package com.juick.api.controllers;

import com.juick.User;
import com.juick.api.util.HttpForbiddenException;
import com.juick.api.util.HttpNotFoundException;
import com.juick.service.UserService;
import com.juick.util.UserUtils;
import com.juick.util.WebUtils;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.inject.Inject;
import java.security.Principal;
import java.util.ArrayList;
import java.util.List;

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

    @Inject
    UserService userService;

    @RequestMapping(value = "/users", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public List<User> doGetUsers(
            @RequestParam(value = "uname", required = false) List<String> unames,
            @RequestParam(value = "jid", required = false) List<String> jids) {
        List<com.juick.User> users = new ArrayList<>();

        if (unames != null) {
            unames.removeIf(WebUtils::isNotUserName);

            if (!unames.isEmpty() && unames.size() < 20)
                users.addAll(userService.getUsersByName(unames));
        }

        if (jids != null) {
            jids.removeIf(WebUtils::isNotJid);

            if (!jids.isEmpty() && jids.size() < 20)
                users.addAll(userService.getUsersByJID(jids));
        }

        if (!users.isEmpty())
            return users;

        throw new HttpNotFoundException();
    }

    @RequestMapping(value = "/users/read", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public List<User> doGetUserRead(
            Principal principal,
            @RequestParam String uname) {
        String name = UserUtils.getUsername(principal, null);
        User visitor = userService.getUserByName(name);
        int vuid = visitor.getUid();
        if (vuid == 0) {
            throw new HttpForbiddenException();
        }
        int uid = 0;
        if (uname == null) {
            uid = vuid;
        } else {
            if (UserUtils.checkUserNameValid(uname)) {
                com.juick.User u = userService.getUserByName(uname);
                if (u != null && u.getUid() > 0) {
                    uid = u.getUid();
                }
            }
        }

        if (uid > 0) {
            List<Integer> uids = userService.getUserRead(uid);
            if (uids.size() > 0) {
                List<com.juick.User> users = userService.getUsersByID(uids);
                if (users.size() > 0) {
                    return users;
                }
            }
        }
        throw new HttpNotFoundException();
    }

    @RequestMapping(value = "/users/readers", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public List<User> doGetUserReaders(
            Principal principal,
            @RequestParam String uname) {
        String name = UserUtils.getUsername(principal, null);
        User visitor = userService.getUserByName(name);
        int vuid = visitor.getUid();
        if (vuid == 0) {
            throw new HttpForbiddenException();
        }
        int uid = 0;
        if (uname == null) {
            uid = vuid;
        } else {
            if (UserUtils.checkUserNameValid(uname)) {
                com.juick.User u = userService.getUserByName(uname);
                if (u != null && u.getUid() > 0) {
                    uid = u.getUid();
                }
            }
        }

        if (uid > 0) {
            return userService.getUserReaders(uid);
        }
        throw new HttpNotFoundException();
    }
}