<?php
/**
 * Nextcloud - passman
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 *
 * @author Sander Brand <brantje@gmail.com>
 * @copyright Sander Brand 2016
 */

namespace OCA\Passman\Controller;

use OCA\Passman\Db\Credential;
use OCA\Passman\Db\SharingACL;
use OCA\Passman\Service\EncryptService;
use OCA\Passman\Service\SettingsService;
use OCA\Passman\Utility\NotFoundJSONResponse;
use OCP\AppFramework\Db\DoesNotExistException;
use OCP\AppFramework\Http;
use OCP\AppFramework\Http\DataResponse;
use OCP\IRequest;
use OCP\AppFramework\Http\JSONResponse;
use OCP\AppFramework\ApiController;
use OCA\Passman\Service\CredentialService;
use OCA\Passman\Activity;
use OCA\Passman\Service\ActivityService;
use OCA\Passman\Service\CredentialRevisionService;
use OCA\Passman\Service\ShareService;


class CredentialController extends ApiController {
	private $userId;
	private $credentialService;
	private $activityService;
	private $credentialRevisionService;
	private $sharingService;
	private $settings;

	public function __construct($AppName,
								IRequest $request,
								$userId,
								CredentialService $credentialService,
								ActivityService $activityService,
								CredentialRevisionService $credentialRevisionService,
								ShareService $sharingService,
								SettingsService $settings

	) {
		parent::__construct(
			$AppName,
			$request,
			'GET, POST, DELETE, PUT, PATCH, OPTIONS',
			'Authorization, Content-Type, Accept',
			86400);
		$this->userId = $userId;
		$this->credentialService = $credentialService;
		$this->activityService = $activityService;
		$this->credentialRevisionService = $credentialRevisionService;
		$this->sharingService = $sharingService;
		$this->settings = $settings;
	}


	/**
	 * @NoAdminRequired
	 * @NoCSRFRequired
	 */
	public function createCredential($changed, $created,
									 $credential_id, $custom_fields, $delete_time,
									 $description, $email, $expire_time, $favicon, $files, $guid,
									 $hidden, $label, $otp, $password, $renew_interval,
									 $tags, $url, $username, $vault_id) {
		$credential = array(
			'credential_id' => $credential_id,
			'guid' => $guid,
			'user_id' => $this->userId,
			'vault_id' => $vault_id,
			'label' => $label,
			'description' => $description,
			'created' => $created,
			'changed' => $changed,
			'tags' => $tags,
			'email' => $email,
			'username' => $username,
			'password' => $password,
			'url' => $url,
			'favicon' => $favicon,
			'renew_interval' => $renew_interval,
			'expire_time' => $expire_time,
			'delete_time' => $delete_time,
			'files' => $files,
			'custom_fields' => $custom_fields,
			'otp' => $otp,
			'hidden' => $hidden,

		);

		$credential = $this->credentialService->createCredential($credential);
		$link = ''; // @TODO create direct link to credential
		if (!$credential->getHidden()) {
			$this->activityService->add(
				Activity::SUBJECT_ITEM_CREATED_SELF, array($label, $this->userId),
				'', array(),
				$link, $this->userId, Activity::TYPE_ITEM_ACTION);
		}
		return new JSONResponse($credential);
	}

	/**
	 * @NoAdminRequired
	 * @NoCSRFRequired
	 */
	public function getCredential($credential_guid) {
		$credential = $this->credentialService->getCredentialByGUID($credential_guid, $this->userId);
		return new JSONResponse($credential);
	}

	/**
	 * @NoAdminRequired
	 * @NoCSRFRequired
	 */
	public function updateCredential($changed, $created,
									 $credential_id, $custom_fields, $delete_time, $credential_guid,
									 $description, $email, $expire_time, $favicon, $files, $guid,
									 $hidden, $label, $otp, $password, $renew_interval,
									 $tags, $url, $username, $vault_id, $revision_created, $shared_key, $acl, $unshare_action, $set_share_key, $skip_revision) {


		$storedCredential = $this->credentialService->getCredentialByGUID($credential_guid);

		$credential = array(
			'credential_id' => $credential_id,
			'guid' => $guid,
			'label' => $label,
			'description' => $description,
			'created' => $created,
			'changed' => $changed,
			'vault_id' => $vault_id,
			'tags' => $tags,
			'email' => $email,
			'username' => $username,
			'password' => $password,
			'url' => $url,
			'favicon' => $favicon,
			'renew_interval' => $renew_interval,
			'expire_time' => $expire_time,
			'files' => $files,
			'custom_fields' => $custom_fields,
			'delete_time' => $delete_time,
			'hidden' => $hidden,
			'otp' => $otp,
			'user_id' => $storedCredential->getUserId()
		);


		if (!hash_equals($storedCredential->getUserId(), $this->userId)) {
			$acl = $this->sharingService->getCredentialAclForUser($this->userId, $storedCredential->getGuid());
			if ($acl->hasPermission(SharingACL::WRITE)) {
				$credential['shared_key'] = $storedCredential->getSharedKey();
			} else {
				return new DataResponse(['msg' => 'Not authorized'], Http::STATUS_UNAUTHORIZED);
			}
			if (!$this->settings->isEnabled('user_sharing_enabled')) {
				return new DataResponse(['msg' => 'Not authorized'], Http::STATUS_UNAUTHORIZED);
			}
		}


		$link = ''; // @TODO create direct link to credential
		if ($revision_created) {
			$activity = 'item_apply_revision';
			$this->activityService->add(
				$activity . '_self', array($label, $this->userId, $revision_created),
				'', array(),
				$link, $this->userId, Activity::TYPE_ITEM_ACTION);
		} else if (($storedCredential->getDeleteTime() === 0) && (int)$delete_time > 0) {
			$activity = 'item_deleted';
			$this->activityService->add(
				$activity . '_self', array($label, $this->userId),
				'', array(),
				$link, $this->userId, Activity::TYPE_ITEM_ACTION);
		} else if (($storedCredential->getDeleteTime() > 0) && (int)$delete_time === 0) {
			$activity = 'item_recovered';
			$this->activityService->add(
				$activity . '_self', array($label, $this->userId),
				'', array(),
				$link, $this->userId, Activity::TYPE_ITEM_ACTION);
		} else if ($label !== $storedCredential->getLabel()) {
			$activity = 'item_renamed';
			$this->activityService->add(
				$activity . '_self', array($storedCredential->getLabel(), $label, $this->userId),
				'', array(),
				$link, $this->userId, Activity::TYPE_ITEM_RENAMED);
		} else {
			$activity = 'item_edited';
			$this->activityService->add(
				$activity . '_self', array($label, $this->userId),
				'', array(),
				$link, $this->userId, Activity::TYPE_ITEM_ACTION);
		}
		$acl_list = null;

		try {
			$acl_list = $this->sharingService->getCredentialAclList($storedCredential->getGuid());
		} catch (\Exception $exception) {
			// Just check if we have an acl list
		}
		if (!empty($acl_list)) {
			$params = array();
			switch ($activity) {
				case 'item_recovered':
				case 'item_deleted':
				case 'item_edited':
					$params = array($credential['label'], $this->userId);
					break;
				case 'item_apply_revision':
					$params = array($credential['label'], $this->userId, $revision_created);
					break;
				case 'item_renamed':
					$params = array($storedCredential->getLabel(), $label, $this->userId);
					break;
			}

			foreach ($acl_list as $sharingACL) {
				$target_user = $sharingACL->getUserId();
				if ($target_user === $this->userId) {
					continue;
				}
				$this->activityService->add(
					$activity, $params,
					'', array(),
					$link, $target_user, Activity::TYPE_ITEM_ACTION);
			}
			if (!hash_equals($this->userId, $storedCredential->getUserId())) {
				$this->activityService->add(
					$activity, $params,
					'', array(),
					$link, $storedCredential->getUserId(), Activity::TYPE_ITEM_ACTION);
			}
		}
		if ($set_share_key === true) {
			$storedCredential->setSharedKey($shared_key);
			$credential['shared_key'] = $shared_key;
		}
		if ($unshare_action === true) {
			$storedCredential->setSharedKey('');
			$credential['shared_key'] = '';
		}

		if (!isset($credential['shared_key'])) {
			$credential['shared_key'] = $storedCredential->getSharedKey();
		}

		if (!$skip_revision) {
			$this->credentialRevisionService->createRevision($storedCredential, $storedCredential->getUserId(), $credential_id, $this->userId);
		}

		$credential = $this->credentialService->updateCredential($credential);

		return new JSONResponse($credential);
	}

	/**
	 * @NoAdminRequired
	 * @NoCSRFRequired
	 */
	public function deleteCredential($credential_guid) {
		try {
			$credential = $this->credentialService->getCredentialByGUID($credential_guid, $this->userId);
		} catch (\Exception $e) {
			return new NotFoundJSONResponse();
		}
		if ($credential instanceof Credential) {
			$result = $this->credentialService->deleteCredential($credential);
			//print_r($credential);
			$this->deleteCredentialParts($credential);
		} else {
			$result = false;
		}
		return new JSONResponse($result);
	}

	/**
	 * Delete leftovers from a credential
	 * @param Credential $credential
	 */
	private function deleteCredentialParts(Credential $credential) {
		$this->activityService->add(
			'item_destroyed_self', array($credential->getLabel()),
			'', array(),
			'', $this->userId, Activity::TYPE_ITEM_ACTION);
		$this->sharingService->unshareCredential($credential->getGuid());
		foreach ($this->credentialRevisionService->getRevisions($credential->getId()) as $revision) {
				$id = $revision->getId();
				if(isset($id)){
					$this->credentialRevisionService->deleteRevision($id, $this->userId);
				}
		}
	}

	/**
	 * @NoAdminRequired
	 * @NoCSRFRequired
	 */
	public function getRevision($credential_guid) {
		try {
			$credential = $this->credentialService->getCredentialByGUID($credential_guid);
		} catch (\Exception $ex) {
			return new NotFoundJSONResponse();
		}
		// If the request was made by the owner of the credential
		if ($this->userId === $credential->getUserId()) {
			$result = $this->credentialRevisionService->getRevisions($credential->getId(), $this->userId);
		} else {
			$acl = $this->sharingService->getACL($this->userId, $credential_guid);
			if ($acl->hasPermission(SharingACL::HISTORY)) {
				$result = $this->credentialRevisionService->getRevisions($credential->getId());
			} else {
				return new NotFoundJSONResponse();
			}
		}

		return new JSONResponse($result);
	}

	/**
	 * @NoAdminRequired
	 * @NoCSRFRequired
	 */
	public function deleteRevision($credential_id, $revision_id) {
		$result = $this->credentialRevisionService->deleteRevision($revision_id, $this->userId);
		return new JSONResponse($result);
	}

	/**
	 * @NoAdminRequired
	 * @NoCSRFRequired
	 */
	public function updateRevision($credential_guid, $revision_id, $credential_data) {
		$revision = null;
		try {
			$this->credentialService->getCredentialByGUID($credential_guid, $this->userId);
		} catch (\Exception $e) {
			return new NotFoundJSONResponse();
		}

		try {
			$revision = $this->credentialRevisionService->getRevision($revision_id);
		} catch (\Exception $exception) {
			return new NotFoundJSONResponse();
		}

		$revision->setCredentialData($credential_data);

		$this->credentialRevisionService->updateRevision($revision);
		return new JSONResponse(array());
	}
}