ReaderHive/ReaderHive/Class/Home/C/NRHomeNovelListViewController.swift

//
//  NRHomeNovelListViewController.swift
//  ReaderHive
//
//  Created by 澜声世纪 on 2025/11/21.
//

import UIKit
import SnapKit


class NRHomeNovelListViewController: NRViewController {
    
    lazy var dataArr: [NRNovelModel] = []
    lazy var page = 1

    lazy var collectionViewLayout: NRWaterfallFlowLayout = {
        let layout = NRWaterfallFlowLayout()
        layout.delegate = self
        return layout
    }()
    
    lazy var collectionView: NRCollectionView = {
        let collectionView = NRCollectionView(frame: .zero, collectionViewLayout: collectionViewLayout)
        collectionView.delegate = self
        collectionView.dataSource = self
        collectionView.contentInset = .init(top: 0, left: 0, bottom:10, right: 0)
        collectionView.nr_addRefreshFooter { [weak self] in
            self?.handleFooterRefresh(nil)
        }
        collectionView.register(NRHomeNovelListCell.self, forCellWithReuseIdentifier: "cell")
        collectionView.register(NRHomeNovelListTextCell.self, forCellWithReuseIdentifier: "textCell")
        return collectionView
    }()
    
    lazy var listTitleView: NRHomeNovelHeaderContentView = {
        let view = NRHomeNovelHeaderContentView()
        view.titleLabel.text = "reader_home_title6".localized
        return view
    }()
    
    @MainActor deinit {
        NotificationCenter.default.removeObserver(self)
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.backgroundColor = .clear
        self.backgroundImageView.isHidden = true
        
        NotificationCenter.default.addObserver(self, selector: #selector(networkStatusDidChangeNotification), name: NRNetworkReachableManager.networkStatusDidChangeNotification, object: nil)

        nr_setupUI()
        
        Task {
            await requestDataArr(page: 1)
        }
    }
    

    override func listScrollView() -> UIScrollView {
        return collectionView
    }
    
    override func handleHeaderRefresh(_ completer: (() -> Void)?) {
        Task {
            await requestDataArr(page: 1)
            completer?()
        }
    }
    
    override func handleFooterRefresh(_ completer: (() -> Void)?) {
        Task {
            await requestDataArr(page: self.page + 1)
            self.collectionView.nr_endFooterRefreshing()
            completer?()
        }
    }
    
    @objc private func networkStatusDidChangeNotification() {
        if NRNetworkReachableManager.manager.isReachable == true, self.dataArr.isEmpty {
            Task {
                await requestDataArr(page: 1)
            }
        }
    }

}

extension NRHomeNovelListViewController {
    
    private func nr_setupUI() {
        view.addSubview(listTitleView)
        view.addSubview(collectionView)
        
        
        listTitleView.snp.makeConstraints { make in
            make.left.right.top.equalToSuperview()
        }
        
        collectionView.snp.makeConstraints { make in
            make.left.right.bottom.equalToSuperview()
//            make.top.equalTo(listTitleView.snp.bottom)
            make.top.equalToSuperview().offset(36)
        }
    }
    
}

//MARK: UICollectionViewDelegate UICollectionViewDataSource
extension NRHomeNovelListViewController: UICollectionViewDelegate, UICollectionViewDataSource {
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let model = dataArr[indexPath.row]
        let cellType = self.getCellType(indexPath: indexPath)
        if cellType == 1 {
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "textCell", for: indexPath) as! NRHomeNovelListTextCell
            cell.model = model
            return cell
        } else {
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! NRHomeNovelListCell
            cell.model = model
            return cell
        }
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.dataArr.count
    }
    
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        self.didScrollCallback?(scrollView)
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let vc = NRNovelDetailViewController()
        vc.novelId = self.dataArr[indexPath.row].id ?? ""
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
    func getCellType(indexPath: IndexPath) -> Int {
        let num = indexPath.row + 1
        if num % 3 == 2 {
            return 1
        }
        return 0
    }
}

//MARK: NRWaterfallMutiSectionDelegate
extension NRHomeNovelListViewController: NRWaterfallMutiSectionDelegate {
    func heightForRowAtIndexPath(collectionView collection: UICollectionView, layout: NRWaterfallFlowLayout, indexPath: IndexPath, itemWidth: CGFloat) -> CGFloat {
        let cellType = self.getCellType(indexPath: indexPath)
        if cellType == 1 {
            return NRHomeNovelListTextCell.contentHeight
        } else {
            let coverHeight = NRHomeNovelListCell.coverHeight
            return coverHeight + 86
        }
    }
    
    func lineSpacing(collectionView collection: UICollectionView, layout: NRWaterfallFlowLayout, section: Int) -> CGFloat {
        return 16
    }
    
    func interitemSpacing(collectionView collection: UICollectionView, layout: NRWaterfallFlowLayout, section: Int) -> CGFloat {
        return 13
    }
    
    func insetForSection(collectionView collection: UICollectionView, layout: NRWaterfallFlowLayout, section: Int) -> UIEdgeInsets {
        return .init(top: 0, left: 15, bottom: 0, right: 15)
    }
}

extension NRHomeNovelListViewController {
    
    private func requestDataArr(page: Int) async {
        guard let list = await NRHomeAPI.requestHomeNewData(page: page) else { return }
        
        if page == 1 {
            self.dataArr.removeAll()
        }
        self.dataArr += list
        self.page = page
        self.collectionView.reloadData()
    }
    
}