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

class CommunityVideoListController: BaseViewController {
    
    // 内容Id
    var contentId: Int? {
        didSet {
            setupData()
        }
    }
    
    var videoItemList: Array<CommunityVideoItemModel>?
    
    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()
        setUpAppStatusNotification()
    }
    
    override func viewDidAppear(_ animated: Bool) {
        playFirstVideoWhenViewDidAppeared()
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        pauseCurrentVideo()
    }
    
    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
            self?.startPlay(self?.prePlayCell)
        })
        
        observe = NotificationCenter.default.addObserver(forName: UIApplication.didBecomeActiveNotification, object: nil, queue: OperationQueue.main, using: {
            [weak self] (notification) in
            self?.startPlay(self?.prePlayCell)
        })
    }
    
    override func setupViews() {        
        
        self.view.addSubview(collectionView)
        let emptyView = DIYEmptyView.empty(with: kImage(name: "default_page_data"), titleStr: nil, detailStr: "当前暂无数据")
        emptyView!.contentViewY = kScaleValue(value: 182)
        collectionView.ly_emptyView = emptyView
        collectionView.ly_startLoading()
        collectionView.snp.makeConstraints { (make) in
            make.top.equalTo(0)
            make.left.right.bottom.equalToSuperview()
        }
        
    }
    
    override func setupData() {
        collectionView.addHeaderWithHeader(withBeginRefresh: true, animation: false) { [weak self] (page) in
            self?.communityVideoListApi()
        }
    }
    
    /// 视频列表
    func communityVideoListApi() {
        SwiftMoyaNetWorkServiceCommunity.shared().communityVideoListApi(id: contentId ?? 0) {
            [weak self] (communityVideoListModel) -> (Void) in
            let videoListMdl = communityVideoListModel as? CommunityVideoListModel
            self?.videoItemList = videoListMdl?.data
            self?.collectionView.reloadData()
        }
    }
    
    private lazy var collectionView: UICollectionView = {
        let collectionView = UICollectionView.init(frame: CGRect.zero, collectionViewLayout: collectionViewLayout)
        collectionView.backgroundColor = kf7f8faColor
        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
    }()
    
}

// 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, 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] in
            print("------点击了[分享]")
        }
        cell.followClosure = { (videoItemMdl, followButton) in
            CommunityFollowUserViewModel.shared.follow(communityVideoItemModel: videoItemMdl, button: followButton)
        }
        cell.buttonClickClosure = {
            [weak self] (clickType, uid, postId) in
            switch clickType {
            case videoBtnClickType.typeComment:
                self?.showCommentView(postId: postId)
                
            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:
                let vc = OtherPersonalCenterViewController()
                vc.uid = uid
                self?.navigationController?.pushViewController(vc, animated: true)
                
            default:
                break
            }
        }
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        print("----collectionClicked -- \(indexPath.row)")
    }
    
    
    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: 10)
    }
    
    func collectionView(_ collectionView: UICollectionView, didEndDisplaying cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
        prePlayCell = cell as? CommunityVideoCoverCollectionCell
        self.pauseCurrentVideo()
    }
    
    func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
        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)
        }
    }
    
}

// MARK: -
extension CommunityVideoListController {
    
    func startPlay(_ cell: CommunityVideoCoverCollectionCell?) {
        cell?.play()
    }
    
    func pauseCurrentVideo() {
        if prePlayCell != nil {
            prePlayCell?.pause()
        }
    }
    
    func playFirstVideoWhenViewDidAppeared() {
        let showCells = collectionView.visibleCells
        for tmpCell in showCells {
            let videoCell = tmpCell as? CommunityVideoCoverCollectionCell
            startPlay(videoCell)
            prePlayCell = videoCell
            break
        }
    }
    
    func showCommentView(postId: Int) {
        
        AlertSheetView.commentAlertSheetView(postId: postId, cancelClosure: {
            [weak self] in
            
        }) {
            [weak self] (payType) in
            print("----\(payType)")
        }
    }
    
}