/** Used as references for various `Number` constants. */
const MAX_SAFE_INTEGER = 9007199254740991

/* Built-in method references for those with the same name as other `lodash` methods. */
const nativeFloor = Math.floor

/**
 * The base implementation of `repeat` which doesn't coerce arguments.
 *
 * @private
 * @param {string} string The string to repeat.
 * @param {number} n The number of times to repeat the string.
 * @returns {string} Returns the repeated string.
 */
function baseRepeat(string, n) {
  let result = ''
  if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
    return result
  }
  // Leverage the exponentiation by squaring algorithm for a faster repeat.
  // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
  do {
    if (n % 2) {
      result += string
    }
    n = nativeFloor(n / 2)
    if (n) {
      string += string
    }
  } while (n)

  return result
}

export default baseRepeat