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/*
 * Copyright (C) 2008-2020, 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.www.api;

import java.net.URI;
import java.net.URL;
import java.util.List;
import java.util.Optional;

import javax.inject.Inject;

import com.juick.www.api.activity.helpers.ProfileUriBuilder;
import jakarta.validation.constraints.NotNull;

import com.juick.CommandsManager;
import com.juick.model.CommandResult;
import com.juick.model.Message;
import com.juick.model.Reaction;
import com.juick.model.Status;
import com.juick.model.User;
import com.juick.service.MessagesService;
import com.juick.service.StorageService;
import com.juick.service.UserService;
import com.juick.service.activities.UpdateEvent;
import com.juick.util.HttpBadRequestException;
import com.juick.util.HttpForbiddenException;
import com.juick.util.HttpNotFoundException;
import com.juick.util.HttpUtils;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

/**
 * Created by vt on 24/11/2016.
 */
@RestController
public class Post {
    private final static Logger logger = LoggerFactory.getLogger("API");

    @Inject
    private UserService userService;
    @Inject
    private MessagesService messagesService;
    @Inject
    private StorageService storageService;
    @Inject
    CommandsManager commandsManager;
    @Inject
    ApplicationEventPublisher applicationEventPublisher;
    @Inject
    ProfileUriBuilder profileUriBuilder;

    @RequestMapping(value = "/api/post", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)
    @ResponseStatus(value = HttpStatus.OK)
    public CommandResult doPostMessage(
            @ModelAttribute User visitor,
            @RequestParam(required = false, defaultValue = StringUtils.EMPTY) String body,
            @RequestParam(required = false) String img,
            @RequestParam(required = false) MultipartFile attach) throws Exception {
        body = body.replace("\r", StringUtils.EMPTY);

        URI attachmentFName = HttpUtils.receiveMultiPartFile(attach, storageService.getTemporaryDirectory());

        if (StringUtils.isBlank(attachmentFName.toString()) && img != null && img.length() > 10) {
            URI juickUri = URI.create(img);
            if (juickUri.getScheme().equals("juick")) {
                attachmentFName = juickUri;
            } else {
                try {
                    URL imgUrl = new URL(img);
                    attachmentFName = HttpUtils.downloadImage(imgUrl, storageService.getTemporaryDirectory());
                } catch (Exception e) {
                    logger.error("DOWNLOAD ERROR", e);
                    throw new HttpBadRequestException();
                }
            }
        }
        if (StringUtils.isBlank(body) && StringUtils.isBlank(attachmentFName.toString())) {
            // Should be there for compatibility
            throw new HttpBadRequestException();
        }
        return commandsManager.processCommand(visitor, body, attachmentFName);
    }

    @RequestMapping(value = "/api/comment", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)
    public CommandResult doPostComment(
            @ModelAttribute User visitor,
            @RequestParam(defaultValue = "0") int mid,
            @RequestParam(defaultValue = "0") int rid,
            @RequestParam(required = false, defaultValue = StringUtils.EMPTY) final String body,
            @RequestParam(required = false) String img,
            @RequestParam(required = false) MultipartFile attach)
            throws Exception {
        if (mid == 0) {
            throw new HttpBadRequestException();
        }
        Optional<Message> message = messagesService.getMessage(mid);
        if (message.isEmpty()) {
            throw new HttpNotFoundException();
        }

        Message msg = message.get();

        Message reply = null;
        if (rid > 0) {
            reply = messagesService.getReply(mid, rid);
            if (reply == null) {
                throw new HttpNotFoundException();
            }
        }

        if ((msg.ReadOnly && msg.getUser().getUid() != visitor.getUid())
                || userService.isInBL(visitor.getUid(), msg.getUser().getUid())
                || (reply != null && userService.isInBL(visitor.getUid(), reply.getUser().getUid()))) {
            // TODO: validator
            throw new HttpForbiddenException();
        }

        URI attachmentFName = HttpUtils.receiveMultiPartFile(attach, storageService.getTemporaryDirectory());

        if (StringUtils.isBlank(attachmentFName.toString()) && img != null && img.length() > 10) {
            try {
                attachmentFName = HttpUtils.downloadImage(new URL(img), storageService.getTemporaryDirectory());
            } catch (Exception e) {
                logger.error("DOWNLOAD ERROR", e);
                throw new HttpBadRequestException();
            }
        }
        if (StringUtils.isBlank(body) && StringUtils.isBlank(attachmentFName.toString())) {
            // Should be there for compatibility
            throw new HttpBadRequestException();
        }
        return commandsManager.processCommand(visitor, String.format("#%d/%d %s", mid, rid, body),
                attachmentFName);
    }

    @PostMapping("/api/like")
    @ResponseStatus(value = HttpStatus.OK)
    public Status doPostRecommendation(@ModelAttribute User visitor, @RequestParam Integer mid) throws Exception {
        Optional<Message> message = messagesService.getMessage(mid);
        if (message.isEmpty()) {
            throw new HttpNotFoundException();
        }
        Message msg = message.get();
        if (msg.getUser().getUid() == visitor.getUid()) {
            throw new HttpForbiddenException();
        }
        CommandResult status = commandsManager.processCommand(visitor, String.format("! #%d", mid),
                URI.create(StringUtils.EMPTY));
        return Status.getStatus(status.getText());
    }

    @PostMapping("/api/subscribe")
    @ResponseStatus(value = HttpStatus.OK)
    public Status doPostSubscribe(@ModelAttribute User visitor,
                                  @RequestParam Integer mid) throws Exception {
        Optional<Message> message = messagesService.getMessage(mid);
        if (message.isEmpty()) {
            throw new HttpNotFoundException();
        }
        Message msg = message.get();
        if (msg.getUser().getUid() == visitor.getUid()) {
            throw new HttpForbiddenException();
        }
        CommandResult status = commandsManager.processCommand(visitor, String.format("S #%d", mid),
                URI.create(StringUtils.EMPTY));
        return Status.getStatus(status.getText());
    }

    @GetMapping("/api/reactions")
    @ResponseStatus(value = HttpStatus.OK)
    public List<Reaction> reactionsList() {
        return messagesService.listReactions();
    }

    @PostMapping("/api/react")
    @ResponseStatus(value = HttpStatus.OK)
    public Status doPostReact(
            @ModelAttribute User visitor,
            @RequestParam Integer mid, @RequestParam @NotNull int reactionId,
            @RequestParam(required = false, defaultValue = "1") int count) {

        logger.info("got reaction with type: {}", reactionId);
        Optional<Message> message = messagesService.getMessage(mid);
        if (message.isEmpty()) {
            throw new HttpNotFoundException();
        }
        Message msg = message.get();
        if (msg.getUser().getUid() == visitor.getUid()) {
            throw new HttpForbiddenException();
        }
        MessagesService.RecommendStatus recommendStatus = MessagesService.RecommendStatus.Error;
        for (int i = 0; i < count; i++)
            recommendStatus = messagesService.likeMessage(mid, visitor.getUid(),
                    reactionId);

        return  recommendStatus ==  MessagesService.RecommendStatus.Error ? Status.ERROR :Status.OK;
    }

    @PostMapping("/api/update")
    public CommandResult updateMessage(@ModelAttribute User visitor,
                                       @RequestParam Integer mid,
                                       @RequestParam(required = false, defaultValue = "0") Integer rid,
                                       @RequestParam String body) {
        User author = rid == 0 ? messagesService.getMessageAuthor(mid) : messagesService.getReply(mid, rid).getUser();
        if (visitor.equals(author)) {
            if (messagesService.updateMessage(mid, rid, body, false)) {
                Message result = rid == 0 ?
                        messagesService.getMessage(mid).orElseThrow(IllegalStateException::new)
                        : messagesService.getReply(mid, rid);
                applicationEventPublisher.publishEvent(
                        new UpdateEvent(this, author, result));
                return CommandResult.build(result, "Message updated", StringUtils.EMPTY);
            }
            throw new HttpBadRequestException();
        }
        throw new HttpForbiddenException();
    }
}