let output = document.getElementById("output");
let input;
let linesArr;
let parsedArr = [];
let cmdArr = [];

function readFile(input) {
  let file = input.files[0]; 
  let fileReader = new FileReader();
  fileReader.readAsText(file); 
  fileReader.onload = function() {
    input = fileReader.result;
    linesArr = input.split("\n");
  }; 
  fileReader.onerror = function() {
    alert(fileReader.error);
  }; 
}

let start = document.getElementById("start");
start.addEventListener("mouseover", () => {
  start.innerHTML = "pwease pwess mee hawwd mastaaa! ~^o^~"
});
start.addEventListener("mouseout", () => {
  start.innerHTML = "sowwy mastaa! Ow0;"
});
start.addEventListener("click", () => {
  parseArr(); 
  parseCmd();
  for(let i=0; i<cmdArr.length; i++) {
    move(cmdArr[i][0], cmdArr[i][1], cmdArr[i][2]);
  }
  let answer = "";
  for(let i=0; i<parsedArr.length; i++) {
    answer += parsedArr[i][getTopPos(i)];
  }
  console.log("parsedArr after move()", parsedArr);
  console.log("ANSWER UwU", answer);
});

function parseArr() { //parsing is hard
  let stackArr = [];
  let cleanArr = [];
  
  for(let l=0; l<9; l++) {
    let tmpLine = [];
    for(let i=0; i<linesArr[l].length; i++) {
      if(linesArr[l].charAt(i)=='[') tmpLine[i+1] = linesArr[l].charAt(i+1);
      if(l==8) {
        if(typeof(parseInt(linesArr[l].charAt(i)))=="number") tmpLine[i] = linesArr[l].charAt(i);
        if(tmpLine[i] == ' ') tmpLine[i]=undefined;
      }
    }
    stackArr[l] = tmpLine;
  }
  console.log("stackArr", stackArr);
  
  for(let i=0; i<stackArr.length; i++) {
    let tmpLine = [];  
    let c=0;
    for(let j=0; j<stackArr[i].length; j++) {
      if(stackArr[8][j]!=undefined) {
        tmpLine[c] = stackArr[i][j]
        c++;
      }
    }
    cleanArr[i] = tmpLine;
  }
  console.log("cleanArr", cleanArr);
  
  for(let i=0; i<cleanArr.length-1; i++) {
    tmpLine = [];
    let c=7;
    for(let j=0; j<8; j++) {
       if(cleanArr[j][i] != undefined) {
         tmpLine[c] = cleanArr[j][i];
       }
       c--;
    }
    parsedArr[i] = tmpLine;
  }
  console.log("parsedArr", parsedArr);
}

function move(a, s, d) {
  for(let i=0; i<a; i++) {
    parsedArr[d-1][getTopPos(d-1)] = parsedArr[s-1][getTopPos(s-1)];
  }
}

function getTopPos(s) {
  let o=0;
  for(let i=0; i<parsedArr[s].length; i++) {
    if(parsedArr[s][i]==undefined) {
      o=i-1;
      break;
    }
  }
  return o;
}

function parseCmd() {
  for(let i=10; i<linesArr.length; i++) {
    let tmpLine = [];
    let tmpBool = true;
    for(let j=0; j<linesArr[i].length; j++) {
      if(linesArr[i].charAt(j)=='m' && tmpBool) {
          let tmp = 1;
          tmpBool = false;
          if(linesArr[i][j+1]!=' ') tmp = 2 
          tmpLine[tmpLine.length] = linesArr[i].substr(j+5,tmp);
      }
      if(linesArr[i].charAt(j)=='f') tmpLine[tmpLine.length] = linesArr[i].substr(j+5,1);
      if(linesArr[i].charAt(j)=='t') tmpLine[tmpLine.length] = linesArr[i].substr(j+3,1);
    }
    cmdArr[i-10] = tmpLine;
  }
  console.log("cmdArr", cmdArr);
}