/**
 * Copyright JS Foundation and other contributors, http://js.foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/
RED.library = (function() {

    var exportToLibraryDialog;
    var elementPrefix = "node-input-";

    function loadFlowLibrary() {
        $.getJSON("library/flows",function(data) {
            //console.log(data);

            var buildMenu = function(data,root) {
                var i;
                var li;
                var a;
                var ul = document.createElement("ul");
                if (root === "") {
                    ul.id = "menu-item-import-library-submenu";
                }
                ul.className = "dropdown-menu";
                if (data.d) {
                    for (i in data.d) {
                        if (data.d.hasOwnProperty(i)) {
                            li = document.createElement("li");
                            li.className = "dropdown-submenu pull-left";
                            a = document.createElement("a");
                            a.href="#";
                            var label = i.replace(/^@.*\//,"").replace(/^node-red-contrib-/,"").replace(/^node-red-node-/,"").replace(/-/," ").replace(/_/," ");
                            a.innerHTML = label;
                            li.appendChild(a);
                            li.appendChild(buildMenu(data.d[i],root+(root!==""?"/":"")+i));
                            ul.appendChild(li);
                        }
                    }
                }
                if (data.f) {
                    for (i in data.f) {
                        if (data.f.hasOwnProperty(i)) {
                            li = document.createElement("li");
                            a = document.createElement("a");
                            a.href="#";
                            a.innerHTML = data.f[i];
                            a.flowName = root+(root!==""?"/":"")+data.f[i];
                            a.onclick = function() {
                                $.get('library/flows/'+this.flowName, function(data) {
                                    RED.view.importNodes(data);
                                });
                            };
                            li.appendChild(a);
                            ul.appendChild(li);
                        }
                    }
                }
                return ul;
            };
            var examples;
            if (data.d && data.d._examples_) {
                examples = data.d._examples_;
                delete data.d._examples_;
            }
            var menu = buildMenu(data,"");
            $("#menu-item-import-examples").remove();
            if (examples) {
                RED.menu.addItem("menu-item-import",{id:"menu-item-import-examples",label:RED._("menu.label.examples"),options:[]})
                $("#menu-item-import-examples-submenu").replaceWith(buildMenu(examples,"_examples_"));
            }
            //TODO: need an api in RED.menu for this
            $("#menu-item-import-library-submenu").replaceWith(menu);
        });
    }

    function createUI(options) {
        var libraryData = {};
        var selectedLibraryItem = null;
        var libraryEditor = null;
        elementPrefix = options.elementPrefix || "node-input-";

        // Orion editor has set/getText
        // ACE editor has set/getValue
        // normalise to set/getValue
        if (options.editor.setText) {
            // Orion doesn't like having pos passed in, so proxy the call to drop it
            options.editor.setValue = function(text,pos) {
                options.editor.setText.call(options.editor,text);
            }
        }
        if (options.editor.getText) {
            options.editor.getValue = options.editor.getText;
        }

        function buildFileListItem(item) {
            var li = document.createElement("li");
            li.onmouseover = function(e) { $(this).addClass("list-hover"); };
            li.onmouseout = function(e) { $(this).removeClass("list-hover"); };
            return li;
        }

        function buildFileList(root,data) {
            var ul = document.createElement("ul");
            var li;
            for (var i=0; i<data.length; i++) {
                var v = data[i];
                if (typeof v === "string") {
                    // directory
                    li = buildFileListItem(v);
                    li.onclick = (function () {
                        var dirName = v;
                        return function(e) {
                            var bcli = $('<li class="active"><span class="divider">/</span> <a href="#">'+dirName+'</a></li>');
                            $("a",bcli).click(function(e) {
                                $(this).parent().nextAll().remove();
                                $.getJSON("library/"+options.url+root+dirName,function(data) {
                                    $("#node-select-library").children().first().replaceWith(buildFileList(root+dirName+"/",data));
                                });
                                e.stopPropagation();
                            });
                            var bc = $("#node-dialog-library-breadcrumbs");
                            $(".active",bc).removeClass("active");
                            bc.append(bcli);
                            $.getJSON("library/"+options.url+root+dirName,function(data) {
                                $("#node-select-library").children().first().replaceWith(buildFileList(root+dirName+"/",data));
                            });
                        }
                    })();
                    li.innerHTML = '<i class="fa fa-folder"></i> '+v+"</i>";
                    ul.appendChild(li);
                } else {
                    // file
                    li = buildFileListItem(v);
                    li.innerHTML = v.name;
                    li.onclick = (function() {
                        var item = v;
                        return function(e) {
                            $(".list-selected",ul).removeClass("list-selected");
                            $(this).addClass("list-selected");
                            $.get("library/"+options.url+root+item.fn, function(data) {
                                selectedLibraryItem = item;
                                libraryEditor.setValue(data,-1);
                            });
                        }
                    })();
                    ul.appendChild(li);
                }
            }
            return ul;
        }

        $('#'+elementPrefix+"name").css("width","calc(100% - 52px)").after(
            '<div class="btn-group" style="margin-left:5px;">'+
            '<a id="node-input-'+options.type+'-lookup" class="editor-button" data-toggle="dropdown"><i class="fa fa-book"></i> <i class="fa fa-caret-down"></i></a>'+
            '<ul class="dropdown-menu pull-right" role="menu">'+
            '<li><a id="node-input-'+options.type+'-menu-open-library" tabindex="-1" href="#">'+RED._("library.openLibrary")+'</a></li>'+
            '<li><a id="node-input-'+options.type+'-menu-save-library" tabindex="-1" href="#">'+RED._("library.saveToLibrary")+'</a></li>'+
            '</ul></div>'
        );

        $('#node-input-'+options.type+'-menu-open-library').click(function(e) {
            $("#node-select-library").children().remove();
            var bc = $("#node-dialog-library-breadcrumbs");
            bc.children().first().nextAll().remove();
            libraryEditor.setValue('',-1);

            $.getJSON("library/"+options.url,function(data) {
                $("#node-select-library").append(buildFileList("/",data));
                $("#node-dialog-library-breadcrumbs a").click(function(e) {
                    $(this).parent().nextAll().remove();
                    $("#node-select-library").children().first().replaceWith(buildFileList("/",data));
                    e.stopPropagation();
                });
                $( "#node-dialog-library-lookup" ).dialog( "open" );
            });

            e.preventDefault();
        });

        $('#node-input-'+options.type+'-menu-save-library').click(function(e) {
            //var found = false;
            var name = $("#"+elementPrefix+"name").val().replace(/(^\s*)|(\s*$)/g,"");

            //var buildPathList = function(data,root) {
            //    var paths = [];
            //    if (data.d) {
            //        for (var i in data.d) {
            //            var dn = root+(root==""?"":"/")+i;
            //            var d = {
            //                label:dn,
            //                files:[]
            //            };
            //            for (var f in data.d[i].f) {
            //                d.files.push(data.d[i].f[f].fn.split("/").slice(-1)[0]);
            //            }
            //            paths.push(d);
            //            paths = paths.concat(buildPathList(data.d[i],root+(root==""?"":"/")+i));
            //        }
            //    }
            //    return paths;
            //};
            $("#node-dialog-library-save-folder").attr("value","");

            var filename = name.replace(/[^\w-]/g,"-");
            if (filename === "") {
                filename = "unnamed-"+options.type;
            }
            $("#node-dialog-library-save-filename").attr("value",filename+".js");

            //var paths = buildPathList(libraryData,"");
            //$("#node-dialog-library-save-folder").autocomplete({
            //        minLength: 0,
            //        source: paths,
            //        select: function( event, ui ) {
            //            $("#node-dialog-library-save-filename").autocomplete({
            //                    minLength: 0,
            //                    source: ui.item.files
            //            });
            //        }
            //});

            $( "#node-dialog-library-save" ).dialog( "open" );
            e.preventDefault();
        });

        libraryEditor = ace.edit('node-select-library-text');
        libraryEditor.setTheme("ace/theme/tomorrow");
        if (options.mode) {
            libraryEditor.getSession().setMode(options.mode);
        }
        libraryEditor.setOptions({
            readOnly: true,
            highlightActiveLine: false,
            highlightGutterLine: false
        });
        libraryEditor.renderer.$cursorLayer.element.style.opacity=0;
        libraryEditor.$blockScrolling = Infinity;

        $( "#node-dialog-library-lookup" ).dialog({
            title: RED._("library.typeLibrary", {type:options.type}),
            modal: true,
            autoOpen: false,
            width: 800,
            height: 450,
            buttons: [
                {
                    text: RED._("common.label.cancel"),
                    click: function() {
                        $( this ).dialog( "close" );
                    }
                },
                {
                    text: RED._("common.label.load"),
                    class: "primary",
                    click: function() {
                        if (selectedLibraryItem) {
                            for (var i=0; i<options.fields.length; i++) {
                                var field = options.fields[i];
                                $("#"+elementPrefix+field).val(selectedLibraryItem[field]);
                            }
                            options.editor.setValue(libraryEditor.getValue(),-1);
                        }
                        $( this ).dialog( "close" );
                    }
                }
            ],
            open: function(e) {
                var form = $("form",this);
                form.height(form.parent().height()-30);
                $("#node-select-library-text").height("100%");
                $(".form-row:last-child",form).children().height(form.height()-60);
            },
            resize: function(e) {
                var form = $("form",this);
                form.height(form.parent().height()-30);
                $(".form-row:last-child",form).children().height(form.height()-60);
            }
        });

        function saveToLibrary(overwrite) {
            var name = $("#"+elementPrefix+"name").val().replace(/(^\s*)|(\s*$)/g,"");
            if (name === "") {
                name = RED._("library.unnamedType",{type:options.type});
            }
            var filename = $("#node-dialog-library-save-filename").val().replace(/(^\s*)|(\s*$)/g,"");
            var pathname = $("#node-dialog-library-save-folder").val().replace(/(^\s*)|(\s*$)/g,"");
            if (filename === "" || !/.+\.js$/.test(filename)) {
                RED.notify(RED._("library.invalidFilename"),"warning");
                return;
            }
            var fullpath = pathname+(pathname===""?"":"/")+filename;
            if (!overwrite) {
                //var pathnameParts = pathname.split("/");
                //var exists = false;
                //var ds = libraryData;
                //for (var pnp in pathnameParts) {
                //    if (ds.d && pathnameParts[pnp] in ds.d) {
                //        ds = ds.d[pathnameParts[pnp]];
                //    } else {
                //        ds = null;
                //        break;
                //    }
                //}
                //if (ds && ds.f) {
                //    for (var f in ds.f) {
                //        if (ds.f[f].fn == fullpath) {
                //            exists = true;
                //            break;
                //        }
                //    }
                //}
                //if (exists) {
                //    $("#node-dialog-library-save-content").html(RED._("library.dialogSaveOverwrite",{libraryType:options.type,libraryName:fullpath}));
                //    $("#node-dialog-library-save-confirm").dialog( "open" );
                //    return;
                //}
            }
            var queryArgs = [];
            var data = {};
            for (var i=0; i<options.fields.length; i++) {
                var field = options.fields[i];
                if (field == "name") {
                    data.name = name;
                } else {
                    data[field] = $("#"+elementPrefix+field).val();
                }
            }

            data.text = options.editor.getValue();
            $.ajax({
                url:"library/"+options.url+'/'+fullpath,
                type: "POST",
                data: JSON.stringify(data),
                contentType: "application/json; charset=utf-8"
            }).done(function(data,textStatus,xhr) {
                RED.notify(RED._("library.savedType", {type:options.type}),"success");
            }).fail(function(xhr,textStatus,err) {
                if (xhr.status === 401) {
                    RED.notify(RED._("library.saveFailed",{message:RED._("user.notAuthorized")}),"error");
                } else {
                    RED.notify(RED._("library.saveFailed",{message:xhr.responseText}),"error");
                }
            });
        }
        $( "#node-dialog-library-save-confirm" ).dialog({
            title: RED._("library.saveToLibrary"),
            modal: true,
            autoOpen: false,
            width: 530,
            height: 230,
            buttons: [
                {
                    text: RED._("common.label.cancel"),
                    click: function() {
                        $( this ).dialog( "close" );
                    }
                },
                {
                    text: RED._("common.label.save"),
                    class: "primary",
                    click: function() {
                        saveToLibrary(true);
                        $( this ).dialog( "close" );
                    }
                }
            ]
        });
        $( "#node-dialog-library-save" ).dialog({
            title: RED._("library.saveToLibrary"),
            modal: true,
            autoOpen: false,
            width: 530,
            height: 230,
            buttons: [
                {
                    text: RED._("common.label.cancel"),
                    click: function() {
                        $( this ).dialog( "close" );
                    }
                },
                {
                    text: RED._("common.label.save"),
                    class: "primary",
                    click: function() {
                        saveToLibrary(false);
                        $( this ).dialog( "close" );
                    }
                }
            ]
        });

    }

    function exportFlow() {
        //TODO: don't rely on the main dialog
        var nns = RED.nodes.createExportableNodeSet(RED.view.selection().nodes);
        $("#node-input-library-filename").attr('nodes',JSON.stringify(nns));
        exportToLibraryDialog.dialog( "open" );
    }

    return {
        init: function() {

            RED.actions.add("core:library-export",exportFlow);

            RED.events.on("view:selection-changed",function(selection) {
                if (!selection.nodes) {
                    RED.menu.setDisabled("menu-item-export-library",true);
                } else {
                    RED.menu.setDisabled("menu-item-export-library",false);
                }
            });

            if (RED.settings.theme("menu.menu-item-import-library") !== false) {
                loadFlowLibrary();
            }

            exportToLibraryDialog = $('<div id="library-dialog" class="hide"><form class="dialog-form form-horizontal"></form></div>')
                .appendTo("body")
                .dialog({
                    modal: true,
                    autoOpen: false,
                    width: 500,
                    resizable: false,
                    title: RED._("library.exportToLibrary"),
                    buttons: [
                        {
                            id: "library-dialog-cancel",
                            text: RED._("common.label.cancel"),
                            click: function() {
                                $( this ).dialog( "close" );
                            }
                        },
                        {
                            id: "library-dialog-ok",
                            class: "primary",
                            text: RED._("common.label.export"),
                            click: function() {
                                //TODO: move this to RED.library
                                var flowName = $("#node-input-library-filename").val();
                                flowName = flowName.trim();
                                if(flowName === "" || flowName.endsWith("/")) {
                                    RED.notify(RED._("library.invalidFilename"),"warning");
                                } else {
                                    $.ajax({
                                        url:'library/flows/'+flowName,
                                        type: "POST",
                                        data: $("#node-input-library-filename").attr('nodes'),
                                        contentType: "application/json; charset=utf-8"
                                    }).done(function() {
                                        RED.library.loadFlowLibrary();
                                        RED.notify(RED._("library.savedNodes"),"success");
                                    }).fail(function(xhr,textStatus,err) {
                                        if (xhr.status === 401) {
                                            RED.notify(RED._("library.saveFailed",{message:RED._("user.notAuthorized")}),"error");
                                        } else {
                                            RED.notify(RED._("library.saveFailed",{message:xhr.responseText}),"error");
                                        }
                                    });
                                }
                                $( this ).dialog( "close" );
                            }
                        }
                    ],
                    open: function(e) {
                        $(this).parent().find(".ui-dialog-titlebar-close").hide();
                    },
                    close: function(e) {
                    }
                });
            exportToLibraryDialog.children(".dialog-form").append($(
                '<div class="form-row">'+
                '<label for="node-input-library-filename" data-i18n="[append]editor:library.filename"><i class="fa fa-file"></i> </label>'+
                '<input type="text" id="node-input-library-filename" data-i18n="[placeholder]editor:library.fullFilenamePlaceholder">'+
                '<input type="text" style="display: none;" />'+ // Second hidden input to prevent submit on Enter
                '</div>'
            ));
        },
        create: createUI,
        loadFlowLibrary: loadFlowLibrary,

        export: exportFlow
    }
})();