package com.juick.command;

import com.juick.User;
import com.juick.server.protocol.ProtocolListener;
import com.juick.service.SubscriptionService;
import com.juick.service.UserService;
import lombok.Getter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.regex.Pattern;

/**
 * @author ma1uta
 */
@Component
@Getter
public class SubscribeUser extends MultiArgsCommand {

    private static final Pattern PATTERN = Pattern.compile("^([su])\\s+@(\\S+)$", Pattern.CASE_INSENSITIVE);

    private final UserService userService;
    private final SubscriptionService subscriptionService;

    @Autowired
    public SubscribeUser(UserService userService, SubscriptionService subscriptionService) {
        this.userService = userService;
        this.subscriptionService = subscriptionService;
    }

    @Override
    public Pattern pattern() {
        return PATTERN;
    }

    @Override
    public String help() {
        return "S @user - subscribe to user's posts\n U @user - unsubscribe to user's posts";
    }

    @Override
    protected String execute(User sender, ProtocolListener protocolListener, String... arguments) {
        boolean subscribe = arguments[0].equalsIgnoreCase("s");
        User toUser = getUserService().getUserByName(arguments[1]);
        if (toUser.getUid() > 0) {
            if (subscribe) {
                if (getSubscriptionService().subscribeUser(sender, toUser)) {
                    protocolListener.userSubscribed(sender, toUser);
                    return "Subscribed";
                    // TODO: already subscribed case
                }
            } else {
                if (subscriptionService.unSubscribeUser(sender, toUser)) {
                    return "Unsubscribed from @" + toUser.getName();
                }
                return "You was not subscribed to @" + toUser.getName();
            }
        }
        return "Error";
    }
}