/*-----------------------------------------------------------------------------
 * Javascript Functions
 *-----------------------------------------------------------------------------
 * stock_levels.js
 *-----------------------------------------------------------------------------
 * Project: Apple Bazaar 2.0.0
 * 
 * Descronix Pte. Ltd. All Rights Reserved
 *-----------------------------------------------------------------------------
 */

function ale(f){var old = window.onload;if (typeof window.onload != 'function') {window.onload = f;} else {window.onload = function() {old();f();}}}function st(e,t){if(e) {e.innerText = t;e.textContent = t;}}function gv(o){var a = [];for(var i=0; i<o.length; ++i) {for(var j=0; o[i] && j<o[i].length; ++j) {if (o[i][j].options)a.push(o[i][j].options[o[i][j].selectedIndex].value);else if (o[i][j].checked)a.push(o[i][j].value);else if (o[i][j].length) {for(var k=0; o[i][j] && k<o[i][j].length; ++k) {if (o[i][j][k].options)a.push(o[i][j][k].options[o[i][j][k].selectedIndex].value);else if (o[i][j][k].checked)a.push(o[i][j][k].value);}}}}return a;}
function sh(e,h){if(e) { e.innerHTML = h;e.htmlContent = h; }}

// Safe guard - prevent javascript errors from incorrect installation
function checkInstallation(showAlert)
{
    if (typeof showAlert == 'undefined')
        var showAlert = false;

    if (typeof sl_elements == 'undefined'
            || typeof sl_validAssignIds == 'undefined'
            || typeof sl_stockInfo == 'undefined'
            // product settings
            || typeof sl_prodCode == 'undefined'
            || typeof sl_totalStock == 'undefined'
            || typeof sl_useStock == 'undefined'
            // store general settings
            || typeof sl_showStockLevel == 'undefined'
            || typeof sl_allowOutOfStock == 'undefined'
            // module settings/language strings
            || typeof sl_appendCode == 'undefined'
            || typeof sl_appendChar == 'undefined'
            || typeof sl_langInStock == 'undefined'
            || typeof sl_langOutOfStock == 'undefined'
            || typeof sl_langVariantOutOfStock == 'undefined'
            || typeof sl_langVariantNotAvail == 'undefined'
            || typeof sl_langOutOfStockAlert == 'undefined'
            || typeof sl_langNotAvailAlert == 'undefined') {
        // if these javascript variables are not set -- indicates installation error!
        if (showAlert) alert("Please report the following message to Apple Bazaar and\nthen continue your shopping!\n\nStock Levels has not been setup correctly, please check:\n- styleTemplates/content/viewProd.tpl\n- includes/content/viewProd.inc.php");
        return false;
    }
    return true;
}

function getIndex(assignIds)
{
    var index = '';
    for (var i=0; i<sl_validAssignIds.length; ++i) {
        for (var j=0; j<assignIds.length; ++j) {
            if (sl_validAssignIds[i] == assignIds[j]) {
                if (index.length > 0) index += ',';
                index += sl_validAssignIds[i];
            }
        }
    }
    return index;
}

function updateStockLevel()
{
    if (!checkInstallation()) {
        return;
    }

    var assignIds = [];
    var stockString = '';
    var outStockString = '';
    var prodCode = '';
    var a = gv(sl_elements);
    var incompleteSelection = false;

    for (var i=0; i<a.length; ++i) {
        // compatibility with "Force Selection of Product Options"
        if (a[i].charAt(0)=='0') {
            a.length = 0;
            incompleteSelection = true;
        }
    }

    var index = getIndex(a);

    if (typeof sl_stockInfo[index] != 'undefined') {
        prodCode   = sl_stockInfo[index][1];
        var stockLevel = sl_stockInfo[index][0];
    } else if (index == '') {
        var stockLevel = sl_totalStock;
    }

    if (sl_useStock && typeof stockLevel != 'undefined') {
        if (incompleteSelection) {
            // compatibility with "Force Selection of Product Options"
            stockString = outStockString = '';
        } else if (stockLevel > 0) {
            // this product variant is in stock
            stockString = sl_langInStock;
            if (sl_showStockLevel) stockString += ': ' + stockLevel;
            outStockString = '';
        } else if (sl_totalStock <= 0) {
            // product entirely sold out
            stockString = '';
            outStockString = sl_langOutOfStock;
        } else {
            // this product variant is sold out
            stockString = '';
            outStockString = sl_langVariantOutOfStock;
        }
    } else if (sl_useStock) {
        // this product variant is not available
        stockString = '';
        outStockString = sl_langVariantNotAvail;
    }

    var inStockSpan    = document.getElementById('inStock');
    var outOfStockSpan = document.getElementById('outOfStock');
    var prodCodeSpan   = document.getElementById('prodCode');

    if (sl_useStock) {
        sh(inStockSpan, stockString);
        sh(outOfStockSpan, outStockString);
    }

    if (prodCode != '' && sl_appendCode) {
        st(prodCodeSpan, sl_prodCode+sl_appendChar+prodCode);
    } else if (prodCode != '' && !sl_appendCode) {
        st(prodCodeSpan, prodCode);
    } else {
        st(prodCodeSpan, sl_prodCode);
    }
}

function checkStock()
{
    if (!checkInstallation(true)) {
        return true;
    }

    var a = gv(sl_elements);
    var index = getIndex(a);

    if (typeof sl_stockInfo[index] != 'undefined') {
        stockLevel = sl_stockInfo[index][0];
    } else if (index == '') {
        stockLevel = sl_totalStock;
    }

    if (typeof stockLevel != 'undefined') {
        if (stockLevel > 0) {
            // in stock
            return true;
        } else if (stockLevel <= 0 && !sl_useStock) {
            // this product ignores stock levels entirely (except for 'never available' variants)
            return true;
        } else if (stockLevel <= 0 && sl_allowOutOfStock) {
            // out of stock, out of stock purchases ARE permitted
            return true;
        } else if (stockLevel <= 0 && !sl_allowOutOfStock) {
            // out of stock, out of stock purchases NOT permitted
            alert(sl_langOutOfStockAlert);
            return false;
        }
    } else {
        // this size/colour/etc marked as "never available"
        alert(sl_langNotAvailAlert);
        return false;
    }
}