import plistModule from '@expo/plist'

function isRecord(value: unknown): value is Record<string, unknown> {
  return typeof value === 'object' && value !== null && !Array.isArray(value)
}

function resolvePlistParser(value: unknown): ((source: string) => unknown) | null {
  if (!isRecord(value)) return null
  const direct = value.parse
  if (typeof direct === 'function') {
    return (source) => Reflect.apply(direct, value, [source])
  }
  const nested = value.default
  if (!isRecord(nested)) return null
  const nestedParse = nested.parse
  return typeof nestedParse === 'function'
    ? (source) => Reflect.apply(nestedParse, nested, [source])
    : null
}

// bun consumes @expo/plist's default export directly, while the compiled commonjs
// scanner receives the package namespace with that export nested under default.
const parsePlist = resolvePlistParser(plistModule)

export function parsePlistSource(source: string): unknown {
  return parsePlist?.(source) ?? null
}