package com.mathgenerator.controller;

import com.mathgenerator.service.UserService;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.stage.Stage;
import java.io.IOException;

public class RegisterController {

    private final UserService userService = new UserService();
    private String sentCode; // 用于存储已发送的验证码

    @FXML private TextField usernameField;
    @FXML private TextField emailField;
    @FXML private TextField verificationCodeField;
    @FXML private PasswordField passwordField;
    @FXML private PasswordField confirmPasswordField;
    @FXML private Button sendCodeButton;
    @FXML private Button registerButton;
    @FXML private Button backToLoginButton;
    @FXML private Label statusLabel;

    @FXML
    private void handleSendCodeAction(ActionEvent event) {
        String email = emailField.getText();
        if (email.isEmpty() || !email.contains("@")) {
            statusLabel.setText("请输入一个有效的邮箱地址！");
            return;
        }
        // 调用后端服务发送验证码（模拟）
        this.sentCode = userService.sendVerificationCode(email);
        statusLabel.setText("验证码已发送（请查看控制台输出）。");
        sendCodeButton.setDisable(true); // 防止重复点击
    }

    @FXML
    private void handleRegisterAction(ActionEvent event) {
        // 1. 字段校验
        if (usernameField.getText().isEmpty() || emailField.getText().isEmpty() ||
                verificationCodeField.getText().isEmpty() || passwordField.getText().isEmpty()) {
            statusLabel.setText("所有字段都不能为空！");
            return;
        }
        if (!passwordField.getText().equals(confirmPasswordField.getText())) {
            statusLabel.setText("两次输入的密码不匹配！");
            return;
        }
        if (this.sentCode == null || !this.sentCode.equals(verificationCodeField.getText())) {
            statusLabel.setText("验证码错误！");
            return;
        }
        if (!UserService.isPasswordValid(passwordField.getText())) {
            statusLabel.setText("密码格式错误！必须为6-10位，且包含大小写字母和数字。");
            return;
        }

        // 2. 调用后端服务进行注册
        boolean success = userService.register(
                usernameField.getText(),
                emailField.getText(),
                passwordField.getText()
        );

        // 3. 根据结果更新UI
        if (success) {
            statusLabel.setText("注册成功！请返回登录。");
            registerButton.setDisable(true);
        } else {
            statusLabel.setText("注册失败：用户名或邮箱已被占用。");
        }
    }

    @FXML
    private void handleBackToLoginAction(ActionEvent event) {
        loadScene("/com/mathgenerator/view/LoginView.fxml");
    }

    private void loadScene(String fxmlPath) {
        try {
            Parent root = FXMLLoader.load(getClass().getResource(fxmlPath));
            Stage stage = (Stage) backToLoginButton.getScene().getWindow();
            stage.setScene(new Scene(root));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}