BFRecordScreenKit/BFRecordScreenKit/Classes/RecordScreen/View/BFChooseMusicView.swift

//
//  BFChooseMusicView.swift
//  BFRecordScreenKit
//
//  Created by 胡志强 on 2022/2/28.
//

import Foundation
import UIKit
import BFUIKit
import BFMediaKit
import BFCommonKit
import BFNetRequestKit


enum BFChooseMusicViewClickType {
    case sure, cancle, search
}


class BFChooseMusicView: UIView {
    
    var clickBtnAction: ((BFChooseMusicViewClickType) -> Void)?
    var cutActionCallback: ((PQVoiceModel) -> Void)?

    // 各类别音乐列表，以类别id为key
    var musicDic = [Int64 : [PQVoiceModel]]()
    
    var searchModel : PQVoiceModel?{
        willSet{
            if searchModel != nil {
                if let catogory = categories.first(where: { mod in
                    mod.tagName == "热门"
                }){
                    if let tid = catogory.tagId, let _ = musicDic[tid] {
                        // 找到热门的数组
                        musicDic[tid]?.removeFirst()
                    }
                }
            }
        }
        didSet {
            if let searchModel = searchModel {
                if let catogory = categories.first(where: { mod in
                    mod.tagName == "热门"
                }){
                    if let tid = catogory.tagId, let list = musicDic[tid] {
                        var arr = [PQVoiceModel]()
                        arr.append(searchModel)
                        if list.first?.musicId != searchModel.musicId {
                            arr.append(contentsOf: list)
                            musicDic[tid] = arr
                            searchModel.isSelected = true
                            chosedMusic?.isSelected = false
                            chosedMusic = searchModel
                            
                            musicTb.reloadData()
                        }
                    }
                }
            }
        }
    }
    // 选择的音乐类别
    var categorySelectIndex : Int = 1
    
    // 音乐类别
    var categories = [PQStuckPointMusicTagsModel]()
    
    var musicVolume = 0.0 {
        didSet{
            slidV.value = Float(musicVolume)
            uiForChangeVolume()
        }
    }
    
    // 选中的音乐
    var chosedMusic : PQVoiceModel?
    
    var chosedIndexPath : IndexPath?
    
    var chosedCellStatu : BFMuicInfoCellState = .pause
    
    var loadedTimeRangesObserver : NSKeyValueObservation?

    // 试听音乐
    let player:AVPlayer = {
        let p = AVPlayer(playerItem: nil)
        return p
    }()
    
    lazy var categoryView : UICollectionView = {
        let layout = BFCollectionViewFlowLayout()
        layout.dele = self
        layout.scrollDirection = .horizontal
        layout.minimumLineSpacing = 25
//        layout.sectionInset = UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 10)
        layout.minimumInteritemSpacing = 2
        let vv = UICollectionView(frame: CGRect(x: 60, y: 0, width: cScreenWidth - 60, height: 40), collectionViewLayout: layout)
        vv.isPagingEnabled = false
        vv.showsHorizontalScrollIndicator = false
        vv.showsVerticalScrollIndicator = false
        vv.register(BFMusicCategoryCell.self, forCellWithReuseIdentifier: "BFMusicCategoryCell")
        vv.backgroundColor = UIColor.clear

        vv.delegate = self
        vv.dataSource = self
        if #available(iOS 11.0, *) {
            vv.contentInsetAdjustmentBehavior = .never
        } else {
            // Fallback on earlier versions
        }
        vv.backgroundColor = .clear

        return vv
    }()
    
    lazy var progressL : UILabel = {
        let l = UILabel()
        l.textColor = UIColor.hexColor(hexadecimal: "#9d9d9d")
        l.font = UIFont.systemFont(ofSize: 13, weight: .regular)
        l.textAlignment = .center
        l.text = "0%"
        return l
    }()
    
    lazy var slidV : UISlider = {
        let v = UISlider()
        v.addTarget(self, action: #selector(valuChange(slid:)), for: .valueChanged)
        return v
    }()
    
    lazy var musicTb : UITableView = {
        let tb = UITableView(frame: .zero)
        tb.delegate = self
        tb.dataSource = self
        tb.separatorColor = UIColor.hexColor(hexadecimal: "#272727")
        tb.register(BFMuicInfoCell.self, forCellReuseIdentifier: "BFMuicInfoCell")
        tb.tableFooterView = UIView()
        tb.backgroundColor = .clear
        return tb
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        backgroundColor = UIColor.clear
        
        let dismisBtn = UIButton()
        dismisBtn.tag = 1004
        dismisBtn.frame = CGRect(x: 0, y: 0, width: width, height: 200)
        dismisBtn.addTarget(self, action: #selector(btnAction(btn:)), for: .touchUpInside)
        addSubview(dismisBtn)
        
        let backV = UIView()
        backV.backgroundColor = .black
        backV.isUserInteractionEnabled = true
        backV.layer.cornerRadius = 10
        backV.frame =  CGRect(x: 0, y: 200, width: cScreenWidth, height: cScreenHeigth - 190)
        addSubview(backV)
        
        let cancelBtn = UIButton()
        cancelBtn.tag = 1001
        cancelBtn.frame = CGRect(x: 18, y: 227, width: 35, height: 24)
        cancelBtn.setTitle("取消", for: .normal)
        cancelBtn.setTitleColor(UIColor.hexColor(hexadecimal: "#616161"), for: .normal)
        cancelBtn.titleLabel?.font = UIFont.systemFont(ofSize: 17, weight: .regular)
        cancelBtn.addTarget(self, action: #selector(btnAction(btn:)), for: .touchUpInside)
        addSubview(cancelBtn)
        
        let sureBtn = UIButton()
        sureBtn.tag = 1002
        sureBtn.frame = CGRect(x: width - 35 - 18, y: 227, width: 35, height: 24)
        sureBtn.setTitle("确定", for: .normal)
        sureBtn.setTitleColor(UIColor.hexColor(hexadecimal: "#389AFF"), for: .normal)
        sureBtn.titleLabel?.font = UIFont.systemFont(ofSize: 17, weight: .regular)
        sureBtn.addTarget(self, action: #selector(btnAction(btn:)), for: .touchUpInside)
        addSubview(sureBtn)
        
        let line1 = UIView()
        line1.backgroundColor = UIColor.hexColor(hexadecimal: "#272727")
        line1.frame = CGRect(x: 0, y: 260, width: width, height: 1)
        addSubview(line1)

        categoryView.frame = CGRect(x: 0, y: line1.bottomY, width: width - 50, height: 40)
        addSubview(categoryView)
        
        let searchBtn = UIButton()
        searchBtn.tag = 1003
        searchBtn.frame  = CGRect(x: categoryView.rightX+2, y: line1.bottomY, width: 40, height: 40)
        searchBtn.setImage(imageInRecordScreenKit(by: "search"), for: .normal)
        searchBtn.addTarget(self, action: #selector(btnAction(btn:)), for: .touchUpInside)
        addSubview(searchBtn)
        
        let line2 = UIView()
        line2.backgroundColor = UIColor.hexColor(hexadecimal: "#272727")
        line2.frame = CGRect(x: 0, y: categoryView.bottomY, width: width, height: 1)
        addSubview(line2)
        
        musicTb.frame = CGRect(x: 0, y: line2.bottomY, width: width, height: height - line2.bottomY - 100)
        addSubview(musicTb)
        
        let soundIV = UIImageView(image: imageInRecordScreenKit(by: "soundBtn"))
        soundIV.frame = CGRect(x: 16, y: musicTb.bottomY + 36, width: 28, height: 28)
        soundIV.contentMode = .scaleAspectFit
        addSubview(soundIV)
        
        slidV.frame = CGRect(x: soundIV.rightX + 20, y: soundIV.y+5, width: cScreenWidth - soundIV.rightX - 20 - 18, height: 18)
        addSubview(slidV)

        progressL.frame = CGRect(x: slidV.x - 7, y: slidV.y - 24, width: 36, height: 16)
        addSubview(progressL)
        
        self.musicVolume = 0.2
        
        NotificationCenter.default.addObserver(forName: .AVPlayerItemDidPlayToEndTime, object: player.currentItem, queue: .main) {[weak self] notice in
            guard let wself = self else { return }
            
            wself.choseCell()?.status = .pause
            wself.chosedCellStatu = .pause
        }

        loadedTimeRangesObserver = player.observe(\AVPlayer.currentItem?.loadedTimeRanges, options: [.new, .initial]) { [weak self] (player, change) in
            
            DispatchQueue.main.async {[weak self] in
                guard let wself = self else { return }
                
                guard let ranges = change.newValue as? [CMTimeRange] else { return }
                if let indx = wself.chosedIndexPath, let cell = wself.musicTb.cellForRow(at: indx) as? BFMuicInfoCell, let totalDur = player.currentItem?.duration, totalDur.isValid,  CMTimeCompare(ranges.first?.duration ?? .zero, totalDur) >= 0{
                    if (player.currentItem?.asset as? AVURLAsset)?.url.absoluteString ?? "b" == cell.data?.musicPath ?? "a" {
                        if cell.status != .playing{
                            cell.status = .playing
                            wself.chosedCellStatu = .playing
                        }
                    }
                }
                BFLog(1, message: "开始播放音乐:\(ranges.first?.start.seconds ?? 0), dur:\( ranges.first?.duration.seconds ?? 0), tot:\(player.currentItem?.duration.seconds ?? 0)")
            }
        }
        
        prepareData()
        
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    func prepareData() {
        BFNetRequestAdaptor.postRequestData(url: PQENVUtil.shared.longvideoapi + stuckPointMusicCategoryUrl, parames: ["parentTagId": 0], commonParams: commonParams(), isJsonEncodingNormal: true, timeoutInterval: 15) {[weak self] response, _, error, _ in
            guard let wself = self else { return }
            
            var tagsList = Array<PQStuckPointMusicTagsModel>.init()
            if response is NSNull || response == nil {
                cShowHUB(superView: nil, msg: "音乐分类获取失败")
                return
            }
            let tagsTempArr = response as? [[String: Any]]
            if tagsTempArr != nil, (tagsTempArr?.count ?? 0) > 0 {  
                for dict in tagsTempArr! {
                    let tempMusic = PQStuckPointMusicTagsModel(jsonDict: dict)
                    tempMusic.parentTagId = 0
                    tagsList.append(tempMusic)
                }
            }
            tagsList.first?.isSelected = true
            
            let tempMusic = PQStuckPointMusicTagsModel()
            tempMusic.tagId = -1
            tagsList.insert(tempMusic, at: 0)
            wself.categories.append(contentsOf: tagsList)
            wself.categoryView.reloadData()
            if wself.categories.count > 1 {
                wself.categorySelectIndex = 1
                if let firstTagid = wself.categories[1].tagId{
                    wself.getMusicsForCategory(tagId:firstTagid, pageNum: 1)
                }
            }
        }
    }
    
    func getMusicsForCategory(tagId:Int64, pageNum:Int64) {
        BFNetRequestAdaptor.postRequestData(url: PQENVUtil.shared.longvideoapi + stuckPointMusicPageUrl, parames: ["tagId": tagId, "parentTagId": 0, "pageNum": pageNum, "pageSize": 20], commonParams: commonParams()) {[weak self] response, _, error, _ in
            guard let wself = self else { return }
            
            var musicPageList = [PQVoiceModel]()
            if response is NSNull || response == nil {
                cShowHUB(superView: nil, msg: "该分类下无音乐")
                return
            }
            
            if wself.musicDic[tagId] == nil {
                wself.musicDic[tagId] = [PQVoiceModel]()
            }
            let oldDataMusic : [PQVoiceModel] = wself.musicDic[tagId]!
            
            if let tempArr = response as? [[String: Any]], tempArr.count > 0 {
                for (_, dict) in tempArr.enumerated() {
                    let tempMusic = PQVoiceModel(jsonDict: dict)
                    tempMusic.cacheTagID = tagId
                    if tempMusic.endTime <= tempMusic.startTime {
                        tempMusic.endTime = tempMusic.startTime + 40
                    }

                    let haveIndex = oldDataMusic.firstIndex(where: { (music) -> Bool in
                        music.musicId == tempMusic.musicId
                    })
                    if haveIndex == nil {
                        musicPageList.append(tempMusic)
                    }
                }
            }
            
            if musicPageList.count > 0 {
                wself.musicDic[tagId]!.append(contentsOf: musicPageList)
                if tagId == wself.categories[wself.categorySelectIndex].tagId{
                    wself.musicTb.reloadData()
                }
            }
            
        }
    }
    
    @objc func valuChange(slid:UISlider) {
        musicVolume = Double(slid.value)
    }
    
    func uiForChangeVolume() {
        let num = (Int)(musicVolume * 100)

        progressL.text = String(format: "%d%%", num)
        
        var frame = progressL.frame
        frame.origin.x = slidV.x - 7 + ((slidV.width - 28) / 100.0) * CGFloat(num)
        progressL.frame = frame
        
        player.volume = Float(musicVolume)
        chosedMusic?.volume = num

    }
    
    func configCategoriesView(){
        categoryView.reloadData()
    }
    
    func choseCell() -> BFMuicInfoCell? {
        if let indpx = chosedIndexPath, let cell = musicTb.cellForRow(at: indpx) as? BFMuicInfoCell {
            return cell
        }
        return nil
    }
    
    @objc func btnAction(btn:UIButton) {
        
        player.pause()
 
        choseCell()?.status = .pause
        
        switch btn.tag{
        case 1001:
            clickBtnAction?(.cancle)
        case 1002, 1004:
            clickBtnAction?(.sure)
        case 1003:
            clickBtnAction?(.search)
        default:break
        }
    }
    
    func reloadView() {
        
    }
    
    // 取消选歌
    func cancelChooseMusic() {
        chosedMusic = nil
        player.pause()
        choseCell()?.changeSelected(false)
    }

}

extension BFChooseMusicView:UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "BFMuicInfoCell", for: indexPath) as! BFMuicInfoCell
        cell.selectionStyle = .none
        cell.cutCallBack = {[weak self, weak cell] in
            guard let wself = self else { return }
            wself.player.pause()
            if let data = cell?.data {
                wself.cutActionCallback?(data)
            }
        }
        if let tagid = categories[categorySelectIndex].tagId, let arr = musicDic[tagid] {
            cell.data = arr[indexPath.row]
            if cell.data?.isSelected ?? false {
                chosedIndexPath = indexPath
                chosedMusic = cell.data
                cell.status = chosedCellStatu
            }else{
                cell.status = .normal
            }
        }
        
        return cell
    }
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 64
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if categories.count > 1 {
            return musicDic[categories[categorySelectIndex].tagId ?? 0]?.count ?? 0
        }
        return 0
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        if let cell = tableView.cellForRow(at: indexPath) as? BFMuicInfoCell {
            chosedMusic?.isSelected = false
            chosedMusic = cell.data
            chosedMusic?.isSelected = true
            cell.changeSelected(true)
            
            chosedIndexPath = indexPath
            
            if cell.status == .normal {
                if let urlStr = cell.data?.musicPath, let url = URL(string: urlStr){
                    BFLog(1, message: "歌曲地址: \(url)")
                    if url.absoluteString != (player.currentItem?.asset as? AVURLAsset)?.url.absoluteString ?? "b" {
                        player.replaceCurrentItem(with: AVPlayerItem(url: url))
                        cell.status = .loading
                    }else {
                        cell.status = .playing
                    }
                    player.play()
                }
            }else if cell.status == .pause{
                player.play()
            } else{
                player.pause()
                cell.status = .pause
            }
            chosedCellStatu = cell.status
        }
    }
    
    func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
        let cell = tableView.cellForRow(at: indexPath) as? BFMuicInfoCell
        cell?.status = .normal
        cell?.changeSelected(false)
        
        chosedIndexPath = nil
        player.pause()
    }
}

extension BFChooseMusicView : UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout{
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return categories.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "BFMusicCategoryCell", for: indexPath) as! BFMusicCategoryCell
        cell.addData(dic: categories[indexPath.row])
        cell.isChoosed = (indexPath.row == categorySelectIndex)
     
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let oldCell = collectionView.cellForItem(at: IndexPath(row: categorySelectIndex, section: 0)) as? BFMusicCategoryCell
        let newCell = collectionView.cellForItem(at: indexPath) as? BFMusicCategoryCell
        if indexPath.row > 0 {
            categorySelectIndex = indexPath.row
            musicTb.reloadData()
            
            oldCell?.isChoosed = false
            newCell?.isChoosed = true
            
            getMusicsForCategory(tagId: categories[categorySelectIndex].tagId ?? 0, pageNum: 1)
            
        }else {
            cancelChooseMusic()
        }
    }
    
    
}

extension BFChooseMusicView: BFFlowLayoutDelegate{
    
    func flowLayout(_ flowLayout: BFCollectionViewFlowLayout, itemHeight indexPath: IndexPath) -> CGFloat {
        
        var itemWidth = 30.0
        
        if let title = categories[indexPath.row].tagName, title.count > 0{
            let ww = title.textAutoWidth(height: 20, font: UIFont.systemFont(ofSize: 15, weight: .regular))
            itemWidth = max(30.0, ww)
        }
        
        return itemWidth
    }
}

extension String{
    func textAutoWidth(height:CGFloat, font:UIFont) ->CGFloat{
        let string = self as NSString
        let origin = NSStringDrawingOptions.usesLineFragmentOrigin
        let lead = NSStringDrawingOptions.usesFontLeading
        let rect = string.boundingRect(with:CGSize(width:0, height: height), options: [origin,lead],
                                       attributes: [NSAttributedString.Key.font:font],
                                       context:nil)
        return rect.width
        
    }
}