Music_Player3/MusicPlayer/MP/Views/Home(音乐资源列表-播放器)/Home_RowListsTableViewCell.swift

//
//  Home_RowListsTableViewCell.swift
//  MusicPlayer
//
//  Created by Mr.Zhou on 2024/3/27.
//

import UIKit
//HomeTableViewcell展示类型
enum HomeRowCellLayout: Int {
    case Zero = 0
    case First = 1
    case Second = 2
    case Third = 3
    //collectionView的高度
    var height:CGFloat{
        switch self {
        case .Zero:
            return 140*width
        case .First:
            return 163*width
        case .Second:
            return 163*width
        case .Third:
            return 215*width
        }
    }
    //collecitonViewCell的Size
    var size:CGSize{
        switch self {
        case .Zero:
            return .init(width: 166*width, height: 140*width)
        case .First:
            return .init(width: 108*width, height: 118*width)
        case .Second:
            return .init(width: 108*width, height: 118*width)
        case .Third:
            return .init(width: 340*width, height: 54*width)
        }
    }
    //collectionViewCell的外边距
    var edgeInsets:UIEdgeInsets{
        switch self {
        case .Zero:
            return .init(top: 0, left: 16*width, bottom: 0, right: 16*width)
        case .First:
            return .init(top: 0, left: 16*width, bottom: 45*width, right: 16*width)
        case .Second:
            return .init(top: 0, left: 16*width, bottom: 45*width, right: 16*width)
        case .Third:
            return .init(top: 0, left: 16*width, bottom: 17*width, right: 16*width)
        }
    }
    //collectionViewCell的组距
    var columnDistance:CGFloat{
        return 17*width
    }
    //collectionViewCell的列距
    var rowDistance:CGFloat{
        return 8*width
    }
}
class Home_RowListsTableViewCell: UITableViewCell {
    @IBOutlet weak var collectionView: UICollectionView!{
        didSet{
            collectionView.contentInsetAdjustmentBehavior = .never
            collectionView.dataSource = self
            collectionView.delegate = self
            collectionView.register(UINib(nibName: Home_FirstListCollectionViewCellID, bundle: nil), forCellWithReuseIdentifier: Home_FirstListCollectionViewCellID)
            collectionView.register(UINib(nibName: Home_SecondListCollectionViewCellID, bundle: nil), forCellWithReuseIdentifier: Home_SecondListCollectionViewCellID)
            collectionView.register(UINib(nibName: Home_FourthListCollectionViewCellID, bundle: nil), forCellWithReuseIdentifier: Home_FourthListCollectionViewCellID)
        }
    }
    @IBOutlet weak var heightConstraint: NSLayoutConstraint!
    var layout:HomeRowCellLayout = .Zero {
        didSet{
            heightConstraint.constant = layout.height
            collectionView.reloadData()
        }
    }
    fileprivate let Home_FirstListCollectionViewCellID = "Home_FirstListCollectionViewCell"
    fileprivate let Home_SecondListCollectionViewCellID = "Home_SecondListCollectionViewCell"
    fileprivate let Home_FourthListCollectionViewCellID = "Home_FourthListCollectionViewCell"
    override func awakeFromNib() {
        super.awakeFromNib()
        selectionStyle = .none
        //添加通知
        NotificationCenter.notificationKey.add(observer: self, selector: #selector(switchPlayerStateAction(_ :)), notificationName: .play_music)
        NotificationCenter.notificationKey.add(observer: self, selector: #selector(switchPlayerStateAction(_ :)), notificationName: .stop_music)
        NotificationCenter.notificationKey.add(observer: self, selector: #selector(switchPlayerStateAction(_ :)), notificationName: .resume_music)
        NotificationCenter.notificationKey.add(observer: self, selector: #selector(switchPlayerStateAction(_ :)), notificationName: .pause_music)
    }
    deinit{
        //移除所有通知
        NotificationCenter.default.removeObserver(self)
    }
    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }
    //当音乐播放器状态改变时
    @objc private func switchPlayerStateAction(_ sender:Notification) {
        //回归主线程
        DispatchQueue.main.async {
            [weak self] in
            //刷新页面内容
            self?.collectionView.reloadData()
        }
    }
}
//MARK: - collectionView处理
extension Home_RowListsTableViewCell:UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return layout != .Third ? 1:3
    }
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        switch layout {
        case .Zero:
            return LoadDataMusic.shared.homeZeroMusics.count
        case .First:
            return LoadDataMusic.shared.homeFirstMusics.count
        case .Second:
            return LoadDataMusic.shared.homeSecondMusics.count
        default:
            return LoadDataMusic.shared.homeThirdMusics[section].count
        }
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        switch layout {
        case .Zero:
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: Home_FirstListCollectionViewCellID, for: indexPath) as! Home_FirstListCollectionViewCell
            cell.musicView = LoadDataMusic.shared.homeZeroMusics[indexPath.row]
            return cell
        case .First:
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: Home_SecondListCollectionViewCellID, for: indexPath) as! Home_SecondListCollectionViewCell
            cell.musicView = LoadDataMusic.shared.homeFirstMusics[indexPath.row]
            return cell
        case .Second:
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: Home_SecondListCollectionViewCellID, for: indexPath) as! Home_SecondListCollectionViewCell
            cell.musicView = LoadDataMusic.shared.homeSecondMusics[indexPath.row]
            return cell
        default:
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: Home_FourthListCollectionViewCellID, for: indexPath) as! Home_FourthListCollectionViewCell
            cell.musicView = LoadDataMusic.shared.homeThirdMusics[indexPath.section][indexPath.row]
            return cell
        }
    }
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return layout.size
    }
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
        return layout.edgeInsets
    }
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        return layout.rowDistance
    }
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
        return layout.columnDistance
    }
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        var music:MusicModel!
        switch layout {
        case .Zero:
            //获取一首音乐
            music = LoadDataMusic.shared.homeZeroMusics[indexPath.row].music
        case .First:
            music = LoadDataMusic.shared.homeFirstMusics[indexPath.row].music
        case .Second:
            music = LoadDataMusic.shared.homeSecondMusics[indexPath.row].music
        default:
            music = LoadDataMusic.shared.homeThirdMusics[indexPath.section][indexPath.row].music
        }
        //检索当前音乐状态
        guard MPMediaCenterManager.shared.getMusic()?.identifier != music.identifier else {
            //同一首，检索是否播放中
            switch MPMediaCenterManager.shared.getPlayerState() {
            case .Null://没有播放
                MPMediaCenterManager.shared.playerStart(music, actionType: .Normal)
            case .Playing://播放中
                break
            case .Pause://继续播放
                MPMediaCenterManager.shared.playerResume()
            }
            return
        }
        //新的一首
        MPMediaCenterManager.shared.playerStart(music, actionType: .Normal)
    }
}