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// Copyright (c) 2022-2023 Cloudflare, Inc.
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// Licensed under the Apache 2.0 license found in the LICENSE file or at:
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//     https://opensource.org/licenses/Apache-2.0
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export type ParameterNamesData = Record<
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  /* fullyQualifiedParentName */ string,
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  Record</* functionName */ string, string[] | undefined> | undefined
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>;
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let data: ParameterNamesData | undefined;
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export function installParameterNames(newData: ParameterNamesData): void {
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  data = newData;
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}
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const reservedKeywords = ["function", "number", "string"];
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export function getParameterName(
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  fullyQualifiedParentName: string,
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  functionName: string,
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  index: number
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): string {
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  // `constructor` is a reserved property name
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  if (functionName === "constructor") functionName = `$${functionName}`;
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  const name = data?.[fullyQualifiedParentName]?.[functionName]?.[index];
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  if (name === undefined) return `param${index}`;
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  if (reservedKeywords.includes(name)) return `$${name}`;
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  return name;
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}