package com.freerdp.freerdpcore.utils;

import android.annotation.TargetApi;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;

public abstract class ClipboardManagerProxy {

    public static ClipboardManagerProxy getClipboardManager(Context ctx) {
        if (VERSION.SDK_INT < VERSION_CODES.HONEYCOMB)
            return new PreHCClipboardManager(ctx);
        else
            return new HCClipboardManager(ctx);
    }

    public abstract void setClipboardData(String data);

    public abstract void addClipboardChangedListener(OnClipboardChangedListener listener);

    public abstract void removeClipboardboardChangedListener(OnClipboardChangedListener listener);

    public static interface OnClipboardChangedListener {
        void onClipboardChanged(String data);
    }

    private static class PreHCClipboardManager extends ClipboardManagerProxy {

        public PreHCClipboardManager(Context ctx) {

        }

        @Override
        public void setClipboardData(String data) {
        }

        @Override
        public void addClipboardChangedListener(
                OnClipboardChangedListener listener) {
        }

        @Override
        public void removeClipboardboardChangedListener(
                OnClipboardChangedListener listener) {
        }
    }

    @TargetApi(11)
    private static class HCClipboardManager extends ClipboardManagerProxy implements ClipboardManager.OnPrimaryClipChangedListener {
        private ClipboardManager mClipboardManager;
        private OnClipboardChangedListener mListener;

        public HCClipboardManager(Context ctx) {
            mClipboardManager = (ClipboardManager) ctx.getSystemService(Context.CLIPBOARD_SERVICE);
        }

        @Override
        public void setClipboardData(String data) {
            mClipboardManager.setPrimaryClip(ClipData.newPlainText("rdp-clipboard", data == null ? "" : data));
        }

        @Override
        public void onPrimaryClipChanged() {
            ClipData clip = mClipboardManager.getPrimaryClip();
            String data = null;

            if (clip != null && clip.getItemCount() > 0) {
                CharSequence cs = clip.getItemAt(0).getText();
                if (cs != null)
                    data = cs.toString();
            }
            if (mListener != null) {
                mListener.onClipboardChanged(data);
            }
        }

        @Override
        public void addClipboardChangedListener(
                OnClipboardChangedListener listener) {
            mListener = listener;
            mClipboardManager.addPrimaryClipChangedListener(this);
        }

        @Override
        public void removeClipboardboardChangedListener(
                OnClipboardChangedListener listener) {
            mListener = null;
            mClipboardManager.removePrimaryClipChangedListener(this);
        }
    }
}