const numbers=['1️⃣','2️⃣','3️⃣','4️⃣','5️⃣','6️⃣','7️⃣','8️⃣']
const iDevise=navigator.platform.match(/^iP/)
const feedback=document.querySelector('.feedback')
var Game=function(cols,rows,number_of_bombs,set,usetwemoji){this.number_of_cells=cols*rows
this.map=document.getElementById('map')
this.cols=Number(cols)
this.rows=Number(rows)
this.number_of_bombs=Number(number_of_bombs)
this.rate=number_of_bombs/this.number_of_cells
this.emojiset=set
this.numbermoji=[this.emojiset[0]].concat(numbers)
this.usetwemoji=usetwemoji||false
this.init()}
Game.prototype.init=function(){this.prepareEmoji()
if(this.number_of_cells>2500){alert('too big, go away, have less than 2500 cells');return false}
if(this.number_of_cells<=this.number_of_bombs){alert('more bombs than cells, can\'t do it');return false}
var that=this
this.moveIt(true)
this.map.innerHTML=''
var grid_data=this.bomb_array()
function getIndex(x,y){if(x>that.cols||x<=0)return-1
if(y>that.cols||y<=0)return-1
return that.cols*(y-1)+x-1}
var row=document.createElement('div')
row.setAttribute('role','row')
grid_data.forEach(function(isBomb,i){var cell=document.createElement('span')
cell.setAttribute('role','gridcell')
var mine=that.mine(isBomb)
var x=Math.floor((i+1)%that.cols)||that.cols
var y=Math.ceil((i+1)/that.cols)
var neighbors_cords=[[x,y-1],[x,y+1],[x-1,y-1],[x-1,y],[x-1,y+1],[x+1,y-1],[x+1,y],[x+1,y+1]]
if(!isBomb){var neighbors=neighbors_cords.map(function(xy){return grid_data[getIndex(xy[0],xy[1])]})
mine.mine_count=neighbors.filter(function(neighbor_bomb){return neighbor_bomb}).length}
mine.classList.add('x'+x,'y'+y)
mine.neighbors=neighbors_cords.map(function(xy){return `.x${xy[0]}.y${xy[1]}`})
cell.appendChild(mine)
row.appendChild(cell)
if(x===that.cols){that.map.appendChild(row)
row=document.createElement('div')
row.setAttribute('role','row')}})
this.resetMetadata()
this.bindEvents()
this.updateBombsLeft()}
Game.prototype.bindEvents=function(){var that=this
var cells=document.getElementsByClassName('cell')
Array.prototype.forEach.call(cells,function(target){target.addEventListener('click',function(evt){if(!target.isMasked||target.isFlagged)return
if(document.getElementsByClassName('unmasked').length===0){that.startTimer()
if(target.isBomb){that.restart(that.usetwemoji)
var targetClasses=target.className.replace('unmasked','')
document.getElementsByClassName(targetClasses)[0].click()
return}}
if(evt.view)that.moveIt()
target.reveal()
that.updateFeedback(target.getAttribute('aria-label'))
if(target.mine_count===0&&!target.isBomb){that.revealNeighbors(target)}
that.game()})
target.addEventListener('dblclick',function(){if(target.isFlagged)return
that.moveIt()
target.reveal()
that.revealNeighbors(target)
that.game()})
target.addEventListener('contextmenu',function(evt){var emoji
evt.preventDefault()
if(!target.isMasked){return}
if(target.isFlagged){target.setAttribute('aria-label','Field')
that.updateFeedback('Unflagged as potential bomb')
emoji=that.emojiset[3].cloneNode()
target.isFlagged=false}else{target.setAttribute('aria-label','Flagged as potential bomb')
that.updateFeedback('Flagged as potential bomb')
emoji=that.emojiset[2].cloneNode()
target.isFlagged=true}
target.childNodes[0].remove()
target.appendChild(emoji)
that.updateBombsLeft()})
if(iDevise){target.addEventListener('touchstart',function(evt){that.holding=setTimeout(function(){target.dispatchEvent(new Event('contextmenu'))},500)})
target.addEventListener('touchend',function(evt){clearTimeout(that.holding)})}})
window.addEventListener('keydown',function(evt){if(evt.key=='r'||evt.which=='R'.charCodeAt()){that.restart(that.usetwemoji)}})}
Game.prototype.game=function(){if(this.result)return
var cells=document.getElementsByClassName('cell')
var masked=Array.prototype.filter.call(cells,function(cell){return cell.isMasked})
var bombs=Array.prototype.filter.call(cells,function(cell){return cell.isBomb&&!cell.isMasked})
if(bombs.length>0){Array.prototype.forEach.call(masked,function(cell){cell.reveal()})
this.result='lost'
this.showMessage()}else if(masked.length===this.number_of_bombs){Array.prototype.forEach.call(masked,function(cell){cell.reveal(true)})
this.result='won'
this.showMessage()}}
Game.prototype.restart=function(usetwemoji){clearInterval(this.timer)
this.result=false
this.timer=false
this.usetwemoji=usetwemoji
this.init()}
Game.prototype.resetMetadata=function(){document.getElementById('timer').textContent='0.00'
document.querySelector('.wrapper').classList.remove('won','lost')
document.querySelector('.result-emoji').textContent=''
document.querySelector('.default-emoji').innerHTML=this.usetwemoji?twemoji.parse('😀'):'😀'
document.querySelector('.js-settings').innerHTML=this.usetwemoji?twemoji.parse('🔧'):'🔧'}
Game.prototype.startTimer=function(){if(this.timer)return
this.startTime=new Date()
this.timer=setInterval(function(){document.getElementById('timer').textContent=((new Date()-game.startTime)/1000).toFixed(2)},100)}
Game.prototype.mine=function(bomb){var that=this
var base=document.createElement('button')
base.type='button'
base.setAttribute('aria-label','Field')
base.className='cell'
base.appendChild(this.emojiset[3].cloneNode())
base.isMasked=true
if(bomb)base.isBomb=true
base.reveal=function(won){var emoji=base.isBomb?(won?that.emojiset[2]:that.emojiset[1]):that.numbermoji[base.mine_count]
var text=base.isBomb?(won?"Bomb discovered":"Boom!"):(base.mine_count===0?"Empty field":base.mine_count+" bombs nearby")
this.childNodes[0].remove()
this.setAttribute('aria-label',text)
this.appendChild(emoji.cloneNode())
this.isMasked=false
this.classList.add('unmasked')}
return base}
Game.prototype.revealNeighbors=function(mine){var neighbors=document.querySelectorAll(mine.neighbors)
for(var i=0;i<neighbors.length;i++){if(neighbors[i].isMasked&&!neighbors[i].isFlagged){neighbors[i].reveal()
if(neighbors[i].mine_count===0&&!neighbors[i].isBomb){this.revealNeighbors(neighbors[i])}}}}
Game.prototype.prepareEmoji=function(){var that=this
function makeEmojiElement(emoji){var ele
if(that.usetwemoji){if(emoji.src){ele=emoji}else{ele=document.createElement('img')
ele.className='emoji'
ele.setAttribute('aria-hidden','true')
ele.src=twemoji.parse(emoji).match(/src=\"(.+)\">/)[1]}}else{ele=document.createTextNode(emoji.alt||emoji.data||emoji)}
return ele}
this.emojiset=this.emojiset.map(makeEmojiElement)
this.numbermoji=this.numbermoji.map(makeEmojiElement)}
Game.prototype.bomb_array=function(){var chance=Math.floor(this.rate*this.number_of_cells)
var arr=[]
for(var i=0;i<chance;i++){arr.push(true)}
for(var n=0;n<(this.number_of_cells-chance);n++){arr.push(false)}
return this.shuffle(arr)}
Game.prototype.shuffle=function(array){var currentIndex=array.length,temporaryValue,randomIndex
while(currentIndex!==0){randomIndex=Math.floor(Math.random()*currentIndex)
currentIndex-=1
temporaryValue=array[currentIndex]
array[currentIndex]=array[randomIndex]
array[randomIndex]=temporaryValue}
return array}
Game.prototype.moveIt=function(zero){zero?this.moves=0:this.moves++
document.getElementById('moves').textContent=this.moves}
Game.prototype.updateBombsLeft=function(){var flagged=Array.prototype.filter.call(document.getElementsByClassName('cell'),function(target){return target.isFlagged})
document.getElementById('bombs-left').textContent=`${this.number_of_bombs-flagged.length}/${this.number_of_bombs}`}
Game.prototype.updateFeedback=function(text){feedback.textContent=text
if(this.feedbackToggle)feedback.textContent+="."
this.feedbackToggle=!this.feedbackToggle}
Game.prototype.showMessage=function(){clearInterval(this.timer)
var seconds=((new Date()-this.startTime)/1000).toFixed(2)
var winner=this.result==='won'
var emoji=winner?'😎':'😵'
this.updateFeedback(winner?"Yay, you won!":"Boom! you lost.")
document.querySelector('.wrapper').classList.add(this.result)
document.getElementById('timer').textContent=seconds
document.getElementById('result').innerHTML=this.usetwemoji?twemoji.parse(emoji):emoji}
console.log('Use: `new Game(cols, rows, bombs, [emptyemoji, bombemoji, flagemoji, starteremoji], twemojiOrNot)` to start a new game with customizations.')
console.log(' Eg: `game = new Game(10, 10, 10, ["🌱", "💥", "🚩", "◻️"], false)`')
console.log(' Or: `game = new Game(16, 16, 30, ["🐣", "💣", "🚧", "◻️"], true)`')