package com.juick.command;

import com.juick.Message;
import com.juick.User;
import com.juick.formatters.PlainTextFormatter;
import com.juick.server.protocol.ProtocolListener;
import com.juick.service.MessagesService;
import lombok.Getter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

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

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

    private static final Pattern PATTERN = Pattern.compile("^(#+)$", Pattern.CASE_INSENSITIVE);

    private final MessagesService messagesService;

    @Autowired
    public MyFeeds(MessagesService messagesService) {
        this.messagesService = messagesService;
    }

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

    @Override
    public String help() {
        return "# - Show last messages from your feed (## - second page, ...)";
    }

    @Override
    protected String execute(User sender, ProtocolListener protocolListener, String... arguments) {
        // number of # is the page count
        int page = arguments[0].length() - 1;
        List<Integer> mids = getMessagesService().getMyFeed(sender.getUid(), page, false);
        List<Message> messages = getMessagesService().getMessages(mids);
        // TODO: add instructions for empty feed
        return "Your feed: \n" + String.join("\n",
            messages.stream().map(PlainTextFormatter::formatPost).collect(Collectors.toList()));
    }
}