package baseinforinterface;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import data.StockManagementData;
import user.User;
import maininterface.*;

public class LoginFrame extends JFrame implements ActionListener {
  //聲明窗口控件
  JPanel contentPane;
  JLabel nameLabel = new JLabel();
  JLabel passwordLabel = new JLabel();
  JTextField nameTextField = new JTextField();
  JPasswordField passwordField = new JPasswordField();
  JButton loginBtn = new JButton();
  JButton exitBtn = new JButton();
  //聲明數據類
  StockManagementData stockManagementData = null;
  //聲明用戶類
  User user = null;
  //聲明主窗口類
  StockManagementMainFrame stockManagementMainFrame = null;

  public LoginFrame(StockManagementMainFrame stockManagementMainFrame) {
    //取得主窗口對象
    this.stockManagementMainFrame = stockManagementMainFrame;
    //取得主窗口的數據對象
    stockManagementData = stockManagementMainFrame.getStockManagementData();
    try {jbInit();}
    catch(Exception e) {e.printStackTrace();}
  }

  private void jbInit() throws Exception  {
    //取得窗口面板
    contentPane = (JPanel) this.getContentPane();
    //定義窗口面板的布局
    contentPane.setLayout(null);
    //定義窗口的大小和標題
    this.setSize(new Dimension(400, 276));
    //定義標簽的標題、字符大小和位置
    nameLabel.setText("用戶名：");
    nameLabel.setFont(new java.awt.Font("Dialog", 0, 15));
    nameLabel.setBounds(new Rectangle(65, 67, 81, 16));
    passwordLabel.setText("密碼：");
    passwordLabel.setFont(new java.awt.Font("Dialog", 0, 15));
    passwordLabel.setBounds(new Rectangle(65, 112, 79, 16));
    //定義編輯框的位置
    nameTextField.setBounds(new Rectangle(194, 67, 118, 22));
    passwordField.setBounds(new Rectangle(194, 112, 118, 22));
    //定義按鈕的標題、動作字符串、字符大小、位置和加入動作接收器
    loginBtn.setText("登陸");
    loginBtn.setActionCommand("login");
    loginBtn.setFont(new java.awt.Font("Dialog", 0, 15));
    loginBtn.setBounds(new Rectangle(65, 180, 109, 25));
    loginBtn.addActionListener(this);
    exitBtn.setText("退出");
    exitBtn.setActionCommand("exit");
    exitBtn.setFont(new java.awt.Font("Dialog", 0, 15));
    exitBtn.setBounds(new Rectangle(203, 180, 109, 25));
    exitBtn.addActionListener(this);
    //為面板加入各個控件
    contentPane.add(nameLabel, null);
    contentPane.add(nameTextField, null);
    contentPane.add(passwordLabel, null);
    contentPane.add(passwordField, null);
    contentPane.add(exitBtn, null);
    contentPane.add(loginBtn, null);
  }
  protected void processWindowEvent(WindowEvent e) {
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      exit();
    }
  }
  //單擊事件處理代碼
  public void actionPerformed(ActionEvent e) {
    //取得按鈕的動作字符串
    String actionCommand = e.getActionCommand().trim();
    //取得用戶名
    String userName = nameTextField.getText();
    //取得密碼
    String userPassword = new String(passwordField.getPassword());
    if(actionCommand.equals("login")){
      int[] result = stockManagementData.checkUser(userName, userPassword);
      if(result[0] == -1){
        JOptionPane.showMessageDialog(null, "用戶名或者密碼輸入錯誤.");
        return;
      }else{
        //創建用戶類
        user = new User(userName, userPassword, result[0], result[1], result[2],
                        result[3]);
        //將用戶類傳入主窗口
        stockManagementMainFrame.setUser(user);
        //更改主窗口的標題
        stockManagementMainFrame.setTitle("進銷存管理信息系統主窗口" + ":登陸用戶("
                                          + userName + ")");
        //將用戶登陸信息寫入日志數據表
        stockManagementData.createUserLog("登陸窗口", "登陸", userName);
      }
      exit();
    }
    if(actionCommand.equals("exit")){
      exit();
    }
  }
  //退出方法
  public void exit(){
    //將輸入框的值設為空值
    nameTextField.setText("");
    passwordField.setText("");
    //隱藏登陸窗口
    this.setVisible(false);
  }
}