Arena Fight

gistfile1.txt

/*****************************************************************************
  Defeat the enemy hero in a duel!
*****************************************************************************/
var SELF = this;
SELF.ATTACK = function (enemy, xE, yE) {
    if (SELF.distanceTo(enemy) <= 7) {
        SELF.attack(enemy);
    } else {
        if (isApproaching(enemy)) {
            SELF.shield();
        } else {
            var increment = nextStepTo({x: xE, y: yE});
            if (increment) {
               SELF.moveXY(SELF.pos.x + increment.x, SELF.pos.y + increment.y);
            } else {
                SELF.shield();
            }
        }
    }
};
/*****************************************************************************
  OBSERVE
*****************************************************************************/
var enemy = SELF.findNearestEnemy();
/*****************************************************************************
  PATTERNS
*****************************************************************************/
var oldDistance;
function isExplosion (distance) {
  // @TODO: needs more sophesticated logic
  //   1. check if enemy is very close
  //   2. check if he moves away very fast
  if (1 + oldDistance >= distance) {
    oldDistance = distance;
    return false;
  } else {
    oldDistance = distance;
    return true;
  }
}
function isApproaching(enemy) {
    var distance = SELF.distanceTo(enemy);
      if (oldDistance > distance) {
    oldDistance = distance;
    return true;
  } else {
    oldDistance = distance;
    return false;
  }
}
function nextStepTo (target) {
    var xE = target.x;
    var yE = target.y;
    var dX = (xE - xS);
    var dY = (yE - yS);
    if (dX !== 0) {
        var m =  dY / dX; // slope
        var d = Math.sqrt(dX*dX + dY*dY);
        if (d > 1) {
            var addX = dX / d;
            var addY = dY / d;
            return { x: addX, y: addY };
        } else {  // target is very close
            return null;
        }
    } else if (dY < -1 ) { // target is south
        return { x: 0, y: 1 };
    } else if (dY > 1 ) {  // target is north
        return { x: 0, y: -1 };
    } else {  // target is very close
        return null;
    }
}
function go (nextIncrement) {
    SELF.moveXY(SELF.pos.x+nextIncrement.x, SELF.pos.y+nextIncrement.y);
}
function walk (next) {
    SELF.moveXY(next.x, next.y);
}
function isTrapped(enemy) {
    var x = enemy.pos.x;
    var y = enemy.pos.y;
    var TRAPSFIELD = [{x: 59, y: 24},{x: 62, y: 15}];
    var inXrange = (TRAPSFIELD[0].x < x) && (x < TRAPSFIELD[1].x);
    var inYrange = (TRAPSFIELD[0].y > y) && (y > TRAPSFIELD[1].y);
    if (inXrange && inYrange) {
        return true;
    } else {
        return false;
    }
}
/*****************************************************************************
  ORIENT
*****************************************************************************/
var MODES = {
    OPEN    : 1,
    ATTACK  : 2,
    MOVE    : 3,
    DEFEND  : 4
};
var MODE = MODES.OPEN;
/*****************************************************************************
  ACTIONS
*****************************************************************************/
// var opening2  = [
//     {x: 17, y: 42},{x: 15, y: 47},{x: 14, y: 51},{x: 10, y: 51}
// ];
var step    = 0;
var opening = [
    {x: 58, y: 13},{x: 64, y: 14},{x: 68, y: 14},
    {x: 70, y: 24},
    {x: 54, y: 31},{x: 15, y: 44},{x: 10, y: 50}
];
var justgo   = false;
var oldStep;
var strategy = [
    {x: 15, y: 44},{x: 63, y: 24},{x: 66, y: 19},
    {x: 65, y: 12},{x: 9, y: 11}
];
var wait = 0;
var Eold = {};
/*****************************************************************************
  DECIDE
*****************************************************************************/
SELF.moveXY(40, 32);
loop {
    enemy = SELF.findNearestEnemy();
    if (enemy && enemy.type === 'potion-master') {
        SELF.attack(enemy);
    } else if (enemy) {
        var xE = enemy.pos.x;
        var yE = enemy.pos.y;
        var xS = SELF.pos.x;
        var yS = SELF.pos.y;
        /*********************************************************************
            MODE: OPEN
        *********************************************************************/
        if (MODE === MODES.OPEN) {
            var myX   = SELF.pos.x;
            var myY   = SELF.pos.y;
            var next = opening[step];
            var dist = SELF.distanceTo(enemy);
            var Epos = {x:xE, y:yE};
            var isFollowing = Epos.x !== Eold.x && Epos.y != Eold.y || step < 4;
            Eold = Epos;
            var isFrozen    = oldDistance === dist;
            if (next) {
                if (step === 1) {
                    if (SELF.distanceTo(enemy) > 8) {
                        SELF.shield();
                    } else {
                        walk(next);
                        step ++;
                    }
                } else if (isFollowing || isTrapped(enemy)) {
                    if (oldStep !== step) {
                        walk(next);
                    }
                    oldStep = step;
                    if (step === 2 && SELF.distanceTo(enemy) < 10) {
                        step++;
                    } else if (wait > 20) {
                        step++;
                    }  else if (step === 2 && !isFrozen) {
                        SELF.shield();
                        wait++;
                    } else {
                        step++;
                    }
                } else if (isFrozen) {
                    SELF.attack(enemy);
                } else {
                    SELF.attack(enemy);
                }
            } else {
                oldDistance = SELF.distanceTo(enemy);
                step = 0;
                MODE = MODES.MOVE; // RE-ORIENT
            }
        /*********************************************************************
            MODE: STRATEGY
        *********************************************************************/
        } else if (MODE === MODES.MOVE) {
            justgo = false;
            if (isExplosion(SELF.distanceTo(enemy))) {
                for(var k=0; k<strategy.length;) {
                    if (k===3 && !justgo) {
                        dist = SELF.distanceTo(enemy);
                        if (dist < 10) {
                            justgo = true;
                        } else if (wait > 60) {
                            justgo = true;
                        } else {
                            SELF.shield();
                            wait++;
                        }
                    } else {
                        SELF.moveXY(strategy[k].x, strategy[k].y);
                        k++;
                    }
                }
                MODE = MODES.ATTACK; // RE-ORIENT
            } else {
                SELF.shield();
            }
        /*********************************************************************
            MODE: ATTACK
        *********************************************************************/
        } else if (MODE === MODES.ATTACK) {
          SELF.ATTACK(enemy, xE, yE);
        /*********************************************************************
            MODE: DEFEND
        *********************************************************************/
        } else if (MODE === MODES.DEFEND) {
            SELF.shield();
        }
    }
}