unexpected token inside function with conditionals and for loop [closed]

Ultra beginner here. I'm trying to use conditionals to channel a response for a mini chatbot program.

let counter = 0;

note: counter is going to be increased by form submit action.

function router(){      
    let input = getInput();

    var blah1 = respArr1[(Math.floor(Math.random))*respArr1.length];
    var blah2 = respArr2[(Math.floor(Math.random))*respArr2.length];
    var blah3 = respArr3[(Math.floor(Math.random))*respArr3.length];

        if(counter === 1){
            for(let i=0; i<input.length; i++){
                if(input[i].includes(userArr0){
                    return blah1;}
        }
    }
return blah2;

        if(counter === 2){
            return blah3;
        if(counter > 2){
            return talkAt();
                        }
                }
        }

I keep getting an "Unexpected token: {" error on the conditional

if(input[i].includes(userArr0){

I'm sure there's more than one thing wrong with this code. I'm trying to learn very quickly and probably making a lot of dumb mistakes.

Any help appreciated. Thanks!