Minimum number of bracket reversals needed to make an expression balanced

BalanceBracket.java

// the code is not tested completly
import java.util.Deque;
import java.util.LinkedList;

class RemoveExtraBrackets {

    public int remove(char input[]){
        
        
        // ) ) ) ( ) ( ( (
        // ) ) ) ( ) ( ( ( 
        if(input == null){
            return 0;
        }
        Deque<Character> dq = new LinkedList<Character>();
        for(int i=0; i < input.length; i++){
            
            if(input[i] == '(')
            {
                dq.addLast(input[i]);
            }
            else if(input[i] == ')')
            {
                if(!dq.isEmpty() && dq.peekLast() == '('){
                //if(!dq.isEmpty() && dq.peekLast().equals('(')){
                    // System.out.println(" same ");
                    // System.out.println(dq.removeLast());
                    dq.removeLast();
                }else{
                    dq.addLast(input[i]);
                }
            }
            System.out.println(dq.toString());
        }
        
        System.out.println(dq.toString());
        int index = 0;
        while(!dq.isEmpty()){
            
            if(dq.size() == 1) {
                index = -1;
                break;
            }
            if( (dq.peekFirst() == '(' && dq.peekLast() == ')' ) ) 
            {
                dq.removeLast();
                dq.removeFirst();
            } else if ((dq.peekFirst() == '(' && dq.peekLast() == '(' )) {
                index++;
                dq.removeLast();
                dq.removeFirst();
            } 
            else if (dq.peekFirst() == ')' && dq.peekLast() == ')' ) 
            {
                index++;
                dq.removeLast();
                dq.removeFirst();
            }
            else if(dq.peekFirst() == ')' && dq.peekLast() == '(' )
            {
                index++;
                index++;
                dq.removeLast();
                dq.removeFirst();
            }
            System.out.println(dq.toString());
        }
        System.out.println(" Changed: " + index);
        return index;
    }
    
    
    public static void printArray(char input[], int size) {
        for(int i=0; i < size; i++){
            System.out.print(input[i] + " ");
        }
        System.out.println();
    }
    
    public static void main(String args[]){
        RemoveExtraBrackets reb = new RemoveExtraBrackets();
        //char input1[] = ")(".toCharArray();
        //char input1[] = ")))()(()".toCharArray();
        //char input1[] = "((((".toCharArray();
        //char input1[] = "(((())".toCharArray();
        char input1[] = ")(())(((".toCharArray();    
        int pos = reb.remove(input1);
    }
}