/**
* Returns change in battle strength if unit at region switches places with neighbor.
*
* @param region
* @param neighbor
* @param includeNeighborStrengthChange true if change in neighbor strength should be included
* @return
*/
private static float getBattleStrengthChange(
Region region, Neighbor neighbor, boolean includeNeighborStrengthChange) {
// get current strengths of region, neighbor
float regionStrength = RegionUtils.getRegionBattleStrength(region);
float neighborStrength = RegionUtils.getRegionBattleStrength(neighbor.region);
// swap units, see change in strengths
Unit tempUnit = region.unit;
region.unit = neighbor.region.unit;
neighbor.region.unit = tempUnit;
Player tempPlayer = region.player;
region.player = neighbor.region.player;
neighbor.region.player = tempPlayer;
float regionMoveStrength = RegionUtils.getRegionBattleStrength(region);
float neighborMoveStrength = RegionUtils.getRegionBattleStrength(neighbor.region);
// put units back
tempUnit = region.unit;
region.unit = neighbor.region.unit;
neighbor.region.unit = tempUnit;
tempPlayer = region.player;
region.player = neighbor.region.player;
neighbor.region.player = tempPlayer;
if (includeNeighborStrengthChange) {
return (regionMoveStrength + neighborMoveStrength - regionStrength - neighborStrength + 2)
/ 4;
} else {
return (regionMoveStrength - regionStrength + 1) / 2;
}
}
/**
* Returns changes in region strengths for each possible move.
*
* @param region
* @return
*/
protected static Map<Neighbor, Float> checkMoves(Region region) {
Map<Neighbor, Float> result = new HashMap<Neighbor, Float>();
for (Neighbor neighbor : region.neighbors) {
// check if neighbor can be moved to
if (RegionUtils.canMove(region, neighbor)) {
// get current strengths of region, neighbor
float regionStrength = RegionUtils.getRegionBattleStrength(region);
float neighborStrength = RegionUtils.getRegionBattleStrength(neighbor.region);
// swap units, see change in strengths
Unit tempUnit = region.unit;
region.unit = neighbor.region.unit;
neighbor.region.unit = tempUnit;
Player tempPlayer = region.player;
region.player = neighbor.region.player;
neighbor.region.player = tempPlayer;
float regionMoveStrength = RegionUtils.getRegionBattleStrength(region);
float neighborMoveStrength = RegionUtils.getRegionBattleStrength(neighbor.region);
// put units back
tempUnit = region.unit;
region.unit = neighbor.region.unit;
neighbor.region.unit = tempUnit;
tempPlayer = region.player;
region.player = neighbor.region.player;
neighbor.region.player = tempPlayer;
result.put(
neighbor,
regionMoveStrength + neighborMoveStrength - regionStrength - neighborStrength);
}
}
return result;
}
/**
* Returns best reinforcement for given region.
*
* @param region
* @return
*/
protected static ReinforcementType getBestReinforcement(Region region) {
ReinforcementType result = new ReinforcementType();
// existing unit
if (region.unit != null) {
float originalRegionHealth = region.unit.health;
float originalBattleStrength = RegionUtils.getRegionBattleStrength(region);
// simulate max health
region.unit.health = Unit.MAX_HEALTH;
result.strengthChange = RegionUtils.getRegionBattleStrength(region) - originalBattleStrength;
region.unit.health = originalRegionHealth;
}
// new unit
else {
// get optimal unit type
// check each possible unit type
for (Unit.Type unitType : Unit.Type.values()) {
region.unit = new Unit(unitType, Unit.MAX_HEALTH);
float regionBattleStrength = RegionUtils.getRegionBattleStrength(region);
if (result.unitType == null || regionBattleStrength > result.strengthChange) {
result.strengthChange = regionBattleStrength;
result.unitType = unitType;
}
}
// reset region to have no unit
region.unit = null;
}
return result;
}