import { store } from 'app/store'

export const getSection = index => {
  const { sections } = store.getState().viewer
  return sections[index]
}

export const getNextSection = section => {
  const { sections } = store.getState().viewer
  if (section.index === sections.length - 1) {
    return null
  }
  return sections[section.index + 1]
}

export const parseCredits = lines => {
  let sections = []
  let current
  lines.split("\n").forEach((s, i) => {
    if (s[0] === "#") {
      current = {
        title: s.replace("#", "").trim(),
        lines: [],
        i
      }
      sections.push(current)
    } else {
      current.lines.push(s.trim())
    }
  })
  return sections
}

export const groupColumns = (lines, cols) => {
  const perColumn = Math.floor(lines.length / cols)
  const columns = []
  for (let i = 0; i < cols; i++) {
    columns.push(lines.slice(i * perColumn, (i+1) * perColumn))
  }
  return columns
}