/// <summary>
/// Checks if it is possible to place the chip on this point in vertical direction.
/// </summary>
///
/// <remarks> Christopher, 6/19/2015. </remarks>
///
/// <param name="index"> Zero-based index of the. </param>
/// <param name="shipLength"> Length of the ship. </param>
///
/// <returns> true if it succeeds, false if it fails. </returns>
private bool FieldIsValidVertical(int index, int shipLength)
{
bool isValid = false;
if (!(ships.IsSet(App.GameViewModel.WhichShip)))
{
if (!(App.GameViewModel.EnemyField[index]))
{
if (index - 10 * (shipLength - 1) >= 0)
{
if (index % 10 == 9 && index != 99)
{
for (int i = 0; i < shipLength; i++)
{
if (index != 9)
{
if (App.GameViewModel.EnemyField[index - 1] != true &&
App.GameViewModel.EnemyField[index + 9] != true &&
App.GameViewModel.EnemyField[index - 11] != true &&
App.GameViewModel.EnemyField[index + 10] != true &&
App.GameViewModel.EnemyField[index - 10] != true)
{
index -= 10;
isValid = true;
}
else
{
isValid = false;
break;
}
}
else
{
if (App.GameViewModel.EnemyField[index - 1] != true &&
App.GameViewModel.EnemyField[index + 9] != true &&
App.GameViewModel.EnemyField[index + 10] != true)
{
index -= 10;
isValid = true;
}
else
{
isValid = false;
break;
}
}
}
}
else if (index == 99)
{
for (int i = 0; i < shipLength; i++)
{
if (App.GameViewModel.EnemyField[index - 1] != true &&
App.GameViewModel.EnemyField[index - 11] != true &&
App.GameViewModel.EnemyField[index - 10] != true)
{
index -= 10;
isValid = true;
}
else
{
isValid = false;
break;
}
}
}
else if (index > 89 && index < 99)
{
for (int i = 0; i < shipLength; i++)
{
if (App.GameViewModel.EnemyField[index - 1] != true &&
App.GameViewModel.EnemyField[index + 1] != true &&
App.GameViewModel.EnemyField[index - 11] != true &&
App.GameViewModel.EnemyField[index - 10] != true &&
App.GameViewModel.EnemyField[index - 9] != true)
{
index -= 10;
isValid = true;
}
else
{
isValid = false;
break;
}
}
}
else
{
for (int i = 0; i < shipLength; i++)
{
if (index > 10)
{
if (App.GameViewModel.EnemyField[index - 1] != true &&
App.GameViewModel.EnemyField[index + 9] != true &&
App.GameViewModel.EnemyField[index - 9] != true &&
App.GameViewModel.EnemyField[index + 1] != true &&
App.GameViewModel.EnemyField[index + 10] != true &&
App.GameViewModel.EnemyField[index + 11] != true &&
App.GameViewModel.EnemyField[index - 10] != true &&
App.GameViewModel.EnemyField[index - 11] != true)
{
index -= 10;
isValid = true;
}
else
{
isValid = false;
break;
}
}
else if (index == 10)
{
if (App.GameViewModel.EnemyField[index + 1] != true &&
App.GameViewModel.EnemyField[index + 9] != true &&
App.GameViewModel.EnemyField[index - 9] != true &&
App.GameViewModel.EnemyField[index + 11] != true &&
App.GameViewModel.EnemyField[index + 10] != true)
{
index -= 10;
isValid = true;
}
else
{
isValid = false;
break;
}
}
else
{
if (App.GameViewModel.EnemyField[index + 1] != true &&
App.GameViewModel.EnemyField[index + 9] != true &&
App.GameViewModel.EnemyField[index + 10] != true)
{
index -= 10;
isValid = true;
}
else
{
isValid = false;
break;
}
}
}
}
}
}
}
return(isValid);
}