// declaration
int VIP_HP[2], VIP_ID[2];

// initialization
VIP_HP[0] = VIP_HP[1] = 1000;
VIP_ID[0] = VIP_ID[1] = -1;

// AI update in rule vip type 0
void AI_OnUpdate_VIP_0(int id)
{	
	int chara_hp = GetCharaAttrib(id, CHARA_HP);
	int team = GetCharaAttrib(id, CHARA_TEAM) - 1;		// team = 0, means team A, team = 1, means team B	
	int s = GetNumCharas();
	int deadfriend = 0;
	int friend = 0;
	int enemy = 0;
	int c;
		
	// get team statistic
	for(int i = 0 ; i < s ; ++i)
	{
		c = GetChara(i);
		if (GetCharaAttrib(c, CHARA_TEAM)-1 != team)
		{
			enemy++;
			continue;
		}
		friend++;
		if (IsCharaDead(c))
			deadfriend++;
	}
				
	if(IsCharaVIP(id))
	{
		// this is vip, when HP < 200, run dodge
		VIP_HP[team] = chara_hp;
		VIP_ID[team] = id;

		if(chara_hp < 200 && friend - deadfriend > 1 && GetAIPerformFunc(id) != AI_PERFORM_DODGE)
		{
			// dodge
			AIPerform(id, AI_PERFORM_NONE);
			AIPerform(id, AI_PERFORM_DODGE);
		}
		else
		{
			// revive teammates
			if(deadfriend > 0 && GetAIPerformFunc(id) != AI_PERFORM_REVIVE)
			{
				AIPerform(id, AI_PERFORM_NONE);
				AIPerform(id, AI_PERFORM_REVIVE);				
			}
		}
	}
	else
	{
		if(VIP_ID[team] == -1)
			return;

		if(VIP_HP[team] <= 300)
		{
			if(VIP_HP[team] > VIP_HP[1-team] && rand() % 2 == 0)
			{
				// attack enemy VIP
				if(GetAIPerformFunc(id) != AI_PERFORM_MOVETOCHARA)
					AIPerform(id, AI_PERFORM_MOVETOCHARA, VIP_ID[1-team]);
			}
			else
			{
				// protect our VIP
				if(GetAIPerformFunc(id) != AI_PERFORM_MOVETOCHARA)
					AIPerform(id, AI_PERFORM_MOVETOCHARA, VIP_ID[team]);				
			}			
		}
	}
}

// AI update in rule vip type 1
void AI_OnUpdate_VIP_1(int id)
{

}

// AI update in rule vip type 2
void AI_OnUpdate_VIP_2(int id)
{

}