/*
    Umbraco Forms - Dependencies Checker
*/

function performDependencyChecks(formId){

    //Only perform check if the global 'Umbraco.Sys' is null/undefined
    //If present means we are in backoffice & that this is being rendered as a macro preview
    //We do not need to perform this check here
    if (typeof Umbraco !== 'undefined' && typeof Umbraco.Sys !== 'undefined'){
        return;
    } 
    else {
        //Check that a Form ID is passed into the function 
        if(formId){
            
            //Select the wrapping div around the form 
            //umbraco_form_GUID
            var umbracoForm = document.getElementById('contour_form_' + formId);
            
            var errorElement = document.createElement('div');
            errorElement.className='umbraco-forms missing-library';
            errorElement.style.color = '#fff';
            errorElement.style.backgroundColor = '#9d261d';
            errorElement.style.padding = '15px';
            errorElement.style.margin = '10px 0';
            var errorMessage = "";
            
            //Ensure umbracoForm is not null
            if(umbracoForm) {
                
                //Check for jQuery
                if (typeof jQuery == 'undefined') {
                    errorMessage = errorMessage + 'jQuery has not been loaded & is required for Umbraco Forms.';
                } else {
                    //These only work if jQuery is present, so it's in the else block
                    
                    //Check for jQuery Validation
                    if(!$.validator) {
                        errorMessage = errorMessage + '<br />jQuery Validate has not been loaded & is required for Umbraco Forms.'
                    }
                    
                    //Check for jQuery Validation Unobtrusive
                    //Only works if jQuery validator has been loaded
                    if($.validator && !$.validator.unobtrusive) {
                        errorMessage = errorMessage + '<br />jQuery Validate Unobtrusive has not been loaded & is required for Umbraco Forms.';
                    }
                }
                if(errorMessage !== "") {
                    errorElement.innerHTML = errorMessage + '<br/> <a href="https://our.umbraco.org/documentation/products/umbracoforms/developer/Prepping-Frontend/" target="_blank" style="text-decoration:underline; color:#fff;">See Umbraco Forms Documentation</a>';
                    umbracoForm.insertBefore(errorElement, umbracoForm.childNodes[0]);
                }
            }
        }
    }
}