"use strict";

function WebswingClipboard(injector) {
    var module = this;
    var api;
    module.injects = {
        cfg: 'webswing.config',
        send: 'socket.send',
        focusDefault: 'focusManager.focusDefault',
    };
    module.provides = {
        'clipboard.cut': cut,
        'clipboard.copy': copy,
        'clipboard.paste': paste,
        'clipboard.displayCopyBar': writeToClipboard,
        'clipboard.displayPasteDialog': () => {},
        'clipboard.dispose': close,
        'clipboard.register': () => {},
        'clipboard.updateLocalData': () => {}
    };
    module.ready = function () {
        api = injector.modules.clipboard.injected;
    };

    function cut(event) {
        copy(event, true);
    }

    function copy(event, cut) {
        if (api.cfg.ieVersion && api.cfg.ieVersion <= 11) {
            window.clipboardData.setData('Text', '');
        } else {
            event.clipboardData.setData('text/plain', '');
        }
        api.send({
            clipboardEvent: {
                type: cut === true ? 2 : 0
            }
        });
    }

    function paste(event, special) {
        if (api.cfg.hasControl) {
            var text = '';
            var html = '';
            if (api.cfg.ieVersion && api.cfg.ieVersion <= 11) {
                text = window.clipboardData.getData('Text');
                html = text;
            } else {
                var data = event.clipboardData || event.originalEvent.clipboardData;
                text = data.getData('text/plain');
                html = data.getData('text/html');
                if (data.items != null) {
                    for (var i = 0; i < data.items.length; i++) {
                        if (data.items[i].type.indexOf('image') === 0) {
                            var img = data.items[i];
                            var reader = new FileReader();
                            reader.onload = function (event) {
                                sendPasteEvent(special, text, html, event.target.result);
                            };
                            var imgAsFile = img.getAsFile();
                            if (imgAsFile) {
                                reader.readAsDataURL(img.getAsFile());
                            }
                            return;
                        }
                    }
                }
            }
            sendPasteEvent(special, text, html);
        }
    }

    function sendPasteEvent(special, text, html, img) {
        api.send({
            clipboardEvent: {
                type: 1,
                special: !!special,
                text: text != null && text.length !== 0 ? text : undefined,
                html: html != null && html.length !== 0 ? html : undefined,
                img: img != null ? img : undefined
            }
        });
    }

    function writeToClipboard(data) {
        var item;
        if (data.text != null && data.text.length !== 0) {
            navigator.clipboard.writeText(data.text).then(function() {
                console.log("Copied to clipboard successfully!");
            }, function(e) {
                console.error("Unable to write to clipboard. :-(" + e );
            });
        } else if(data.html != null && data.html.length !== 0) {
            item = [new ClipboardItem({ "text/html": new Blob([data.html], { type: "text/html" }) })];
        } else if(data.img != null) {
            item = [new ClipboardItem({ "image/png": new Blob([data.img], { type: "image/png" }) })];
        }
        if(item != null) {
            navigator.clipboard.write(item).then(function() {
                console.log("Copied to clipboard successfully!");
            }, function(e) {
                console.error("Unable to write to clipboard. :-(" + e );
            });
        }
    }

    function close() {
        api.focusDefault();
    }

}