main

    function _handleGoLiveCommand() {
        if (LiveDevImpl.status >= LiveDevImpl.STATUS_ACTIVE) {
            LiveDevImpl.close();
        } else if (LiveDevImpl.status <= LiveDevImpl.STATUS_INACTIVE) {
            if (!params.get("skipLiveDevelopmentInfo") && !PreferencesManager.getViewState("livedev.afterFirstLaunch")) {
                PreferencesManager.setViewState("livedev.afterFirstLaunch", "true");
                Dialogs.showModalDialog(
                    DefaultDialogs.DIALOG_ID_INFO,
                    Strings.LIVE_DEVELOPMENT_INFO_TITLE,
                    Strings.LIVE_DEVELOPMENT_INFO_MESSAGE
                ).done(function (id) {
                    LiveDevImpl.open();
                });
            } else {
                LiveDevImpl.open();
            }
        }
    }

    function _handleReloadLivePreviewCommand() {
        if (LiveDevelopment.status >= LiveDevelopment.STATUS_ACTIVE) {
            LiveDevelopment.reload();
        }
    }

    function _loadStyles() {
        var lessText = require("text!LiveDevelopment/main.less");

        less.render(lessText, function onParse(err, tree) {
            console.assert(!err, err);
            ExtensionUtils.addEmbeddedStyleSheet(tree.css);
        });
    }

    function _setImplementation(multibrowser) {
        if (multibrowser) {
            // set implemenation
            LiveDevImpl = MultiBrowserLiveDev;
            // update styles for UI status
            _status = [
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_NOT_CONNECTED, style: "warning" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_NOT_CONNECTED, style: "" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_PROGRESS1, style: "info" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_CONNECTED, style: "success" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_OUT_OF_SYNC, style: "out-of-sync" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_SYNC_ERROR, style: "sync-error" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_PROGRESS1, style: "info" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_PROGRESS1, style: "info" }
            ];
        } else {
            LiveDevImpl = LiveDevelopment;
            _status = [
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_NOT_CONNECTED, style: "warning" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_NOT_CONNECTED, style: "" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_PROGRESS1, style: "info" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_PROGRESS2, style: "info" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_CONNECTED, style: "success" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_OUT_OF_SYNC, style: "out-of-sync" },
                { tooltip: Strings.LIVE_DEV_STATUS_TIP_SYNC_ERROR, style: "sync-error" }
            ];
        }
        // setup status changes listeners for new implementation
        _setupGoLiveButton();
        _setupGoLiveMenu();
        // toggle the menu
        _toggleLivePreviewMultiBrowser(multibrowser);
    }

    function _setLabel($btn, text, style, tooltip) {
        // Clear text/styles from previous status
        $("span", $btn).remove();
        $btn.removeClass(_allStatusStyles);

        // Set text/styles for new status
        if (text && text.length > 0) {
            $("<span class=\"label\">")
                .addClass(style)
                .text(text)
                .appendTo($btn);
        } else {
            $btn.addClass(style);
        }

        if (tooltip) {
            $btn.attr("title", tooltip);
        }
    }

    function _setupDebugHelpers() {
        window.ld = LiveDevelopment;
        window.i = Inspector;
        window.report = function report(params) { window.params = params; console.info(params); };
    }

    function _setupGoLiveButton() {
        if (!_$btnGoLive) {
            _$btnGoLive = $("#toolbar-go-live");
            _$btnGoLive.click(function onGoLive() {
                _handleGoLiveCommand();
            });
        }
        LiveDevImpl.on("statusChange", function statusChange(event, status, reason) {
            // status starts at -1 (error), so add one when looking up name and style
            // See the comments at the top of LiveDevelopment.js for details on the
            // various status codes.
            _setLabel(_$btnGoLive, null, _status[status + 1].style, _status[status + 1].tooltip);
            _showStatusChangeReason(reason);
            if (config.autoconnect) {
                window.sessionStorage.setItem("live.enabled", status === 3);
            }
        });

        // Initialize tooltip for 'not connected' state
        _setLabel(_$btnGoLive, null, _status[1].style, _status[1].tooltip);
    }

    function _setupGoLiveMenu() {
        LiveDevImpl.on("statusChange", function statusChange(event, status) {
            // Update the checkmark next to 'Live Preview' menu item
            // Add checkmark when status is STATUS_ACTIVE; otherwise remove it
            CommandManager.get(Commands.FILE_LIVE_FILE_PREVIEW).setChecked(status === LiveDevImpl.STATUS_ACTIVE);
            CommandManager.get(Commands.FILE_LIVE_HIGHLIGHT).setEnabled(status === LiveDevImpl.STATUS_ACTIVE);
        });
    }

    function _updateHighlightCheckmark() {
        CommandManager.get(Commands.FILE_LIVE_HIGHLIGHT).setChecked(config.highlight);
    }

    function _handlePreviewHighlightCommand() {
        config.highlight = !config.highlight;
        _updateHighlightCheckmark();
        if (config.highlight) {
            LiveDevImpl.showHighlight();
        } else {
            LiveDevImpl.hideHighlight();
        }
        PreferencesManager.setViewState("livedev.highlight", config.highlight);
    }

    function _showStatusChangeReason(reason) {
        // Destroy the previous twipsy (options are not updated otherwise)
        _$btnGoLive.twipsy("hide").removeData("twipsy");

        // If there was no reason or the action was an explicit request by the user, don't show a twipsy
        if (!reason || reason === "explicit_close") {
            return;
        }

        // Translate the reason
        var translatedReason = Strings["LIVE_DEV_" + reason.toUpperCase()];
        if (!translatedReason) {
            translatedReason = StringUtils.format(Strings.LIVE_DEV_CLOSED_UNKNOWN_REASON, reason);
        }

        // Configure the twipsy
        var options = {
            placement: "left",
            trigger: "manual",
            autoHideDelay: 5000,
            title: function () {
                return translatedReason;
            }
        };

        // Show the twipsy with the explanation
        _$btnGoLive.twipsy(options).twipsy("show");
    }

    function _toggleLivePreviewMultiBrowser(value) {
        var val = _togglePref(PREF_MULTIBROWSER, value);

        CommandManager.get(Commands.TOGGLE_LIVE_PREVIEW_MB_MODE).setChecked(val);
        // Issue #10217: multi-browser does not support user server, so disable
        // the setting if it is enabled.
        CommandManager.get(Commands.FILE_PROJECT_SETTINGS).setEnabled(!val);
    }

    function _togglePref(key, value) {
        var val,
            oldPref = !!prefs.get(key);

        if (value === undefined) {
            val = !oldPref;
        } else {
            val = !!value;
        }

        // update menu
        if (val !== oldPref) {
            prefs.set(key, val);
        }

        return val;
    }