function approve_get_iframe_content(frame) {
    var frame_content = frame.contentWindow;
    return frame_content;
}

// DEBUG MODE -- Set to true if you want console logs to show.
var approve_debug_mode = false;
approve_debug_log("APPROVE SCRIPT LOADED");
// ******************************************************************
// ******************************************************************
//                          PRODUCT PAGE
// ******************************************************************
// ******************************************************************

var iframe_wrapper = null;
setTimeout(()=>{
    iframe_wrapper = document.querySelectorAll('.shopify-buy-frame iframe');
    iframe_wrapper.forEach(function (iframe, index) {
        // FOREACH IFRAME ON PAGE
        approve_init_product_button_code(iframe);
    });
},500);
// ******************************************************************
// ******************************************************************
//                          PRODUCT GALLERY WITH BUTTONS
// ******************************************************************
// ******************************************************************
function approve_init_product_button_code(frame) {
    var approve_iframe_content_document = frame.contentWindow.document;
    var approve_iframe_content_body = approve_iframe_content_document.body;
    // gallery wrapper

    if (approve_iframe_content_body && approve_iframe_content_document) {

        function init_approve_gallery_page_buttons() {

            // ******************************************************************
            //              PRODUCT GALLERY Variable Configuration
            // ******************************************************************
            // Check to make sure that we are on a product gallery page

            // Wrapper for each item relative to document with approve_product_gallery_page_check_ele_name
            var approve_product_gallery_item_ele = ' .shopify-buy__product';
            // Model for each item relative to the item
            var approve_product_gallery_item_model_ele_name = ' .shopify-buy__product__title';
            // Price for each item relative to the item
            var approve_product_gallery_item_price_ele_name = '.shopify-buy__product__actual-price';
            // Insert button after relative to the item
            var approve_product_gallery_item_insert_after_ele_name = '.shopify-buy__btn-wrapper';

            // Qty button relative to the item (optional)
            var approve_product_gallery_item_qty_ele_name = ' input.shopify-buy__quantity';
            var approve_product_gallery_item_inc_quantity_ele_name = '';
            var approve_product_gallery_item_dec_quantity_ele_name = '';

            // Options relative to the item (optional) (Watcher and event change not programmed)
            var approve_product_gallery_item_options_wrapper_ele_name = '.shopify-buy__product__variant-selectors';
            var approve_product_gallery_item_select_ele_name = '.shopify-buy__product__variant-selectors select.shopify-buy__option-select__select';

            // CSS for button
            // APPROVE BUTTON STYLING
            var approve_button_display_style = 'inline-block';
            var approve_button_display_margin = '10px 0px';
            if (window.location.pathname == "/u-locate") {
                approve_button_display_margin = '10px 0px 0px 25px';
            }
            var approve_product_gallery_item_button_display_style = 'block';
            var approve_product_gallery_item_button_display_margin = '10px 0px';
            var approve_product_gallery_item_button_to_remove_ele = '';

            // PRODUCT GALLERY
            // check for items, loop through and init button function with each
            var approve_gallery_product_array = approve_iframe_content_body.querySelectorAll(approve_product_gallery_item_ele);
            //console.log("array contents: ", approve_gallery_product_array);
            approve_gallery_product_array.forEach(function(item, idx) {
                init_approve_product_gallery_item_button(item, idx);
            });

            function init_approve_product_gallery_item_button(item, idx) {
                //console.log("init_approve_product_gallery_item_button item: ", item);

                // model
                var approve_product_gallery_item_model_ele  = (approve_product_gallery_item_model_ele_name ? item.querySelector(approve_product_gallery_item_model_ele_name) : null);
                if (!approve_product_gallery_item_model_ele){
                    approve_debug_log("APPROVE: No dynamic approve_product_gallery_item_model_ele found.",0,1);
                    return;
                }
                var approve_product_gallery_item_model = approve_product_gallery_item_model_ele.textContent


                // price
                var approve_product_gallery_item_price_ele  = (approve_product_gallery_item_price_ele_name ? item.querySelector(approve_product_gallery_item_price_ele_name) : null);
                if (!approve_product_gallery_item_price_ele){
                    approve_debug_log("APPROVE: No dynamic approve_product_gallery_item_price_ele found.",0,1);
                    return;
                }
                var approve_product_gallery_item_price = approve_product_gallery_item_price_ele.innerHTML.replace(/[^0-9.]/g, '');
                approve_product_gallery_item_price = parseFloat(approve_product_gallery_item_price);
                if (!approve_product_gallery_item_price || approve_product_gallery_item_price == 0){
                    approve_debug_log("APPROVE: approve_product_gallery_item_price not found (or is 0) after removing non-numerical characters.",1);
                }


                var approve_qty_ele_name_wrapper = '.shopify-buy__btn-and-quantity'
                var approve_item_qty_ele_wrapper  = (approve_qty_ele_name_wrapper ? item.querySelector(approve_qty_ele_name_wrapper) : null);
                // qty
                var approve_product_gallery_item_qty_ele  = (approve_product_gallery_item_qty_ele_name ? item.querySelector(approve_product_gallery_item_qty_ele_name) : null);
                var approve_product_gallery_item_qty = 1;
                if (!approve_product_gallery_item_qty_ele){
                    approve_debug_log("APPROVE: No dynamic approve_product_gallery_item_qty_ele found.",1);
                    approve_debug_log(approve_product_gallery_item_qty_ele,1);
                } else {
                    approve_product_gallery_item_qty = approve_product_gallery_item_qty_ele.value;
                }
                approve_product_gallery_item_qty = parseInt(approve_product_gallery_item_qty);
                //console.log("gallery item qty: ", approve_product_gallery_item_qty);


                // element to insert after
                var approve_product_gallery_item_insert_after_ele = (approve_product_gallery_item_insert_after_ele_name ? item.querySelector(approve_product_gallery_item_insert_after_ele_name) : null);
                if (!approve_product_gallery_item_insert_after_ele){
                    approve_debug_log("APPROVE: No dynamic approve_product_gallery_item_insert_after_ele found.",0,1);
                    return;
                }

                // Options
                if (approve_product_gallery_item_options_wrapper_ele_name){
                    var approve_product_gallery_item_options_wrapper_ele = approve_iframe_content_body.querySelector(approve_product_gallery_item_options_wrapper_ele_name);
                    if (!approve_product_gallery_item_options_wrapper_ele){
                        //console.log(approve_product_gallery_item_options_wrapper_ele_name);
                        approve_debug_log("No approve_product_gallery_item_options_wrapper_ele found.");
                    } else { // TRH - added else to prevent js error when options dont exist
                        var approve_product_gallery_item_selected_options = approve_product_gallery_item_options_wrapper_ele.querySelectorAll(approve_product_gallery_item_select_ele_name);
                        if (!approve_product_gallery_item_selected_options){
                            approve_debug_log("No approve_product_gallery_item_selected_options found.");
                        }
                        approve_product_gallery_item_selected_options.forEach(function (option_item, index) {
                            // CONFIGURE OPTIONS HERE
                            if (option_item.value) {
                                approve_product_gallery_item_model += ' | ' + (option_item.value ? option_item.value : '');
                            }
                        });
                    }
                }

                // console.log("CHECK FOR ITEM BUTTON ", item, item.querySelector('#approve_product_gallery_item_button_'+idx))
                var approve_product_gallery_item_button = item.querySelector('#approve_product_gallery_item_button_'+idx);
                if (!approve_product_gallery_item_button){
                    // If event listener is needed for options, here is where it can be initiated.
                    if (approve_product_gallery_item_options_wrapper_ele_name){
                        var approve_product_gallery_item_options_wrapper_ele = approve_iframe_content_body.querySelector(approve_product_gallery_item_options_wrapper_ele_name);
                        if (approve_product_gallery_item_options_wrapper_ele){
                            // If a change listener is needed for options, it is initliazed here.
                            var approve_product_gallery_item_options1 = approve_product_gallery_item_options_wrapper_ele.querySelectorAll(approve_product_gallery_item_select_ele_name);
                            approve_product_gallery_item_options1.forEach(function (opt_item) {
                                opt_item.addEventListener('change',event => {
                                    setTimeout(()=>{
                                        init_approve_product_gallery_item_button(item, idx);
                                    },500);
                                })
                            });
                        }
                    }

                    // Insert Button
                    var approve_product_gallery_item_button = document.createElement('approve-button');
                    approve_product_gallery_item_button.id = "approve_product_gallery_item_button_"+idx;

                    // BUTTON CSS
                    if (approve_product_gallery_item_button_display_style){
                        approve_product_gallery_item_button.style.display = approve_button_display_style;
                    }
                    if (approve_product_gallery_item_button_display_margin){
                        approve_product_gallery_item_button.style.margin = approve_button_display_margin;
                    }

                    approve_product_gallery_item_button.setAttribute('application-type',"embedded_app");
                    var approve_product_gallery_item_btn_wrapper = approve_iframe_content_document.createElement("div");
                    approve_product_gallery_item_btn_wrapper.appendChild(approve_product_gallery_item_button);
                    approve_product_gallery_item_insert_after_ele.after(approve_product_gallery_item_btn_wrapper);

                    // IF ITS A SINGLE PRODUCT COLLECTION, TWEAK IFRAME HEIGHT BY 120PX TO FIT BUTTON
                    if (approve_gallery_product_array.length == 1) {
                        var approve_height = parseInt(frame.style.height);
                        frame.style.height = approve_height + 120 + "px";
                    }
                }

                // Removing a button
                if (approve_product_gallery_item_button_to_remove_ele){
                    var approve_product_gallery_item_button_to_remove = document.querySelector(approve_product_gallery_item_button_to_remove_ele);
                    if (approve_product_gallery_item_button_to_remove){
                        approve_product_gallery_item_button_to_remove.style.display = "none";
                    }
                }

                //console.log("model: ", approve_product_gallery_item_model);
                //console.log("price: ", approve_product_gallery_item_price);
                // Set approve button variables.
                approve_product_gallery_item_button.setAttribute('price',approve_product_gallery_item_price);
                approve_product_gallery_item_button.setAttribute('model',approve_product_gallery_item_model);
                approve_product_gallery_item_button.setAttribute('qty',approve_product_gallery_item_qty);
                approve_product_gallery_item_button.setAttribute('type',"new_product");


                if (approve_product_gallery_item_qty_ele){
                    // Add change watcher to qty input
                    //console.log("approve_product_gallery_item_qty_ele", approve_qty_ele_name_wrapper);
                    approve_product_gallery_item_qty_ele.addEventListener('change',event => {
                        var this_item = item;
                        //console.log("change", item);
                        approve_product_gallery_item_update_qty(approve_product_gallery_item_qty_ele.value, this_item, idx);
                    })


                    if (approve_product_gallery_item_inc_quantity_ele_name
                        && approve_product_gallery_item_dec_quantity_ele_name
                    ){
                        approve_product_gallery_item_activate_increase_and_decrease_buttons(item, idx);
                    }
                }

                // If price is below $200, teaser rate breaks. Let's ensure that it's above $500.
                if ((parseFloat(approve_product_gallery_item_price) * parseInt(approve_product_gallery_item_qty)) < 500){
                    approve_debug_log("Price is below $500.");
                    approve_product_gallery_item_button.style.display = "none";
                    return;
                }

            }

            // ******************************************************************
            // Simple set button qty. Must pass the new QTY to the button.
            // ******************************************************************
            function approve_product_gallery_item_update_qty(new_qty, item, idx){
                var approve_product_gallery_item_button = item.querySelector('#approve_product_gallery_item_button_'+idx);
                if (approve_product_gallery_item_button){
                    var approve_product_gallery_item_btn_qty = parseInt(approve_product_gallery_item_button.getAttribute('qty'));
                    if (new_qty != approve_product_gallery_item_btn_qty){
                        approve_product_gallery_item_button.setAttribute('qty',new_qty);
                    }
                }
            }

            function approve_product_gallery_item_activate_increase_and_decrease_buttons(item, idx, number_of_tries=0) {
                // console.log("INSIDE FUNCTION approve_product_gallery_item_activate_increase_and_decrease_buttons ", item, idx, number_of_tries);
                number_of_tries++;
                // buttons that raise or lower the quantity.
                var approve_product_gallery_item_qty_btn_inc = item.querySelector(approve_product_gallery_item_inc_quantity_ele_name);
                var approve_product_gallery_item_qty_btn_dec = item.querySelector(approve_product_gallery_item_dec_quantity_ele_name);
                if ((!approve_product_gallery_item_qty_btn_inc
                        || !approve_product_gallery_item_qty_btn_dec
                    )
                    && number_of_tries < 10
                ){
                    setTimeout(() => {
                        approve_product_gallery_item_activate_increase_and_decrease_buttons(item, idx, number_of_tries)
                    },500);
                    return;
                }

                // Assign click events to these buttons so that qty is updated on click.
                if(approve_product_gallery_item_qty_btn_inc
                    && approve_product_gallery_item_qty_btn_dec
                ){
                    approve_product_gallery_item_qty_btn_inc.addEventListener('click',event => {
                        var this_item = item;
                        // console.log("INSIDE CLICK EVENT FOR BUTTON ", item);
                        var approve_product_gallery_item_button = item.querySelector('#approve_product_gallery_item_button_'+idx);
                        if (approve_product_gallery_item_button){
                            var approve_product_gallery_item_btn_qty = parseInt(approve_product_gallery_item_button.getAttribute('qty'));
                            approve_product_gallery_item_btn_qty = approve_product_gallery_item_btn_qty + 1;
                            approve_product_gallery_item_update_qty(approve_product_gallery_item_btn_qty, item, idx);
                        }
                    });

                    approve_product_gallery_item_qty_btn_dec.addEventListener('click',event => {
                        var approve_product_gallery_item_button = item.querySelector('#approve_product_gallery_item_button_'+idx);
                        if (approve_product_gallery_item_button){
                            var approve_product_gallery_item_btn_qty = parseInt(approve_product_gallery_item_button.getAttribute('qty'));
                            if (approve_product_gallery_item_btn_qty > 1){
                                approve_product_gallery_item_btn_qty = approve_product_gallery_item_btn_qty - 1;
                                approve_product_gallery_item_update_qty(approve_product_gallery_item_btn_qty, item, idx);
                            }
                        }
                    });
                }
                else {
                    approve_debug_log("APPROVE: No approve_qty_btn_inc or approve_qty_btn_dec found.",1);
                }
            }

        }
        init_approve_gallery_page_buttons();

        var approve_iframe_document_watcher = approve_iframe_content_document;
        // Add observer to price element
        const approve_iframe_document_observer = new MutationObserver(function() {
            init_approve_gallery_page_buttons();
        });
        approve_iframe_document_observer.observe(approve_iframe_document_watcher,{subtree: true, childList: true});

    }

}




// IF YOU WANT TO USE A LOG WITH COLORS YOU CAN USE
function approve_debug_log(log, warn, err) {
    warn = warn || false;
    err = err || false;
    let css = "padding: 5px 20px; ";
    if (err) {
        css += "background:#8B0000; color:#fff; ";
    } else if(warn) {
        css += "background:#FFBF00; color:#000; ";
    } else {
        css += "background:#418AC9; color:#fff; ";
    }
    if (approve_debug_mode) console.log("%c"+log,css);
}