package com.fr.solution.plugin.design.formula.ui.type;

import com.fanruan.api.design.ui.component.code.UISyntaxTextArea;
import com.fanruan.api.i18n.I18nKit;
import com.fr.base.BaseFormula;
import com.fanruan.api.macro.ProductConstants;
import com.fanruan.api.util.StringKit;
import com.fanruan.api.design.ui.container.UIScrollPane;

import com.fr.design.beans.FurtherBasicBeanPane;
import com.fr.solution.plugin.design.formula.ui.evt.OperateListener;

import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public abstract class BaseFormulaPane<T extends BaseFormula> extends FurtherBasicBeanPane<T> implements CommonEvent, KeyListener {

    private static final int KEY_10 = 10;
    //上下左右
    private static final int KEY_37 = 37;
    private static final int KEY_38 = 38;
    private static final int KEY_39 = 39;
    private static final int KEY_40 = 40;


    private UISyntaxTextArea formulaTextArea;
    private int currentPosition = 0;
    private int beginPosition = 0;
    private int insertPosition = 0;
    private int ifHasBeenWritten = 0;

    private OperateListener operateListener;

    public BaseFormulaPane() {
        setLayout(new BorderLayout());
        initFormulaTextArea();
        UIScrollPane formulaTextAreaScrollPane = new UIScrollPane(formulaTextArea);
        formulaTextAreaScrollPane.setBorder(null);
        add(formulaTextAreaScrollPane, BorderLayout.CENTER);
    }

    private void initFormulaTextArea() {
        formulaTextArea = createContentEditor();
        initFormulaTextAreaKeyListener();
        initFormulaTextAreaMouseListener();
    }



    private void initFormulaTextAreaKeyListener() {
        formulaTextArea.addKeyListener(this);
        formulaTextArea.addKeyListener(new KeyAdapter() {
            public void keyReleased(KeyEvent e) {
                formulaTextArea.setForeground(Color.black);
                String text = formulaTextArea.getText();
                // 判断在中文输入状态是否还包含提示符 要删掉
                String tip = "\n\n\n" + I18nKit.getLocText("Plugin-Design_Basic_FormulaPane_Tips");
                if (text.contains(tip)) {
                    text = text.substring(0, text.indexOf(tip));
                    insertPosition = 0;
                    formulaTextArea.setText(text);
                }
            }
        });
    }

    private void initFormulaTextAreaMouseListener() {
        formulaTextArea.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                insertPosition = formulaTextArea.getCaretPosition();
                if (ifHasBeenWritten == 0) {
                    formulaTextArea.setText("");
                    ifHasBeenWritten = 1;
                    formulaTextArea.setForeground(Color.black);
                    insertPosition = 0;
                }
            }

            @Override
            public void mouseReleased(MouseEvent e) {
                currentPosition = formulaTextArea.getCaretPosition();
                if (currentPosition == insertPosition) {
                    beginPosition = getBeginPosition();
                    insertPosition = beginPosition;
                    firstStepToFindTips(beginPosition);
                    operateListener.fixFunctionNameList();
                }
            }
        });
    }

    protected int getBeginPosition() {
        int i = currentPosition;
        String textArea = formulaTextArea.getText();
        for (; i > 0; i--) {
            String tested = textArea.substring(i - 1, i).toUpperCase();
            char[] testedChar = tested.toCharArray();
            if (isChar(testedChar[0]) || isNum(testedChar[0])) {
                continue;
            } else {
                break;
            }
        }
        return i;
    }

    private static boolean isNum(char tested) {
        return tested >= '0' && tested <= '9';
    }

    private boolean isChar(char tested) {
        return tested >= 'A' && tested <= 'Z';
    }

    protected void firstStepToFindTips(int theBeginPosition) {
        String textArea = formulaTextArea.getText();
        if (currentPosition > 0 && theBeginPosition < currentPosition) {
            String next = textArea.substring(theBeginPosition, theBeginPosition + 1);
            char[] nextChar = next.toCharArray();
            if (!isNum(nextChar[0])) {
                String toFind = textArea.substring(theBeginPosition, currentPosition);
                operateListener.search(toFind, false);
                formulaTextArea.requestFocusInWindow();
            } else {
                operateListener.clearMathListModel();
            }
        } else {
            String toFind = textArea.substring(theBeginPosition, currentPosition);
            operateListener.search(toFind, false);
            formulaTextArea.requestFocusInWindow();
        }
    }

    @Override
    public void reset() {

    }

    protected abstract UISyntaxTextArea createContentEditor();

    protected void fixContent(String content) {
        if (content.trim().equals("=")) {
            this.formulaTextArea.setForeground(Color.gray);
            this.formulaTextArea.setText("\n\n\n" + I18nKit.getLocText("Plugin-Design_Basic_FormulaPane_Tips"));
            this.formulaTextArea.setCaretPosition(0);
            ifHasBeenWritten = 0;
            operateListener.clearMathListModel();
        } else if (content.trim().charAt(0) == '=') {
            this.formulaTextArea.setText(content.trim().substring(1));
            currentPosition = formulaTextArea.getCaretPosition();
            beginPosition = getBeginPosition();
            insertPosition = beginPosition;
            firstStepToFindTips(beginPosition);
            operateListener.fixFunctionNameList();
            ifHasBeenWritten = 1;
        } else {
            this.formulaTextArea.setText(content);
            currentPosition = formulaTextArea.getCaretPosition();
            beginPosition = getBeginPosition();
            insertPosition = beginPosition;
            firstStepToFindTips(beginPosition);
            operateListener.fixFunctionNameList();
            ifHasBeenWritten = 1;
        }
    }


    protected String getText() {
        return formulaTextArea.getText();
    }

    @Override
    public T updateBean() {
        String content = getText();
        if (ifHasBeenWritten == 0) {
            return createWrittenFormula(content);
        } else {
            return createFormula(content);
        }
    }

    protected abstract T createWrittenFormula(String content);

    protected abstract T createFormula(String content);

    @Override
    public void keyTyped(KeyEvent e) {

    }


    @Override
    public void keyPressed(KeyEvent e) {
        if (ifHasBeenWritten == 0) {
            this.formulaTextArea.setText(StringKit.EMPTY);
        }
    }


    @Override
    public void keyReleased(KeyEvent e) {
        int key = e.getKeyCode();
        // 如果是删除符号  ，为了可读性 没有和其他按键的程序相融合
        if (key == KEY_38 || key == KEY_40 || key == KEY_37 || key == KEY_39 || key == KEY_10) {
            operateListener.clearMathListModel();
            currentPosition = formulaTextArea.getCaretPosition();
            insertPosition = currentPosition;
            beginPosition = getBeginPosition();
        } else {
            if (this.formulaTextArea.getText().trim().length() == 0) {
                insertPosition = 0;
                operateListener.clearMathListModel();
            } else {
                this.formulaTextArea.setForeground(Color.black);
                currentPosition = formulaTextArea.getCaretPosition();
                beginPosition = getBeginPosition();
                insertPosition = beginPosition;
                firstStepToFindTips(beginPosition);
                operateListener.fixFunctionNameList();
                ifHasBeenWritten = 1;
            }
        }
    }

    /**
     * Apply text.
     */
    public void applyText(String text) {
        if (text == null || text.length() <= 0) {
            return;
        }
        if (ifHasBeenWritten == 0) {
            formulaTextArea.setForeground(Color.black);
            formulaTextArea.setText("");
            ifHasBeenWritten = 1;
            insertPosition = 0;
        }
        text = wrapText(text);
        String textAll = formulaTextArea.getText();
        currentPosition = formulaTextArea.getCaretPosition();
        int insert = 0;
        int current = 0;
        if (insertPosition <= currentPosition) {
            insert = insertPosition;
            current = currentPosition;
        } else {
            insert = currentPosition;
            current = insertPosition;
        }
        String beforeIndexOfInsertString = textAll.substring(0, insert);
        String afterIndexofInsertString = textAll.substring(current);
        formulaTextArea.setText(beforeIndexOfInsertString + text + afterIndexofInsertString);
        formulaTextArea.getText();
        if (text.indexOf("()") != -1) {
            formulaTextArea.setCaretPosition(insert + text.length() - 1);
        }
        formulaTextArea.requestFocus();
        insertPosition = formulaTextArea.getCaretPosition();
    }

    protected String wrapText(String text) {
        return text;
    }

    public void onDoubleClick(String currentLineContent) {
        if (ifHasBeenWritten == 0) {
            formulaTextArea.setForeground(Color.black);
            formulaTextArea.setText("");
        }
        formulaTextArea.setForeground(Color.black);
        currentPosition = formulaTextArea.getCaretPosition();
        String output = currentLineContent + "()";
        String textAll = formulaTextArea.getText();
        String textReplaced;
        int position = 0;
        if (insertPosition <= currentPosition) {
            textReplaced = textAll.substring(0, insertPosition) + output + textAll.substring(currentPosition);
            position = insertPosition + output.length() - 1;
        } else {
            textReplaced = textAll.substring(0, currentPosition) + output + textAll.substring(insertPosition);
            position = currentPosition + output.length() - 1;
        }
        formulaTextArea.setText(textReplaced);
        formulaTextArea.requestFocusInWindow();
        formulaTextArea.setCaretPosition(position);
        insertPosition = position;
        ifHasBeenWritten = 1;
    }

    public void onSingleClick() {
        formulaTextArea.requestFocusInWindow();
    }

    public void checkContentValid() {
        // Execute Formula default cell element.
        String formulaText = formulaTextArea.getText().trim();
        if (StringKit.isNotEmpty(formulaText)) {
            JOptionPane.showMessageDialog(
                    BaseFormulaPane.this,
                    (isValidFormula(formulaText) ? I18nKit.getLocText("Plugin-Design_Basic_FormulaD_Valid_Formula") : I18nKit.getLocText("Plugin-Design_Basic_FormulaD_Invalid_Formula")) + ".", ProductConstants.PRODUCT_NAME,
                    JOptionPane.INFORMATION_MESSAGE);
        }
    }

    protected abstract boolean isValidFormula(String formulaText);

    public void onSearch() {
        formulaTextArea.requestFocusInWindow();
    }

    @Override
    public void setOperateListener(OperateListener operateListener) {
        this.operateListener = operateListener;
    }

    @Override
    public String title4PopupWindow() {
        return I18nKit.getLocText("Plugin-Design_Group_Formula_Basic_Title");
    }
}