import * as path from 'path'
import { Config } from './Config'

export interface SparkyFilePattern {
  isGlob: boolean
  root: string
  glob: string
  filepath: string
}

export interface SparkyFilePatternOptions {
  base?: string // Will be ignored when parsing absolute paths
}

export function parse(
  str: string,
  opts?: SparkyFilePatternOptions
): SparkyFilePattern {
  const base = opts ? opts.base || '' : ''
  const isGlob = /[*{}}]/.test(str)
  const isAbsolutePath = path.isAbsolute(str)
  let root
  let filepath
  let glob
  if (!isGlob) {
    root = isAbsolutePath
      ? path.dirname(str)
      : path.join(Config.PROJECT_ROOT, base)
    filepath = isAbsolutePath
      ? path.normalize(str)
      : path.join(Config.PROJECT_ROOT, base, str)
  } else if (isAbsolutePath) {
    root = path.normalize(str.split('*')[0])
    glob = path.normalize(str)
  } else {
    glob = path.join(Config.PROJECT_ROOT, base, str)
    root = path.join(Config.PROJECT_ROOT, base)
  }

  return {
    isGlob,
    root,
    glob,
    filepath
  }
}