// ============================================================================
// Developed by Kernel Team.
// http://kernel-team.com
// ============================================================================

String.prototype.trim = function() {
    return this.replace(/^\s+/, '').replace(/\s+$/, '');
};

// Common functions for reuse =================================================

function stub() {
}

function commonGet(id) {
    return document.getElementById(id);
}

function commonValidId(id) {
    return (id && commonGet(id));
}

function commonShow(id) {
    if (commonValidId(id)) {
        commonGet(id).style.display = 'block';
    }
}

function commonShowInline(id) {
    if (commonValidId(id)) {
        commonGet(id).style.display = 'inline';
    }
}

function commonHide(id) {
    if (commonValidId(id)) {
        commonGet(id).style.display = 'none';
    }
}

function commonProcessFieldError(fieldName, errorId) {
    for (var i = 0; i < 10; i++) {
        commonHide(fieldName + '_error_' + i);
    }
    commonShow(fieldName + '_' + errorId);
    return (errorId == null);
}

function commonValidateRequired(form, fieldName, errorCode) {
    if (!form[fieldName]) {
        return true;
    }
    if (form[fieldName].value.trim().length == 0) {
        return commonProcessFieldError(fieldName, errorCode);
    } else {
        return commonProcessFieldError(fieldName, null);
    }
}

function commonValidateEmail(form, fieldName, errorCode) {
    if (!form[fieldName]) {
        return true;
    }
    var email = /^\w[\w\-]*(\.\w[\w\-]*)*@\w[\w\-]+(\.\w[\w\-]+)*\.(a[c-gil-oq-uwz]|b[a-bd-jm-or-tvwyz]|c[acdf-ik-orsuvx-z]|d[ejkmoz]|e[ceghr-u]|f[i-kmorx]|g[abd-ilmnp-uwy]|h[kmnrtu]|i[delm-oq-t]|j[emop]|k[eg-imnprwyz]|l[a-cikr-vy]|m[acdghk-z]|n[ace-giloprtuz]|om|p[ae-hk-nrtwy]|qa|r[eouw]|s[a-eg-ort-vyz]|t[cdf-hjkm-prtvwz]|u[agkmsyz]|v[aceginu]|w[fs]|y[etu]|z[admrw]|com|edu|net|org|mil|gov|biz|pro|aero|coop|info|name|int|museum)$/;
    if (!email.test(form[fieldName].value)) {
        return commonProcessFieldError(fieldName, errorCode);
    } else {
        return commonProcessFieldError(fieldName, null);
    }
}

function commonGetAjaxParams() {
    return 'mode=async&rand=' + new Date().getTime();
}

function commonSendRequest(url, data, isPost, callback) {
    var req = null;
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        req = new ActiveXObject('Microsoft.XMLHTTP');
    }
    if (!req) {
        return null;
    }
    try {
        var postData = null;
        var method = null;
        if (isPost) {
            method = 'POST';
            postData = data;
        } else if (!data) {
            method = 'GET';
        } else if (data.length > 0) {
            method = 'GET';
            if (url.indexOf('?') >= 0) {
                url += '&' + data;
            } else {
                url += '?' + data;
            }
        }
        req.open(method, encodeURI(url), true);
        if (method == 'POST') {
            req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        }
        req.onreadystatechange = function() {
            if (req.readyState == 4) {
                var xml = req.responseXML;
                if (xml && xml.documentElement) {
                    if (xml.documentElement.nodeName == 'success') {
                        callback(xml.documentElement, null);
                    } else if (xml.documentElement.nodeName == 'failure') {
                        var childs = xml.documentElement.childNodes;
                        var errors = [];
                        for (var i = 0; i < childs.length; i++) {
                            if (childs[i].nodeName == 'error') {
                                var content = null;
                                if (childs[i].textContent) {
                                    content = childs[i].textContent;
                                } else if (childs[i].innerText) {
                                    content = childs[i].innerText;
                                } else if (childs[i].text) {
                                    content = childs[i].text;
                                }
                                errors.push(content);
                            }
                        }
                        callback(null, errors);
                    }
                }
            }
        };
        req.send(postData);
    } catch (e) {
        return e;
    }
    return null;
}

function commonGetTextContent(node) {
    if (node) {
        if (node.textContent) {
            return node.textContent;
        } else if (node.innerText) {
            return node.innerText;
        } else if (node.text) {
            return node.text;
        }
    }
    return null;
}

// Video view block functions =================================================

var videoViewFriendFormVisible = false;
var videoViewFriendCaptcha = null;
var videoViewMyVote = null;

function videoViewEnableSendToFriend(params) {
    var stfLink = params['link_id'];
    var stfBlock = params['block_id'];
    var stfBlockSuccess = params['success_message_id'];
    var stfForm = params['form_id'];
    var stfCaptcha = params['captcha_id'];
    var stfWait = params['wait_id'];
    var videoId = params['video_id'];

    if (commonValidId(stfLink)) {
        commonGet(stfLink).onclick = function() {
            if (videoViewFriendFormVisible) {
                commonHide(stfBlock);
            } else {
                commonShow(stfBlock);
                if (commonValidId(stfCaptcha)) {
                    if (!videoViewFriendCaptcha) {
                        videoViewFriendCaptcha = document.createElement('IMG');
                        commonGet(stfCaptcha).appendChild(videoViewFriendCaptcha);
                    }
                    videoViewFriendCaptcha.src = '?action=show_security_code&' + commonGetAjaxParams();
                }
            }
            commonHide(stfBlockSuccess);
            var st1 = (videoViewFriendFormVisible ? 'collapse_link' : 'expand_link');
            var st2 = (!videoViewFriendFormVisible ? 'collapse_link' : 'expand_link');
            videoViewFriendFormVisible = !videoViewFriendFormVisible;
            if (this.className.indexOf(st1) >= 0) {
                this.className = this.className.replace(st1, st2);
            }
            return false;
        }
    }
    if (commonValidId(stfForm) && videoId) {
        commonGet(stfForm).onsubmit = function() {
            var errorField = null;
            if (!commonValidateRequired(this, 'email', 'error_1')) {
                errorField = (errorField ? errorField : 'email');
            } else if (!commonValidateEmail(this, 'email', 'error_2')) {
                errorField = (errorField ? errorField : 'email');
            }
            if (!commonValidateRequired(this, 'message', 'error_1')) {
                errorField = (errorField ? errorField : 'message');
            }
            if (!commonValidateRequired(this, 'code', 'error_1')) {
                errorField = (errorField ? errorField : 'code');
            }

            if (!errorField) {
                var form = this;
                commonSendRequest('?' + commonGetAjaxParams(), 'action=send_to_friend&video_id=' + videoId + '&email=' + encodeURIComponent(form['email'].value) + '&message=' + encodeURIComponent(form['message'].value) + '&code=' + encodeURIComponent(form['code'].value), true, function(successNode, errorsList) {
                    if (successNode) {
                        form.reset();
                        if (commonValidId(stfLink)) {
                            commonGet(stfLink).onclick(commonGet(stfLink));
                        } else {
                            commonHide(stfBlock);
                        }
                        commonHide(stfWait);
                        commonShow(stfBlockSuccess);
                    } else if (errorsList) {
                        for (var i = 0; i < errorsList.length; i++) {
                            commonShow(errorsList[i]);
                        }
                        commonHide(stfWait);
                        videoViewFriendCaptcha.src = '?action=show_security_code&' + commonGetAjaxParams();
                    }
                });
                commonShowInline(stfWait);
            } else {
                this[errorField].focus();
            }
            return false;
        }
    }
}

function videoViewEnableVoting(params) {
    var ratingContainer = params['container_id'];
    var ratingHint = params['hint_message_id'];
    var ratingSuccess = params['success_message_id'];
    var ratingFailure = params['failure_message_id'];
    var emptyImageSrc = params['empty_image_src'];
    var moverImageSrc = params['mover_image_src'];
    var videoId = params['video_id'];

    if (!commonValidId(ratingContainer)) {
        return;
    }
    var stars = new Array();
    var container = commonGet(ratingContainer);
    if (!container) {
        return;
    }
    var index = 1;
    for (var i = 0; i < container.childNodes.length; i++) {
        var el = container.childNodes[i];
        if (el.tagName != 'IMG') {
            continue;
        }
        el.onmouseover = function() {
            if (videoViewMyVote) {
                return;
            }
            var src = moverImageSrc;
            for (var j = 0; j < stars.length; j++) {
                stars[j]['el'].src = src;
                if (stars[j]['el'] == this) {
                    src = emptyImageSrc;
                }
            }
        };
        el.onclick = function() {
            if (videoViewMyVote) {
                return false;
            }
            var index = 0;
            for (var j = 0; j < stars.length; j++) {
                if (stars[j]['el'] == this) {
                    index = stars[j]['index'];
                    break;
                }
            }
            videoViewMyVote = index;
            commonSendRequest('?' + commonGetAjaxParams(), 'action=rate&video_id=' + videoId + '&vote=' + index, false, function(successNode, errorsList) {
                commonHide(ratingHint);
                if (successNode) {
                    commonShow(ratingSuccess);
                } else if (errorsList) {
                    commonShow(ratingFailure);
                }
                var src = moverImageSrc;
                for (var j = 0; j < stars.length; j++) {
                    stars[j]['el'].src = src;
                    if (j == index - 1) {
                        src = emptyImageSrc;
                    }
                }
            });
        };
        stars.push({el: el, initial: el.src, index: index});
        index++;
    }
    container.onmouseout = function(e) {
        if (videoViewMyVote) {
            return;
        }
        if (!e) {
            e = window.event;
        }
        var mouseX = 0;
        var mouseY = 0;
        if (e.pageX && e.pageY) {
            mouseX = e.pageX;
            mouseY = e.pageY;
        } else if (e.clientX && e.clientY) {
            mouseX = e.clientX + document.body.scrollLeft + document.documentElement.scrollLeft;
            mouseY = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
        }

        var x = 0;
        var y = 0;
        var element = container;
        while (element) {
            x += element.offsetLeft;
            y += element.offsetTop;
            element = element.offsetParent;
        }
        if ((mouseX <= x) || (mouseY <= y) || (mouseX >= x + container.offsetWidth) || (mouseY >= y + container.offsetHeight)) {
            for (var j = 0; j < stars.length; j++) {
                stars[j]['el'].src = stars[j]['initial'];
            }
        }
    };
}

function videoViewEnableFlagging(params) {
    var flagContainer = params['container_id'];
    var flagButton = params['button_id'];
    var flagExternalId = params['flag_external_id'];
    var flagHint = params['hint_message_id'];
    var flagSuccess = params['success_message_id'];
    var flagFailure = params['failure_message_id'];
    var videoId = params['video_id'];

    if (!commonValidId(flagButton)) {
        return;
    }

    commonGet(flagButton).onclick = function() {
        commonSendRequest('?' + commonGetAjaxParams(), 'action=flag&video_id=' + videoId + '&flag_id=' + flagExternalId, false, function(successNode, errorsList) {
            commonHide(flagHint);
            commonHide(flagSuccess);
            commonHide(flagFailure);
            if (successNode) {
                commonShow(flagSuccess);
                commonHide(flagContainer);
            } else if (errorsList) {
                commonShow(flagFailure);
            }
        });
        return false;
    }
}

function videoViewEnableAddToFavourites(params) {
    var favLink = params['link_id'];
    var favBlockSuccess = params['success_message_id'];
    var videoId = params['video_id'];

    if (commonValidId(favLink)) {
        commonGet(favLink).onclick = function() {
            commonSendRequest('?' + commonGetAjaxParams(), 'action=add_to_favourites&video_id=' + videoId, false, function(successNode) {
                if (successNode) {
                    commonHide(favLink);
                    if (commonValidId(favBlockSuccess)) {
                        commonShow(favBlockSuccess);
                    }
                }
            });
            return false;
        }
    }
}

function videoViewEnableDownloadLink(params) {
    var downloadLink = params['link_id'];
    var sessionVarName = params['session_name'];
    var videoId = params['video_id'];

    if (commonValidId(downloadLink)) {
        var videoUrl = commonGet(downloadLink).href;
        commonGet(downloadLink).onclick = function() {
            commonSendRequest('?' + commonGetAjaxParams(), 'action=download_params&video_id=' + videoId + '&video_url=' + encodeURIComponent(videoUrl), true, function(successNode) {
                if (successNode)
                {
                    var sessionId = commonReadCookie(sessionVarName);
                    var time = '';
                    var ahv = '';
                    var childs = successNode.childNodes;
                    for (var i = 0; i < childs.length; i++) {
                        if (childs[i].nodeName == 'time') {
                            time = commonGetTextContent(childs[i]);
                        } else if (childs[i].nodeName == 'ahv') {
                            ahv = commonGetTextContent(childs[i]);
                        }
                    }
                    window.location = videoUrl + '?sessionVarName=' + sessionId + '&time=' + time + '&ahv=' + ahv + '&download=true';
                }
            });
            return false;
        };
    }
}

// Video comments block functions =============================================

var videoCommentsFormVisible = false;
var videoCommentsCaptcha = null;

function videoCommentsEnableComments(params) {
    var scLink = params['all_link_id'];
    var scBlock = params['all_block_id'];
    var acLink = params['add_link_id'];
    var acBlock = params['add_block_id'];
    var acBlockSuccess = params['success_message_id'];
    var acBlockFailure = params['failure_message_id'];
    var acForm = params['form_id'];
    var acCaptcha = params['captcha_id'];
    var acWait = params['wait_id'];
    var videoId = params['video_id'];

    if (commonValidId(scLink)) {
        commonGet(scLink).onclick = function() {
            this.style.display = 'none';
            commonShow(scBlock);
            return false;
        }
    }
    if (commonValidId(acLink)) {
        commonGet(acLink).onclick = function() {
            if (videoCommentsFormVisible) {
                commonHide(acBlock);
            } else {
                commonShow(acBlock);
                if (commonValidId(acCaptcha)) {
                    if (!videoCommentsCaptcha) {
                        videoCommentsCaptcha = document.createElement('IMG');
                        commonGet(acCaptcha).appendChild(videoCommentsCaptcha);
                    }
                    videoCommentsCaptcha.src = '?action=show_security_code&' + commonGetAjaxParams();
                }
            }
            commonHide(acBlockSuccess);
            commonHide(acBlockFailure);
            var st1 = (videoCommentsFormVisible ? 'collapse_link' : 'expand_link');
            var st2 = (!videoCommentsFormVisible ? 'collapse_link' : 'expand_link');
            videoCommentsFormVisible = !videoCommentsFormVisible;
            if (this.className.indexOf(st1) >= 0) {
                this.className = this.className.replace(st1, st2);
            }
            return false;
        }
    }
    if (commonValidId(acForm)) {
        commonGet(acForm).onsubmit = function() {
            var errorField = null;
            if (!commonValidateRequired(this, 'comment', 'error_1')) {
                errorField = (errorField ? errorField : 'comment');
            }
            if (!commonValidateRequired(this, 'code', 'error_5')) {
                errorField = (errorField ? errorField : 'code');
            }

            if (!errorField) {
                var form = this;
                var captchaCode = '';
                if (form['code']) {
                    captchaCode = form['code'].value;
                }
                commonSendRequest('?' + commonGetAjaxParams(), 'action=add_comment&video_id=' + videoId + '&comment=' + encodeURIComponent(form['comment'].value) + '&code=' + encodeURIComponent(captchaCode), true, function(successNode, errorsList) {
                    if (successNode) {
                        form.reset();
                        if (commonValidId(acLink)) {
                            commonGet(acLink).onclick(commonGet(acLink));
                        } else {
                            commonHide(acBlock);
                        }
                        commonHide(acWait);
                        commonShow(acBlockSuccess);
                    } else if (errorsList) {
                        for (var i = 0; i < errorsList.length; i++) {
                            commonShow(errorsList[i]);
                        }
                        commonHide(acWait);
                        if (commonValidId(acCaptcha)) {
                            videoCommentsCaptcha.src = '?action=show_security_code&' + commonGetAjaxParams();
                        }
                    }
                });
                commonShowInline(acWait);
            } else {
                this[errorField].focus();
            }
            return false;
        }
    }
}

function videoCommentsGenerateCaptcha(params) {
    var acCaptcha = params['captcha_id'];
    if (commonValidId(acCaptcha)) {
        if (!videoCommentsCaptcha) {
            videoCommentsCaptcha = document.createElement('IMG');
            commonGet(acCaptcha).appendChild(videoCommentsCaptcha);
        }
        videoCommentsCaptcha.src = '?action=show_security_code&' + commonGetAjaxParams();
    }
}

// Statistics functions =======================================================

commonCreateCookie('kt_tcookie', '1', 1);
if (commonReadCookie('kt_tcookie') == '1') {
    var img = new Image();
    img.src = '?mode=async&action=js_stats_view_video&rand=' + new Date().getTime();
}