//
//  SPEpisodeView.swift
//  Thimra
//
//  Created by 曾觉新 on 2025/4/16.
//

import UIKit

class SPEpisodeView: HWPanModalContentView {
    
    var currentIndex: Int = 0 {
        didSet {
            self.collectionView.reloadData()
        }
    }
    
    var shortModel: SPShortModel? {
        didSet {
            coverImageView.sp_setImage(url: shortModel?.image_url)
            titleLabel.text = shortModel?.name
            desLabel.text = shortModel?.sp_description
        }
    }
    
    var dataArr: [SPVideoInfoModel] = [] {
        didSet {
            self.collectionView.reloadData()
            
            var menuDataArr = [String]()
            let totalEpisode = dataArr.count
            var index = 0
            var remainingEpisodes = totalEpisode

            while remainingEpisodes > 0 {
                let minIndex = index * 30
                var maxIndex = minIndex + 29
                if maxIndex >= dataArr.count {
                    maxIndex = dataArr.count - 1
                }
                
                let minEpisode = dataArr[minIndex].episode ?? "0"
                let maxEpisode = dataArr[maxIndex].episode ?? "0"
                
                if minEpisode == maxEpisode {
                    menuDataArr.append("\(minEpisode)")
                } else {
                    menuDataArr.append("\(minEpisode)-\(maxEpisode)")
                }
                
                remainingEpisodes -= 30
                index += 1
            }

            self.menuView.dataArr = menuDataArr
        }
    }
    
    var didSelectedIndex: ((_ index: Int) -> Void)?
    
    var isDecelerating = false
    var isDragging = false
    
    //MARK: UI属性
    private lazy var bgView: UIView = {
        let view = UIImageView(image: UIImage(named: "episode_bg_image_01"))
        return view
    }()
    
    private lazy var collectionViewLayout: UICollectionViewFlowLayout = {
        let itemWidth = floor((kSPScreenWidth - 7 * 4 - 32) / 5)
        
        let layout = UICollectionViewFlowLayout()
        layout.itemSize = .init(width: itemWidth, height: 54)
        layout.minimumLineSpacing = 7
        layout.minimumInteritemSpacing = 7
        layout.sectionInset = .init(top: 0, left: 16, bottom: 0, right: 16)
        return layout
    }()
    
    private lazy var collectionView: SPCollectionView = {
        let collectionView = SPCollectionView(frame: .zero, collectionViewLayout: collectionViewLayout)
        collectionView.delegate = self
        collectionView.dataSource = self
        SPEpisodeCell.registerCell(collectionView: collectionView)
        return collectionView
    }()
    
    private lazy var indicatorView: UIView = {
        let view = UIView()
        view.backgroundColor = .color5A5C67()
        view.layer.cornerRadius = 2.5
        view.layer.masksToBounds = true
        return view
    }()
    
    private lazy var coverImageView: SPImageView = {
        let imageView = SPImageView()
        imageView.layer.cornerRadius = 4
        imageView.layer.masksToBounds = true
        imageView.layer.borderColor = UIColor.colorFFFFFF(alpha: 0.26).cgColor
        imageView.layer.borderWidth = 1
        return imageView
    }()
    
    private lazy var titleLabel: UILabel = {
        let label = UILabel()
        label.font = .fontBold(ofSize: 14)
        label.textColor = .colorFFFFFF()
        label.numberOfLines = 2
        return label
    }()
    
    private lazy var desLabel: UILabel = {
        let label = UILabel()
        label.font = .fontRegular(ofSize: 10)
        label.textColor = .colorA8A5AA()
        label.numberOfLines = 5
        return label
    }()
    
    private lazy var lineView: UIView = {
        let view = UIView()
        view.backgroundColor = .color545454()
        return view
    }()
    
    private lazy var menuView: SPEpisodeMenuView = {
        let view = SPEpisodeMenuView()
        view.didSelectedIndex = { [weak self] index in
            guard let self = self else { return }
            var row = 0
            if index > 0 {
                row = index * 30 + 10
                let count = self.dataArr.count
                if row >= count {
                    row = count - 1
                }
            }
            let indexPath = IndexPath.init(row: row, section: 0)
            self.collectionView.scrollToItem(at: indexPath, at: .centeredVertically, animated: true)
            
        }
        return view
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        _setupUI()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    
    //MARK: HWPanModalPresentable
    override func panScrollable() -> UIScrollView? {
        return collectionView
    }
    
    override func longFormHeight() -> PanModalHeight {
        return PanModalHeightMake(.content, kSPScreenHeight * (2 / 3))
    }
    
    override func showDragIndicator() -> Bool {
        return false
    }
    
    override func backgroundConfig() -> HWBackgroundConfig {
        let config = HWBackgroundConfig()
        config.backgroundAlpha = 0.4
        return config
    }
    
//    override func present(in view: UIView?) {
//        super.present(in: view)
//        self.hw_contentView.addEffectView(style: .dark)
//    }
    
    
    
}

extension SPEpisodeView {
    
    private func _setupUI() {
        addSubview(bgView)
        addSubview(indicatorView)
        addSubview(coverImageView)
        addSubview(titleLabel)
        addSubview(desLabel)
        addSubview(menuView)
        addSubview(lineView)
        addSubview(collectionView)
        
        
        bgView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
        
        self.indicatorView.snp.makeConstraints { make in
            make.centerX.equalToSuperview()
            make.top.equalToSuperview().offset(10)
            make.width.equalTo(40)
            make.height.equalTo(5)
        }
        
        self.coverImageView.snp.makeConstraints { make in
            make.left.equalToSuperview().offset(15)
            make.top.equalToSuperview().offset(39)
            make.width.equalTo(70)
            make.height.equalTo(104)
        }
        
        self.titleLabel.snp.makeConstraints { make in
            make.left.equalTo(self.coverImageView.snp.right).offset(12)
            make.right.lessThanOrEqualToSuperview().offset(-16)
            make.top.equalTo(self.coverImageView)
        }
        
        self.desLabel.snp.makeConstraints { make in
            make.left.equalTo(self.titleLabel)
            make.right.lessThanOrEqualToSuperview().offset(-16)
//            make.top.equalTo(self.coverImageView.snp.bottom).offset(8)
            make.top.equalTo(titleLabel.snp.bottom).offset(6)
        }
        
        self.menuView.snp.makeConstraints { make in
            make.left.right.equalTo(self.lineView)
            make.bottom.equalTo(self.lineView)
        }
        
        self.lineView.snp.makeConstraints { make in
            make.left.equalToSuperview().offset(16)
            make.centerX.equalToSuperview()
            make.top.equalTo(self.coverImageView.snp.bottom).offset(46)
            make.height.equalTo(0.7)
        }
        
        self.collectionView.snp.makeConstraints { make in
//            make.edges.equalToSuperview()
            make.left.right.bottom.equalToSuperview()
            make.top.equalTo(self.lineView.snp.bottom).offset(15)
        }
    }
    
}

//MARK: --------------  UICollectionViewDelegate & UICollectionViewDataSource  --------------
extension SPEpisodeView: UICollectionViewDelegate, UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = SPEpisodeCell.dequeueReusableCell(collectionView: collectionView, indexPath: indexPath)
        cell.videoInfoModel = self.dataArr[indexPath.row]
        cell.sp_isSelected = indexPath.row == currentIndex
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.dataArr.count
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        guard indexPath.row != currentIndex else { return }
        self.didSelectedIndex?(indexPath.row)
        self.dismiss(animated: true) {
            
        }
    }
    
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        if isDragging || isDecelerating {
            updateMuneSelectedIndex()
        }
    }
    
    func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
        isDecelerating = false
        updateMuneSelectedIndex()
    }
    
    func scrollViewWillBeginDecelerating(_ scrollView: UIScrollView) {
        isDecelerating = true
    }
    
    func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
        isDragging = true
    }
    
    func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
        isDragging = false
    }
    
    
    func updateMuneSelectedIndex() {
        let indexPathArr = collectionView.indexPathsForVisibleItems
        
        var minRow = dataArr.count - 1
        var maxRow = 0
        
        for indexPath in indexPathArr {
            if indexPath.row < minRow {
                minRow = indexPath.row
            }
            if indexPath.row > maxRow {
                maxRow = indexPath.row
            }
        }
        
        let selectedIndex = maxRow / 30
        if menuView.selectedIndex != selectedIndex {
            menuView.selectedIndex = selectedIndex
        }
    }
    
}