/* Validation for signup page
authors:Mitchell Klein n8281866
        Luke Meggison nXXXXXXXX
*/
// ADD IN NUMBER DETECTION FOR LOOP
function testEmpty(fieldName,value,mutipleFields){//Tests fields that just need data
    multipleFields = (multipleFields)? "s are" : " is";
    if (value==null || value==""){
        output = output.concat("- The ", fieldname, " field", mutipleFields, " empty\n");
        return false;//Field is empty
    }else {
        return true;//field is not empty
    }
}//End Function

function testTextOnly(fieldname, value){
    var alphabet = /[a-zA-z]/;//Generates array will all lowercase and upper case characters
    if (alphabet.test(value)){//This does not allow users to have numbers in this field
        return true;
    } else {
        output = output.concat("- The", fieldname, " field should be letters only.\n");
        return false;
    }

}//End Function

function testPhoneNumber(number){
    if (!isNaN(parseFloat(number))){
        return true;
    } else {
        error=true;
        output = output.concat( "- The Phone Number is not valid.\n");
        retun false;
    }
}

function testEmail(field){ //tests if contains an @ and "." in the correct position
    var atPosition= field.indexOf("@");
    var dotPosition= field.lastIndexOf(".");
    if (atPosition<1 || dotposition+2>=field.length || dotPosition<atPosition+2){
        error= true;
        output = output.concat("- Entered Email Addresses must be real.\n");
        return false;
    } else{
        return true;
    }// end else If (symbol test)
}

function testValidPassword(value){
    var number = /[0-9]/;
    var alphabet = /[a-zA-z]/;
    var containsNumber = new boolean(false);
    var containsAlpha = new boolean(false);
    for (x=0; x<=value.length; x++){
        if (alphabet.test(value[x])){
            containsAlpha = true;
        }else if(number.test(value[x])){
            containsNumber = true;
        }else {
            return false; //is not a valid password, halts function and returns false
        }//End if, elseif, else
    }//End for loop
    if ((value.length>=8)&& containsNumber && containsAlpha){
        return true;
    } else{
        output = output.concat("- Passwords must be atleast 8 alphanumeric\n  characters long and have atleast one number\n");
        return false;
    }//End retuns
}//End function

function validation(this){//designed to be universal and work with any form
    var element = this.elements.length;//used as a reference for all elements inside of the form
    var error = new boolean(false);
    var output = new string("The following errors have occured:\n");

    for (x=0; x<=elements; x++){
        //name is assigned by developer and is set to a predefined "email, firstname, last name etc"
        var name=this.elements[x].name;
        var value=this.elements[x].value; //Entry withint text boxes etc

        switch(name){
            case "firstName":
                if ((!testEmpty("First Name", value))||(!testTextOnly("'First Name'", value))){
                    error = true;
                }
                break;
            case "lastName":
                if ((!testEmpty("Last Name",value))||(!testTextOnly("'Last Name'", value))){
                    error = true;
                }
                break;
            case "emailAddress":
                var confirmEmailAddress = this.getElemtentsByName("confirmEmailAddress").value;
                if ((!testEmpty("Email Address's",value))||(!string.compare(value, confirmEmailAddress))){
                    error = true;
                    output = output.concat("-Email fields do not match");
                }
                else if (!testEmail(value)){
                    error = true;
                }
                break;
            /*No need to include a confirm email case because a mismatch takes priotiry over
            whether the email address is valid. ANd there is no need to test if the confirm
            email address is valid if the first is valid and the two match */
            case "phoneNumber":
                if ((!empty("Phone Number",value))||(!testPhoneNumber(value))){
                    error=true;
                    }
                break;
            case "password":
                var confirmPassword = new string(this.getElementsByName("confirmPassword").value);
                if ((!testEmpty("Password ",value))|| (!string.compare(value, confirmPassword))){
                    x++;//skips the next element - if set up correctly it will be the confirm field
                    error = true;
                    output = output.concat( "- Passwords do not match.\n");
                }else if (!testValidPassword(value)){
                    error = true;
                }
                break;
            //Testing has already been done, but they still need to be included in the "predefined list"
            case "confirmEmailAddress":
            case "confirmPassword":
                break;
            default:
                alert("There was a field that was not on the predefined list");
                break;
        }//End switch Statement
    }//End for loop
    alert(output);
    if (error){
        return false;//halts form and requires user to fix data

    } else {
        return true;//continues to next page
    }
}//End Validation function