package com.juick.api;

import com.juick.User;
import com.juick.json.UserSerializer;
import com.juick.server.UserQueries;
import com.juick.util.UserUtils;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;

/**
 *
 * @author ugnich
 */
public class Users {

    JdbcTemplate sql;
    
    UserSerializer userSerializer = new UserSerializer();

    public Users(JdbcTemplate sql) {
        this.sql = sql;
    }

    public void doGetUsers(HttpServletRequest request, 
            HttpServletResponse response, int vuid) 
            throws ServletException, IOException {
        List<com.juick.User> users = new ArrayList<>();

        String punames[] = request.getParameterValues("uname");
        if (punames != null) {
            ArrayList<String> unames = new ArrayList<>(Arrays.asList(punames));
            Iterator<String> i = unames.iterator();
            while (i.hasNext()) {
                if (!i.next().matches("^[a-zA-Z0-9\\-]{2,16}$")) {
                    i.remove();
                }
            }
            if (!unames.isEmpty() && unames.size() < 20) {
                users.addAll(UserQueries.getUsersByName(sql, unames));
            }
        }

        String pjids[] = request.getParameterValues("jid");
        if (pjids != null) {
            List<String> jids = new ArrayList<>(Arrays.asList(pjids));
            Iterator<String> ii = jids.iterator();
            while (ii.hasNext()) {
                if (!ii.next().matches("^[a-zA-Z0-9\\-\\_\\@\\.]{6,64}$")) {
                    ii.remove();
                }
            }
            if (!jids.isEmpty() && jids.size() < 20) {
                users.addAll(UserQueries.getUsersByJID(sql, jids));
            }
        }

        if (!users.isEmpty()) {
            String json = userSerializer.serializeList(users);
            Main.replyJSON(request, response, json);
        } else {
            response.sendError(404);
        }
    }

    public void doGetUserRead(HttpServletRequest request, 
            HttpServletResponse response, int vuid) 
            throws ServletException, IOException {
        int uid = 0;
        String uname = request.getParameter("uname");
        if (uname == null) {
            uid = vuid;
        } else {
            if (UserUtils.checkUserNameValid(uname)) {
                com.juick.User u = UserQueries.getUserByName(sql, uname);
                if (u != null && u.getUID() > 0) {
                    uid = u.getUID();
                }
            }
        }

        if (uid > 0) {
            List<Integer> uids = UserQueries.getUserRead(sql, uid);
            if (uids.size() > 0) {
                List<com.juick.User> users = UserQueries.getUsersByID(sql, uids);
                if (users.size() > 0) {
                    String json = userSerializer.serializeList(users);
                    Main.replyJSON(request, response, json);
                    return;
                }
            }
        }
        response.sendError(404);
    }

    public void doGetUserReaders(HttpServletRequest request, 
            HttpServletResponse response, int vuid) 
            throws ServletException, IOException {
        int uid = 0;
        String uname = request.getParameter("uname");
        if (uname == null) {
            uid = vuid;
        } else {
            if (UserUtils.checkUserNameValid(uname)) {
                com.juick.User u = UserQueries.getUserByName(sql, uname);
                if (u != null && u.getUID() > 0) {
                    uid = u.getUID();
                }
            }
        }

        if (uid > 0) {
            List<User> users = UserQueries.getUserReaders(sql, uid);
            String json = userSerializer.serializeList(users);
            Main.replyJSON(request, response, json);
            return;
        }
        response.sendError(404);
    }
}