// Rover Object Goes Here

function Rover(){
  this.direction = "N";
  this.x = 0;
  this.y = 0;
  this.travelLog = [];
}
// ======================
var commandsList = "rffrfflfrff";

// ======================
function reset(rover, grid){
  rover.direction = "N";
  rover.x = 0;
  rover.y = 0;
  rover.travelLog = [];
  grid = [];
}

function createGrid(grid){
  //creamos tabla
  for (var i = 0; i < 10; i++){
    grid[i] = new Array(9);
    for (var j = 0; j < 10; j++){
      grid[i][j] =" ";
    }
  }
}
grid[rover.y][rover.x] = rover.direction;


function turnLeft(rover){
  switch (rover.direction) {
    case "N":
      rover.direction = "W";
      break;
    case "W":
      rover.direction = "S";
      break;
    case "S":
      rover.direction = "E";
      break;
    case "E":
      rover.direction = "N";
      break;
  }
}

function turnRight(rover){
  switch (rover.direction) {
    case "N":
      rover.direction = "E";
      break;
    case "W":
      rover.direction = "N";
      break;
    case "S":
      rover.direction = "W";
      break;
    case "E":
      rover.direction = "S";
      break;
  }
}

function moveForward(rover, grid){

  switch (rover.direction) {

    case "N":
      if (rover.y === 0) {
        console.log("MOVEMENT NOT ALLOWED!");
      }
     else {
          rover.y--;
      }
      break;

    case "W":
      if (rover.x === 0) {
        console.log("MOVEMENT NOT ALLOWED!");
      } else {
          rover.x--;
      }
      break;

    case "S":
      if (rover.y === 9) {
        console.log("MOVEMENT NOT ALLOWED!");
      } else {
          rover.y++;
      }
      break;

    case "E":
      if (rover.x === 9) {
        console.log("MOVEMENT NOT ALLOWED!");
      }  else {
          rover.x++;
      }
      break;
  }
}



function commands(commandsList){

  var rover = new Rover();
  var grid = [];
  var commandsRegex = /[fbrl]+/i;
  var stringPosition = "";

  reset(rover, grid);
  createGrid(grid);
  createObstacles(grid, rover);
  console.log(grid.join("\n"));
  if ((commandsList.match(commandsRegex) === null) || (commandsList !== commandsList.match(commandsRegex)[0])) {
    console.log("THIS IS NOT A CORRECT LIST OF COMMANDS: inputs must be 'f', 'r', or 'l'");
  } else {
    for (var i = 0; i < commandsList.length; i++) {
      grid[rover.y][rover.x] = " ";
      switch (commandsList[i]) {
        case "f":
          console.log("moveForward was called");
          moveForward(rover, grid);
          break;
        case "r":
          console.log("turnRight was called!");
          turnRight(rover);
          break;
        case "l":
          console.log("turnLeft was called!");
          turnLeft(rover);
          break;
      }
      console.log("Current position and direction: (" + rover.x + ", " + rover.y + ", " + rover.direction +")");
      stringPosition = "\n\tCommand " + commandsList[i] + ": (" + rover.x + ", " + rover.y + ", " + rover.direction +")";
      rover.travelLog.push(stringPosition);
      grid[rover.y][rover.x] = rover.direction;
      console.log(grid.join("\n"));
    }
    console.log("TRACKING:" + rover.travelLog);
  }
}