let intervalTime = 150;

let terminal:HTMLElement = <HTMLElement> document.getElementsByClassName("terminal")[0];
let historyContainer:HTMLElement = <HTMLElement> terminal.getElementsByClassName("history")[0];
let promptContainer:HTMLElement = <HTMLElement> terminal.getElementsByClassName("prompt")[0];

let dataIndex = 0;
let stringPosition = 0;
let printTask: number;

function writeOut() {

   // @ts-ignore
   let currentData: { [key: string]: string } = data[dataIndex];
   let currentText: string = currentData["strings"];
   promptContainer.innerText = promptContainer.innerText + currentText.charAt(stringPosition);
   stringPosition++;
   if(stringPosition > currentText.length){
      stringPosition = 0
      dataIndex++;
      historyContainer.innerHTML = historyContainer.innerHTML + "$&nbsp;" + promptContainer.innerHTML + "<br><span class=\"gray\">" + currentData["output"] + "</span><br><br>";
      promptContainer.innerHTML = "";
      clearInterval(printTask);
      // @ts-ignore
      if(dataIndex < data.length){
         // @ts-ignore
         setTimeout(startNewTask, data[dataIndex - 1].postDelay);
      }
   }

}

function startNewTask() {
   printTask = setInterval(writeOut, intervalTime);
}

startNewTask();