private bool IsGoodTarget(CellPosition target, IGameField prediction)
{
return
(OpponentFieldKnowledge.Contains(target) &&
prediction[target] is IShipCell &&
!OpponentFieldKnowledge[target].HasValue);
}
protected IEnumerable <CellPosition> FindDamagedShip()
{
var damagedShip = OpponentFieldKnowledge.EnumeratePositions()
.FirstOrDefault(position =>
OpponentFieldKnowledge[position] == true &&
position.AllNeighbours.Any(neighbour =>
OpponentFieldKnowledge.Contains(neighbour) &&
OpponentFieldKnowledge[neighbour] == null));
return(damagedShip == null
? Enumerable.Empty <CellPosition>()
: OpponentFieldKnowledge.FindAllConnectedByEdgeCells(damagedShip, knowledge => knowledge == true));
}
protected bool CanPredictionBeReal(IGameField prediction)
{
if (prediction == null)
{
return(false);
}
return((
from position in OpponentFieldKnowledge.EnumeratePositions()
let knowledge = OpponentFieldKnowledge[position]
where knowledge.HasValue
select prediction[position] is IShipCell == knowledge)
.All(x => x));
}
protected IGameField GenerateNewPrediction()
{
var builder = new GameFieldBuilder();
foreach (var position in OpponentFieldKnowledge.EnumeratePositions())
{
if (OpponentFieldKnowledge[position] == true)
{
builder.TryAddShipCell(position);
}
}
var generator = new RandomFieldGenerator(builder);
var damagedShip = FindDamagedShip().ToList();
if (damagedShip.Any())
{
foreach (var cell in damagedShip)
{
builder.TryRemoveShipCell(cell);
}
var variants = new[] { 4, 3, 2, 1 }.SelectMany(x => new[]
{
new { Ship = (ShipType)x, Vertical = true },
new { Ship = (ShipType)x, Vertical = false }
}).SelectMany(x => GenerateContinuesForDamagedShip(damagedShip, builder, x.Vertical, x.Ship));
foreach (var variant in variants)
{
builder.TryAddFullShip(variant.Item1, variant.Item2, variant.Item3);
var prediction = generator.Generate(x => OpponentFieldKnowledge[x] != false);
if (prediction != null)
{
return(prediction);
}
builder.TryRemoveFullShip(variant.Item1, variant.Item2, variant.Item3);
}
}
return(generator.Generate(x => OpponentFieldKnowledge[x] != false));
}
