package view;

import model.Paper;
import command.Command;
import java.util.Scanner;

public class ConsoleView {
    private Scanner scanner;
    
    public ConsoleView() {
        this.scanner = new Scanner(System.in);
    }
    
    public void displayWelcome() {
        System.out.println("===== 学术论文爬虫程序 =====");
        System.out.println("输入 help 查看可用命令");
        System.out.println();
    }
    
    public String getInput() {
        System.out.print("> ");
        return scanner.nextLine().trim();
    }
    
    public void showInfo(String message) {
        System.out.println("[INFO] " + message);
    }
    
    public void showSuccess(String message) {
        System.out.println("[SUCCESS] " + message);
    }
    
    public void showError(String message) {
        System.out.println("[ERROR] " + message);
    }
    
    public void showPaperInfo(int index, Paper paper) {
        System.out.println(index + ". " + paper.getTitle());
        System.out.println("   作者: " + (paper.getAuthors() != null ? paper.getAuthors() : "未知"));
        System.out.println("   来源: " + (paper.getPlatform() != null ? paper.getPlatform() : "未知"));
        System.out.println("   URL: " + (paper.getUrl() != null ? paper.getUrl() : "未知"));
        System.out.println();
    }
    
    public void showCommandInfo(Command command) {
        System.out.println("  " + command.getName() + " - " + command.getDescription());
    }
    
    public void close() {
        scanner.close();
    }
}