// Vanilla named settlements supply exclusion areas; no original mission location system.
// Shared town/village exclusion for mortar impacts, roadblocks and mine sites.
// Fixed distance from mapped settlement centres, independent of mission
// activation radii. Scattered buildings and props are not settlements.
class ERR_SettlementSafety
{
	static const float RADIUS = 200;
	string SettlementReason;
	protected vector m_SafeImpact;
	protected bool m_SettlementNear;
	protected vector m_LastSettlementImpact;
	protected float m_LastSettlementCheck = -1;
	protected bool m_LastSettlementClear;

	bool OutsideSettlements(vector impact)
	{
		float now = GetGame().GetWorld().GetWorldTime();
		if (m_LastSettlementCheck >= 0 && now >= m_LastSettlementCheck && now - m_LastSettlementCheck < 1000 && vector.DistanceXZ(impact, m_LastSettlementImpact) == 0)
			return m_LastSettlementClear;
		m_LastSettlementCheck = now;
		m_LastSettlementImpact = impact;
		m_LastSettlementClear = false;
		m_SafeImpact = impact;
		m_SettlementNear = false;
		SettlementReason = "clear";
		// Also cover named native map settlements, independent of whether the
		// mission placed a garrison marker there. Generic building entities also
		// include deer stands, bridge pillars, rubble and electrical cabinets.
		// Broad vertical bounds keep the 200m distance horizontal on hills.
		GetGame().GetWorld().QueryEntitiesByAABB(impact - Vector(RADIUS, 5000, RADIUS), impact + Vector(RADIUS, 5000, RADIUS), CheckSettlement, FilterSettlement, EQueryEntitiesFlags.ALL);
		m_LastSettlementClear = !m_SettlementNear;
		return m_LastSettlementClear;
	}

	protected bool FilterSettlement(IEntity entity)
	{
		return entity && entity.FindComponent(MapDescriptorComponent);
	}

	protected bool CheckSettlement(IEntity entity)
	{
		float radius;
		MapDescriptorComponent descriptor = MapDescriptorComponent.Cast(entity.FindComponent(MapDescriptorComponent));
		if (descriptor)
		{
			int type = descriptor.GetBaseType();
			if (type == EMapDescriptorType.MDT_NAME_CITY)
				radius = RADIUS;
			else if (type == EMapDescriptorType.MDT_NAME_TOWN)
				radius = RADIUS;
			else if (type == EMapDescriptorType.MDT_NAME_VILLAGE || type == EMapDescriptorType.MDT_NAME_SETTLEMENT)
				radius = RADIUS;
		}
		if (radius > 0 && vector.DistanceXZ(m_SafeImpact, entity.GetOrigin()) <= radius)
		{
			m_SettlementNear = true;
			SettlementReason = string.Format("named map settlement entity=%1 position=%2 distance=%3m exclusion=%4m", entity, entity.GetOrigin(), vector.DistanceXZ(m_SafeImpact, entity.GetOrigin()), radius);
			return false;
		}
		return true;
	}

}