package com.mathlearning.view;

import com.mathlearning.controller.AuthController;
import com.mathlearning.service.EmailService;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;

public class RegisterFrame extends JFrame {
  private AuthController authController;
  private JTextField emailField;
  private JLabel resultLabel;
  private JButton registerButton;
  private Timer countdownTimer;
  private int remainingTime = 0;
  private JTextField codeField;
  private JButton submitButton;
  private String currentEmail; // 存储当前正在注册的邮箱

  public RegisterFrame() {
    this.authController = new AuthController();
    initializeUI();
  }

  private void initializeUI() {
    setTitle("数学学习软件 - 注册");
    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    setSize(500, 300); // 保持原有宽度以显示更长的提示信息
    setLocationRelativeTo(null);
    setResizable(false);

    JPanel mainPanel = new JPanel(new BorderLayout(10, 10));
    mainPanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

    // 添加顶部返回按钮
    JPanel topPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    JButton backButton = new JButton("← 返回登录");
    backButton.setFont(new Font("Microsoft YaHei", Font.PLAIN, 12));
    backButton.setBackground(new Color(200, 250, 190));
    backButton.addActionListener(e -> backToLogin());
    topPanel.add(backButton);
    mainPanel.add(topPanel, BorderLayout.NORTH);

    JLabel titleLabel = new JLabel("用户注册", JLabel.CENTER);
    titleLabel.setFont(new Font("Microsoft YaHei", Font.BOLD, 18));
    mainPanel.add(titleLabel, BorderLayout.CENTER);

    JPanel formPanel = new JPanel(new GridLayout(3, 2, 10, 10));
    formPanel.setLayout(null);
    JLabel emailLabel = new JLabel("邮箱地址:");
    emailLabel.setFont(new Font("Microsoft YaHei", Font.PLAIN, 14));
    emailLabel.setBounds(20, 20, 100, 20);
    emailField = new JTextField();
    emailField.setBounds(100, 20, 180, 30);
    // 添加邮箱输入框的焦点监听器，实现实时验证
    emailField.addFocusListener(
        new FocusListener() {
          @Override
          public void focusGained(FocusEvent e) {
            // 获得焦点时不清除内容
          }

          @Override
          public void focusLost(FocusEvent e) {
            // 失去焦点时验证邮箱格式
            validateEmailInRealTime();
          }
        });

    // 添加输入监听器，实现输入时实时验证
    emailField
        .getDocument()
        .addDocumentListener(
            new javax.swing.event.DocumentListener() {
              public void insertUpdate(javax.swing.event.DocumentEvent e) {
                validateEmailInRealTime();
              }

              public void removeUpdate(javax.swing.event.DocumentEvent e) {
                validateEmailInRealTime();
              }

              public void changedUpdate(javax.swing.event.DocumentEvent e) {
                validateEmailInRealTime();
              }
            });

    registerButton = new JButton("获取注册码");
    registerButton.setFont(new Font("Microsoft YaHei", Font.PLAIN, 14));
    registerButton.setBounds(285, 20, 140, 30);
    registerButton.setEnabled(false); // 初始时禁用
    JLabel codeLabel = new JLabel("注册码:");
    codeLabel.setFont(new Font("Microsoft YaHei", Font.PLAIN, 14));
    codeLabel.setBounds(20, 60, 100, 20);
    codeField = new JTextField();
    codeField.setBounds(100, 60, 180, 30);
    codeField.setEnabled(false); // 初始时禁用

    submitButton = new JButton("注册");
    submitButton.setFont(new Font("Microsoft YaHei", Font.PLAIN, 14));
    submitButton.setBounds(285, 60, 140, 30);
    submitButton.setEnabled(false); // 初始时禁用

    formPanel.add(emailLabel);
    formPanel.add(emailField);
    formPanel.add(new JLabel());
    formPanel.add(registerButton);
    formPanel.add(codeLabel);
    formPanel.add(codeField);
    formPanel.add(submitButton);

    resultLabel = new JLabel("请输入有效的邮箱地址", JLabel.CENTER);
    resultLabel.setFont(new Font("Microsoft YaHei", Font.PLAIN, 12));
    resultLabel.setForeground(Color.BLUE);

    mainPanel.add(formPanel, BorderLayout.CENTER);
    mainPanel.add(resultLabel, BorderLayout.SOUTH);
    registerButton.addActionListener(new RegisterAction());
    submitButton.addActionListener(new SubmitAction());
    countdownTimer = new Timer(1000, new CountdownAction());

    add(mainPanel);
  }

  // 实时验证邮箱格式
  private void validateEmailInRealTime() {
    try {
      String email = emailField.getText().trim();

      if (email.isEmpty()) {
        resultLabel.setText("请输入邮箱地址");
        resultLabel.setForeground(Color.BLUE);
        registerButton.setEnabled(false);
        return;
      }

      String validationMessage = authController.getEmailValidationMessage(email);

      if (validationMessage.equals("邮箱格式正确")) {
        resultLabel.setText("✓ 邮箱格式正确");
        resultLabel.setForeground(new Color(0, 150, 0)); // 绿色
        registerButton.setEnabled(true);
      } else {
        resultLabel.setText("✗ " + validationMessage);
        resultLabel.setForeground(Color.RED);
        registerButton.setEnabled(false);
      }
    } catch (Exception e) {
      resultLabel.setText("✗ 邮箱验证服务暂时不可用");
      resultLabel.setForeground(Color.RED);
      registerButton.setEnabled(false);
    }
  }

  private class RegisterAction implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
      if (EmailService.isNetworkAvailable()) {
        String email = emailField.getText().trim();
        if (email.isEmpty()) {
          resultLabel.setText("请输入邮箱地址");
          resultLabel.setForeground(Color.RED);
          return;
        }
        String validationMessage = authController.getEmailValidationMessage(email); // 再次验证邮箱格式
        if (!validationMessage.equals("邮箱格式正确")) {
          resultLabel.setText("✗ " + validationMessage);
          resultLabel.setForeground(Color.RED);
          return;
        }
        String result = authController.register(email);
        resultLabel.setText(result);
        if (result.contains("发送")) {
          resultLabel.setForeground(Color.BLUE);
          currentEmail = email; // 保存当前邮箱
          remainingTime = 120; // 开始倒计时
          registerButton.setEnabled(false);
          codeField.setEnabled(true); // 启用验证码输入框
          submitButton.setEnabled(true); // 启用注册按钮
          updateRegisterButtonText();
          countdownTimer.start();
        } else {
          resultLabel.setForeground(Color.RED);
        }
      } else {
        showDialog();
      }
    }
  }

  private class SubmitAction implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
      String code = codeField.getText().trim();

      if (code.isEmpty()) {
        resultLabel.setText("请输入验证码");
        resultLabel.setForeground(Color.RED);
        return;
      }

      if (currentEmail == null) {
        resultLabel.setText("请先获取验证码");
        resultLabel.setForeground(Color.RED);
        return;
      }

      // 使用AuthController验证验证码
      if (authController.isCodeRegistered(currentEmail, code)) {
        countdownTimer.stop();
        resultLabel.setText("验证码正确，正在跳转...");
        resultLabel.setForeground(new Color(0, 150, 0));

        // 延迟跳转到密码设置界面
        Timer openTimer =
            new Timer(
                1000,
                evt -> {
                  openPasswordSetupFrame(currentEmail, code);
                });
        openTimer.setRepeats(false);
        openTimer.start();
      } else {
        resultLabel.setText("验证码错误或已过期，请重新输入");
        resultLabel.setForeground(Color.RED);
      }
    }
  }

  private class CountdownAction implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
      remainingTime--;
      updateRegisterButtonText();

      if (remainingTime <= 0) {
        countdownTimer.stop();
        registerButton.setEnabled(true);
        registerButton.setText("获取注册码");
        codeField.setEnabled(false);
        submitButton.setEnabled(false);
        resultLabel.setText("验证码已过期，请重新获取");
        resultLabel.setForeground(Color.RED);
      }
    }
  }

  private void updateRegisterButtonText() {
    registerButton.setText(String.format("重新发送(%ds)", remainingTime));
  }

  private void backToLogin() {
    if (countdownTimer != null && countdownTimer.isRunning()) {
      countdownTimer.stop();
    }
    LoginFrame loginFrame = new LoginFrame();
    loginFrame.setVisible(true);
    this.dispose();
  }

  private void openPasswordSetupFrame(String email, String code) {
    try {
      PasswordSetupFrame passwordFrame = new PasswordSetupFrame(email, code, authController);
      passwordFrame.setVisible(true);
      this.dispose();
    } catch (Exception e) {
      System.out.println("打开密码设置界面时发生异常: " + e.getMessage());
      JOptionPane.showMessageDialog(this, "打开密码设置界面失败，请重试", "错误", JOptionPane.ERROR_MESSAGE);
    }
  }

  private void showDialog() {
    JOptionPane.showMessageDialog(this, "网络连接失败，请稍后再试", "错误", JOptionPane.ERROR_MESSAGE);
  }
}