/**
 * 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.clipboard = (function() {

    var dialog;
    var dialogContainer;
    var exportNodesDialog;
    var importNodesDialog;
    var disabled = false;

    function setupDialogs() {
        dialog = $('<div id="clipboard-dialog" class="hide node-red-dialog"><form class="dialog-form form-horizontal"></form></div>')
            .appendTo("body")
            .dialog({
                modal: true,
                autoOpen: false,
                width: 500,
                resizable: false,
                buttons: [
                    {
                        id: "clipboard-dialog-cancel",
                        text: RED._("common.label.cancel"),
                        click: function() {
                            $( this ).dialog( "close" );
                        }
                    },
                    {
                        id: "clipboard-dialog-close",
                        class: "primary",
                        text: RED._("common.label.close"),
                        click: function() {
                            $( this ).dialog( "close" );
                        }
                    },
                    {
                        id: "clipboard-dialog-copy",
                        class: "primary",
                        text: RED._("clipboard.export.copy"),
                        click: function() {
                            $("#clipboard-export").select();
                            document.execCommand("copy");
                            document.getSelection().removeAllRanges();
                            RED.notify(RED._("clipboard.nodesExported"));
                            $( this ).dialog( "close" );
                        }
                    },
                    {
                        id: "clipboard-dialog-ok",
                        class: "primary",
                        text: RED._("common.label.import"),
                        click: function() {
                            RED.view.importNodes($("#clipboard-import").val(),$("#import-tab > a.selected").attr('id') === 'import-tab-new');
                            $( this ).dialog( "close" );
                        }
                    }
                ],
                open: function(e) {
                    $(this).parent().find(".ui-dialog-titlebar-close").hide();
                },
                close: function(e) {
                }
            });

        dialogContainer = dialog.children(".dialog-form");

        exportNodesDialog =
            '<div class="form-row">'+
                '<label style="width:auto;margin-right: 10px;" data-i18n="clipboard.export.copy"></label>'+
                '<span id="export-range-group" class="button-group">'+
                    '<a id="export-range-selected" class="editor-button toggle" href="#" data-i18n="clipboard.export.selected"></a>'+
                    '<a id="export-range-flow" class="editor-button toggle" href="#" data-i18n="clipboard.export.current"></a>'+
                    '<a id="export-range-full" class="editor-button toggle" href="#" data-i18n="clipboard.export.all"></a>'+
                '</span>'+
                '</div>'+
            '<div class="form-row">'+
                '<textarea readonly style="resize: none; width: 100%; border-radius: 4px;font-family: monospace; font-size: 12px; background:#f3f3f3; padding-left: 0.5em; box-sizing:border-box;" id="clipboard-export" rows="5"></textarea>'+
            '</div>'+
            '<div class="form-row" style="text-align: right;">'+
                '<span id="export-format-group" class="button-group">'+
                    '<a id="export-format-mini" class="editor-button editor-button-small toggle" href="#" data-i18n="clipboard.export.compact"></a>'+
                    '<a id="export-format-full" class="editor-button editor-button-small toggle" href="#" data-i18n="clipboard.export.formatted"></a>'+
                '</span>'+
            '</div>';

        importNodesDialog = '<div class="form-row">'+
            '<textarea style="resize: none; width: 100%; border-radius: 0px;font-family: monospace; font-size: 12px; background:#eee; padding-left: 0.5em; box-sizing:border-box;" id="clipboard-import" rows="5" placeholder="'+
            RED._("clipboard.pasteNodes")+
            '"></textarea>'+
            '</div>'+
            '<div class="form-row">'+
            '<label style="width:auto;margin-right: 10px;" data-i18n="clipboard.import.import"></label>'+
            '<span id="import-tab" class="button-group">'+
                '<a id="import-tab-current" class="editor-button toggle selected" href="#" data-i18n="clipboard.export.current"></a>'+
                '<a id="import-tab-new" class="editor-button toggle" href="#" data-i18n="clipboard.import.newFlow"></a>'+
            '</span>'+
            '</div>';
    }

    function validateImport() {
        var importInput = $("#clipboard-import");
        var v = importInput.val();
        v = v.substring(v.indexOf('['),v.lastIndexOf(']')+1);
        try {
            JSON.parse(v);
            importInput.removeClass("input-error");
            importInput.val(v);
            $("#clipboard-dialog-ok").button("enable");
        } catch(err) {
            if (v !== "") {
                importInput.addClass("input-error");
            }
            $("#clipboard-dialog-ok").button("disable");
        }
    }

    function importNodes() {
        if (disabled) {
            return;
        }
        dialogContainer.empty();
        dialogContainer.append($(importNodesDialog));
        dialogContainer.i18n();

        $("#clipboard-dialog-ok").show();
        $("#clipboard-dialog-cancel").show();
        $("#clipboard-dialog-close").hide();
        $("#clipboard-dialog-copy").hide();
        $("#clipboard-dialog-ok").button("disable");
        $("#clipboard-import").keyup(validateImport);
        $("#clipboard-import").on('paste',function() { setTimeout(validateImport,10)});

        $("#import-tab > a").click(function(evt) {
            evt.preventDefault();
            if ($(this).hasClass('disabled') || $(this).hasClass('selected')) {
                return;
            }
            $(this).parent().children().removeClass('selected');
            $(this).addClass('selected');
        });

        dialog.dialog("option","title",RED._("clipboard.importNodes")).dialog("open");
    }

    function exportNodes() {
        if (disabled) {
            return;
        }

        dialogContainer.empty();
        dialogContainer.append($(exportNodesDialog));
        dialogContainer.i18n();
        var format = RED.settings.flowFilePretty ? "export-format-full" : "export-format-mini";

        $("#export-format-group > a").click(function(evt) {
            evt.preventDefault();
            if ($(this).hasClass('disabled') || $(this).hasClass('selected')) {
                $("#clipboard-export").focus();
                return;
            }
            $(this).parent().children().removeClass('selected');
            $(this).addClass('selected');

            var flow = $("#clipboard-export").val();
            if (flow.length > 0) {
                var nodes = JSON.parse(flow);

                format = $(this).attr('id');
                if (format === 'export-format-full') {
                    flow = JSON.stringify(nodes,null,4);
                } else {
                    flow = JSON.stringify(nodes);
                }
                $("#clipboard-export").val(flow);
                $("#clipboard-export").focus();
            }
        });

        $("#export-range-group > a").click(function(evt) {
            evt.preventDefault();
            if ($(this).hasClass('disabled') || $(this).hasClass('selected')) {
                $("#clipboard-export").focus();
                return;
            }
            $(this).parent().children().removeClass('selected');
            $(this).addClass('selected');
            var type = $(this).attr('id');
            var flow = "";
            var nodes = null;
            if (type === 'export-range-selected') {
                var selection = RED.view.selection();
                nodes = RED.nodes.createExportableNodeSet(selection.nodes);
            } else if (type === 'export-range-flow') {
                var activeWorkspace = RED.workspaces.active();
                nodes = RED.nodes.filterNodes({z:activeWorkspace});
                var parentNode = RED.nodes.workspace(activeWorkspace)||RED.nodes.subflow(activeWorkspace);
                nodes.unshift(parentNode);
                nodes = RED.nodes.createExportableNodeSet(nodes);
            } else if (type === 'export-range-full') {
                nodes = RED.nodes.createCompleteNodeSet(false);
            }
            if (nodes !== null) {
                if (format === "export-format-full") {
                    flow = JSON.stringify(nodes,null,4);
                } else {
                    flow = JSON.stringify(nodes);
                }
            }
            if (flow.length > 0) {
                $("#export-copy").removeClass('disabled');
            } else {
                $("#export-copy").addClass('disabled');
            }
            $("#clipboard-export").val(flow);
            $("#clipboard-export").focus();
        })

        $("#clipboard-dialog-ok").hide();
        $("#clipboard-dialog-cancel").hide();
        $("#clipboard-dialog-copy").hide();
        $("#clipboard-dialog-close").hide();
        var selection = RED.view.selection();
        if (selection.nodes) {
            $("#export-range-selected").click();
        } else {
            $("#export-range-selected").addClass('disabled').removeClass('selected');
            $("#export-range-flow").click();
        }
        if (format === "export-format-full") {
            $("#export-format-full").click();
        } else {
            $("#export-format-mini").click();
        }
        $("#clipboard-export")
            .focus(function() {
                var textarea = $(this);
                textarea.select();
                textarea.mouseup(function() {
                    textarea.unbind("mouseup");
                    return false;
                })
            });
        dialog.dialog("option","title",RED._("clipboard.exportNodes")).dialog( "open" );

        $("#clipboard-export").focus();
        if (!document.queryCommandSupported("copy")) {
            $("#clipboard-dialog-cancel").hide();
            $("#clipboard-dialog-close").show();
        } else {
            $("#clipboard-dialog-cancel").show();
            $("#clipboard-dialog-copy").show();
        }
    }

    function hideDropTarget() {
        $("#dropTarget").hide();
        RED.keyboard.remove("escape");
    }

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

            RED.actions.add("core:show-export-dialog",exportNodes);
            RED.actions.add("core:show-import-dialog",importNodes);


            RED.events.on("editor:open",function() { disabled = true; });
            RED.events.on("editor:close",function() { disabled = false; });
            RED.events.on("search:open",function() { disabled = true; });
            RED.events.on("search:close",function() { disabled = false; });
            RED.events.on("type-search:open",function() { disabled = true; });
            RED.events.on("type-search:close",function() { disabled = false; });
            RED.events.on("palette-editor:open",function() { disabled = true; });
            RED.events.on("palette-editor:close",function() { disabled = false; });


            $('#chart').on("dragenter",function(event) {
                if ($.inArray("text/plain",event.originalEvent.dataTransfer.types) != -1 ||
                     $.inArray("Files",event.originalEvent.dataTransfer.types) != -1) {
                    $("#dropTarget").css({display:'table'});
                    RED.keyboard.add("*", "escape" ,hideDropTarget);
                }
            });

            $('#dropTarget').on("dragover",function(event) {
                if ($.inArray("text/plain",event.originalEvent.dataTransfer.types) != -1 ||
                     $.inArray("Files",event.originalEvent.dataTransfer.types) != -1) {
                    event.preventDefault();
                }
            })
            .on("dragleave",function(event) {
                hideDropTarget();
            })
            .on("drop",function(event) {
                if ($.inArray("text/plain",event.originalEvent.dataTransfer.types) != -1) {
                    var data = event.originalEvent.dataTransfer.getData("text/plain");
                    data = data.substring(data.indexOf('['),data.lastIndexOf(']')+1);
                    RED.view.importNodes(data);
                } else if ($.inArray("Files",event.originalEvent.dataTransfer.types) != -1) {
                    var files = event.originalEvent.dataTransfer.files;
                    if (files.length === 1) {
                        var file = files[0];
                        var reader = new FileReader();
                        reader.onload = (function(theFile) {
                            return function(e) {
                                RED.view.importNodes(e.target.result);
                            };
                        })(file);
                        reader.readAsText(file);
                    }
                }
                hideDropTarget();
                event.preventDefault();
            });

        },
        import: importNodes,
        export: exportNodes
    }
})();