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package com.juick.api.controllers;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.juick.Message;
import com.juick.User;
import com.juick.server.helpers.Status;
import com.juick.server.helpers.TokensList;
import com.juick.server.util.HttpBadRequestException;
import com.juick.server.util.HttpForbiddenException;
import com.juick.service.MessagesService;
import com.juick.service.PushQueriesService;
import com.juick.service.SubscriptionService;
import com.juick.service.UserService;
import com.juick.util.UserUtils;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import javax.inject.Inject;
import java.io.IOException;
import java.security.Principal;
import java.util.List;
import java.util.stream.Collectors;

/**
 * Created by vitalyster on 24.10.2016.
 */
@Controller
@ResponseBody
public class Notifications {

    @Inject
    PushQueriesService pushQueriesService;
    @Inject
    UserService userService;
    @Inject
    MessagesService messagesService;
    @Inject
    SubscriptionService subscriptionService;

    @RequestMapping(value = "/notifications", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public ResponseEntity<List<String>> doGet(
            @RequestParam String type,
            @RequestParam(required = false, defaultValue = "0") int uid,
            @RequestParam(required = false, defaultValue = "0") int mid) {
        User visitor = UserUtils.getCurrentUser();
        if ((visitor.getUid() == 0) || !(visitor.getName().equals("juick"))) {
            throw new HttpForbiddenException();
        }
        if (uid > 0 && mid == 0) {
            // PM
            switch (type) {
                case "gcm":
                    return ResponseEntity.ok(pushQueriesService.getGCMRegID(uid));
                case "apns":
                    return ResponseEntity.ok(pushQueriesService.getAPNSToken(uid));
                case "mpns":
                    return ResponseEntity.ok(pushQueriesService.getMPNSURL(uid));
                default:
                    throw new HttpBadRequestException();
            }

        } else {
            if (mid > 0) {
                Message msg = messagesService.getMessage(mid);
                if (msg != null) {
                    List<User> users;
                    if (msg.getRid() > 0) {
                        users = subscriptionService.getUsersSubscribedToComments(mid, uid);
                    } else {
                        users = subscriptionService.getSubscribedUsers(msg.getUser().getUid(), mid);
                    }

                    List<Integer> uids = users.stream().map(User::getUid).collect(Collectors.toList());

                    switch (type) {
                        case "gcm":
                            return ResponseEntity.ok(pushQueriesService.getGCMTokens(uids));
                        case "apns":
                            return ResponseEntity.ok(pushQueriesService.getAPNSTokens(uids));
                        case "mpns":
                            return ResponseEntity.ok(pushQueriesService.getMPNSTokens(uids));
                        default:
                            throw new HttpBadRequestException();
                    }
                }
            }
        }
        throw new HttpBadRequestException();
    }

    @RequestMapping(value = "/notifications", method = RequestMethod.DELETE, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Status doDelete(
            @RequestBody String requestBody) throws IOException {
        User visitor = UserUtils.getCurrentUser();
        // FIXME: it is possible to delete other user's tokens
        if ((visitor.getUid() == 0) || !(visitor.getName().equals("juick"))) {
            throw new HttpForbiddenException();
        }
        ObjectMapper mapper = new ObjectMapper();
        mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        mapper.setSerializationInclusion(JsonInclude.Include.NON_DEFAULT);
        TokensList list = mapper.readValue(requestBody, TokensList.class);
        switch (list.getType()) {
            case "gcm":
                list.getTokens().forEach(t -> pushQueriesService.deleteGCMToken(t));
                break;
            case "apns":
                list.getTokens().forEach(t -> pushQueriesService.deleteAPNSToken(t));
                break;
            case "mpns":
                list.getTokens().forEach(t -> pushQueriesService.deleteMPNSToken(t));
                break;
            default:
                throw new HttpBadRequestException();
        }

        return Status.OK;
    }

    @RequestMapping(value = "/notifications", method = RequestMethod.PUT, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Status doPut(
            @RequestBody String requestBody) throws IOException {
        User visitor = UserUtils.getCurrentUser();
        if (visitor.getUid() == 0) {
            throw new HttpForbiddenException();
        }
        ObjectMapper mapper = new ObjectMapper();
        mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        mapper.setSerializationInclusion(JsonInclude.Include.NON_DEFAULT);
        TokensList list = mapper.readValue(requestBody, TokensList.class);
        switch (list.getType()) {
            case "gcm":
                list.getTokens().forEach(t -> pushQueriesService.addGCMToken(visitor.getUid(), t));
                break;
            case "apns":
                list.getTokens().forEach(t -> pushQueriesService.addAPNSToken(visitor.getUid(), t));
                break;
            case "mpns":
                list.getTokens().forEach(t -> pushQueriesService.addMPNSToken(visitor.getUid(), t));
                break;
            default:
                throw new HttpBadRequestException();
        }
        return Status.OK;
    }

    @Deprecated
    @RequestMapping(value = "/android/register", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Status doAndroidRegister(
            @RequestParam(name = "regid") String regId) {
        User visitor = UserUtils.getCurrentUser();
        if (visitor.getUid() == 0) {
            throw new HttpForbiddenException();
        }
        pushQueriesService.addGCMToken(visitor.getUid(), regId);
        return Status.OK;
    }

    @Deprecated
    @RequestMapping(value = "/android/unregister", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Status doAndroidUnRegister(@RequestParam(name = "regid") String regId) {
        pushQueriesService.deleteGCMToken(regId);
        return Status.OK;
    }

    @Deprecated
    @RequestMapping(value = "/winphone/register", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Status doWinphoneRegister(
            Principal principal,
            @RequestParam(name = "url") String regId) {
        User visitor = UserUtils.getCurrentUser();
        pushQueriesService.addMPNSToken(visitor.getUid(), regId);
        return Status.OK;
    }

    @Deprecated
    @RequestMapping(value = "/winphone/unregister", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Status doWinphoneUnRegister(@RequestParam(name = "url") String regId) {
        pushQueriesService.deleteMPNSToken(regId);
        return Status.OK;
    }
}