package com.juick.command;

import com.juick.User;
import com.juick.service.ShowQueriesService;
import lombok.Getter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;
import java.util.regex.Pattern;

/**
 * @author ma1uta
 */
@Component
@Getter
public class Recommendations implements Command {

    private static final Pattern PATTERN = Pattern.compile("@", Pattern.CASE_INSENSITIVE);

    private final ShowQueriesService showQueriesService;

    @Autowired
    public Recommendations(ShowQueriesService showQueriesService) {
        this.showQueriesService = showQueriesService;
    }

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

    @Override
    public String help() {
        return "@ - Show recommendations and popular personal blogs";
    }

    @Override
    public String execute(User sender, MessageListener protocolListener, String command) {
        StringBuilder msg = new StringBuilder();
        msg.append("Recommended blogs");
        List<String> recommendedUsers = getShowQueriesService().getRecommendedUsers(sender);
        if (recommendedUsers.size() > 0) {
            for (String user : recommendedUsers) {
                msg.append("\n@").append(user);
            }
        } else {
            msg.append("\nNo recommendations now. Subscribe to more blogs. ;)");
        }
        msg.append("\n\nTop 10 personal blogs:");
        List<String> topUsers = getShowQueriesService().getTopUsers();
        if (topUsers.size() > 0) {
            for (String user : topUsers) {
                msg.append("\n@").append(user);
            }
        } else {
            msg.append("\nNo top users. Empty DB? ;)");
        }
        return msg.toString();
    }
}