package com.fsck.k9.activity;

import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.Drawable;
import android.media.MediaScannerConnection;
import android.media.MediaScannerConnection.MediaScannerConnectionClient;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.provider.Contacts;
import android.provider.Contacts.Intents;
import android.util.Config;
import android.util.Log;
import android.util.TypedValue;
import android.view.*;
import android.view.View.OnClickListener;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.webkit.*;
import android.webkit.WebSettings.TextSize;
import android.widget.*;
import com.fsck.k9.*;
import com.fsck.k9.mail.*;
import com.fsck.k9.mail.Message.RecipientType;
import com.fsck.k9.mail.internet.MimeUtility;
import com.fsck.k9.mail.store.LocalStore.LocalAttachmentBodyPart;
import com.fsck.k9.mail.store.LocalStore.LocalMessage;
import com.fsck.k9.mail.store.LocalStore.LocalTextBody;
import com.fsck.k9.provider.AttachmentProvider;
import org.apache.commons.io.IOUtils;
import java.io.*;
import java.util.ArrayList;
import java.util.List;

public class MessageView extends K9Activity implements OnClickListener
{
    private static final String EXTRA_MESSAGE_REFERENCE = "com.fsck.k9.MessageView_messageReference";
    private static final String EXTRA_MESSAGE_REFERENCES = "com.fsck.k9.MessageView_messageReferences";
    private static final String EXTRA_NEXT = "com.fsck.k9.MessageView_next";

    private static final int ACTIVITY_CHOOSE_FOLDER_MOVE = 1;

    private static final int ACTIVITY_CHOOSE_FOLDER_COPY = 2;

    private TextView mFromView;
    private TextView mDateView;
    private TextView mTimeView;
    private TextView mToView;
    private TextView mCcView;
    private TextView mSubjectView;
    private CheckBox mFlagged;
    private int defaultSubjectColor;
    private WebView mMessageContentView;
    private LinearLayout mAttachments;
    private View mAttachmentIcon;
    private View mDownloadingIcon;
    private View mShowPicturesSection;
    View next;
    View next_scrolling;
    View previous;
    View previous_scrolling;

    private Account mAccount;
    private MessageReference mMessageReference;
    private ArrayList<MessageReference> mMessageReferences;

    private Message mMessage;

    private static final int PREVIOUS = 1;
    private static final int NEXT = 2;

    private int mLastDirection = PREVIOUS;


    private MessageReference mNextMessage = null;
    private MessageReference mPreviousMessage = null;



    private Menu optionsMenu = null;

    private Listener mListener = new Listener();
    private MessageViewHandler mHandler = new MessageViewHandler();

    private FontSizes mFontSizes = K9.getFontSizes();


    @Override
    public boolean dispatchKeyEvent(KeyEvent event)
    {
        boolean ret = false;

        if (KeyEvent.ACTION_DOWN == event.getAction())
        {
            ret = onKeyDown(event.getKeyCode(), event);
        }
        if (ret == false)
        {
            ret = super.dispatchKeyEvent(event);
        }
        return ret;
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event)
    {
        switch (keyCode)
        {
            case KeyEvent.KEYCODE_DEL:
            {
                onDelete();
                return true;
            }
            case KeyEvent.KEYCODE_D:
            {
                onDelete();
                return true;
            }
            case KeyEvent.KEYCODE_F:
            {
                onForward();
                return true;
            }
            case KeyEvent.KEYCODE_A:
            {
                onReplyAll();
                return true;
            }
            case KeyEvent.KEYCODE_R:
            {
                onReply();
                return true;
            }
            case KeyEvent.KEYCODE_G:
            {
                onFlag();
                return true;
            }

            case KeyEvent.KEYCODE_M:
            {
                onMove();
                return true;
            }
            case KeyEvent.KEYCODE_Y:
            {
                onCopy();
                return true;
            }
            case KeyEvent.KEYCODE_J:
            case KeyEvent.KEYCODE_P:
            {
                onPrevious(K9.isAnimations());
                return true;
            }
            case KeyEvent.KEYCODE_N:
            case KeyEvent.KEYCODE_K:
            {
                onNext(K9.isAnimations());
                return true;
            }
            case KeyEvent.KEYCODE_Z:
            {
                if (event.isShiftPressed())
                {
                    mHandler.post(new Runnable()
                    {
                        public void run()
                        {
                            mMessageContentView.zoomIn();
                        }
                    });
                }
                else
                {
                    mHandler.post(new Runnable()
                    {
                        public void run()
                        {
                            mMessageContentView.zoomOut();
                        }
                    });
                }
                return true;
            }
            case KeyEvent.KEYCODE_H:
            {
                Toast toast = Toast.makeText(this, R.string.message_help_key, Toast.LENGTH_LONG);
                toast.show();
                return true;
            }
        }
        return super.onKeyDown(keyCode, event);
    }

    class MessageViewHandler extends Handler
    {
        public void progress(final boolean progress)
        {
            runOnUiThread(new Runnable()
            {
                public void run()
                {
                    setProgressBarIndeterminateVisibility(progress);

                }
            });
        }

        public void addAttachment(final View attachmentView)
        {
            runOnUiThread(new Runnable()
            {
                public void run()
                {
                    mAttachments.addView(attachmentView);
                    mAttachments.setVisibility(View.VISIBLE);

                }
            });
        }

        public void setAttachmentsEnabled(final boolean enabled)
        {
            runOnUiThread(new Runnable()
            {
                public void run()
                {
                    for (int i = 0, count = mAttachments.getChildCount(); i < count; i++)
                    {
                        Attachment attachment = (Attachment) mAttachments.getChildAt(i).getTag();
                        attachment.viewButton.setEnabled(enabled);
                        attachment.downloadButton.setEnabled(enabled);
                    }

                }
            });
        }

        public void setHeaders(
            final   String subject,
            final   String from,
            final   String date,
            final   String time,
            final   String to,
            final   String cc,
            final   boolean hasAttachments,
            final   boolean isDownloading,
            final   boolean flagged,
            final   boolean answered)
        {
            runOnUiThread(new Runnable()
            {
                public void run()
                {
                    setTitle(subject);
                    mSubjectView.setText(subject);
                    mFromView.setText(from);
                    if (date != null)
                    {
                        mDateView.setText(date);
                        mDateView.setVisibility(View.VISIBLE);
                    }
                    else
                    {
                        mDateView.setVisibility(View.GONE);
                    }
                    mTimeView.setText(time);
                    mToView.setText(to);
                    mCcView.setText(cc);
                    mAttachmentIcon.setVisibility(hasAttachments ? View.VISIBLE : View.GONE);
                    mDownloadingIcon.setVisibility(isDownloading ? View.VISIBLE : View.GONE);
                    if (flagged)
                    {
                        mFlagged.setChecked(true);
                    }
                    else
                    {
                        mFlagged.setChecked(false);
                    }
                    mSubjectView.setTextColor(0xff000000 | defaultSubjectColor);


                    if (answered)
                    {
                        Drawable answeredIcon = getResources().getDrawable(
                                                    R.drawable.ic_mms_answered_small);
                        mSubjectView.setCompoundDrawablesWithIntrinsicBounds(
                            answeredIcon, // left
                            null, // top
                            null, // right
                            null); // bottom
                    }
                    else
                    {
                        mSubjectView.setCompoundDrawablesWithIntrinsicBounds(
                            null, // left
                            null, // top
                            null, // right
                            null); // bottom
                    }


                }
            });
        }

        public void networkError()
        {
            runOnUiThread(new Runnable()
            {
                public void run()
                {
                    Toast.makeText(MessageView.this,
                                   R.string.status_network_error, Toast.LENGTH_LONG).show();

                }
            });
        }

        public void invalidIdError()
        {
            runOnUiThread(new Runnable()
            {
                public void run()
                {
                    Toast.makeText(MessageView.this,
                                   R.string.status_invalid_id_error, Toast.LENGTH_LONG).show();

                }
            });
        }

        public void attachmentSaved(final String filename)
        {
            runOnUiThread(new Runnable()
            {
                public void run()
                {
                    Toast.makeText(MessageView.this, String.format(
                                       getString(R.string.message_view_status_attachment_saved), filename),
                                   Toast.LENGTH_LONG).show();


                }
            });
        }

        public void attachmentNotSaved()
        {
            runOnUiThread(new Runnable()
            {
                public void run()
                {

                    Toast.makeText(MessageView.this,
                                   getString(R.string.message_view_status_attachment_not_saved),
                                   Toast.LENGTH_LONG).show();

                }
            });
        }

        public void fetchingAttachment()
        {
            runOnUiThread(new Runnable()
            {
                public void run()
                {
                    Toast.makeText(MessageView.this,
                                   getString(R.string.message_view_fetching_attachment_toast),
                                   Toast.LENGTH_SHORT).show();
                }
            });
        }

        public void showShowPictures(final boolean show)
        {
            runOnUiThread(new Runnable()
            {
                public void run()
                {
                    mShowPicturesSection.setVisibility(show ? View.VISIBLE : View.GONE);
                }
            });

        }


    }

    class Attachment
    {
        public String name;
        public String contentType;
        public long size;
        public LocalAttachmentBodyPart part;
        public Button viewButton;
        public Button downloadButton;
        public ImageView iconView;
    }

    public static void actionView(Context context, MessageReference messRef, List<MessageReference> messReferences)
    {
        actionView(context, messRef, messReferences, null);
    }

    public static void actionView(Context context, MessageReference messRef, List<MessageReference> messReferences, Bundle extras)
    {
        Intent i = new Intent(context, MessageView.class);
        i.putExtra(EXTRA_MESSAGE_REFERENCE, messRef);
        i.putExtra(EXTRA_MESSAGE_REFERENCES, (Serializable)messReferences);
        if (extras != null)
        {
            i.putExtras(extras);
        }
        context.startActivity(i);
    }

    @Override
    public void onCreate(Bundle icicle)
    {
        super.onCreate(icicle);


        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.message_view);


        mFromView = (TextView)findViewById(R.id.from);
        mToView = (TextView)findViewById(R.id.to);
        mCcView = (TextView)findViewById(R.id.cc);
        mSubjectView = (TextView)findViewById(R.id.subject);
        defaultSubjectColor = mSubjectView.getCurrentTextColor();

        mDateView = (TextView)findViewById(R.id.date);
        mTimeView = (TextView)findViewById(R.id.time);
        mTopView = (ScrollView)findViewById(R.id.top_view);
        mMessageContentView = (WebView)findViewById(R.id.message_content);

        mAttachments = (LinearLayout)findViewById(R.id.attachments);
        mAttachmentIcon = findViewById(R.id.attachment);
        mDownloadingIcon = findViewById(R.id.downloading);
        mShowPicturesSection = findViewById(R.id.show_pictures_section);


        mFlagged = (CheckBox)findViewById(R.id.flagged);
        mFlagged.setOnClickListener(new OnClickListener()
        {
            public void onClick(View v)
            {
                onFlag();
            }
        });

        mMessageContentView.setVerticalScrollBarEnabled(true);
        mMessageContentView.setVerticalScrollbarOverlay(true);
        mMessageContentView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);

        final WebSettings webSettings = mMessageContentView.getSettings();

        webSettings.setSupportZoom(true);
        webSettings.setLoadsImagesAutomatically(true);
        //webSettings.setBuiltInZoomControls(true);
        webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);

        webSettings.setTextSize(mFontSizes.getMessageViewContent());

        mFromView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, mFontSizes.getMessageViewSender());
        mToView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, mFontSizes.getMessageViewTo());
        ((TextView)findViewById(R.id.to_label)).setTextSize(TypedValue.COMPLEX_UNIT_DIP, mFontSizes.getMessageViewTo());
        mCcView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, mFontSizes.getMessageViewCC());
        ((TextView)findViewById(R.id.cc_label)).setTextSize(TypedValue.COMPLEX_UNIT_DIP, mFontSizes.getMessageViewCC());
        mSubjectView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, mFontSizes.getMessageViewSubject());
        mTimeView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, mFontSizes.getMessageViewTime());
        mDateView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, mFontSizes.getMessageViewDate());

        mAttachments.setVisibility(View.GONE);
        mAttachmentIcon.setVisibility(View.GONE);

        setOnClickListener(R.id.from);
        setOnClickListener(R.id.reply);
        setOnClickListener(R.id.reply_all);
        setOnClickListener(R.id.delete);
        setOnClickListener(R.id.forward);
        setOnClickListener(R.id.next);
        setOnClickListener(R.id.previous);

        setOnClickListener(R.id.reply_scrolling);
//       setOnClickListener(R.id.reply_all_scrolling);
        setOnClickListener(R.id.delete_scrolling);
        setOnClickListener(R.id.forward_scrolling);
        setOnClickListener(R.id.next_scrolling);
        setOnClickListener(R.id.previous_scrolling);

        setOnClickListener(R.id.show_pictures);


        setTitle("");

        Intent intent = getIntent();
        Uri uri = intent.getData();

        if (icicle!=null)
        {
            mMessageReference = (MessageReference)icicle.getSerializable(EXTRA_MESSAGE_REFERENCE);
            mMessageReferences = (ArrayList<MessageReference>)icicle.getSerializable(EXTRA_MESSAGE_REFERENCES);
        }
        else
        {
            if (uri==null)
            {
                mMessageReference = (MessageReference)intent.getSerializableExtra(EXTRA_MESSAGE_REFERENCE);
                mMessageReferences = (ArrayList<MessageReference>)intent.getSerializableExtra(EXTRA_MESSAGE_REFERENCES);
            }
            else
            {
                List<String> segmentList = uri.getPathSegments();
                if (segmentList.size()==3)
                {
                    String accountId = segmentList.get(0);
                    Account[] accounts = Preferences.getPreferences(this).getAccounts();
                    boolean found = false;
                    for (Account account : accounts)
                    {
                        if (String.valueOf(account.getAccountNumber()).equals(accountId))
                        {
                            mAccount = account;
                            found = true;
                            break;
                        }
                    }
                    if (!found)
                    {
                        //TODO: Use ressource to externalize message
                        Toast.makeText(this, "Invalid account id: " + accountId, Toast.LENGTH_LONG).show();
                        return;
                    }
                    
                    mMessageReference = new MessageReference();
                    mMessageReference.accountUuid = mAccount.getUuid();
                    mMessageReference.folderName = segmentList.get(1);
                    mMessageReference.uid = segmentList.get(2);
                    
                    mMessageReferences = new ArrayList<MessageReference>();
                }
                else
                {
                    //TODO: Use ressource to externalize message
                    Toast.makeText(this, "Invalid intent uri: " + uri.toString(), Toast.LENGTH_LONG).show();
                    return;
                }
            }
        }
        if (K9.DEBUG)
            Log.d(K9.LOG_TAG, "MessageView got message " + mMessageReference);

        next = findViewById(R.id.next);
        previous = findViewById(R.id.previous);

        setOnClickListener(R.id.next);
        setOnClickListener(R.id.previous);

        next_scrolling = findViewById(R.id.next_scrolling);
        previous_scrolling = findViewById(R.id.previous_scrolling);


        boolean goNext = intent.getBooleanExtra(EXTRA_NEXT, false);
        if (goNext)
        {
            next.requestFocus();
        }
        // Perhaps the hideButtons should be global, instead of account-specific
        mAccount = Preferences.getPreferences(this).getAccount(mMessageReference.accountUuid);
        Account.HideButtons hideButtons = mAccount.getHideMessageViewButtons();

        //MessagingController.getInstance(getApplication()).addListener(mListener);
        if (Account.HideButtons.ALWAYS == hideButtons)
        {
            hideButtons();
        }
        else if (Account.HideButtons.NEVER == hideButtons)
        {
            showButtons();
        }
        else   // Account.HideButtons.KEYBOARD_AVAIL
        {
            final Configuration config = this.getResources().getConfiguration();
            if (config.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO)
            {
                hideButtons();
            }
            else
            {
                showButtons();
            }
        }
        displayMessage(mMessageReference);
    }

    @Override
    protected void onSaveInstanceState(Bundle outState)
    {
        outState.putSerializable(EXTRA_MESSAGE_REFERENCE, mMessageReference);
        outState.putSerializable(EXTRA_MESSAGE_REFERENCES, mMessageReferences);
    }

    private void displayMessage(MessageReference ref)
    {
        mMessageReference = ref;
        if (K9.DEBUG)
            Log.d(K9.LOG_TAG, "MessageView displaying message " + mMessageReference);
        
        mAccount = Preferences.getPreferences(this).getAccount(ref.accountUuid);
        
        mMessageContentView.getSettings().setBlockNetworkImage(true);
        K9.setBlockNetworkLoads(mMessageContentView.getSettings(), true);

        mAttachments.removeAllViews();
        findSurroundingMessagesUid();


        boolean enableNext = (mNextMessage != null);
        boolean enablePrev = (mPreviousMessage != null);

        if (next.isEnabled() != enableNext)
            next.setEnabled(enableNext);
        if (previous.isEnabled() != enablePrev)
            previous.setEnabled(enablePrev);

        if (next_scrolling != null && (next_scrolling.isEnabled() != enableNext))
            next_scrolling.setEnabled(enableNext);
        if (previous_scrolling != null && (previous_scrolling.isEnabled() != enablePrev))
            previous_scrolling.setEnabled(enablePrev);

        MessagingController.getInstance(getApplication()).loadMessageForView(
            mAccount,
            mMessageReference.folderName,
            mMessageReference.uid,
            mListener);

        mTopView.scrollTo(0, 0);
        mMessageContentView.scrollTo(0, 0);
    }


    private void showButtons()
    {
        View buttons = findViewById(R.id.scrolling_buttons);
        if (buttons != null)
        {
            buttons.setVisibility(View.GONE);
        }
    }

    private void hideButtons()
    {
        View buttons = findViewById(R.id.bottom_buttons);
        if (buttons != null)
        {
            buttons.setVisibility(View.GONE);
        }
    }

    private void setOnClickListener(int viewCode)
    {
        View thisView = findViewById(viewCode);
        if (thisView != null)
        {
            thisView.setOnClickListener(this);
        }
    }

    private void findSurroundingMessagesUid()
    {
        mNextMessage = mPreviousMessage = null;
        int i = mMessageReferences.indexOf(mMessageReference);
        if (i < 0)
            return;
        if (i != 0)
            mNextMessage = mMessageReferences.get(i - 1);
        if (i != (mMessageReferences.size() - 1))
            mPreviousMessage = mMessageReferences.get(i + 1);
    }

    @Override
    public void onResume()
    {
        super.onResume();
    }

    private void onDelete()
    {
        if (mMessage != null)
        {
            Message messageToDelete = mMessage;

            findSurroundingMessagesUid();

            // Remove this message's Uid locally
            mMessageReferences.remove(messageToDelete.getUid());

            MessagingController.getInstance(getApplication()).deleteMessages(
                new Message[] { messageToDelete },
                null);

            if (mLastDirection == NEXT && mNextMessage != null)
            {
                onNext(K9.isAnimations());
            }
            else if (mLastDirection == PREVIOUS && mPreviousMessage != null)
            {
                onPrevious(K9.isAnimations());
            }
            else if (mNextMessage != null)
            {
                onNext(K9.isAnimations());
            }
            else if (mPreviousMessage != null)
            {
                onPrevious(K9.isAnimations());
            }



            else
            {
                finish();
            }
        }
    }

    private void onClickSender()
    {
        if (mMessage != null)
        {
            try
            {
                Address senderEmail = mMessage.getFrom()[0];
                Uri contactUri = Uri.fromParts("mailto", senderEmail.getAddress(), null);

                Intent contactIntent = new Intent(Contacts.Intents.SHOW_OR_CREATE_CONTACT);
                contactIntent.setData(contactUri);

                // Pass along full E-mail string for possible create dialog
                contactIntent.putExtra(Contacts.Intents.EXTRA_CREATE_DESCRIPTION,
                                       senderEmail.toString());

                // Only provide personal name hint if we have one
                String senderPersonal = senderEmail.getPersonal();
                if (senderPersonal != null)
                {
                    contactIntent.putExtra(Intents.Insert.NAME, senderPersonal);
                }

                startActivity(contactIntent);
            }
            catch (MessagingException me)
            {
                if (Config.LOGV)
                {
                    Log.v(K9.LOG_TAG, "loadMessageForViewHeadersAvailable", me);
                }
            }
        }
    }

    private void onReply()
    {
        if (mMessage != null)
        {
            MessageCompose.actionReply(this, mAccount, mMessage, false);
            finish();
        }
    }

    private void onReplyAll()
    {
        if (mMessage != null)
        {
            MessageCompose.actionReply(this, mAccount, mMessage, true);
            finish();
        }
    }

    private void onForward()
    {
        if (mMessage != null)
        {
            MessageCompose.actionForward(this, mAccount, mMessage);
            finish();
        }
    }

    private void onFlag()
    {
        if (mMessage != null)
        {
            MessagingController.getInstance(getApplication()).setFlag(mAccount,
                    mMessage.getFolder().getName(), new String[] { mMessage.getUid() }, Flag.FLAGGED, !mMessage.isSet(Flag.FLAGGED));
            try
            {
                mMessage.setFlag(Flag.FLAGGED, !mMessage.isSet(Flag.FLAGGED));
                setHeaders(mAccount, mMessage.getFolder().getName(), mMessage.getUid(), mMessage);
                setMenuFlag();
            }
            catch (MessagingException me)
            {
                Log.e(K9.LOG_TAG, "Could not set flag on local message", me);
            }
        }
    }

    private void onMove()
    {
        if (MessagingController.getInstance(getApplication()).isMoveCapable(mAccount) == false)
        {
            return;
        }
        if (MessagingController.getInstance(getApplication()).isMoveCapable(mMessage) == false)
        {
            Toast toast = Toast.makeText(this, R.string.move_copy_cannot_copy_unsynced_message, Toast.LENGTH_LONG);
            toast.show();
            return;
        }
        Intent intent = new Intent(this, ChooseFolder.class);
        intent.putExtra(ChooseFolder.EXTRA_ACCOUNT, mAccount.getUuid());
        intent.putExtra(ChooseFolder.EXTRA_CUR_FOLDER, mMessageReference.folderName);
        intent.putExtra(ChooseFolder.EXTRA_MESSAGE_UID, mMessageReference);
        startActivityForResult(intent, ACTIVITY_CHOOSE_FOLDER_MOVE);
    }

    private void onCopy()
    {
        if (MessagingController.getInstance(getApplication()).isCopyCapable(mAccount) == false)
        {
            return;
        }
        if (MessagingController.getInstance(getApplication()).isCopyCapable(mMessage) == false)
        {
            Toast toast = Toast.makeText(this, R.string.move_copy_cannot_copy_unsynced_message, Toast.LENGTH_LONG);
            toast.show();
            return;
        }
        Intent intent = new Intent(this, ChooseFolder.class);
        intent.putExtra(ChooseFolder.EXTRA_ACCOUNT, mAccount.getUuid());
        intent.putExtra(ChooseFolder.EXTRA_CUR_FOLDER, mMessageReference.folderName);
        intent.putExtra(ChooseFolder.EXTRA_MESSAGE_UID, mMessageReference);
        startActivityForResult(intent, ACTIVITY_CHOOSE_FOLDER_COPY);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        if (resultCode != RESULT_OK)
            return;

        switch (requestCode)
        {
            case ACTIVITY_CHOOSE_FOLDER_MOVE:
            case ACTIVITY_CHOOSE_FOLDER_COPY:
                if (data == null)
                    return;
                String destFolderName = data.getStringExtra(ChooseFolder.EXTRA_NEW_FOLDER);
                String srcFolderName = data.getStringExtra(ChooseFolder.EXTRA_CUR_FOLDER);
                String uid = data.getStringExtra(ChooseFolder.EXTRA_MESSAGE_UID);

                if (uid.equals(mMessageReference) && srcFolderName.equals(mMessageReference.folderName))
                {

                    switch (requestCode)
                    {
                        case ACTIVITY_CHOOSE_FOLDER_MOVE:
                            MessagingController.getInstance(getApplication()).moveMessage(mAccount,
                                    srcFolderName, mMessage, destFolderName, null);
                            break;
                        case ACTIVITY_CHOOSE_FOLDER_COPY:
                            MessagingController.getInstance(getApplication()).copyMessage(mAccount,
                                    srcFolderName, mMessage, destFolderName, null);
                            break;
                    }
                }
        }
    }


    private void onSendAlternate()
    {
        if (mMessage != null)
        {
            MessagingController.getInstance(getApplication()).sendAlternate(this, mAccount, mMessage);

        }
    }

    @Override
    protected void onNext(boolean animate)
    {
        if (mNextMessage == null)
        {
            Toast.makeText(this, getString(R.string.end_of_folder), Toast.LENGTH_SHORT).show();
            return;
        }
        mLastDirection = NEXT;
        if (animate)
        {
            mTopView.startAnimation(outToLeftAnimation());
        }
        displayMessage(mNextMessage);
        next.requestFocus();
    }

    @Override
    protected void onPrevious(boolean animate)
    {
        if (mPreviousMessage == null)
        {
            Toast.makeText(this, getString(R.string.end_of_folder), Toast.LENGTH_SHORT).show();
            return;
        }

        mLastDirection = PREVIOUS;
        if (animate)
        {
            mTopView.startAnimation(inFromRightAnimation());
        }
        displayMessage(mPreviousMessage);
        previous.requestFocus();
    }

    private void onMarkAsUnread()
    {
        if (mMessage != null)
        {
            MessagingController.getInstance(getApplication()).setFlag(
                mAccount,
                mMessageReference.folderName,
                new String[] { mMessage.getUid() },
                Flag.SEEN,
                false);
        }
    }

    /**
     * Creates a unique file in the given directory by appending a hyphen
     * and a number to the given filename.
     * @param directory
     * @param filename
     * @return
     */
    private File createUniqueFile(File directory, String filename)
    {
        File file = new File(directory, filename);
        if (!file.exists())
        {
            return file;
        }
        // Get the extension of the file, if any.
        int index = filename.lastIndexOf('.');
        String format;
        if (index != -1)
        {
            String name = filename.substring(0, index);
            String extension = filename.substring(index);
            format = name + "-%d" + extension;
        }
        else
        {
            format = filename + "-%d";
        }
        for (int i = 2; i < Integer.MAX_VALUE; i++)
        {
            file = new File(directory, String.format(format, i));
            if (!file.exists())
            {
                return file;
            }
        }
        return null;
    }

    private void onDownloadAttachment(Attachment attachment)
    {
        if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
        {
            /*
             * Abort early if there's no place to save the attachment. We don't want to spend
             * the time downloading it and then abort.
             */
            Toast.makeText(this,
                           getString(R.string.message_view_status_attachment_not_saved),
                           Toast.LENGTH_SHORT).show();
            return;
        }
        if (mMessage != null)
        {
            MessagingController.getInstance(getApplication()).loadAttachment(
                mAccount,
                mMessage,
                attachment.part,
                new Object[] { true, attachment },
                mListener);
        }
    }

    private void onViewAttachment(Attachment attachment)
    {
        if (mMessage != null)
        {
            MessagingController.getInstance(getApplication()).loadAttachment(
                mAccount,
                mMessage,
                attachment.part,
                new Object[] { false, attachment },
                mListener);
        }
    }

    private void onShowPictures()
    {
        K9.setBlockNetworkLoads(mMessageContentView.getSettings(), false);
        mMessageContentView.getSettings().setBlockNetworkImage(false);
        mShowPicturesSection.setVisibility(View.GONE);
    }

  
    public void onClick(View view)
    {
        switch (view.getId())
        {
            case R.id.from:
                onClickSender();
                break;
            case R.id.reply:
            case R.id.reply_scrolling:
                onReply();
                break;
            case R.id.reply_all:
                onReplyAll();
                break;
            case R.id.delete:
            case R.id.delete_scrolling:
                onDelete();
                break;
            case R.id.forward:
            case R.id.forward_scrolling:
                onForward();
                break;
            case R.id.next:
            case R.id.next_scrolling:
                onNext(K9.isAnimations());
                break;
            case R.id.previous:
            case R.id.previous_scrolling:
                onPrevious(K9.isAnimations());
                break;
            case R.id.download:
                onDownloadAttachment((Attachment) view.getTag());
                break;
            case R.id.view:
                onViewAttachment((Attachment) view.getTag());
                break;
            case R.id.show_pictures:
                onShowPictures();
                break;
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        switch (item.getItemId())
        {
            case R.id.delete:
                onDelete();
                break;
            case R.id.reply:
                onReply();
                break;
            case R.id.reply_all:
                onReplyAll();
                break;
            case R.id.forward:
                onForward();
                break;
            case R.id.send_alternate:
                onSendAlternate();
                break;
            case R.id.mark_as_unread:
                onMarkAsUnread();
                break;
            case R.id.flag:
                onFlag();
                break;
            case R.id.move:
                onMove();
                break;
            case R.id.copy:
                onCopy();
                break;
            default:
                return super.onOptionsItemSelected(item);
        }
        return true;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        super.onCreateOptionsMenu(menu);
        getMenuInflater().inflate(R.menu.message_view_option, menu);
        optionsMenu = menu;
        setMenuFlag();
        if (MessagingController.getInstance(getApplication()).isCopyCapable(mAccount) == false)
        {
            menu.findItem(R.id.copy).setVisible(false);
        }
        if (MessagingController.getInstance(getApplication()).isMoveCapable(mAccount) == false)
        {
            menu.findItem(R.id.move).setVisible(false);
        }
        return true;
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu)
    {
        setMenuFlag();
        return super.onPrepareOptionsMenu(menu);
    }

    private void setMenuFlag()
    {
        Menu menu = optionsMenu;
        if (menu != null)
        {
            MenuItem flagItem = menu.findItem(R.id.flag);
            if (flagItem != null && mMessage != null)
            {
                flagItem.setTitle((mMessage.isSet(Flag.FLAGGED) ? R.string.unflag_action : R.string.flag_action));
            }
        }
    }

    private Bitmap getPreviewIcon(Attachment attachment) throws MessagingException
    {
        try
        {
            return BitmapFactory.decodeStream(
                       getContentResolver().openInputStream(
                           AttachmentProvider.getAttachmentThumbnailUri(mAccount,
                                   attachment.part.getAttachmentId(),
                                   62,
                                   62)));
        }
        catch (Exception e)
        {
            /*
             * We don't care what happened, we just return null for the preview icon.
             */
            return null;
        }
    }

    /*
     * Formats the given size as a String in bytes, kB, MB or GB with a single digit
     * of precision. Ex: 12,315,000 = 12.3 MB
     */
    public static String formatSize(float size)
    {
        long kb = 1024;
        long mb = (kb * 1024);
        long gb  = (mb * 1024);
        if (size < kb)
        {
            return String.format("%d bytes", (int) size);
        }
        else if (size < mb)
        {
            return String.format("%.1f kB", size / kb);
        }
        else if (size < gb)
        {
            return String.format("%.1f MB", size / mb);
        }
        else
        {
            return String.format("%.1f GB", size / gb);
        }
    }

    private void renderAttachments(Part part, int depth) throws MessagingException
    {
        String contentType = MimeUtility.unfoldAndDecode(part.getContentType());
        String contentDisposition = MimeUtility.unfoldAndDecode(part.getDisposition());
        String name = MimeUtility.getHeaderParameter(contentType, "name");
        if (name == null)
        {
            name = MimeUtility.getHeaderParameter(contentDisposition, "filename");
        }
        if (name != null)
        {
            /*
             * We're guaranteed size because LocalStore.fetch puts it there.
             */
            int size = Integer.parseInt(MimeUtility.getHeaderParameter(contentDisposition, "size"));

            Attachment attachment = new Attachment();
            attachment.size = size;
            String mimeType = part.getMimeType();
            if (MimeUtility.DEFAULT_ATTACHMENT_MIME_TYPE.equals(mimeType))
            {
                mimeType = MimeUtility.getMimeTypeByExtension(name);
            }
            attachment.contentType = mimeType;
            attachment.name = name;
            attachment.part = (LocalAttachmentBodyPart) part;

            LayoutInflater inflater = getLayoutInflater();
            View view = inflater.inflate(R.layout.message_view_attachment, null);

            TextView attachmentName = (TextView)view.findViewById(R.id.attachment_name);
            TextView attachmentInfo = (TextView)view.findViewById(R.id.attachment_info);
            ImageView attachmentIcon = (ImageView)view.findViewById(R.id.attachment_icon);
            Button attachmentView = (Button)view.findViewById(R.id.view);
            Button attachmentDownload = (Button)view.findViewById(R.id.download);

            if ((!MimeUtility.mimeTypeMatches(attachment.contentType,
                                              K9.ACCEPTABLE_ATTACHMENT_VIEW_TYPES))
                    || (MimeUtility.mimeTypeMatches(attachment.contentType,
                                                    K9.UNACCEPTABLE_ATTACHMENT_VIEW_TYPES)))
            {
                attachmentView.setVisibility(View.GONE);
            }
            if ((!MimeUtility.mimeTypeMatches(attachment.contentType,
                                              K9.ACCEPTABLE_ATTACHMENT_DOWNLOAD_TYPES))
                    || (MimeUtility.mimeTypeMatches(attachment.contentType,
                                                    K9.UNACCEPTABLE_ATTACHMENT_DOWNLOAD_TYPES)))
            {
                attachmentDownload.setVisibility(View.GONE);
            }

            if (attachment.size > K9.MAX_ATTACHMENT_DOWNLOAD_SIZE)
            {
                attachmentView.setVisibility(View.GONE);
                attachmentDownload.setVisibility(View.GONE);
            }

            attachment.viewButton = attachmentView;
            attachment.downloadButton = attachmentDownload;
            attachment.iconView = attachmentIcon;

            view.setTag(attachment);
            attachmentView.setOnClickListener(this);
            attachmentView.setTag(attachment);
            attachmentDownload.setOnClickListener(this);
            attachmentDownload.setTag(attachment);

            attachmentName.setText(name);
            attachmentInfo.setText(formatSize(size));

            Bitmap previewIcon = getPreviewIcon(attachment);
            if (previewIcon != null)
            {
                attachmentIcon.setImageBitmap(previewIcon);
            }
            else
            {
                attachmentIcon.setImageResource(R.drawable.attached_image_placeholder);
            }

            mHandler.addAttachment(view);
        }

        if (part.getBody() instanceof Multipart)
        {
            Multipart mp = (Multipart)part.getBody();
            for (int i = 0; i < mp.getCount(); i++)
            {
                renderAttachments(mp.getBodyPart(i), depth + 1);
            }
        }
    }

    private void setHeaders(Account account, String folder, String uid,
                            final Message message) throws MessagingException
    {
        String subjectText = message.getSubject();
        String fromText = Address.toFriendly(message.getFrom());
        String dateText = Utility.isDateToday(message.getSentDate()) ?
                          null :
                          getDateFormat().format(message.getSentDate());
        String timeText = getTimeFormat().format(message.getSentDate());
        String toText = Address.toFriendly(message.getRecipients(RecipientType.TO));
        String ccText = Address.toFriendly(message.getRecipients(RecipientType.CC));
        boolean hasAttachments = ((LocalMessage) message).getAttachmentCount() > 0;
        boolean isDownloading = !message.isSet(Flag.X_DOWNLOADED_FULL);
        mHandler.setHeaders(subjectText,
                            fromText,
                            dateText,
                            timeText,
                            toText,
                            ccText,
                            hasAttachments,
                            isDownloading,
                            message.isSet(Flag.FLAGGED),
                            message.isSet(Flag.ANSWERED));
    }

    class Listener extends MessagingListener
    {

        @Override
        public void loadMessageForViewHeadersAvailable(Account account, String folder, String uid,
                final Message message)
        {
            if (!mMessageReference.uid.equals(uid) || !mMessageReference.folderName.equals(folder) 
                    || !mMessageReference.accountUuid.equals(account.getUuid()))
            {
                return;
            }

            MessageView.this.mMessage = message;
            if (!message.isSet(Flag.X_DOWNLOADED_FULL)
                && !message.isSet(Flag.X_DOWNLOADED_PARTIAL))
            {
                mHandler.post(new Runnable()
                {
                    public void run()
                    {
                        mMessageContentView.loadUrl("file:///android_asset/downloading.html");
                    }
                });
            }
            try
            {
                setHeaders(account, folder, uid, message);
            }
            catch (MessagingException me)
            {
                if (Config.LOGV)
                {
                    Log.v(K9.LOG_TAG, "loadMessageForViewHeadersAvailable", me);
                }
            }
        }

        @Override
        public void loadMessageForViewBodyAvailable(Account account, String folder, String uid,
                Message message)
        {
            if (!mMessageReference.uid.equals(uid) || !mMessageReference.folderName.equals(folder) 
                    || !mMessageReference.accountUuid.equals(account.getUuid()))
            {
                return;
            }

            try
            {
                if (MessageView.this.mMessage!=null
                    && MessageView.this.mMessage.isSet(Flag.X_DOWNLOADED_PARTIAL)
                    && message.isSet(Flag.X_DOWNLOADED_FULL))
                {

                    setHeaders(account, folder, uid, message);
                }

                MessageView.this.mMessage = message;

                String text;
                Part part = MimeUtility.findFirstPartByMimeType(mMessage, "text/html");
                if (part == null)
                {
                    part = MimeUtility.findFirstPartByMimeType(mMessage, "text/plain");
                    if (part == null)
                    {
                        text = null;
                    }
                    else
                    {
                        LocalTextBody body = (LocalTextBody)part.getBody();
                        if (body == null)
                        {
                            text = null;
                        }
                        else
                        {
                            text = body.getBodyForDisplay();
                        }
                    }
                }
                else
                {
                    text = MimeUtility.getTextFromPart(part);
                }

                if (text != null)
                {
                    /*
                     * TODO this should be smarter, change to regex for img, but consider how to
                     * get background images and a million other things that HTML allows.
                     */
                    final String emailText = text;
                    mHandler.post(new Runnable()
                    {
                        public void run()
                        {
                            mMessageContentView.loadDataWithBaseURL("email://", emailText, "text/html", "utf-8", null);
                        }
                    });
                    mHandler.showShowPictures(text.contains("<img"));
                }
                else
                {
                    mHandler.post(new Runnable()
                    {
                        public void run()
                        {
                            mMessageContentView.loadUrl("file:///android_asset/empty.html");
                        }
                    });
                }

                renderAttachments(mMessage, 0);
            }
            catch (Exception e)
            {
                if (Config.LOGV)
                {
                    Log.v(K9.LOG_TAG, "loadMessageForViewBodyAvailable", e);
                }
            }
        }//loadMessageForViewBodyAvailable


        @Override
        public void loadMessageForViewFailed(Account account, String folder, String uid,
                                             final Throwable t)
        {
            if (!mMessageReference.uid.equals(uid) || !mMessageReference.folderName.equals(folder) 
                    || !mMessageReference.accountUuid.equals(account.getUuid()))
            {
                return;
            }

            mHandler.post(new Runnable()
            {
                public void run()
                {
                    setProgressBarIndeterminateVisibility(false);
                    if (t instanceof IllegalArgumentException)
                    {
                        mHandler.invalidIdError();
                    }
                    else
                    {
                        mHandler.networkError();
                    }
                    if (!MessageView.this.mMessage.isSet(Flag.X_DOWNLOADED_PARTIAL))
                    {
                        mMessageContentView.loadUrl("file:///android_asset/empty.html");
                    }
                }
            });
        }

        @Override
        public void loadMessageForViewFinished(Account account, String folder, String uid,
                                               Message message)
        {
            if (!mMessageReference.uid.equals(uid) || !mMessageReference.folderName.equals(folder) 
                    || !mMessageReference.accountUuid.equals(account.getUuid()))
            {
                return;
            }

            mHandler.post(new Runnable()
            {
                public void run()
                {
                    setProgressBarIndeterminateVisibility(false);
                }
            });
        }

        @Override
        public void loadMessageForViewStarted(Account account, String folder, String uid)
        {
            if (!mMessageReference.uid.equals(uid) || !mMessageReference.folderName.equals(folder) 
                    || !mMessageReference.accountUuid.equals(account.getUuid()))
            {
                return;
            }

            mHandler.post(new Runnable()
            {
                public void run()
                {
                    mMessageContentView.loadUrl("file:///android_asset/loading.html");
                    setProgressBarIndeterminateVisibility(true);
                }
            });
        }

        @Override
        public void loadAttachmentStarted(Account account, Message message,
                                          Part part, Object tag, boolean requiresDownload)
        {
            if (mMessage!=message)
            {
                return;
            }

            mHandler.setAttachmentsEnabled(false);
            mHandler.progress(true);
            if (requiresDownload)
            {
                mHandler.fetchingAttachment();
            }
        }

        @Override
        public void loadAttachmentFinished(Account account, Message message,
                                           Part part, Object tag)
        {
            if (mMessage!=message)
            {
                return;
            }

            mHandler.setAttachmentsEnabled(true);
            mHandler.progress(false);

            Object[] params = (Object[]) tag;
            boolean download = (Boolean) params[0];
            Attachment attachment = (Attachment) params[1];

            if (download)
            {
                try
                {
                    File file = createUniqueFile(Environment.getExternalStorageDirectory(),
                                                 attachment.name);
                    Uri uri = AttachmentProvider.getAttachmentUri(
                                  mAccount,
                                  attachment.part.getAttachmentId());
                    InputStream in = getContentResolver().openInputStream(uri);
                    OutputStream out = new FileOutputStream(file);
                    IOUtils.copy(in, out);
                    out.flush();
                    out.close();
                    in.close();
                    mHandler.attachmentSaved(file.getName());
                    new MediaScannerNotifier(MessageView.this, file);
                }
                catch (IOException ioe)
                {
                    mHandler.attachmentNotSaved();
                }
            }
            else
            {
                Uri uri = AttachmentProvider.getAttachmentUri(
                              mAccount,
                              attachment.part.getAttachmentId());
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setData(uri);
                intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                try
                {
                    startActivity(intent);
                }
                catch (Exception e)
                {
                    Log.e(K9.LOG_TAG, "Could not display attachment of type " + attachment.contentType, e);
                    Toast toast = Toast.makeText(MessageView.this, getString(R.string.message_view_no_viewer, attachment.contentType), Toast.LENGTH_LONG);
                    toast.show();
                }
            }
        }

        @Override
        public void loadAttachmentFailed(Account account, Message message, Part part,
                                         Object tag, String reason)
        {
            if (mMessage!=message)
            {
                return;
            }

            mHandler.setAttachmentsEnabled(true);
            mHandler.progress(false);
            mHandler.networkError();
        }
    }

    class MediaScannerNotifier implements MediaScannerConnectionClient
    {
        private MediaScannerConnection mConnection;
        private File mFile;

        public MediaScannerNotifier(Context context, File file)
        {
            mFile = file;
            mConnection = new MediaScannerConnection(context, this);
            mConnection.connect();
        }

        public void onMediaScannerConnected()
        {
            mConnection.scanFile(mFile.getAbsolutePath(), null);
        }

        public void onScanCompleted(String path, Uri uri)
        {
            try
            {
                if (uri != null)
                {
                    Intent intent = new Intent(Intent.ACTION_VIEW);
                    intent.setData(uri);
                    startActivity(intent);
                }
            }
            finally
            {
                mConnection.disconnect();
            }
        }
    }


    private Animation inFromRightAnimation()
    {
        return slideAnimation(0.0f, +1.0f);
    }

    private Animation outToLeftAnimation()
    {
        return slideAnimation(0.0f, -1.0f);
    }

    private Animation slideAnimation(float right, float left)
    {

        Animation slide = new TranslateAnimation(
            Animation.RELATIVE_TO_PARENT,  right, Animation.RELATIVE_TO_PARENT,  left,
            Animation.RELATIVE_TO_PARENT,  0.0f, Animation.RELATIVE_TO_PARENT,   0.0f
        );
        slide.setDuration(125);
        slide.setFillBefore(true);
        slide.setInterpolator(new AccelerateInterpolator());
        return slide;
    }
}