odoo.define('web_editor.ace', function (require) {
'use strict';

var ajax = require('web.ajax');
var core = require('web.core');
var Dialog = require("web.Dialog");
var Widget = require('web.Widget');
var base = require('web_editor.base');
var local_storage = require('web.local_storage');
var session = require("web.session");

var qweb = core.qweb;
var _t = core._t;

ajax.loadXML('/web_editor/static/src/xml/ace.xml', qweb);

function _getCheckReturn(isValid, errorLine, errorMessage) {
    return {
        isValid: isValid,
        error: isValid ? null : {
            line: errorLine,
            message: errorMessage,
        },
    };
}

function checkXML(xml) {
    if (typeof window.DOMParser != "undefined") {
        var xmlDoc = (new window.DOMParser()).parseFromString(xml, "text/xml");
        var error = xmlDoc.getElementsByTagName("parsererror");
        if (error.length > 0) {
            return _getCheckReturn(false, parseInt(error[0].innerHTML.match(/[Ll]ine[^\d]+(\d+)/)[1], 10), error[0].innerHTML);
        }
    } else if (typeof window.ActiveXObject != "undefined" && new window.ActiveXObject("Microsoft.XMLDOM")) {
        var xmlDocIE = new window.ActiveXObject("Microsoft.XMLDOM");
        xmlDocIE.async = "false";
        xmlDocIE.loadXML(xml);
        if (xmlDocIE.parseError.line > 0) {
            return _getCheckReturn(false, xmlDocIE.parseError.line, xmlDocIE.parseError.reason);
        }
    }
    return _getCheckReturn(true);
}

function formatXML(xml) {
    return window.vkbeautify.xml(xml, 4);
}

var checkLESS = (function () {
    var mapping = {
        '{': '}', '}': '{',
        '(': ')', ')': '(',
        '[': ']', ']': '[',
    };
    var openings = ['{', '(', '['];
    var closings = ['}', ')', ']'];

    return function (less) {
        var stack = [];
        var line = 1;
        for (var i = 0 ; i < less.length ; i++) {
            if (_.contains(openings, less[i])) {
                stack.push(less[i]);
            } else if (_.contains(closings, less[i])) {
                if (stack.pop() !== mapping[less[i]]) {
                    return _getCheckReturn(false, line, _t("Unexpected ") + less[i]);
                }
            } else if (less[i] === '\n') {
                line++;
            }
        }
        if (stack.length > 0) {
            return _getCheckReturn(false, line, _t("Expected ") + mapping[stack.pop()]);
        }
        return _getCheckReturn(true);
    };
})();

function formatLESS(less) {
    return less;
}

/**
 * The ViewEditor Widget allow to visualize resources (by default, XML views) and edit them.
 */
var ViewEditor = Widget.extend({
    template: 'web_editor.ace_view_editor',
    events: {
        "click .o_ace_type_switcher_choice": function (e) {
            e.preventDefault();
            this.switchType($(e.target).data("type"));
        },
        'change .o_res_list': function () {
            this.displayResource(this.selectedResource());
        },
        'click .js_include_bundles': function (e) {
            this.options.includeBundles = $(e.target).prop("checked");
            this.loadResources().then(this._updateViewSelectDOM.bind(this));
        },
        'click .js_include_all_less': function (e) {
            this.options.includeAllLess = $(e.target).prop("checked");
            this.loadResources().then(this._updateViewSelectDOM.bind(this));
        },
        'click button[data-action=save]': 'saveResources',
        "click button[data-action=\"reset\"]": function () {
            var self = this;
            Dialog.confirm(this, _t("If you reset this file, all your customizations will be lost as it will be reverted to the default file."), {
                title: _t("Careful !"),
                confirm_callback: function () {
                    self.resetResource(self.selectedResource());
                },
            });
        },
        'click button[data-action=format]': 'formatResource',
        'click button[data-action=close]': 'do_hide',
    },
    /**
     * The init method should initialize the parameters of which information the ace editor will
     * have to load.
     * @param parent: the parent element of the editor widget.
     * @param viewKey: xml_id of the view whose linked resources are to be loaded.
                Also allow to receive the id directly.
     * @param options: an object containing some options
     *          - initialResID: a specific view ID to load on start (otherwise the main view ID
     *              associated with the specified viewKey will be used).
     *          - includeBundles: whether or not the assets bundles templates needs to be loaded.
     */
    init: function (parent, viewKey, options) {
        this._super.apply(this, arguments);

        this.viewKey = viewKey;
        this.options = _.defaults({}, options, {
            position: 'right',
            doNotLoadViews: false,
            doNotLoadLess: false,
            includeBundles: false,
            includeAllLess: false,
            defaultBundlesRestriction: [],
        });

        this.resources = {xml: {}, less: {}};
        this.editingSessions = {xml: {}, less: {}};
        this.currentType = "xml";

        // Alias
        this.views = this.resources.xml;
        this.less = this.resources.less;
    },
    /**
     * The willStart method is in charge of loading everything the ace library needs to work.
     * It also loads the resources to visualize. See @loadResources.
     */
    willStart: function () {
        var js_def = ajax.loadJS('/web/static/lib/ace/ace.odoo-custom.js').then(function () {
            return $.when(
                ajax.loadJS('/web/static/lib/ace/mode-xml.js'),
                ajax.loadJS('/web/static/lib/ace/mode-less.js'),
                ajax.loadJS('/web/static/lib/ace/theme-monokai.js')
            );
        });
        return $.when(this._super.apply(this, arguments), js_def, this.loadResources());
    },
    /**
     * The start method is in charge of initializing the library and initial view once the DOM is
     * ready. It also initializes the resize feature of the ace editor.
     * @return a deferred which is resolved when the widget DOM content is fully loaded.
     */
    start: function () {
        this.$viewEditor = this.$("#ace-view-editor");
        this.$editor = this.$(".ace_editor");

        this.$typeSwitcherChoices = this.$(".o_ace_type_switcher_choice");
        this.$typeSwitcherBtn = this.$(".o_ace_type_switcher > .dropdown-toggle");

        this.$lists = {
            xml: this.$("#ace-view-list"),
            less: this.$("#ace-less-list")
        };
        this.$includeBundlesArea = this.$(".oe_include_bundles");
        this.$includeAllLessArea = this.$(".o_include_all_less");
        this.$viewID = this.$("#ace-view-id > span");

        this.$formatButton = this.$("button[data-action=\"format\"]");
        this.$resetButton = this.$("button[data-action=\"reset\"]");

        this.aceEditor = window.ace.edit(this.$viewEditor[0]);
        this.aceEditor.setTheme("ace/theme/monokai");

        var refX = 0;
        var resizing = false;
        var minWidth = 400;
        var debounceStoreEditorWidth = _.debounce(storeEditorWidth, 500);

        this._updateViewSelectDOM();

        var initResID;
        var initType;
        if (this.options.initialResID) {
            initResID = this.options.initialResID;
            initType = (_.isString(initResID) && initResID[0] === '/') ? "less" : "xml";
        } else {
            if (!this.options.doNotLoadLess) {
                initResID = this.sorted_less[0][1][0].url; // first bundle, less files, first one
                initType = "less";
            }
            if (!this.options.doNotLoadViews) {
                initResID = (typeof this.viewKey === "number" ? this.viewKey : _.findWhere(this.views, {xml_id: this.viewKey}).id);
                initType = "xml";
            }
        }
        if (initResID) {
            this.displayResource(initResID, initType);
        }

        if (!this.sorted_views.length || !this.sorted_less.length) {
            _.defer((function () {
                this.switchType(this.sorted_views.length ? "xml" : "less");
                this.$typeSwitcherBtn.parent(".btn-group").addClass("hidden");
            }).bind(this));
        }

        $(document).on("mouseup.ViewEditor", stopResizing.bind(this)).on("mousemove.ViewEditor", updateWidth.bind(this));
        if (this.options.position === 'left') {
            this.$('.ace_scroller').after($('<div>').addClass('ace_resize_bar'));
            this.$('.ace_gutter').css({'cursor': 'default'});
            this.$el.on("mousedown.ViewEditor", ".ace_resize_bar", startResizing.bind(this));
        } else {
            this.$el.on("mousedown.ViewEditor", ".ace_gutter", startResizing.bind(this));
        }

        resizeEditor.call(this, readEditorWidth.call(this));

        return this._super.apply(this, arguments);

        function resizeEditor(target) {
            var width = Math.min(document.body.clientWidth, Math.max(parseInt(target, 10), minWidth));
            this.$editor.width(width);
            this.aceEditor.resize();
            this.$el.width(width);
        }
        function storeEditorWidth() {
            local_storage.setItem('ace_editor_width', this.$el.width());
        }
        function readEditorWidth() {
            var width = local_storage.getItem('ace_editor_width');
            return parseInt(width || 720, 10);
        }
        function startResizing(e) {
            refX = e.pageX;
            resizing = true;
        }
        function stopResizing() {
            resizing = false;
        }
        function updateWidth(e) {
            if (!resizing) return;

            var offset = e.pageX - refX;
            if (this.options.position === 'left') {
                offset = - offset;
            }
            var width = this.$el.width() - offset;
            refX = e.pageX;
            resizeEditor.call(this, width);
            debounceStoreEditorWidth.call(this);
        }
    },
    /**
     * The destroy method unbinds custom events binded to the document element.
     */
    destroy: function () {
        this._super.apply(this, arguments);
        this.$el.off(".ViewEditor");
        $(document).off(".ViewEditor");
    },
    /**
     * The loadResources method is in charge of loading data the ace editor will vizualize
     * and of processing them.
     * Default behavior is loading the activate views, index them and build their hierarchy.
     * @return a deferred which is resolved once everything is loaded and processed.
     */
    loadResources: function () {
        // Reset resources
        this.resources = {xml: {}, less: {}};
        this.editingSessions = {xml: {}, less: {}};
        this.views = this.resources.xml;
        this.less = this.resources.less;

        // Load resources
        return ajax.jsonRpc("/web_editor/get_assets_editor_resources", "call", {
            key: this.viewKey,
            get_views: !this.options.doNotLoadViews,
            get_less: !this.options.doNotLoadLess,
            bundles: this.options.includeBundles,
            bundles_restriction: this.options.includeAllLess ? [] : this.options.defaultBundlesRestriction,
        }).then((function (resources) {
            _process_views.call(this, resources.views);
            _process_less.call(this, resources.less);
        }).bind(this));

        function _process_views(views) {
            // Only keep the active views and index them by ID.
            _.extend(this.views, _.indexBy(_.filter(views, function (view) {
                return view.active;
            }), "id"));

            // Initialize a 0 level for each view and assign them an array containing their children.
            var self = this;
            var roots = [];
            _.each(this.views, function (view) {
                view.level = 0;
                view.children = [];
            });
            _.each(this.views, function (view) {
                var parentId = view.inherit_id[0];
                var parent = parentId && self.views[parentId];
                if (parent) {
                    parent.children.push(view);
                } else {
                    roots.push(view);
                }
            });

            // Assign the correct level based on children key and save a sorted array where
            // each view is followed by their children.
            this.sorted_views = [];
            function visit(view, level) {
                view.level = level;
                self.sorted_views.push(view);
                _.each(view.children, function (child) {
                    visit(child, level + 1);
                });
            }
            _.each(roots, function (root) {
                visit(root, 0);
            });
        }

        function _process_less(less) {
            // The received less data is already sorted by bundle and DOM order
            this.sorted_less = less;

            // Store the URL ungrouped by bundle and use the URL as key (resource ID)
            var self = this;
            _.each(less, function (bundleInfos) {
                _.each(bundleInfos[1], function (info) { info.bundle_xmlid = bundleInfos[0].xmlid; });
                _.extend(self.less, _.indexBy(bundleInfos[1], "url"));
            });
        }
    },
    /**
     * The private _updateViewSelectDOM method purpose is to render the content of the view/file
     * select DOM element according to current widget data.
     */
    _updateViewSelectDOM: function () {
        var currentId = this.selectedResource();

        var self = this;
        this.$lists.xml.empty();
        _.each(this.sorted_views, function (view) {
            self.$lists.xml.append($("<option/>", {
                value: view.id,
                text: view.name,
                selected: currentId === view.id,
                "data-level": view.level,
                "data-debug": view.xml_id,
            }));
        });

        this.$lists.less.empty();
        _.each(this.sorted_less, function (bundleInfos) {
            var $optgroup = $("<optgroup/>", {
                label: bundleInfos[0].name,
            }).appendTo(self.$lists.less);
            _.each(bundleInfos[1], function (lessInfo) {
                var name = lessInfo.url.substring(_.lastIndexOf(lessInfo.url, "/") + 1, lessInfo.url.length - 5);
                $optgroup.append($("<option/>", {
                    value: lessInfo.url,
                    text: name,
                    selected: currentId === lessInfo.url,
                    "data-debug": lessInfo.url,
                    "data-customized": lessInfo.customized
                }));
            });
        });

        this.$lists.xml.select2("destroy");
        this.$lists.xml.select2({
            formatResult: _formatDisplay,
            formatSelection: _formatDisplay,
        });
        this.$lists.less.select2("destroy");
        this.$lists.less.select2({
            formatResult: _formatDisplay,
            formatSelection: _formatDisplay,
        });

        function _formatDisplay(data) {
            var $elem = $(data.element);

            var $div = $("<div/>",  {
                text: data.text || "",
                style: "padding: 0 0 0 " + (24 * $elem.data("level")) + "px",
            });

            if ($elem.data("dirty") || $elem.data("customized")) {
                $div.prepend($("<span/>", {
                    class: "fa fa-floppy-o " + ($elem.data("dirty") ? "text-warning" : "text-success"),
                    style: "margin-right: 8px;",
                }));
            }

            if (session.debug && $elem.data("debug")) {
                $div.append($("<span/>", {
                    text: " (" + $elem.data("debug") + ")",
                    class: "text-muted",
                    style: "font-size: 80%",
                }));
            }

            return $div;
        }
    },
    /**
     * The switchType method switches to the LESS or XML edition. Calling this method will adapt all DOM elements to
     * keep the editor consistent.
     * @param type: either "xml" or "less"
     */
    switchType: function (type) {
        this.currentType = type;
        this.$typeSwitcherBtn.html(this.$typeSwitcherChoices.filter("[data-type=\"" + type + "\"]").html());
        _.each(this.$lists, function ($list, _type) { $list.toggleClass("hidden", type !== _type); });
        this.$lists[type].change();

        this.$includeBundlesArea.toggleClass("hidden", this.currentType === "less" || !session.debug);
        this.$includeAllLessArea.toggleClass("hidden", this.currentType === "xml" || !session.debug || this.options.defaultBundlesRestriction.length === 0);
        this.$formatButton.toggleClass("hidden", this.currentType === "less");
    },
    /**
     * The selectedResource method returns the currently selected resource id (view ID or less file URL).
     * @return the currently resource id (view ID or less file URL)
     */
    selectedResource: function () {
        return this.$lists[this.currentType].select2("val");
    },
    /**
     * The displayResource method forces the view/less file identified by its ID/URL to be displayed in the editor.
     * The method will update the resource select DOM element as well.
     * @param resID: the ID/URL of the view/less file to display
     * @param type: the type of resource (either "xml" or "less")
     */
    displayResource: function (resID, type) {
        if (type) this.switchType(type);

        var editingSession = this.editingSessions[this.currentType][resID];
        if (!editingSession) {
            editingSession = this.editingSessions[this.currentType][resID] = this._buildEditingSession(resID);
        }
        this.aceEditor.setSession(editingSession);

        if (this.currentType === "xml") {
            this.$viewID.text(_.str.sprintf(_t("Template ID: %s"), this.views[resID].xml_id));
        } else {
            this.$viewID.text(_.str.sprintf(_t("Less file: %s"), resID));
        }
        this.$lists[this.currentType].select2("val", resID);

        this.$resetButton.toggleClass("hidden", this.currentType === "xml" || !this.less[resID].customized);
    },
    /**
     * The resetResource method forces the view/less file identified by its ID/URL to be reset to the way it was before
     * the user started editing it. TODO view reset is not supported yet
     * @param resID: the ID/URL of the view/less file to reset (default to the currently selected one)
     * @param type: the type of the resource to reset (default to the currently selected one)
     * @return a deferred which is resolved once the resource has been reset
     */
    resetResource: function (resID, type) {
        resID = resID || this.selectedResource();
        type = type || this.currentType;

        if (this.currentType === "xml") {
            return $.Defered().reject(_t("Reseting views is not supported yet")); // TODO
        } else {
            return ajax.jsonRpc("/web_editor/reset_less", "call", {
                url: resID,
                bundle_xmlid: this.less[resID].bundle_xmlid,
            });
        }
    },
    /**
     * The private _buildEditingSession method initializes a text editor for the specified resource.
     * @param resID: the ID/URL of the view/less file whose text editor it will be
     * @param type: the type of the given resource (default to the currently selected one)
     * @return an ace.EditSession object linked to the specified resID.
     */
    _buildEditingSession: function(resID, type) {
        var self = this;
        type = type || this.currentType;
        var editingSession = new window.ace.EditSession(this.resources[type][resID].arch);
        editingSession.setUseWorker(false);
        editingSession.setMode("ace/mode/" + (type || this.currentType));
        editingSession.setUndoManager(new window.ace.UndoManager());
        editingSession.on("change", function () {
            _.defer(function () {
                self._toggleDirtyInfo(resID);
                self._showErrorLine();
            });
        });
        return editingSession;
    },
    /**
     * The private _toggleDirtyInfo method update the select option DOM element associated with
     * a particular resID to indicate if the option is dirty or not.
     * @param resID: the ID/URL of the view/less file whose option has to be updated
     * @param type: the type of the given resource (default to the currently selected one)
     * @param isDirty: a boolean to indicate if the view is dirty or not ; default to content of UndoManager
     */
    _toggleDirtyInfo: function (resID, type, isDirty) {
        type = type || this.currentType;

        if (!resID || !this.editingSessions[type][resID]) return;

        var $option = this.$lists[type].find("[value='" + resID + "']");
        if (isDirty === undefined) {
            isDirty = this.editingSessions[type][resID].getUndoManager().hasUndo();
        }
        $option.data("dirty", isDirty);
    },
    /**
     * The formatResource method formats the current resource being vizualized.
     * TODO formatting LESS files is not supported yet.
     */
    formatResource: function () {
        var res = this.aceEditor.getValue();
        var check = (this.currentType === "xml" ? checkXML : checkLESS)(res);
        if (check.isValid) {
            this.aceEditor.setValue((this.currentType === "xml" ? formatXML : formatLESS)(res));
        } else {
            this._showErrorLine(check.error.line, check.error.message, this.selectedResource());
        }
    },
    /**
     * The saveResources method is in charge of saving every resource that has been modified.
     * If one cannot be saved, none is saved and an error message is displayed.
     * @return a deferred whose status indicates if the save is finished or if an error occured.
     */
    saveResources: function () {
        var toSave = {};
        var errorFound = false;
        _.each(this.editingSessions, (function (editingSessions, type) {
            if (errorFound) return;

            var dirtySessions = _.pick(editingSessions, function (session) {
                return session.getUndoManager().hasUndo();
            });
            toSave[type] = _.map(dirtySessions, function (session, resID) {
                return {
                    id: parseInt(resID, 10) || resID,
                    text: session.getValue(),
                };
            });

            this._showErrorLine();
            for (var i = 0 ; i < toSave[type].length && !errorFound ; i++) {
                var check = (type === "xml" ? checkXML : checkLESS)(toSave[type][i].text);
                if (!check.isValid) {
                    this._showErrorLine(check.error.line, check.error.message, toSave[type][i].id, type);
                    errorFound = toSave[type][i];
                }
            }
        }).bind(this));
        if (errorFound) return $.Deferred().reject(errorFound);

        var defs = [];
        _.each(toSave, (function (_toSave, type) {
            defs = defs.concat(_.map(_toSave, (type === "xml" ? this._saveView : this._saveLess).bind(this)));
        }).bind(this));

        return $.when.apply($, defs).fail((function (session, error) {
            Dialog.alert(this, "", {
                title: _t("Server error"),
                $content: $("<div/>").html(
                    _t("A server error occured. Please check you correctly signed in and that the file you are saving is well-formed.")
                    + "<br/>"
                    + error
                )
            });
        }).bind(this));
    },
    /**
     * The private _saveView method is in charge of saving an unique XML view.
     * @param session: an object which contains the "id" and the "text" of the view to save.
     * @return a deferred whose status indicates if the save is finished or if an error occured.
     */
    _saveView: function (session) {
        var def = $.Deferred();

        var self = this;
        ajax.jsonRpc('/web/dataset/call', 'call', {
            model: 'ir.ui.view',
            method: 'write',
            args: [[session.id], {arch: session.text}, _.extend(base.get_context(), {lang: null})],
        }).then(function () {
            self._toggleDirtyInfo(session.id, "xml", false);
            def.resolve();
        }, function (source, error) {
            def.reject(session, error);
        });

        return def;
    },
    /**
     * The private _saveLess method is in charge of saving an unique LESS file.
     * @param session: an object which contains the "id" (url) and the "text" of the view to save.
     * @return a deferred whose status indicates if the save is finished or if an error occured.
     */
    _saveLess: function (session) {
        var def = $.Deferred();

        var self = this;
        ajax.jsonRpc("/web_editor/save_less", "call", {
            url: session.id,
            bundle_xmlid: this.less[session.id].bundle_xmlid,
            content: session.text,
        }).then(function () {
            self._toggleDirtyInfo(session.id, "less", false);
            def.resolve();
        }, function (source, error) {
            def.reject(session, error);
        });

        return def;
    },
    /**
     * The private _showErrorLine method is designed to show a line which produced an error. Red color
     * is added to the editor, the cursor move to the line and a message is opened on click on the line
     * number. If the _showErrorLine is called without argument, the effects are removed.
     * @param line: the line number to highlight
     * @param message: the message to show on click on the line number
     * @param resID: the ID/URL of the view/less file whose line is to highlight
     * @param type: the type of the given resource
     */
    _showErrorLine: function (line, message, resID, type) {
        if (line === undefined || line <= 0) {
            if (this.$errorLine) {
                this.$errorLine.removeClass("o_error");
                this.$errorLine.off(".o_error");
                this.$errorLine = undefined;
                this.$errorContent.removeClass("o_error");
                this.$errorContent = undefined;
            }
            return;
        }

        if (type) this.switchType(type);

        if (this.selectedResource() === resID) {
            __showErrorLine.call(this, line);
        } else {
            var onChangeSession = (function () {
                this.aceEditor.off("changeSession", onChangeSession);
                _.delay(__showErrorLine.bind(this, line), 400);
            }).bind(this);
            this.aceEditor.on('changeSession', onChangeSession);
            this.displayResource(resID, this.currentType);
        }

        function __showErrorLine(line) {
            this.aceEditor.gotoLine(line);
            this.$errorLine = this.$viewEditor.find(".ace_gutter-cell").filter(function () {
                return parseInt($(this).text()) === line;
            }).addClass("o_error");
            this.$errorLine.addClass("o_error").on("click.o_error", function () {
                var $message = $("<div/>").html(message);
                $message.text($message.text());
                Dialog.alert(this, "", {$content: $message});
            });
            this.$errorContent = this.$viewEditor.find(".ace_scroller").addClass("o_error");
        }
    },
});

return ViewEditor;
});