/*
 * Copyright (C) 2008-2017, Juick
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.juick.server.api;

import com.juick.User;
import com.juick.server.util.HttpForbiddenException;
import com.juick.server.util.HttpNotFoundException;
import com.juick.service.MessagesService;
import com.juick.service.UserService;
import com.juick.server.util.UserUtils;
import com.juick.server.util.WebUtils;
import io.swagger.annotations.ApiOperation;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;

import javax.inject.Inject;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * @author ugnich
 */
@RestController
public class Users {
    @Inject
    private UserService userService;
    @Inject
    private MessagesService messagesService;

    @ApiOperation(value = "This returns user token", notes = "Pass login and password using HTTP Basic")
    @RequestMapping(value = "/auth", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public String getAuthToken() {
        return userService.getHashByUID(UserUtils.getCurrentUser().getUid());
    }

    @RequestMapping(value = "/users", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public List<User> doGetUsers(
            @RequestParam(value = "uname", required = false) List<String> unames) {
        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 (!users.isEmpty())
            return users;
        if (!UserUtils.getCurrentUser().isAnonymous()) {
            return Collections.singletonList(UserUtils.getCurrentUser());
        }

        throw new HttpNotFoundException();
    }

    @GetMapping("/me")
    public SecureUser getMe() {
        User visitor = UserUtils.getCurrentUser();
        SecureUser me = new SecureUser();
        me.setUid(visitor.getUid());
        me.setName(visitor.getName());
        me.setAuthHash(getAuthToken());
        me.setUnreadCount(messagesService.getUnread(visitor).size());
        return me;
    }

    @RequestMapping(value = "/users/read", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public List<User> doGetUserRead(
            @RequestParam String uname) {
        User visitor = UserUtils.getCurrentUser();
        if (visitor.isAnonymous()) {
            throw new HttpForbiddenException();
        }
        int uid = 0;
        if (uname == null) {
            uid = visitor.getUid();
        } else {
            if (WebUtils.isUserName(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(
            @RequestParam String uname) {
        User visitor = UserUtils.getCurrentUser();
        if (visitor.isAnonymous()) {
            throw new HttpForbiddenException();
        }
        int uid = 0;
        if (uname == null) {
            uid = visitor.getUid();
        } else {
            if (WebUtils.isUserName(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();
    }

    class SecureUser extends User {
        public String getHash() {
            return getAuthHash();
        }
    }
}