package com.wsf.mathapp.view;

import com.wsf.mathapp.controller.SceneManager;
import com.ybw.mathapp.util.Login;
import com.ybw.mathapp.util.LoginFileUtils;
import com.ybw.mathapp.util.Register;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;

public class LoginView {
  private Scene scene;
  private final SceneManager sceneManager;

  public LoginView(SceneManager sceneManager) {
    this.sceneManager = sceneManager;
    createScene();
  }

  private void createScene() {
    VBox root = new VBox(20);
    root.setPadding(new Insets(40));
    root.setAlignment(Pos.CENTER);

    Label titleLabel = new Label("数学学习软件");
    titleLabel.setFont(Font.font(24));

    Label subtitleLabel = new Label("用户登录");
    subtitleLabel.setFont(Font.font(18));

    // 修改提示文本
    TextField usernameOrEmailField = new TextField();
    usernameOrEmailField.setPromptText("请输入用户名或邮箱");
    usernameOrEmailField.setMaxWidth(300);
    usernameOrEmailField.setPrefHeight(40);

    PasswordField passwordField = new PasswordField();
    passwordField.setPromptText("请输入密码");
    passwordField.setMaxWidth(300);
    passwordField.setPrefHeight(40);

    Button loginButton = new Button("登录");
    loginButton.setStyle("-fx-background-color: #4CAF50; -fx-text-fill: white; -fx-font-size: 14px;");
    loginButton.setPrefSize(300, 40);

    Button registerButton = new Button("注册账号");
    registerButton.setStyle("-fx-background-color: #2196F3; -fx-text-fill: white; -fx-font-size: 14px;");
    registerButton.setPrefSize(300, 40);

    Label statusLabel = new Label();

    loginButton.setOnAction(e -> {
      String usernameOrEmail = usernameOrEmailField.getText().trim();
      String password = passwordField.getText();

      if (usernameOrEmail.isEmpty() || password.isEmpty()) {
        showError(statusLabel, "用户名/邮箱和密码不能为空！");
        return;
      }

      // 调用后端的登录方法，支持用户名或邮箱登录
      boolean success = Login.login(usernameOrEmail, password);
      System.out.println(usernameOrEmail);
      System.out.println(password);
      if (success) {
        showSuccess(statusLabel);
        String username;
        if (LoginFileUtils.emailFindName(usernameOrEmail) == null){
          username = usernameOrEmail;
        }
        else {
          username = LoginFileUtils.emailFindName(usernameOrEmail);
        }
        sceneManager.setCurrentUserName(username);
        sceneManager.showMainMenuView();
      } else {
        showError(statusLabel, "用户名/邮箱或密码错误！");
      }
    });

    registerButton.setOnAction(e -> {
      sceneManager.showRegisterView();
    });

    // 添加回车键登录支持
    usernameOrEmailField.setOnAction(e -> loginButton.fire());
    passwordField.setOnAction(e -> loginButton.fire());

    root.getChildren().addAll(
        titleLabel, subtitleLabel, usernameOrEmailField, passwordField,
        loginButton, registerButton, statusLabel
    );

    scene = new Scene(root, 400, 500);
  }

  private void showError(Label label, String message) {
    label.setText(message);
    label.setStyle("-fx-text-fill: red;");
  }

  private void showSuccess(Label label) {
    label.setText("登录成功！");
    label.setStyle("-fx-text-fill: green;");
  }

  public Scene getScene() {
    return scene;
  }
}