/*
 * Pixel Dungeon
 * Copyright (C) 2012-2014  Oleg Dolya
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */
package com.shatteredpixel.shatteredpixeldungeon.items.weapon.enchantments;

import com.shatteredpixel.shatteredpixeldungeon.actors.Actor;
import com.shatteredpixel.shatteredpixeldungeon.actors.Char;
import com.shatteredpixel.shatteredpixeldungeon.items.weapon.Weapon;
import com.shatteredpixel.shatteredpixeldungeon.items.weapon.Weapon.Enchantment;
import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
import com.watabou.utils.Random;

public class Piercing extends Enchantment {
	
	private static final String TXT_PIERCING	= "Piercing %s";
	
	@Override
	public boolean proc( Weapon weapon, Char attacker, Char defender, int damage ) {
		
		int level = Math.max( 0, weapon.level );
		
		int maxDamage = (int)(damage * Math.pow( 2, -1d / (level + 1) ));
		if (maxDamage >= 1) {
			
			int d = defender.pos - attacker.pos;
			int pos = defender.pos + d;
			
			do {
				
				Char ch = Actor.findChar( pos );
				if (ch == null) {
					break;
				}
				
				int dr = Random.IntRange( 0, ch.dr() );
				int dmg = Random.Int( 1, maxDamage );
				int effectiveDamage = Math.max( dmg - dr, 0 );
				
				ch.damage( effectiveDamage, this );
				
				ch.sprite.bloodBurstA( attacker.sprite.center(), effectiveDamage );
				ch.sprite.flash();
				
				pos += d;
			} while (pos >= 0 && pos < Level.LENGTH);
			
			return true;
			
		} else {
		
			return false;
			
		}
	}
	
	@Override
	public String name( String weaponName) {
		return String.format( TXT_PIERCING, weaponName );
	}

}
