/**
 * Copyright 2015 IBM Corp.
 *
 * 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() {
    // TODO: Fix issue where text outside an inner function cannot be NLS-enabled since RED._ is not available yet when that code is run
    var dialog = $('<div id="clipboard-dialog" class="hide"><form class="dialog-form form-horizontal"></form></div>')
        .appendTo("body")
        .dialog({
            modal: true,
            autoOpen: false,
            width: 500,
            resizable: false,
            buttons: [
                {
                    id: "clipboard-dialog-ok",
                    text: "Ok", //RED._("dialog.ok"),
                    click: function() {
                        if (/Import/.test(dialog.dialog("option","title"))) {
                            RED.view.importNodes($("#clipboard-import").val());
                        }
                        $( this ).dialog( "close" );
                    }
                },
                {
                    id: "clipboard-dialog-cancel",
                    text: "Cancel", //RED._("dialog.cancel"),
                    click: function() {
                        $( this ).dialog( "close" );
                    }
                },
                {
                    id: "clipboard-dialog-close",
                    text: "Close", //RED._("dialog.close"),
                    click: function() {
                        $( this ).dialog( "close" );
                    }
                }
            ],
            open: function(e) {
                $(this).parent().find(".ui-dialog-titlebar-close").hide();
                RED.keyboard.disable();
            },
            close: function(e) {
                RED.keyboard.enable();
            }
    });

    var dialogContainer = dialog.children(".dialog-form");
    
    var exportNodesDialog = '<div class="form-row">'+
        '<label for="node-input-export" style="display: block; width:100%;"><i class="fa fa-clipboard"></i>'+'Nodes:' /*RED._("dialog.nodes")*/+'</label>'+
        '<textarea readonly 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-export" rows="5"></textarea>'+
        '</div>'+
        '<div class="form-tips">'+
		'Select the text above and copy to the clipboard with Ctrl-C.'+
        //RED._("dialog.selectToCopy")+
        '</div>';
        
    var 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="'+'Paste nodes here' /*RED._("dialog.pasteNodesHere")*/+'"></textarea>'+
        '</div>';

    function validateImport() {
        var importInput = $("#clipboard-import");
        var v = importInput.val();
        try {
            JSON.parse(v);
            importInput.removeClass("input-error");
            $("#clipboard-dialog-ok").button("enable");
        } catch(err) {
            if (v !== "") {
                importInput.addClass("input-error");
            }
            $("#clipboard-dialog-ok").button("disable");
        }
    }
    
    function importNodes() {
        dialogContainer.empty();
        dialogContainer.append($(importNodesDialog));
        $("#clipboard-dialog-ok").show();
        $("#clipboard-dialog-cancel").show();
        $("#clipboard-dialog-close").hide();
        $("#clipboard-dialog-ok").button("disable");
        $("#clipboard-import").keyup(validateImport);
        $("#clipboard-import").on('paste',function() { setTimeout(validateImport,10)});
        
        dialog.dialog("option","title",RED._("dialog.importNodes")).dialog("open");
    }

    function exportNodes() {
        dialogContainer.empty();
        dialogContainer.append($(exportNodesDialog));
        $("#clipboard-dialog-ok").hide();
        $("#clipboard-dialog-cancel").hide();
        $("#clipboard-dialog-close").show();
        var selection = RED.view.selection();
        if (selection.nodes) {
            var nns = RED.nodes.createExportableNodeSet(selection.nodes);
            $("#clipboard-export")
                .val(JSON.stringify(nns))
                .focus(function() {
                    var textarea = $(this);
                    textarea.select();
                    textarea.mouseup(function() {
                        textarea.unbind("mouseup");
                        return false;
                    })
                });
            dialog.dialog("option","title",RED._("dialog.exportNodesClipboard")).dialog( "open" );
        }
    }
    
    function hideDropTarget() {
        $("#dropTarget").hide();
        RED.keyboard.remove(/* ESCAPE */ 27);
    }
    
    return {
        init: function() {
            RED.view.on("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.keyboard.add(/* e */ 69,{ctrl:true},function(){exportNodes();d3.event.preventDefault();});
            RED.keyboard.add(/* i */ 73,{ctrl:true},function(){importNodes();d3.event.preventDefault();});
            
            
            
            $('#chart').on("dragenter",function(event) {
                if ($.inArray("text/plain",event.originalEvent.dataTransfer.types) != -1) {
                    $("#dropTarget").css({display:'table'});
                    RED.keyboard.add(/* ESCAPE */ 27,hideDropTarget);
                }
            });
            
            $('#dropTarget').on("dragover",function(event) {
                if ($.inArray("text/plain",event.originalEvent.dataTransfer.types) != -1) {
                    event.preventDefault();
                }
            })
            .on("dragleave",function(event) {
                hideDropTarget();
            })
            .on("drop",function(event) {
                var data = event.originalEvent.dataTransfer.getData("text/plain");
                hideDropTarget();
                RED.view.importNodes(data);
                event.preventDefault();
            });
            
            
        },
        import: importNodes,
        export: exportNodes
    }
        
        
        
        
        
})();