'use strict'

module.exports = indentation

var tab = '\t'
var space = ' '

var spaceSize = 1
var tabSize = 4

// Gets indentation information for a line.
function indentation(value) {
  var index = 0
  var indent = 0
  var character = value.charAt(index)
  var stops = {}
  var size
  var lastIndent = 0

  while (character === tab || character === space) {
    size = character === tab ? tabSize : spaceSize

    indent += size

    if (size > 1) {
      indent = Math.floor(indent / size) * size
    }

    while (lastIndent < indent) {
      stops[++lastIndent] = index
    }

    character = value.charAt(++index)
  }

  return {indent: indent, stops: stops}
}