//
//  SPHomeTrendingView.swift
//  ShortPlay
//
//  Created by 曾觉新 on 2025/4/14.
//

import UIKit

class SPHomeTrendingView: SPHomeDataItemView {
    
    private static func itemSize() -> CGSize {
        let width = floor((kSPScreenWidth - 15 * 2 - 12 * 2) / 3)
        let imageScale: CGFloat = 153 / 107
        let height = width * imageScale + 38
        
        return CGSize(width: width, height: height)
    }

    override class func contentHeight(dataArr: [SPShortModel]) -> CGFloat {
        
        var height = self.contentToTop
        
        var lineCount = dataArr.count / 3
        if dataArr.count % 3 > 0 {
            lineCount += 1
        }
        
        let contentHeight = itemSize().height * CGFloat(lineCount) + 12 * CGFloat(lineCount - 1)
        if contentHeight > 0 {
            height += contentHeight
        } else {
            height += 1
        }
        
        return height
    }
    
    override var dataArr: [SPShortModel]? {
        didSet {
            self.collectionView.reloadData()
        }
    }
    
    private lazy var collectionViewLayout: UICollectionViewFlowLayout = {
        let layout = UICollectionViewFlowLayout()
        layout.minimumLineSpacing = 12
        layout.minimumInteritemSpacing = 12
        layout.itemSize = Self.itemSize()
        layout.sectionInset = UIEdgeInsets(top: 0, left: 15, bottom: 0, right: 15)
        return layout
    }()
    
    private lazy var collectionView: SPCollectionView = {
        let collectionView = SPCollectionView(frame: .zero, collectionViewLayout: collectionViewLayout)
        collectionView.delegate = self
        collectionView.dataSource = self
        collectionView.isScrollEnabled = false
        SPHomeTrendingCell.registerCell(collectionView: collectionView)
        return collectionView
    }()
    
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        self.titleLabel.text = "Trending Now".localized
        
        _setupUI()
    }
    
    @MainActor required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

extension SPHomeTrendingView {
    
    private func _setupUI() {
        contentView.addSubview(collectionView)
        
        collectionView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
    }
    
}

//MARK: --------------   UICollectionViewDataSource & UICollectionViewDelegate  --------------
extension SPHomeTrendingView: UICollectionViewDataSource, UICollectionViewDelegate {
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = SPHomeTrendingCell.dequeueReusableCell(collectionView: collectionView, indexPath: indexPath)
        cell.model = dataArr?[indexPath.row]
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return dataArr?.count ?? 0
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let model = self.dataArr?[indexPath.row]
        
        let vc = SPTVPlayerListViewController()
        vc.shortPlayId = model?.short_play_id
        self.viewController?.navigationController?.pushViewController(vc, animated: true)
    }
}