platform-ios/RainbowPlanet/RainbowPlanet/Modules/CommunityModule/CommunityVideoContent/ViewController/CommunityVideoListController.swift

//
//  CommunityVideoListController.swift
//  RainbowPlanet
//
//  Created by Christopher on 2019/7/3.
//  Copyright © 2019 RainbowPlanet. All rights reserved.
//  推荐--视频内容详情

import UIKit
import RxSwift
import Kingfisher
public enum DepartureVCType{
    case personal   // 个人中心
    case hotVideos  // 热门视频
    case others
}

class CommunityVideoListController: BaseViewController {
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        KingfisherManager.shared.cache.clearDiskCache()
        KingfisherManager.shared.cache.clearMemoryCache()
    }
    
    // 内容Id
    var contentId: Int?
    // 来源Vc
    var departureVc : DepartureVCType? {
        didSet {
            if departureVc == .personal {
                paraType = "one"
            } else if departureVc == .hotVideos {
                paraType = "hot"
            }
        }
    }
    var paraType: String?
    // 单个话题id
    var topicId: Int?
    
    var videoItemList : Array<CommunityVideoItemModel>?
    
    var commentAlertSheetView : CommunityAllCommentView?
    
    private var prePlayCell: CommunityVideoCoverCollectionCell?
    
    
    deinit {
        if observe != nil {
            NotificationCenter.default.removeObserver(observe!)
        }
    }
    weak var observe : NSObjectProtocol?
    
    override var prefersStatusBarHidden: Bool {
        return true
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        setupViews()
        setupData()
        setUpAppStatusNotification()
        statusBarStyle = .lightContent
    }
    
    override func viewWillAppear(_ animated: Bool) {
        UIApplication.shared.isIdleTimerDisabled = true
    }
    
    override func viewDidAppear(_ animated: Bool) {
        playFirstVideoWhenViewDidAppeared()
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        pauseWillDisappear()
        UIApplication.shared.isIdleTimerDisabled = false
    }
    
    func setUpAppStatusNotification() {
        observe = NotificationCenter.default.addObserver(forName: UIApplication.willResignActiveNotification, object: nil, queue: OperationQueue.main, using: {
            [weak self] (notification) in
            self?.pauseCurrentVideo()
        })
        
        observe = NotificationCenter.default.addObserver(forName: UIApplication.willEnterForegroundNotification, object: nil, queue: OperationQueue.main, using: {
            [weak self] (notification) in
            if self?.isViewLoaded ?? true && (self?.view.window) != nil {
                self?.startPlay(self?.prePlayCell)
            }
        })
        
        observe = NotificationCenter.default.addObserver(forName: UIApplication.didBecomeActiveNotification, object: nil, queue: OperationQueue.main, using: {
            [weak self] (notification) in
            if self?.isViewLoaded ?? true && (self?.view.window) != nil {
                self?.startPlay(self?.prePlayCell)
            }
        })
        
        // 子评论页面
        observe = NotificationCenter.default.addObserver(forName: NSNotification.Name("JumpToSubCommentController"), object: nil, queue: OperationQueue.main) {
            [weak self] (notification) in
            let paraDic = notification.object as! [String:Any]
            
            let vc = CommunityVideoSubCommentController()
            vc.communityPostCommentModel = paraDic["commmentModel"] as? CommunityPostCommentModel
            vc.communityVideoItemModel = paraDic["detailModel"] as? CommunityVideoItemModel
            self?.navigationController?.pushViewController(vc, animated: true)
            
            self?.commentAlertSheetView?.hide()
        }
    }
    
    override func setupViews() {
        navigationBar.isHidden = true
        view.backgroundColor = UIColor.black
        self.view.addSubview(collectionView)
        view.addSubview(blurEffectView)
        view.addSubview(placeLabel)
        view.addSubview(navBackBtn)

        collectionView.snp.makeConstraints { (make) in
            make.left.top.right.bottom.equalToSuperview()
        }
        navBackBtn.snp.makeConstraints { (make) in
            make.left.equalTo(5)
            make.top.equalTo(kSafeStatusBarHeight+2)
            make.size.equalTo(40)
        }
        placeLabel.snp.makeConstraints { (make) in
            make.center.equalToSuperview()
            make.width.equalTo(120)
            make.height.equalTo(60)
        }
        
        // 个人中心页进入，不可滑动
        if departureVc == .personal {
            collectionView.isScrollEnabled = false
        }
        
    }
    
    override func setupData() {
        navBackBtn.rx.tap.subscribe(onNext: {
            [weak self] (data) in
            self?.navigationController?.popViewController(animated: true)
        }).disposed(by: disposeBag)
        collectionView.addHeader(withBeginRefresh: true,  animation: false) {
            [weak self] (page) in
            self?.communityVideoListApi(page:page)
            self?.collectionView.mj_header?.isHidden = true
        }
        collectionView.addPreloadingAutoNormalFooter(withAutomaticallyRefresh: true) {
            [weak self] (page) in
            self?.communityVideoListApi(page:page)
        }
    }
    
    private lazy var navBackBtn: UIButton = {
        let navBackBtn = UIButton(type: UIButton.ButtonType.custom)
        navBackBtn.setImage(kImage(name: "navbar_back_white"), for: UIControl.State.normal)
        navBackBtn.isHidden = true
        return navBackBtn
    }()
    
    private lazy var collectionView: UICollectionView = {
        [unowned self] in
        let collectionView = UICollectionView.init(frame: CGRect.zero, collectionViewLayout: collectionViewLayout)
        collectionView.backgroundColor = UIColor.black
        collectionView.delegate = self;
        collectionView.dataSource = self;
        collectionView.isPagingEnabled = true
        collectionView.showsVerticalScrollIndicator = false
        collectionView.showsHorizontalScrollIndicator = false
        return collectionView
    }()
    
    private lazy var collectionViewLayout: UICollectionViewFlowLayout = {
        let collectionViewLayout = UICollectionViewFlowLayout.init()
        collectionViewLayout.minimumLineSpacing = 0
        collectionViewLayout.minimumInteritemSpacing = 0
        return collectionViewLayout
    }()
    
    private lazy var placeLabel: UILabel = {
        let placeLabel = UILabel()
        placeLabel.text = "视频不见了"
        placeLabel.textColor = UIColor.white
        placeLabel.textAlignment = .center
        placeLabel.cornerRadius = 8
        placeLabel.masksToBounds = true
        placeLabel.backgroundColor = UIColor(hexString: "000000", alpha: 0.5)
        placeLabel.font = kRegularFont15
        placeLabel.isHidden = true

        return placeLabel
    }()
    
    lazy var blurEffectView: UIVisualEffectView = {
        let blurEffect = UIBlurEffect(style: .dark)
        let blurEffectView = UIVisualEffectView(effect: blurEffect)
        blurEffectView.frame = CGRect(x: CGFloat(0), y: 0, width: kScreenWidth, height: kScreenHeight)
        blurEffectView.isHidden = true
        return blurEffectView
    }()
    
    
}

// MARK: - collectionView dataSource && delegate
extension CommunityVideoListController: UICollectionViewDelegateFlowLayout,UICollectionViewDataSource {
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return videoItemList?.count ?? 0
    }
    
    func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
        let cell = collectionView.cellForItem(at: indexPath) as? CommunityVideoCoverCollectionCell
        if cell != nil {
            collectionView.reloadItems(at: [indexPath])
        }
        
        // 记录阅读行为
        readVirueRecordAddApi(indexPath.row)
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = CommunityVideoCoverCollectionCell.cellWith(collectionView: collectionView, indexPath: indexPath)
        cell.videoItemMdl = videoItemList?[indexPath.row]
        cell.backClosure = {
            [weak self] in
            self?.navigationController?.popViewController(animated: true)
        }
        cell.shareClosure = {
            [weak self] (videoItemMdl) in
            self?.share(videoItemMdl,row:indexPath.row)
        }
        cell.followClosure = {
            [weak self] (videoItemMdl, followButton) in
            CommunityFollowUserViewModel.shared.follow(communityVideoItemModel: videoItemMdl,videoItemList:(self?.videoItemList)!, button: followButton)
        }
        cell.buttonClickClosure = {
            [weak self] (clickType, uid, postId,isShow) in
            switch clickType {
            case videoBtnClickType.typeComment:
                self?.showCommentView(postId: postId, videoItemMdl: (self?.videoItemList?[indexPath.row])!, isShow: isShow)
                
            case videoBtnClickType.typeLike:
                VirusViewModel.shared.praise(communityVideoItemModel: (self?.videoItemList?[indexPath.row])!)
                
            case videoBtnClickType.typeCollect:
                VirusViewModel.shared.collection(communityVideoItemModel: (self?.videoItemList?[indexPath.row])!)
                
            case videoBtnClickType.typePerson:
                
                if uid != UserModel.shared().getModel()?.uid {
                    let vc = OtherPersonalCenterViewController()
                    vc.uid = uid
                    self?.navigationController?.pushViewController(vc, animated: true)
                }
                
            }
        }
        return cell
    }
    
//    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
//        let cell = collectionView.cellForItem(at: indexPath) as? CommunityVideoCoverCollectionCell
//        if cell != nil {
//            if (cell?.videoPlayView.pauseFlag)! {
//                cell?.play()
//            } else {
//                cell?.pause()
//            }
//        }
//    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width:kScreenWidth, height:kScreenHeight)
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
        return UIEdgeInsets(top:0, left: 0, bottom: 0, right: 0)
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForFooterInSection section: Int) -> CGSize {
        return CGSize(width: kScreenWidth, height: 0)
    }
    
    func collectionView(_ collectionView: UICollectionView, didEndDisplaying cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {        
        // 上一个collectionItem滑出，停止播放上面的视频
        let preCell = cell as? CommunityVideoCoverCollectionCell
        preCell?.pause()
        preCell?.playStatusImageView.isHidden = true
    }
    
    func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
        // 滑动完毕，播放当前cell的video
        let index = Int(collectionView.contentOffset.y / CGFloat(kScreenHeight))
        let indexPath = IndexPath(item: index, section: 0)
        let cell = collectionView.cellForItem(at: indexPath) as? CommunityVideoCoverCollectionCell
        
        if(cell != nil) {
            self.startPlay(cell)
            self.prePlayCell = cell
        }
    }
    
}

// MARK: - Logic
extension CommunityVideoListController {
    
    func startPlay(_ cell: CommunityVideoCoverCollectionCell?) {
        cell?.play()
    }
    
    func pauseCurrentVideo() {
        if prePlayCell != nil {
            prePlayCell?.pause()
        }
    }
    
    func pauseWillDisappear() {
        if prePlayCell != nil {
            prePlayCell?.pauseWillDisappear()
        }
    }
    
    func playFirstVideoWhenViewDidAppeared() {
        DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double(Int64(0.4 * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC)) { () -> Void in
            let showCells = self.collectionView.visibleCells
            for tmpCell in showCells {
                let videoCell = tmpCell as? CommunityVideoCoverCollectionCell
                self.startPlay(videoCell)
                self.prePlayCell = videoCell
                break
            }
        }
    }
    
    func showCommentView(postId: Int, videoItemMdl: CommunityVideoItemModel,isShow:Bool) {
        commentAlertSheetView = CommunityAllCommentView.communityAllCommentView(view:self.view,postId: postId, videoItemMdl: videoItemMdl,isShow:isShow)
    }
    
    /// 分享
    func share(_ videoItemModel: CommunityVideoItemModel,row:Int) {
        var title = videoItemModel.title
        if title == nil || title == "" {
            title = videoItemModel.content
        }
        let shareCommunityView =  ShareCommunityView.shareCommunityView(
            postId: videoItemModel.id ?? 0, uid: videoItemModel.uid ?? 0,
            h5Str: (videoItemModel.h5url ?? "" + "\(UserModel.shared().getModel()?.inviteCode ?? "")"),
            thumbnailImg: UIImage.imageUrl(videoItemModel.img),
            sharedTitle: String(title ?? ""),
            sharedDetailTitle: kCommunityPostShareDetailTitle,
            shareCommunityViewType: ShareCommunityViewType.postDetail,
            completion: {
                VirusViewModel.shared.forwarVirueRecordAddApi(postId: videoItemModel.id, postAuthorUid: "\(videoItemModel.uid ?? 0)", title: videoItemModel.title, content: videoItemModel.content, postType: videoItemModel.type, postCover: videoItemModel.img)
        })
        shareCommunityView.saveCompletion = {
            [weak self] in
            let vc = CommunityShareContentViewController()
            vc.imgUrl = videoItemModel.img
            let communityPostDetailTopicModel = videoItemModel.topic?[0]
            vc.topicStr = communityPostDetailTopicModel?.name ?? ""
            if videoItemModel.title == "" || videoItemModel.title == nil {
                vc.titleStr =
                    String(videoItemModel.content?.prefix(20) ?? "")
            }else {
                vc.titleStr = String(videoItemModel.title?.prefix(20) ?? "")

            }
            vc.avatarStr = videoItemModel.avatar
            vc.nameStr = videoItemModel.username
            vc.H5UrlStr = (videoItemModel.h5url ?? "" + "\(UserModel.shared().getModel()?.inviteCode ?? "")")
            vc.bean = videoItemModel.willCollectBean
            vc.postId = videoItemModel.id
            vc.uid = videoItemModel.uid
            vc.type = videoItemModel.type
            vc.contentStr = videoItemModel.content
            self?.navigationController?.pushViewController(vc, animated: true)
        }
        
        shareCommunityView.deleteCompletion = {
            [weak self] in
            self?.communityDeleteApi(postId: videoItemModel.id ?? 0,row:row)
        }
    }
    
}

// MARK: - Networking
extension CommunityVideoListController {
    /// 视频列表
    func communityVideoListApi(page:Int = 1) {
        
        SwiftMoyaNetWorkServiceCommunity.shared().communityVideoListApi(id: contentId ?? 0, type: paraType ?? "", topicId: topicId ?? 0, page: page, completion: {
            [weak self] (communityVideoListModel) -> (Void) in
            let videoListMdl = communityVideoListModel as? CommunityVideoListModel
            if videoListMdl?.pagination?.currentPage == 1{
                self?.videoItemList?.removeAll()
                self?.collectionView.resetNoMoreData()
            }
            if self?.videoItemList?.isEmpty ?? true {
                self?.videoItemList = videoListMdl?.data
            }else {
                self?.videoItemList = (self?.videoItemList)! + (videoListMdl?.data)!
            }
            if self?.videoItemList?.isEmpty ?? true {
                self?.navBackBtn.isHidden = false
                self?.blurEffectView.isHidden = false
                self?.placeLabel.isHidden = false
            }else {
                self?.navBackBtn.isHidden = true
                self?.blurEffectView.isHidden = true
                self?.placeLabel.isHidden = true
            }
            self?.collectionView.reloadData()
            MJRefreshManager.mjRefreshManagerHiddenFooter(collectionView: self?.collectionView, pagination: videoListMdl?.pagination)
        }) { [weak self] loadingStatus in
            self?.navBackBtn.isHidden = false
            self?.blurEffectView.isHidden = false
            self?.placeLabel.isHidden = false
        }
    }
    
    /// 阅读virue
    func readVirueRecordAddApi(_ indexRow: Int) {
        let videoItemMdl = self.videoItemList?[indexRow]
        
        var postDesc : String?
        if videoItemMdl?.title == nil ||  videoItemMdl?.title == "" {
            postDesc = "\(videoItemMdl?.content?.prefix(20) ?? "")"
        }else {
            postDesc = videoItemMdl?.title
        }
        
        VirusViewModel.shared.readVirueRecordAddApi(postId: videoItemMdl?.id, postAuthorUid: "\(videoItemMdl?.uid ?? 0)", postDesc: postDesc, postType: videoItemMdl?.type, postCover: videoItemMdl?.img, actionId: "\(videoItemMdl?.id ?? 0)")
    }
    
    /// 删除帖子
    func communityDeleteApi(postId:Int,row:Int) {
        SwiftMoyaNetWorkServiceCommunity.shared().communityDeleteApi(postId: postId) { [weak self] (data) -> (Void) in
            self?.navigationController?.popViewController(animated: true)
        }
    }
}