package com.example.myapp.controller;

import com.example.myapp.Main;
import com.example.myapp.service.EmailService;
import com.example.myapp.service.UserService;
import javafx.fxml.FXML;
import javafx.scene.control.*;

import java.util.Random;

public class RegisterController {
  @FXML private TextField emailField;
  @FXML private Button sendCodeBtn;
  @FXML private TextField codeField;
  @FXML private Button verifyBtn;
  @FXML private Label statusLabel;

  private final UserService userService = UserService.getInstance();
  private EmailService emailService;

  public RegisterController(){
    try {
      emailService = new EmailService();
    } catch(Exception e){
      e.printStackTrace();
    }
  }

  @FXML
  public void onSendCode(){
    String email = emailField.getText().trim();

    // 验证邮箱格式
    if(email.isEmpty()){
      statusLabel.setText("请输入邮箱地址");
      statusLabel.setStyle("-fx-text-fill: red;");
      return;
    }

    if(!isValidEmail(email)){
      statusLabel.setText("请输入有效的邮箱地址");
      statusLabel.setStyle("-fx-text-fill: red;");
      return;
    }

    // 检查邮箱是否已被注册
    if(userService.emailExists(email)){
      // 检查用户是否已完成注册（设置了密码）
      if(userService.isUserRegistered(email)){
        statusLabel.setText("该邮箱已被注册，请直接登录");
        statusLabel.setStyle("-fx-text-fill: red;");
        return;
      } else {
        // 用户已存在但未完成注册，可以重新发送验证码
        statusLabel.setText("该邮箱正在注册流程中，重新发送验证码");
        statusLabel.setStyle("-fx-text-fill: orange;");
      }
    }

    String code = generateCode();
    userService.createPendingUser(email, code);
    try{
      emailService.sendRegistrationCode(email, code);
      statusLabel.setText("注册码已发送到您的邮箱，请查收");
      statusLabel.setStyle("-fx-text-fill: green;");

      // 禁用发送按钮一段时间，防止重复发送
      disableSendButtonTemporarily();

    }catch(Exception e){
      e.printStackTrace();
      statusLabel.setText("发送失败: " + e.getMessage());
      statusLabel.setStyle("-fx-text-fill: red;");
    }
  }

  private String generateCode(){
    Random r = new Random();
    int v = 100000 + r.nextInt(900000);
    return String.valueOf(v);
  }

  @FXML
  public void onVerify(){
    String email = emailField.getText().trim();
    String code = codeField.getText().trim();

    if(email.isEmpty() || code.isEmpty()){
      statusLabel.setText("请输入邮箱和验证码");
      statusLabel.setStyle("-fx-text-fill: red;");
      return;
    }

    if(userService.verifyCode(email, code)){
      statusLabel.setText("验证通过，请设置密码");
      statusLabel.setStyle("-fx-text-fill: green;");
      try {
        Main.showSetPassword(email);
      } catch(Exception e){
        e.printStackTrace();
      }
    } else {
      statusLabel.setText("注册码错误或已过期");
      statusLabel.setStyle("-fx-text-fill: red;");
    }
  }
  @FXML
  public void onClear() {
    emailField.clear();
    codeField.clear();
    statusLabel.setText("");
    sendCodeBtn.setDisable(false);
  }
  @FXML
  public void onBackToLogin() {
    try {
      Main.showLogin();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  private boolean isValidEmail(String email) {
    String emailRegex = "^[a-zA-Z0-9_+&*-]+(?:\\.[a-zA-Z0-9_+&*-]+)*@(?:[a-zA-Z0-9-]+\\.)+[a-zA-Z]{2,7}$";
    return email.matches(emailRegex);
  }

  private void disableSendButtonTemporarily() {
    sendCodeBtn.setDisable(true);
    new java.util.Timer().schedule(
            new java.util.TimerTask() {
              @Override
              public void run() {
                javafx.application.Platform.runLater(() -> {
                  sendCodeBtn.setDisable(false);
                });
              }
            },
            60000 // 60秒后才能重新发送
    );
  }
}