package command;

import model.CrawlResult;
import exception.CrawlerException;
import view.CrawlerView;

import java.util.ArrayList;
import java.util.List;

public class CommandInvoker {
    private final List<Command> commands;
    private final CrawlerView view;

    public CommandInvoker(CrawlerView view) {
        this.commands = new ArrayList<>();
        this.view = view;
    }

    public void addCommand(Command command) {
        commands.add(command);
    }

    public List<CrawlResult> executeAll() throws CrawlerException {
        List<CrawlResult> allResults = new ArrayList<>();

        for (Command command : commands) {
            view.showHeader("执行命令: " + command.getName());
            try {
                List<CrawlResult> results = command.execute();
                allResults.addAll(results);
            } catch (CrawlerException e) {
                view.showError("命令 " + command.getName() + " 执行失败: " + e.getMessage());
                throw e;
            }
            view.showLine();
        }

        return allResults;
    }

    public void clearCommands() {
        commands.clear();
    }

    public int getCommandCount() {
        return commands.size();
    }
}