package com.example.datacollect.w9.controller;

import com.example.datacollect.w9.command.*;
import com.example.datacollect.w9.model.Article;
import com.example.datacollect.w9.view.ConsoleView;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class CrawlerController {
    private final Map<String, Command> commands = new HashMap<>();
    private final Map<String, String> aliases = new HashMap<>();
    private final ConsoleView view;
    private final List<Article> articles;
    private final List<String> history = new ArrayList<>();

    public CrawlerController(ConsoleView view, List<Article> articles) {
        this.view = view;
        this.articles = articles;
        register(new HelpCommand(view));
        register(new ListCommand(view));
        register(new CrawlCommand(view, articles));
        register(new ExitCommand(view));
        register(new HistoryCommand(view, history));
        registerAlias("c", "crawl"); // 别名 c = crawl
    }

    private void register(Command command) {
        commands.put(command.getName(), command);
    }

    private void registerAlias(String alias, String commandName) {
        aliases.put(alias, commandName);
    }

    public void handle(String input) {
        String text = input == null ? "" : input.trim();
        if (text.isEmpty()) return;

        history.add(text);

        String[] args = text.split("\\s+");
        String cmdName = args[0].toLowerCase();

        if (aliases.containsKey(cmdName)) {
            cmdName = aliases.get(cmdName);
        }

        Command command = commands.get(cmdName);
        if (command == null) {
            view.printError("Unknown command: " + cmdName);
            return;
        }
        command.execute(args, articles);
    }
}