wrong cast usage: was casting isset() not its result

[bgeneto]

Main changes:

1. Moved type casts after the ternary conditions
2. For complex conditions with multiple isset checks, grouped the condition in parentheses
3. For cases with multiple null coalescing operators, wrapped them in parentheses before applying the cast
4. Added some line breaks for better readability in complex conditions
5. The (bool) casts were moved to wrap the filter_var results instead of the isset checks

Easy to check the wrong behavior of casting with this line:

$value = (float) false ? 1.5 : 3;
print($value);
print(gettype($value)); // will print integer not float 
`` 

[guilherme-cota-efi]

Thank you for your PR, @bgeneto! The improvement has been implemented in SDK version 1.10.0, correcting the improper casting with isset() for proper type conversion.