/*
 * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
 *
 * 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.
 */

/**
 * Call by the {@link NoteEditActivity} to delete or add edit text
 */
public interface OnTextViewChangeListener {
    /**
     * Delete current edit text when {@link KeyEvent#KEYCODE_DEL} happens
     * and the text is null
     */
    void onEditTextDelete(int index, String text);

    /**
     * Add edit text after current edit text when {@link KeyEvent#KEYCODE_ENTER}
     * happen
     */
    void onEditTextEnter(int index, String text);

    /**
     * Hide or show item option when text change
     */
    void onTextChange(int index, boolean hasText);
}

private OnTextViewChangeListener mOnTextViewChangeListener;

public NoteEditText(Context context) {
    super(context, null);
    mIndex = 0;
}

public void setIndex(int index) {
    mIndex = index;
}

public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
    mOnTextViewChangeListener = listener;
}

public NoteEditText(Context context, AttributeSet attrs) {
    super(context, attrs, android.R.attr.editTextStyle);
}

public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    // TODO Auto-generated constructor stub
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            // Calculate the position where the user tapped and set the text selection
            int x = (int) event.getX();
            int y = (int) event.getY();
            x -= getTotalPaddingLeft();
            y -= getTotalPaddingTop();
            x += getScrollX();
            y += getScrollY();

            Layout layout = getLayout();
            int line = layout.getLineForVertical(y);
            int off = layout.getOffsetForHorizontal(line, x);
            Selection.setSelection(getText(), off);
            break;
    }
    return super.onTouchEvent(event);
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    switch (keyCode) {
        case KeyEvent.KEYCODE_ENTER:
            // If the enter key is pressed, allow the default behavior unless a listener is set
            if (mOnTextViewChangeListener != null) {
                return false;
            }
            break;
        case KeyEvent.KEYCODE_DEL:
            // Record the selection start position before deletion
            mSelectionStartBeforeDelete = getSelectionStart();
            break;
        default:
            break;
    }
    return super.onKeyDown(keyCode, event);
}

@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
    switch(keyCode) {
        case KeyEvent.KEYCODE_DEL:
            // If the delete key is released and a listener is set, notify the listener
            if (mOnTextViewChangeListener != null) {
                if (0 == mSelectionStartBeforeDelete && mIndex != 0) {
                    mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());
                    return true;
                }
            } else {
                Log.d(TAG, "OnTextViewChangeListener was not seted");
            }
            break;
        case KeyEvent.KEYCODE_ENTER:
            // If the enter key is released and a listener is set, notify the listener
            if (mOnTextViewChangeListener != null) {
                int selectionStart = getSelectionStart();
                String text = getText().subSequence(selectionStart, length()).toString();
                setText(getText().subSequence(0, selectionStart));
                mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text);
            } else {
                Log.d(TAG, "OnTextViewChangeListener was not seted");
            }
            break;
        default:
            break;
    }
    return super.onKeyUp(keyCode, event);
}

@Override
protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
    // Notify the listener when the text changes or focus is lost
    if (mOnTextViewChangeListener != null) {
        if (!focused && TextUtils.isEmpty(getText())) {
            mOnTextViewChangeListener.onTextChange(mIndex, false);
        } else {
            mOnTextViewChangeListener.onTextChange(mIndex, true);
        }
    }
    super.onFocusChanged(focused, direction, previouslyFocusedRect);
}

@Override
protected void onCreateContextMenu(ContextMenu menu) {
    // Create a context menu for URL spans in the text
    if (getText() instanceof Spanned) {
        int selStart = getSelectionStart();
        int selEnd = getSelectionEnd();

        int min = Math.min(selStart, selEnd);
        int max = Math.max(selStart, selEnd);

        final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);
        if (urls.length == 1) {
            int defaultResId = 0;
            for(String schema: sSchemaActionResMap.keySet()) {
                if(urls[0].getURL().indexOf(schema) >= 0) {
                    defaultResId = sSchemaActionResMap.get(schema);
                    break;
                }
            }

            if (defaultResId == 0) {
                defaultResId = R.string.note_link_other;
            }

            menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
                    new OnMenuItemClickListener() {
                        public boolean onMenuItemClick(MenuItem item) {
                            // goto a new intent
                            urls[0].onClick(NoteEditText.this);
                            return true;
                        }
                    });
        }
    }
    super.onCreateContextMenu(menu);
}