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package com.sun.glass.ui.mac;

import java.net.URI;
import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import java.nio.file.FileSystems;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.sun.glass.ui.Application;
import com.sun.glass.ui.Clipboard;
import com.sun.glass.ui.Pixels;
import com.sun.glass.ui.SystemClipboard;

class MacSystemClipboard extends SystemClipboard {

    static final String FILE_SCHEME = "file";
    static final private String BAD_URI_MSG = "bad URI in com.sun.glass.ui.mac.MacSystemClipboard for file: ";
    static final private String BAD_URL_MSG = "bad URL in com.sun.glass.ui.mac.MacSystemClipboard for file: ";

    // if true we'll synthesize a file list
    static final boolean SUPPORT_10_5_API = true;

    // if true we'll force the synthesized file list into 1st item as Plain text,
    // regardless of whether such attribute already exists or not
    static final boolean SUPPORT_10_5_API_FORCE = false;

    // http://javafx-jira.kenai.com/browse/RT-12187
    // Mac OS X 10.6 supports more than one nonhomogenous item, however, JFX currently does not
    static final boolean SUPPORT_10_6_API = false;

    long seed = 0;

    final MacPasteboard pasteboard;
    public MacSystemClipboard(String name) {
        super(name);
        switch (name) {
            case Clipboard.DND:
                this.pasteboard = new MacPasteboard(MacPasteboard.DragAndDrop);
                break;
            case Clipboard.SYSTEM:
                this.pasteboard = new MacPasteboard(MacPasteboard.General);
                break;
            default:
                this.pasteboard = new MacPasteboard(name);
                break;
        }
    }

    @Override
    protected boolean isOwner() {
        return (this.seed == this.pasteboard.getSeed());
    }

    @Override
    protected int supportedSourceActionsFromSystem() {
        return this.pasteboard.getAllowedOperation();
    }

    @Override
    protected void pushTargetActionToSystem(int actionDone) {
        // TODO
    }

    @Override
    protected void pushToSystem(HashMap<String, Object> data, int supportedActions) {
        HashMap<String,Object> itemFirst = null; // used to handle paste as one item if we can
        HashMap<String,Object> itemList[] = null; // special case: multiple items for handling urls 10.6 style

        for (String mime  : data.keySet()) {
            Object object = data.get(mime);
            if (object != null) {
                switch (mime) {
                    case URI_TYPE:
                    {
                        List<HashMap<String, Object>> items = putToItemList(((String) object).split("\n"), true);
                        if (!items.isEmpty()) {
                            itemList = new HashMap[items.size()];
                            items.toArray(itemList);
                        }
                        break;
                    }
                    case RAW_IMAGE_TYPE:
                    case DRAG_IMAGE:
                    {
                        Pixels pixels = null;
                        if (object instanceof Pixels) {
                            pixels = (Pixels) object;
                        } else if (object instanceof ByteBuffer) {
                            try {
                                ByteBuffer bb = (ByteBuffer) object;
                                bb.rewind();
                                pixels = Application.GetApplication().createPixels(bb.getInt(), bb.getInt(), bb.slice());
                            } catch (Exception ex) {
                                //Ignore all ill-sized arrays. Not a client problem.
                            }
                        } else if (object instanceof IntBuffer) {
                            try {
                                IntBuffer ib = (IntBuffer) object;
                                ib.rewind();
                                pixels = Application.GetApplication().createPixels(ib.get(), ib.get(), ib.slice());
                            } catch (Exception ex) {
                                //Ignore all ill-sized arrays. Not a client problem.
                            }
                        } else {
                            throw new RuntimeException(object.getClass().getName() + " cannot be converted to Pixels");
                        }
                        if (pixels != null) {
                            if (itemFirst == null) {
                                itemFirst = new HashMap<>();
                            }
                            itemFirst.put(FormatEncoder.mimeToUtf(mime), pixels);
                        }
                        break;
                    }
                    case TEXT_TYPE:
                    case HTML_TYPE:
                    case RTF_TYPE:
                    {
                        if (object instanceof String) {
                            String string = (String)object;
                            if (itemFirst == null) {
                                itemFirst = new HashMap<>();
                            }
                            itemFirst.put(FormatEncoder.mimeToUtf(mime), string);
                        } else {
                            // http://javafx-jira.kenai.com/browse/RT-14593
                            // temporary code, DelayedCallback trips over this
                            // by reusing (incorrectly) text mime type
                            System.err.println("DelayedCallback not implemented yet: RT-14593");
                            Thread.dumpStack();
                        }
                        break;
                    }
                    case FILE_LIST_TYPE:
                    {
                        // handle FILE_LIST_TYPE last to know whether to handle it as urls (10.6) or file list (10.5)
                        // depending on whether urls have been already explicitly set or not
                        String files[] = (String[]) object;
                        if (data.get(URI_TYPE) == null) {
                            // special case no explicit urls found - synthesize urls (Mac OS 10.6 style)
                            List<HashMap<String, Object>> items = putToItemList(files, true);
                            if (!items.isEmpty()) {
                                itemList = new HashMap[items.size()];
                                items.toArray(itemList);
                            }
                        } else if (MacSystemClipboard.SUPPORT_10_5_API) {
                            // special case urls already exist - synthesize file list (Mac OS 10.5 API compatible)
                            if (itemFirst == null) {
                                itemFirst = new HashMap<>();
                            }
                            StringBuilder string = null;
                            for (int i = 0; i < files.length; i++) {
                                String file = files[i];
                                String path = FileSystems.getDefault().getPath(file).toUri().toASCIIString();
                                if (string == null) {
                                    string = new StringBuilder();
                                }
                                string.append(path);
                                if (i < (files.length - 1)) {
                                    string.append("\n");
                                }
                            }
                            if (string != null) {
                                if ((itemFirst.get(MacPasteboard.UtfString) == null) || MacSystemClipboard.SUPPORT_10_5_API_FORCE) {
                                    itemFirst.remove(MacPasteboard.UtfString);
                                    itemFirst.put(MacPasteboard.UtfString, string.toString());
                                }
                            }
                        }
                        break;
                    }
                    default:
                    {
                        // http://javafx-jira.kenai.com/browse/RT-14592
                        // custom client mime type - pass through
                        if (itemFirst == null) {
                            itemFirst = new HashMap<>();
                        }
                        itemFirst.put(FormatEncoder.mimeToUtf(mime), serialize(object));
                        break;
                    }
                }
            }
        }

        if (itemFirst != null) {
            if (itemList == null || itemList.length == 0) {
                itemList = new HashMap[1];
                itemList[0] = itemFirst;
            } else {
                itemList[0].putAll(itemFirst);
            }
        }

        if (itemList != null) {
            this.seed = this.pasteboard.putItems(itemList, supportedActions);
        }
    }

    @Override
    protected Object popFromSystem(String mime) {
        String[][] utfs = this.pasteboard.getUTFs();

        if (utfs == null) {
            return null;
        }
        switch (mime) {
            case RAW_IMAGE_TYPE:
            {
                List<Pixels> list = new ArrayList<>();
                for (int i = 0; i < utfs.length; i++) {
                    Object data = this.pasteboard.getItemAsRawImage(i);
                    if (data != null) {
                        Pixels pixels = getPixelsForRawImage((byte[]) data);
                        list.add(pixels);
                        if (SUPPORT_10_6_API == false) {
                            break;
                        }
                    }
                }
                return getObjectFromList(list);
            }
            case TEXT_TYPE:
            case HTML_TYPE:
            case RTF_TYPE:
            case URI_TYPE:
            {
                List<String> list = new ArrayList<>();
                for (int i = 0; i < utfs.length; i++) {
                    String item = this.pasteboard.getItemStringForUTF(i, FormatEncoder.mimeToUtf(mime));
                    if (item != null) {
                        list.add(item);
                        if (SUPPORT_10_6_API == false) {
                            break;
                        }
                    }
                }
                return getObjectFromList(list);
            }
            case FILE_LIST_TYPE:
            {
                // synthesize the list from individual URLs
                List<String> list = new ArrayList<>();
                for (int i = 0; i < utfs.length; i++) {
                    String file = this.pasteboard.getItemStringForUTF(i, MacPasteboard.UtfFileUrl); // explicitly ask for urls
                    if (file != null) {
                        list.add(_convertFileReferencePath(file));
                    }
                }
                String[] object = null;
                if (list.size() > 0) {
                    object = new String[list.size()];
                    list.toArray(object);
                }
                return object;
            }
            default:
            {
                List<ByteBuffer> list = new ArrayList<>();
                for (int i = 0; i < utfs.length; i++) {
                    byte data[] = this.pasteboard.getItemBytesForUTF(i, FormatEncoder.mimeToUtf(mime));
                    if (data != null) {
                        // http://javafx-jira.kenai.com/browse/RT-14592
                        // custom data - currently we wrap it up in ByteBuffer
                        ByteBuffer bb = ByteBuffer.wrap(data);
                        list.add(bb);
                        if (SUPPORT_10_6_API == false) {
                            break;
                        }
                    }
                }
                return getObjectFromList(list);
            }
        }
    }

    private Object getObjectFromList(List<?> list) {
        if (list.size() > 0) {
            if (SUPPORT_10_6_API == false) {
                return list.get(0);
            } else {
                return list;
            }
        }
        return null;
    }

    @Override
    protected String[] mimesFromSystem() {
        String[][] all = this.pasteboard.getUTFs();
        List<String> mimes = new ArrayList<>();

        if (all != null) {
            for (String[] utfs : all) {
                if (utfs != null) {
                    for (String utf : utfs) {
                        String mime = FormatEncoder.utfToMime(utf);
                        if ((mime != null) && (!mimes.contains(mime))) {
                            mimes.add(mime);
                        }
                    }
                }
            }
        }
        String[] strings = new String[mimes.size()];
        mimes.toArray(strings);
        return strings;
    }

    @Override public String toString() {
        return "Mac OS X "+this.pasteboard.getName()+" Clipboard";
    }

    private static class FormatEncoder {
        private static final String DYNAMIC_UTI_PREFIX = "dyn.";

        private static final Map<String, String> utm = new HashMap<>();
        private static final Map<String, String> mtu = new HashMap<>();

        static {
            utm.put(MacPasteboard.UtfString, TEXT_TYPE);
            utm.put(MacPasteboard.UtfHtml, HTML_TYPE);
            utm.put(MacPasteboard.UtfRtf, RTF_TYPE);
            utm.put(MacPasteboard.UtfUrl, URI_TYPE);
            utm.put(MacPasteboard.UtfFileUrl, FILE_LIST_TYPE);
            utm.put(MacPasteboard.UtfTiff, RAW_IMAGE_TYPE);
            utm.put(MacPasteboard.UtfPng, RAW_IMAGE_TYPE);
            utm.put(MacPasteboard.UtfRawImageType, RAW_IMAGE_TYPE);
            utm.put(MacPasteboard.UtfDragImageType, DRAG_IMAGE);
            utm.put(MacPasteboard.UtfDragImageOffset, DRAG_IMAGE_OFFSET);

            mtu.put(TEXT_TYPE, MacPasteboard.UtfString);
            mtu.put(HTML_TYPE, MacPasteboard.UtfHtml);
            mtu.put(RTF_TYPE, MacPasteboard.UtfRtf);
            mtu.put(URI_TYPE, MacPasteboard.UtfUrl);
            mtu.put(FILE_LIST_TYPE, MacPasteboard.UtfFileUrl);
            mtu.put(RAW_IMAGE_TYPE, MacPasteboard.UtfRawImageType);
            mtu.put(DRAG_IMAGE, MacPasteboard.UtfDragImageType);
            mtu.put(DRAG_IMAGE_OFFSET, MacPasteboard.UtfDragImageOffset);
        }

        public static synchronized String mimeToUtf(String mime) {
            if (mtu.containsKey(mime)) {
                return mtu.get(mime);
            }
            String encodedUTI = _convertMIMEtoUTI(mime);
            mtu.put(mime, encodedUTI);
            utm.put(encodedUTI, mime);
            return encodedUTI;
        }

        public static synchronized String utfToMime(String uti) {
            if (utm.containsKey(uti)) {
                return utm.get(uti);
            }
            if (uti.startsWith(DYNAMIC_UTI_PREFIX)) {
                String decodedMIME = _convertUTItoMIME(uti);
                mtu.put(decodedMIME, uti);
                utm.put(uti, decodedMIME);
                return decodedMIME;
            }
            // FX would not handle an unknown mime.
            return null;
        }

        private static native String _convertMIMEtoUTI(String mime);
        private static native String _convertUTItoMIME(String uti);
    }

    private URI createUri(String path, String message) {
        URI uri = null;
        try {
            uri = new URI(path);
        } catch (URISyntaxException ex) {
            System.err.println(message+path);
            Thread.dumpStack();
        }
        return uri;
    }

    private HashMap<String, Object> getItemFromURIString(String string) {
        String utf;
        String path = null;
        if (string.indexOf(':') == -1) {
            // Treat a URI without a scheme as a file name
            utf = MacPasteboard.UtfFileUrl;
            path = FileSystems.getDefault().getPath(string).toUri().toASCIIString();
        } else {
            // Mac OS X file names cannot contain ":", so this means we are dealing with a URI
            // Only fully-qualified URIs are supported, so semicolon must exist as a scheme separator
            utf = MacPasteboard.UtfUrl;
            URI uri = createUri(string, MacSystemClipboard.BAD_URI_MSG);
            if (uri != null) {
                path = uri.toASCIIString();
            } // no else, the error is already reported by createURI
        }
        if (path != null) {
            HashMap<String, Object> item = new HashMap<>();
            item.put(utf, path);
            return item;
        } else {
            return null;
        }
    }

    private List<HashMap<String, Object>> putToItemList(String[] items, boolean excludeComments) {
        // synthesize list of urls as seperate pasteboard items (Mac OS 10.6 style)
        List<HashMap<String, Object>> uriList = new ArrayList<>();
        for (String file : items) {
            if (!(excludeComments && file.startsWith("#"))) {
                // exclude comments: http://www.ietf.org/rfc/rfc2483.txt
                HashMap<String, Object> entry = getItemFromURIString(file);
                if (entry != null) {
                    uriList.add(entry);
                }
            }
        }
        return  uriList;
    }

    private static native String _convertFileReferencePath(String path);

    private byte[] serialize(Object object) {
        if (object instanceof String) {
            String string = (String)object;
            return string.getBytes();
        } else if (object instanceof ByteBuffer) {
            ByteBuffer buffer = (ByteBuffer)object;
            return buffer.array();
        } else {
            throw new RuntimeException("can not handle "+object);
        }
    }
}