package set;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import user.Usrdell;

public class xiugaimima extends JDialog {
    private static final long serialVersionUID = 1L;
    private JPasswordField oldPasswordField;
    private JPasswordField newPasswordField;
    private JPasswordField confirmPasswordField;
    private JButton saveButton;
    private JButton cancelButton;
    private JLabel errorLabel;
    private final Color THEME_COLOR = new Color(46, 139, 87);

    public xiugaimima(Frame owner) {
        super(owner, "修改密码", true);
        initializeUI();
    }

    private void initializeUI() {
        setLayout(new BorderLayout());
        setSize(400, 350);
        setLocationRelativeTo(getOwner());
        setResizable(false);

        JPanel mainPanel = new JPanel(new GridBagLayout());
        mainPanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
        mainPanel.setBackground(Color.WHITE);

        GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(10, 10, 10, 10);
        gbc.fill = GridBagConstraints.HORIZONTAL;

        // 原密码
        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.weightx = 0;
        mainPanel.add(new JLabel("原密码:"), gbc);

        oldPasswordField = createStyledPasswordField();
        gbc.gridx = 1;
        gbc.gridy = 0;
        gbc.weightx = 1.0;
        mainPanel.add(oldPasswordField, gbc);

        // 新密码
        gbc.gridx = 0;
        gbc.gridy = 1;
        gbc.weightx = 0;
        mainPanel.add(new JLabel("新密码:"), gbc);

        JPanel newPasswordPanel = createPasswordPanelWithEye(newPasswordField = createStyledPasswordField());
        gbc.gridx = 1;
        gbc.gridy = 1;
        gbc.weightx = 1.0;
        mainPanel.add(newPasswordPanel, gbc);

        // 确认密码
        gbc.gridx = 0;
        gbc.gridy = 2;
        gbc.weightx = 0;
        mainPanel.add(new JLabel("确认密码:"), gbc);

        JPanel confirmPasswordPanel = createPasswordPanelWithEye(confirmPasswordField = createStyledPasswordField());
        gbc.gridx = 1;
        gbc.gridy = 2;
        gbc.weightx = 1.0;
        mainPanel.add(confirmPasswordPanel, gbc);

        // 错误提示信息
        errorLabel = new JLabel("密码长度不能小于6个字符");
        errorLabel.setForeground(Color.GRAY);
        errorLabel.setFont(new Font("PingFang SC", Font.PLAIN, 12));
        gbc.gridx = 1;
        gbc.gridy = 3;
        gbc.gridwidth = 2;
        gbc.insets = new Insets(0, 10, 10, 10);
        mainPanel.add(errorLabel, gbc);

        // 添加密码输入监听
        DocumentListener passwordListener = new DocumentListener() {
            @Override
            public void insertUpdate(DocumentEvent e) { checkPasswords(); }
            @Override
            public void removeUpdate(DocumentEvent e) { checkPasswords(); }
            @Override
            public void changedUpdate(DocumentEvent e) { checkPasswords(); }
        };
        newPasswordField.getDocument().addDocumentListener(passwordListener);
        confirmPasswordField.getDocument().addDocumentListener(passwordListener);

        add(mainPanel, BorderLayout.CENTER);

        // 按钮面板
        JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 10));
        buttonPanel.setBackground(Color.WHITE);

        saveButton = new JButton("保存");
        saveButton.setBackground(THEME_COLOR);
        saveButton.setForeground(Color.WHITE);
        saveButton.setFocusPainted(false);
        saveButton.setPreferredSize(new Dimension(100, 35));
        saveButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                handleSave();
            }
        });

        cancelButton = new JButton("取消");
        cancelButton.setBackground(new Color(240, 240, 240));
        cancelButton.setForeground(Color.BLACK);
        cancelButton.setFocusPainted(false);
        cancelButton.setPreferredSize(new Dimension(100, 35));
        cancelButton.addActionListener(e -> dispose());

        buttonPanel.add(saveButton);
        buttonPanel.add(cancelButton);

        add(buttonPanel, BorderLayout.SOUTH);
    }

    private JPasswordField createStyledPasswordField() {
        JPasswordField field = new JPasswordField(15);
        field.setPreferredSize(new Dimension(200, 38)); // 设置高度为38，与登录页面一致
        field.setFont(new Font("PingFang SC", Font.PLAIN, 14));
        field.setBorder(BorderFactory.createCompoundBorder(
            BorderFactory.createLineBorder(new Color(200, 200, 200)),
            BorderFactory.createEmptyBorder(8, 10, 8, 10)
        ));
        field.setForeground(new Color(60, 60, 60));
        return field;
    }

    private JPanel createPasswordPanelWithEye(JPasswordField passwordField) {
        JPanel panel = new JPanel(new BorderLayout());
        panel.setBackground(Color.WHITE);
        // 将边框移动到 Panel 上，模拟文本框外观
        panel.setBorder(BorderFactory.createCompoundBorder(
            BorderFactory.createLineBorder(new Color(200, 200, 200)),
            BorderFactory.createEmptyBorder(0, 0, 0, 5)
        ));
        panel.setPreferredSize(new Dimension(200, 38));

        // 移除 Field 的边框，使其融入 Panel
        passwordField.setBorder(BorderFactory.createEmptyBorder(8, 10, 8, 0));
        passwordField.setPreferredSize(null); // 让 BorderLayout 管理大小

        panel.add(passwordField, BorderLayout.CENTER);

        JLabel eyeLabel = new JLabel();
        eyeLabel.setPreferredSize(new Dimension(30, 38));
        eyeLabel.setHorizontalAlignment(SwingConstants.CENTER);
        eyeLabel.setCursor(new Cursor(Cursor.HAND_CURSOR));
        
        // 默认闭眼图标
        eyeLabel.setText("👁"); 
        eyeLabel.setForeground(Color.GRAY);

        eyeLabel.addMouseListener(new MouseAdapter() {
            private boolean isVisible = false;

            @Override
            public void mouseClicked(MouseEvent e) {
                isVisible = !isVisible;
                if (isVisible) {
                    passwordField.setEchoChar((char) 0);
                    eyeLabel.setForeground(THEME_COLOR);
                } else {
                    passwordField.setEchoChar('•');
                    eyeLabel.setForeground(Color.GRAY);
                }
            }
        });

        panel.add(eyeLabel, BorderLayout.EAST);
        return panel;
    }

    private void checkPasswords() {
        String newPass = new String(newPasswordField.getPassword());
        String confirmPass = new String(confirmPasswordField.getPassword());

        // 默认提示
        if (newPass.isEmpty() && confirmPass.isEmpty()) {
            errorLabel.setText("密码长度不能小于6个字符");
            errorLabel.setForeground(Color.GRAY);
            return;
        }

        // 长度检查
        if (newPass.length() > 0 && newPass.length() < 6) {
            errorLabel.setText("密码长度不能小于6个字符");
            errorLabel.setForeground(Color.RED);
            return;
        }

        // 一致性检查
        if (confirmPass.length() > 0) {
            if (confirmPass.length() == newPass.length()) {
                if (!newPass.equals(confirmPass)) {
                    errorLabel.setText("两次输入的新密码不一致");
                    errorLabel.setForeground(Color.RED);
                } else {
                    errorLabel.setText(" "); // 密码一致且长度符合要求
                }
            } else if (confirmPass.length() < newPass.length()) {
                // 正在输入中，如果之前有错误提示，可以清除或恢复默认
                if (newPass.length() >= 6) {
                    errorLabel.setText(" ");
                }
            } else {
                // 确认密码比新密码长，肯定不一致
                errorLabel.setText("两次输入的新密码不一致");
                errorLabel.setForeground(Color.RED);
            }
        } else {
            // 确认密码为空，如果新密码符合长度，清除错误（或者显示默认提示）
            if (newPass.length() >= 6) {
                errorLabel.setText(" ");
            }
        }
    }

    private void handleSave() {
        // 清除之前的错误信息
        // errorLabel.setText(" "); // 不再强制清除，依赖 checkPasswords 的状态，或者重新检查
        
        String oldPass = new String(oldPasswordField.getPassword());
        String newPass = new String(newPasswordField.getPassword());
        String confirmPass = new String(confirmPasswordField.getPassword());

        if (oldPass.isEmpty() || newPass.isEmpty() || confirmPass.isEmpty()) {
            errorLabel.setText("请填写所有字段");
            errorLabel.setForeground(Color.RED);
            return;
        }

        if (newPass.length() < 6) {
            errorLabel.setText("新密码长度不能小于6个字符");
            errorLabel.setForeground(Color.RED);
            return;
        }

        String currentStoredPassword = Usrdell.getProperty("password");
        if (currentStoredPassword == null) {
             currentStoredPassword = "";
        }

        if (!oldPass.equals(currentStoredPassword)) {
            errorLabel.setText("原密码错误");
            errorLabel.setForeground(Color.RED);
            return;
        }

        if (!newPass.equals(confirmPass)) {
            errorLabel.setText("两次输入的新密码不一致");
            errorLabel.setForeground(Color.RED);
            return;
        }

        // 更新密码
        Usrdell.updateProperty("password", newPass);
        JOptionPane.showMessageDialog(this, "密码修改成功", "提示", JOptionPane.INFORMATION_MESSAGE);
        dispose();
    }
}