/*
 * 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.
 */

package net.micode.notes.ui;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Rect;
import android.text.Editable;
import android.text.Layout;
import android.text.Selection;
import android.text.Spannable;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.text.style.ForegroundColorSpan;
import android.text.style.URLSpan;
import android.util.AttributeSet;
import android.util.Log;
import android.view.ContextMenu;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.MotionEvent;
import android.widget.EditText;

import net.micode.notes.R;

import java.util.HashMap;
import java.util.Map;

public class NoteEditText extends EditText {
    private static final String TAG = "NoteEditText";
    private int mIndex;
    private int mSelectionStartBeforeDelete;

    public static final int MENU_ITEM_COLOR = Menu.FIRST + 1; // 使用 Menu.FIRST 避免冲突

    private static final String SCHEME_TEL = "tel:" ;
    private static final String SCHEME_HTTP = "http:" ;
    private static final String SCHEME_EMAIL = "mailto:" ;

    private NoteEditActivity noteEditActivity;

    private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
    static {
        sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel);
        sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web);
        sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email);
    }

    /**
     * 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;
        if (context instanceof NoteEditActivity) {
            noteEditActivity = (NoteEditActivity) context;
        }
        /*原来它张这个样子
         */
        //徐家畅的修改
        /*super(context, null, android.R.attr.editTextStyle);
        init();*/
    }/*
    //新增的函数
    private void init() {
        addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {}

            @Override
            public void afterTextChanged(Editable s) {
                checkSelectionAndShowMenu();
            }
        });

        setOnTouchListener((v, event) -> {
            if (event.getAction() == MotionEvent.ACTION_UP) {
                post(this::checkSelectionAndShowMenu);
            }
            return false; // 让 EditText 处理其他触摸事件
        });
    }
    //徐家畅添加
//徐家畅继续添加
    private void checkSelectionAndShowMenu() {
        int selStart = getSelectionStart();
        int selEnd = getSelectionEnd();

        if (selStart != selEnd && Math.abs(selEnd - selStart) > 0) {
            showCustomColorPickerDialog(); // 自定义颜色选择器
        }
    }

    private void showCustomColorPickerDialog() {
        final int[] colors = {
                android.graphics.Color.RED,
                android.graphics.Color.BLUE,
                android.graphics.Color.GREEN,
                android.graphics.Color.YELLOW,
                android.graphics.Color.BLACK
        };

        final CharSequence[] colorNames = {"Red", "Blue", "Green", "Yellow", "Black"};

        AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
        builder.setTitle("Select A Color");
        builder.setItems(colorNames, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                int selectedColor = colors[which];
                int start = getSelectionStart();
                int end = getSelectionEnd();

                Spannable spannable = (Spannable) getText();
                // 移除旧的颜色样式
                android.text.style.ForegroundColorSpan[] oldSpans = spannable.getSpans(start, end, android.text.style.ForegroundColorSpan.class);
                for (ForegroundColorSpan span : oldSpans) {
                    spannable.removeSpan(span);
                }

                // 设置新颜色
                spannable.setSpan(new android.text.style.ForegroundColorSpan(selectedColor), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            }
        });

        builder.show();
    }
    //徐家畅添加*/
    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:

                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 (mOnTextViewChangeListener != null) {
                    return false;
                }
                break;
            case KeyEvent.KEYCODE_DEL:
                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 (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 (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) {
        if (mOnTextViewChangeListener != null) {
            if (!focused && TextUtils.isEmpty(getText())) {
                mOnTextViewChangeListener.onTextChange(mIndex, false);
            } else {
                mOnTextViewChangeListener.onTextChange(mIndex, true);
            }
        }
        super.onFocusChanged(focused, direction, previouslyFocusedRect);
    }

//重写事件菜单
@Override
public boolean onTextContextMenuItem(int id) {
    if (id == MENU_ITEM_COLOR) {
        showColorPickerDialog();
        return true;
    }
    return super.onTextContextMenuItem(id);
}
//徐家畅添加

    @Override
    protected void onCreateContextMenu(ContextMenu menu) {
        if (getText() instanceof Spanned) {
            Log.d(TAG, "Creating context menu");

            int selStart = getSelectionStart();
            int selEnd = getSelectionEnd();

            // 添加颜色选项
            if(selStart!=selEnd){
            menu.add(Menu.NONE, MENU_ITEM_COLOR, Menu.NONE, "Color")
                    .setOnMenuItemClickListener(item -> {
                        showColorPickerDialog();
                        return true;
                    });}
            //这是徐家畅加的

            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, 1, defaultResId).setOnMenuItemClickListener(
                        new OnMenuItemClickListener() {
                            public boolean onMenuItemClick(MenuItem item) {
                                // goto a new intent
                                urls[0].onClick(NoteEditText.this);
                                return true;
                            }
                        });
            }
        }
        super.onCreateContextMenu(menu);
    }
    private void showColorPickerDialog() {
        final int[] colors = {
                android.graphics.Color.RED,
                android.graphics.Color.BLUE,
                android.graphics.Color.GREEN,
                android.graphics.Color.YELLOW,
                android.graphics.Color.BLACK
        };

        final CharSequence[] colorNames = {"Red", "Blue", "Green", "Yellow", "Black"};

        AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
        builder.setTitle("Select A Color");
        builder.setItems(colorNames, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                int selectedColor = colors[which];
                int start = getSelectionStart();
                int end = getSelectionEnd();

                Spannable spannable = (Spannable) getText();
                // 移除旧的前景色样式
                android.text.style.ForegroundColorSpan[] oldSpans = spannable.getSpans(start, end, android.text.style.ForegroundColorSpan.class);
                for (ForegroundColorSpan span : oldSpans) {
                    spannable.removeSpan(span);
                }

                // 设置新颜色
                spannable.setSpan(new android.text.style.ForegroundColorSpan(selectedColor), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            }
        });

        builder.show();
    }
    //根据文字选中情况来判断是否隐藏新按钮
    @Override
    protected void onSelectionChanged(int selStart, int selEnd) {
        super.onSelectionChanged(selStart, selEnd);
        if(noteEditActivity!=null){
            if (selStart != selEnd) {
                // 有文字被选中，显示按钮
                noteEditActivity.showTextColorButton();
            } else {
                // 没有文字被选中，隐藏按钮
                noteEditActivity.hideTextColorButton();
            }
        }
    }
//这也是徐家畅加的
}