<?php
/**
 * ownCloud - News
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 *
 * @author Alessandro Cosentino <cosenal@gmail.com>
 * @author Bernhard Posselt <dev@bernhard-posselt.com>
 * @copyright Alessandro Cosentino 2012
 * @copyright Bernhard Posselt 2012, 2014
 */

namespace OCA\News\Controller;

use OCP\IRequest;
use OCP\IConfig;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http;

use OCA\News\Service\ItemService;
use OCA\News\Service\FeedService;
use OCA\News\Service\FolderService;
use OCA\News\Service\ServiceNotFoundException;
use OCA\News\Service\ServiceConflictException;
use OCA\News\Db\FeedType;


class FeedController extends Controller {

    use JSONHttpError;

    private $feedService;
    private $folderService;
    private $itemService;
    private $userId;
    private $settings;

    public function __construct($AppName,
                                IRequest $request,
                                FolderService $folderService,
                                FeedService $feedService,
                                ItemService $itemService,
                                IConfig $settings,
                                $UserId){
        parent::__construct($AppName, $request);
        $this->feedService = $feedService;
        $this->folderService = $folderService;
        $this->itemService = $itemService;
        $this->userId = $UserId;
        $this->settings = $settings;
    }


    /**
     * @NoAdminRequired
     */
    public function index(){

        // this method is also used to update the interface
        // because of this we also pass the starred count and the newest
        // item id which will be used for marking feeds read
        $params = [
            'feeds' => $this->feedService->findAll($this->userId),
            'starred' => $this->itemService->starredCount($this->userId)
        ];

        try {
            $params['newestItemId'] =
                $this->itemService->getNewestItemId($this->userId);

        // An exception occurs if there is a newest item. If there is none,
        // simply ignore it and do not add the newestItemId
        } catch (ServiceNotFoundException $ex) {}

        return $params;
    }


    /**
     * @NoAdminRequired
     */
    public function active(){
        $feedId = (int) $this->settings->getUserValue($this->userId,
            $this->appName,'lastViewedFeedId');
        $feedType = $this->settings->getUserValue($this->userId, $this->appName,
            'lastViewedFeedType');

        // cast from null to int is 0
        if($feedType !== null){
            $feedType = (int) $feedType;
        }

        // check if feed or folder exists
        try {
            if($feedType === FeedType::FOLDER){
                $this->folderService->find($feedId, $this->userId);

            } elseif ($feedType === FeedType::FEED){
                $this->feedService->find($feedId, $this->userId);

            // if its the first launch, those values will be null
            } elseif($feedType === null){
                throw new ServiceNotFoundException('');
            }

        } catch (ServiceNotFoundException $ex){
            $feedId = 0;
            $feedType = FeedType::SUBSCRIPTIONS;
        }

        return [
            'activeFeed' => [
                'id' => $feedId,
                'type' => $feedType
            ]
        ];
    }


    /**
     * @NoAdminRequired
     *
     * @param string $url
     * @param int $parentFolderId
     * @param string $title
     * @return array|\OCP\AppFramework\Http\JSONResponse
     */
    public function create($url, $parentFolderId, $title){
        try {
            // we need to purge deleted feeds if a feed is created to
            // prevent already exists exceptions
            $this->feedService->purgeDeleted($this->userId, false);

            $feed = $this->feedService->create($url, $parentFolderId,
                                               $this->userId, $title);
            $params = ['feeds' => [$feed]];

            try {
                $params['newestItemId'] =
                    $this->itemService->getNewestItemId($this->userId);

            // An exception occurs if there is a newest item. If there is none,
            // simply ignore it and do not add the newestItemId
            } catch (ServiceNotFoundException $ex) {}

            return $params;

        } catch(ServiceConflictException $ex) {
            return $this->error($ex, Http::STATUS_CONFLICT);
        } catch(ServiceNotFoundException $ex) {
            return $this->error($ex, Http::STATUS_UNPROCESSABLE_ENTITY);
        }

    }


    /**
     * @NoAdminRequired
     *
     * @param int $feedId
     * @return array|\OCP\AppFramework\Http\JSONResponse
     */
    public function delete($feedId){
        try {
            $this->feedService->markDeleted($feedId, $this->userId);
        } catch(ServiceNotFoundException $ex) {
            return $this->error($ex, Http::STATUS_NOT_FOUND);
        }

        return [];
    }


    /**
     * @NoAdminRequired
     *
     * @param int $feedId
     * @return array|\OCP\AppFramework\Http\JSONResponse
     */
    public function update($feedId){
        try {
            $feed = $this->feedService->update($feedId, $this->userId);

            return [
                'feeds' => [
                    // only pass unread count to not accidentally readd
                    // the feed again
                    [
                        'id' => $feed->getId(),
                        'unreadCount' => $feed->getUnreadCount()
                    ]
                ]
            ];

        } catch(ServiceNotFoundException $ex) {
            return $this->error($ex, Http::STATUS_NOT_FOUND);
        }

    }


    /**
     * @NoAdminRequired
     *
     * @param int $feedId
     * @param int $parentFolderId
     * @return array|\OCP\AppFramework\Http\JSONResponse
     */
    public function move($feedId, $parentFolderId){
        try {
            $this->feedService->move($feedId, $parentFolderId, $this->userId);
        } catch(ServiceNotFoundException $ex) {
            return $this->error($ex, Http::STATUS_NOT_FOUND);
        }

        return [];
    }

    /**
     * @NoAdminRequired
     *
     * @param int $feedId
     * @param string $feedTitle
     * @return array|\OCP\AppFramework\Http\JSONResponse
     */
    public function rename($feedId, $feedTitle) {
        try {
            $this->feedService->rename($feedId, $feedTitle, $this->userId);
        } catch(ServiceNotFoundException $ex) {
            return $this->error($ex, Http::STATUS_NOT_FOUND);
        }

        return [];
    }


    /**
     * @NoAdminRequired
     *
     * @param array $json
     * @return array
     */
    public function import($json) {
        $feed = $this->feedService->importArticles($json, $this->userId);

        $params = [
            'starred' => $this->itemService->starredCount($this->userId)
        ];

        if($feed) {
            $params['feeds'] = [$feed];
        }

        return $params;
    }


    /**
     * @NoAdminRequired
     *
     * @param int $feedId
     * @param int $highestItemId
     * @return array
     */
    public function read($feedId, $highestItemId){
        $this->itemService->readFeed($feedId, $highestItemId, $this->userId);

        return [
            'feeds' => [
                [
                    'id' => $feedId,
                    'unreadCount' => 0
                ]
            ]
        ];
    }


    /**
     * @NoAdminRequired
     *
     * @param int $feedId
     * @return array|\OCP\AppFramework\Http\JSONResponse
     */
    public function restore($feedId){
        try {
            $this->feedService->unmarkDeleted($feedId, $this->userId);
        } catch(ServiceNotFoundException $ex) {
            return $this->error($ex, Http::STATUS_NOT_FOUND);
        }

        return [];
    }


    /**
     * @NoAdminRequired
     *
     * @param int $feedId
     * @param int $ordering
     */
    public function ordering($feedId, $ordering) {
        try {
            $this->feedService->setOrdering($feedId, $ordering, $this->userId);
        } catch(ServiceNotFoundException $ex) {
            return $this->error($ex, Http::STATUS_NOT_FOUND);
        }

        return [];
    }


    /**
     * @NoAdminRequired
     *
     * @param int $feedId
     * @param bool $fullTextEnabled
     */
    public function enableFullText($feedId, $fullTextEnabled=false) {
        try {
            $this->feedService->enableFullText($feedId, $fullTextEnabled,
                                               $this->userId);
        } catch(ServiceNotFoundException $ex) {
            return $this->error($ex, Http::STATUS_NOT_FOUND);
        }

        return [];
    }


    /**
     * @NoAdminRequired
     *
     * @param int $feedId
     * @param bool $isPinned
     */
    public function pinned($feedId, $isPinned=false) {
        try {
            $this->feedService->setPinned($feedId, $isPinned, $this->userId);
        } catch(ServiceNotFoundException $ex) {
            return $this->error($ex, Http::STATUS_NOT_FOUND);
        }

        return [];
    }

}