? mcp.result,
	}
}