import chalk from 'chalk'
//import inquirer from 'inquirer'
import prompts from 'prompts'
import { selectRandom } from '../ao-lib/util.js'
import { greenChalk, theAO, theMenu, headerStyle } from './styles.js'

// Different sets of messages that can be randomly selected from
const welcomeMessages = [
  `You turn a corner and are suddenly back in the halls of ${theAO}.`,
  `You make the sign of ${theAO} and are whisked away on a gust of divine wind.`,
  `You take a closer look at the folder you are in and realize it is a room.`,
  `You draw an alchemical symbol and open a doorway into ${theAO}. You step through.`,
  `"Ah, there you are again!" The old man greets you as you step through the portal.`,
  `A line of doge-masked worshippers glide by. By the time you exit the trance, you are in ${theAO}. Doge bless.`,
  `You spraypaint an ${greenChalk.bold('A')} superimposed on an ${greenChalk.bold('O')} and step through the portal.`,
  `You receive a phone call. You answer it. You are in ${theAO}.`,
  `You dab fiercely, and when you raise your head, you are in ${theAO}.`,
  `A ship arrives and takes you out to sea. The ship sinks and you somehow wash up safely in ${theAO}.`,
  `You are reading in the Library when you find a strange book. Whatever you read next in the book is ${theAO}.`,
  `You plant a magic seed and it grows into a great tree. Climbing up into its branches, you know ${theAO} is here.`,
  `In the late afternoon, a warm sunbeam highlights motes of dust over your book. These motes are ${theAO}.`,
  `A black cat crosses your path. Most people wouldn't notice, but you know you have entered the AO.`,
  `Dipping your brush in ink, you draw a perfect circle. This is ${theAO}.`,
  `You are offered a choice between two pills. However, you have secretly built up an immunity to both pills, and trick your opponent into taking one. Inconceviably, you are in ${theAO}.`,
  `A young man with spiky hair and glowing skin appears before you in a halo of light. He guides you to ${theAO}.`,
  `Looking for a shortcut, you worm your way through through the hedges, and, after struggling through the brush, emerge into a sunny estate garden. You've found the AO.`,
  `You find a small animal burrow dug-out near the riverside. Crawling in, you find a network of caves that lead to ${theAO}.`,
  `You receive a handwritten letter in the mail, which reads, in fine calligraphy:, "Dear —, You are in ${theAO}."`,
  `An unexpected calm settles over you. The ${greenChalk.bold('AO')} is here: Here is ${theAO}.`,
  `You plant a seed, and from that one seed grow many trees. The forest and the tradition of tree-planting are ${theAO}.` 
]
const menuMessages = [
  `You see ${theMenu}:`,
  `A page of aged paper wafts into your hand. On it is written ${theMenu}:`,
  `A minstrel walks by playing a haunting melody, and in its harmonies you hear the refrain of ${theMenu}:`,
  `You pick up an apple from a nearby table and take a bite. You suddenly recall the words of ${theMenu}:`,
  `With a screeching sound, a page containing ${theMenu} slowly emerges, line-by-line, from a dot-matrix printer:`,
  `In the shadows cast in the cavernous space, you see the forms of ${theMenu}:`,
  `With a low hum, standing waves appear on the reflecting pool at your feet. Impossibly, they spell out ${theMenu}:`,
  `You see a box of candies labeled 'Eat Me'. Why not? you think. You find ${theMenu} printed on the wrapper:`,
  `You see an ornate bottle labeled 'Drink Me'. Why not? you think. You take a sip and shrink to the size of a doormouse. Now you can read ${theMenu} scratched into the wainscoating:`,
  `Cretaceous jungle plants tower overhead, overgrown from the safari room. The ancient fractals of the branches prefigure the structure of ${theMenu}:`,
]
const exclamationMessages = [
  'Woah there!',
  'Shiver me timbers!',
  'iNtErEsTiNg!',
  'Turing\'s ghost!',
  'Frack!',
  'Frell!',
  'Good grief!',
  'With great power comes great responsibility.',
]
const rogerMessages = [
  'You\'ve got it.',
  'Aye-aye, captain!',
  'The AO provides.',
  'Roger.',
  'Yokai.'
]
const farewellMessages = [
  'Goodbye!',
  'Goodbye! Goodbye! Goodbye...!',
  'The AO will always be with you.',
  'Please return soon; the AO needs your virtue.',
  'The AO will await your return.',
  'Doge bless.',
  'Please remember the AO throughout your day as a ward against evil.',
  'Remember your PrioriTEA™.',
  'Know thyself.',
  'With great power comes great responsibility.',
  'The AO is a state of mind.',
  'Go for the low-hanging fruit.',
]

// Prints a random RPG-style welcome message to contextualize the AO experience and the main menu
export async function welcome() {
  const randomWelcomeMessage = selectRandom(welcomeMessages)
  const randomMenuMessage = selectRandom(menuMessages)
  const welcomeMessage = ('  ' + randomWelcomeMessage + ' ' + randomMenuMessage).wordWrap(process.stdout.columns - 2)
  // todo: line breaks would be more accurate if there were a function to count the length of a string minus the formatting codes (regex)
  // right now the invisible formatting characters are counted so lines are wrapped early
  console.log('\n' + welcomeMessage)
  
}

// Returns a random exclamatory remark
export function exclaim() {
  return selectRandom(exclamationMessages)
}

// Returns a random obedient/affirmative remark denoting that a command was executed
export function roger() {
  return selectRandom(rogerMessages)
}

// Returns a random farewell message
export function farewell() {
  console.log(chalk.yellow.bold(selectRandom(farewellMessages)))
}

// Asks the given yes or no answer returns true or false for their response
export async function yesOrNo(prompt = 'Yes or no?', defaultAnswer = true) {
  const answer = await prompts({
    type: 'confirm',
    name: 'value',
    message: prompt,
    initial: defaultAnswer
  })
  return answer.value || 'ESC'
}

// Ask the user the given question and returns their textual response
export async function askQuestionText(prompt = 'Please enter a string:', promptOptions = {}) {
  let options = {
    type: 'text',
    name: 'value',
    message: prompt
  }
  Object.assign(options, promptOptions)
  const answer = await prompts(options)
  return answer.value || false
}

export async function promptMenu(choices, prompt = 'Please choose:', hint = '(Use arrow keys)', defaultValue = null, warningMessage = null, numbered = false) {
  if(prompt !== 'Please choose:') {
    prompt = `\n${headerStyle(prompt)}`
  }
  if(numbered) {
    const prependNumber = (num, str) => num + '. ' + str
    for(let i = 0; i < choices.length; i++) {
      if(typeof choices[i] === 'string') {
        choices[i] = prependNumber(i + 1, choices[i])
      } else if(typeof choices[i].title === 'string') {
        if(!choices[i].value) {
          choices[i].value = choices[i].title
        }
        choices[i].title = prependNumber(i + 1, choices[i].title)
      }
    }
  }
  console.log()
  const answer = await prompts({
    type: 'select',
    name: 'value',
    message: prompt,
    choices: choices,
    hint: hint,
    initial: defaultValue,
    warn: warningMessage
  })
  if(answer && Object.keys(answer).length === 0 && Object.getPrototypeOf(answer) === Object.prototype) {
    return false
  }
  if(typeof answer.value === 'string') {
    return answer.value
  }
  if(!isNaN(answer.value) && (answer.value < 0 || answer.value > choices.length) || answer.value === false) {
    return false
  } else if(isNaN(answer.value)) {
    return answer.value
  }
  const chosenOption = choices[answer.value].value || choices[answer.value].title
  if(!chosenOption) {
    return choices[answer.value]
  }
  return chosenOption 
}