//
//  NCActivityCollectionViewCell.swift
//  Nextcloud
//
//  Created by Henrik Storch on 17/01/2019.
//  Copyright © 2021. All rights reserved.
//
//  Author Henrik Storch <henrik.storch@nextcloud.com>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU 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 General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

import Foundation
import NextcloudKit
import FloatingPanel
import JGProgressHUD
import Queuer

class NCActivityCollectionViewCell: UICollectionViewCell {

    @IBOutlet weak var imageView: UIImageView!

    var fileId = ""
    var indexPath = IndexPath()

    override func awakeFromNib() {
        super.awakeFromNib()
    }
}

class NCActivityTableViewCell: UITableViewCell, NCCellProtocol {

    @IBOutlet weak var collectionView: UICollectionView!
    @IBOutlet weak var icon: UIImageView!
    @IBOutlet weak var avatar: UIImageView!
    @IBOutlet weak var subject: UILabel!
    @IBOutlet weak var subjectTrailingConstraint: NSLayoutConstraint!
    @IBOutlet weak var collectionViewHeightConstraint: NSLayoutConstraint!

    private let appDelegate = (UIApplication.shared.delegate as? AppDelegate)!
    private var user: String = ""
    private var index = IndexPath()

    var idActivity: Int = 0
    var activityPreviews: [tableActivityPreview] = []
    var didSelectItemEnable: Bool = true
    var viewController = UIViewController()
    let utility = NCUtility()

    var indexPath: IndexPath {
        get { return index }
        set { index = newValue }
    }
    var fileAvatarImageView: UIImageView? {
        return avatar
    }
    var fileUser: String? {
        get { return user }
        set { user = newValue ?? "" }
    }

    override func awakeFromNib() {
        super.awakeFromNib()

        collectionView.delegate = self
        collectionView.dataSource = self
        let avatarRecognizer = UITapGestureRecognizer(target: self, action: #selector(tapAvatarImage))
        avatar.addGestureRecognizer(avatarRecognizer)
    }

    @objc func tapAvatarImage() {
        guard let fileUser = fileUser else { return }
        viewController.showProfileMenu(userId: fileUser)
    }
}

// MARK: - Collection View

extension NCActivityTableViewCell: UICollectionViewDelegate {

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

        // Select not permitted
        if !didSelectItemEnable {
            return
        }

        let activityPreview = activityPreviews[indexPath.row]

        if activityPreview.view == "trashbin" {

            var responder: UIResponder? = collectionView
            while !(responder is UIViewController) {
                responder = responder?.next
                if responder == nil {
                    break
                }
            }
            if (responder as? UIViewController)!.navigationController != nil {
                if let viewController = UIStoryboard(name: "NCTrash", bundle: nil).instantiateInitialViewController() as? NCTrash {
                    if let result = NCManageDatabase.shared.getTrashItem(fileId: String(activityPreview.fileId), account: activityPreview.account) {
                        viewController.blinkFileId = result.fileId
                        viewController.filePath = result.filePath
                        (responder as? UIViewController)!.navigationController?.pushViewController(viewController, animated: true)
                    } else {
                        let error = NKError(errorCode: NCGlobal.shared.errorInternalError, errorDescription: "_trash_file_not_found_")
                        NCContentPresenter().showError(error: error)
                    }
                }
            }

            return
        }

        if activityPreview.view == NCGlobal.shared.appName && activityPreview.mimeType != "dir" {

            guard let activitySubjectRich = NCManageDatabase.shared.getActivitySubjectRich(account: activityPreview.account, idActivity: activityPreview.idActivity, id: String(activityPreview.fileId)) else {
                return
            }

            NCActionCenter.shared.viewerFile(account: appDelegate.account, fileId: activitySubjectRich.id, viewController: viewController)
        }
    }
}

extension NCActivityTableViewCell: UICollectionViewDataSource {

    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        let results = activityPreviews.unique { $0.fileId }
        return results.count
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        guard let cell: NCActivityCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionCell", for: indexPath) as? NCActivityCollectionViewCell else {
            return UICollectionViewCell()
        }

        cell.imageView.image = nil
        cell.indexPath = indexPath

        let activityPreview = activityPreviews[indexPath.row]
        let fileId = String(activityPreview.fileId)

        // Trashbin
        if activityPreview.view == "trashbin" {

            let source = activityPreview.source

            utility.convertSVGtoPNGWriteToUserData(svgUrlString: source, width: 100, rewrite: false, account: appDelegate.account, id: idActivity) { imageNamePath, id in
                if let imageNamePath = imageNamePath, id == self.idActivity, let image = UIImage(contentsOfFile: imageNamePath) {
                    cell.imageView.image = image
                } else {
                    cell.imageView.image = UIImage(named: "file")
                }
            }

        } else {

            if activityPreview.isMimeTypeIcon {

                let source = activityPreview.source

                utility.convertSVGtoPNGWriteToUserData(svgUrlString: source, width: 100, rewrite: false, account: appDelegate.account, id: idActivity) { imageNamePath, id in
                    if let imageNamePath = imageNamePath, id == self.idActivity, let image = UIImage(contentsOfFile: imageNamePath) {
                        cell.imageView.image = image
                    } else {
                        cell.imageView.image = UIImage(named: "file")
                    }
                }

            } else {

                if let activitySubjectRich = NCManageDatabase.shared.getActivitySubjectRich(account: activityPreview.account, idActivity: idActivity, id: fileId) {

                    let fileNamePath = NCUtilityFileSystem().directoryUserData + "/" + activitySubjectRich.name

                    if FileManager.default.fileExists(atPath: fileNamePath), let image = UIImage(contentsOfFile: fileNamePath) {
                        cell.imageView.image = image
                    } else {
                        cell.imageView?.image = UIImage(named: "file_photo")
                        cell.fileId = fileId
                        if !FileManager.default.fileExists(atPath: fileNamePath) {
                            if NCNetworking.shared.downloadThumbnailActivityQueue.operations.filter({ ($0 as? NCOperationDownloadThumbnailActivity)?.fileId == fileId }).isEmpty {
                                NCNetworking.shared.downloadThumbnailActivityQueue.addOperation(NCOperationDownloadThumbnailActivity(fileNamePathOrFileId: activityPreview.source, fileNamePreviewLocalPath: fileNamePath, fileId: fileId, cell: cell, collectionView: collectionView))
                            }
                        }
                    }
                }
            }
        }

        return cell
    }

}

extension NCActivityTableViewCell: UICollectionViewDelegateFlowLayout {

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: 50, height: 50)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        return 20
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
        return UIEdgeInsets(top: 0, left: 0, bottom: 10, right: 0)
    }
}

class NCOperationDownloadThumbnailActivity: ConcurrentOperation {

    var cell: NCActivityCollectionViewCell?
    var collectionView: UICollectionView?
    var fileNamePathOrFileId: String
    var fileNamePreviewLocalPath: String
    var fileId: String

    init(fileNamePathOrFileId: String, fileNamePreviewLocalPath: String, fileId: String, cell: NCActivityCollectionViewCell?, collectionView: UICollectionView?) {
        self.fileNamePathOrFileId = fileNamePathOrFileId
        self.fileNamePreviewLocalPath = fileNamePreviewLocalPath
        self.fileId = fileId
        self.cell = cell
        self.collectionView = collectionView
    }

    override func start() {

        guard !isCancelled else { return self.finish() }

        NextcloudKit.shared.downloadPreview(fileNamePathOrFileId: fileNamePathOrFileId,
                                            fileNamePreviewLocalPath: fileNamePreviewLocalPath,
                                            widthPreview: 0,
                                            heightPreview: 0,
                                            etag: nil,
                                            useInternalEndpoint: false,
                                            options: NKRequestOptions(queue: NextcloudKit.shared.nkCommonInstance.backgroundQueue)) { _, imagePreview, _, _, _, error in

            if error == .success, let imagePreview = imagePreview {
                DispatchQueue.main.async {
                    if self.fileId == self.cell?.fileId, let imageView = self.cell?.imageView {
                        UIView.transition(with: imageView,
                                          duration: 0.75,
                                          options: .transitionCrossDissolve,
                                          animations: { imageView.image = imagePreview },
                                          completion: nil)
                    } else {
                        self.collectionView?.reloadData()
                    }
                }
            }
            self.finish()
        }
    }
}