/**
 * @class NPC - Non-Player Character
 * @augments RPG.Beings.BaseBeing
 */
RPG.Beings.NPC = OZ.Class().extend(RPG.Beings.BaseBeing);
RPG.Beings.NPC.factory.ignore = true;

RPG.Beings.NPC.prototype.init = function(race) {
	this.parent(race);
	this._confirm = RPG.CONFIRM_NA;
	this._ai = new RPG.AI(this);
	this._alignment = RPG.ALIGNMENT_NEUTRAL;
}

RPG.Beings.NPC.prototype.getAI = function() {
	return this._ai;
}

RPG.Beings.NPC.prototype.setAI = function(ai) {
	if (this._ai) { this._ai.die(); }
	this._ai = ai;
	return this;
}

/**
 * NPC delegates decisions to its AI
 */
RPG.Beings.NPC.prototype.yourTurn = function() {
	return this._ai.yourTurn();
}

RPG.Beings.NPC.prototype.randomGender = function() {
	if (Math.randomPercentage() < 34) {
		this.setGender(RPG.GENDER_FEMALE);
		this.adjustFeat(RPG.FEAT_STRENGTH, -2);
		this.adjustFeat(RPG.FEAT_MAGIC, 2);
	} else {
		this.setGender(RPG.GENDER_MALE);
	}
}

RPG.Beings.NPC.prototype.setAlignment = function(a) {
	this._alignment = a;
	this._ai.syncWithAlignment();
	return this;
}

RPG.Beings.NPC.prototype.getAlignment = function() {
	return this._alignment;
}

RPG.Beings.NPC.prototype.die = function() {
	this._ai.die();
	this.parent();
}

RPG.Beings.NPC.prototype.getConfirm = function() {
	return this._confirm;
}

RPG.Beings.NPC.prototype.setConfirm = function(confirm) {
	this._confirm = confirm;
	return this;
}


/**
 * Display a prompt asking for confirmation
 * @returns {bool} Whether we can continue
 */
RPG.Beings.NPC.prototype.confirmAttack = function() {
	if (this._confirm == RPG.CONFIRM_ASK) {
		var result = confirm(RPG.Misc.format("Really attack %d?", this));
		if (!result) { return false; }
		this.setConfirm(RPG.CONFIRM_DONE);
	}
	return true;
}


/**
 * Takes gender and name into account
 * @see RPG.Visual.IVisual#describe
 */
RPG.Beings.NPC.prototype.describe = function() {
	var s = this._description;
	if (this._gender == RPG.GENDER_FEMALE) { s = "female "+s; }
	if (this._name) { s = this._name + " the " + s.capitalize(); }
	return s;
}

/**
 * Takes name into account
 * @see RPG.Visual.IVisual#describeA
 */
RPG.Beings.NPC.prototype.describeA = function() {
	if (this._name) { 
		return this.describe();
	} else {
		return this.parent();
	}
}

/**
 * Takes name into account
 * @see RPG.Visual.IVisual#describeThe
 */
RPG.Beings.NPC.prototype.describeThe = function() {
	if (this._name) { 
		return this.describe();
	} else {
		return this.parent();
	}
}

/**
 * @see RPG.Visual.IVisual#describeIs
 */
RPG.Beings.NPC.prototype.describeIs = function() {
	return "is";
}

RPG.Beings.NPC.prototype.teleport = function(cell) {
	var pc = RPG.Game.pc;
	
	if (pc.canSee(this._cell)) {
		var s = RPG.Misc.format("%A suddenly disappears!", this);
		RPG.UI.buffer.message(s);
	}
	
	if (pc.canSee(cell)) {
		if (pc.canSee(this._cell)) {
			var s = RPG.Misc.format("%The immediately reappears!", this);
		} else {
			var s = RPG.Misc.format("%A suddenly appears from nowhere!", this);
		}
		RPG.UI.buffer.message(s);
	}
	
	this.parent(cell);
}

/**
 * NPCs just cheat. They can see everything in their sight range...
 */
RPG.Beings.NPC.prototype.canSee = function(cell) {
	return cell.getCoords().distance(this._cell.getCoords()) <= this.getFeat(RPG.FEAT_SIGHT_RANGE);
}

/* ------------------------- ACTIONS -----------------*/

RPG.Beings.NPC.prototype.move = function(targetCell) {
	var sourceCell = this._cell;

	var result = this.parent(targetCell);

	if (sourceCell) { RPG.UI.map.redrawCell(sourceCell); }
	if (targetCell) { RPG.UI.map.redrawCell(targetCell); }
	
	return result;
}

/**
 * Initiate chat with target being
 */
RPG.Beings.NPC.prototype.chat = function(being) {
	return RPG.UI.dialog.show(this.getAI(), being);
}

/* ------------------ PRIVATE --------------- */

RPG.Beings.NPC.prototype._describeLaunch = function(projectile, target) {
	var launcher = projectile.getLauncher();
	var verb = (launcher ? "shoots" : "throws");
	
	var s = RPG.Misc.format("%A %s %a", this, verb, projectile);
	if (target.getBeing()) {
		s += RPG.Misc.format(" at %d", target.getBeing());
	}
	
	s += ".";
	RPG.UI.buffer.message(s);
}

RPG.Beings.NPC.prototype._describeAttack = function(hit, damage, kill, being, slot) {
	if (!hit) {
		var s = RPG.Misc.format("%The misses %a.", this, being);
		RPG.UI.buffer.message(s);
		return;
	}
	
	if (!damage) {
		var s = RPG.Misc.format("%The fails to hurt %a.", this, being);
		RPG.UI.buffer.message(s);
		return;
	}
	
	var s = RPG.Misc.format("%The hits %a", this, being);
	if (kill) {
		s += RPG.Misc.format(" and kills %him.", being);
	} else {
		if (being == RPG.Game.pc) {
			s += ".";
		} else {
			s+= RPG.Misc.format(" and %s wounds %him.", being.woundedState(), being);
		}
	}
	
	RPG.UI.buffer.message(s);
}