//
//  NRExploreNovelGenresViewController.swift
//  ReaderHive
//
//  Created by 长沙鸿瑶 on 2025/11/26.
//

import UIKit
import SnapKit

class NRExploreNovelGenresViewController: NRViewController {

    
    lazy var dataArr: [NRCategoryModel] = []
    
    
    lazy var collectionViewLayout: UICollectionViewCompositionalLayout = {
        
        let item = NSCollectionLayoutItem(layoutSize: .init(widthDimension: .fractionalWidth(0.5), heightDimension: .fractionalHeight(1)))
        
        let group = NSCollectionLayoutGroup.horizontal(layoutSize: .init(widthDimension: .fractionalWidth(1), heightDimension: .absolute(48)), subitems: [item])
        group.interItemSpacing = .fixed(8)
        
        let section = NSCollectionLayoutSection(group: group)
        section.interGroupSpacing = 8
        section.contentInsets = .init(top: 0, leading: 12, bottom: 0, trailing: 12)
        
        let configuration = UICollectionViewCompositionalLayoutConfiguration()
        
        let layout = UICollectionViewCompositionalLayout(section: section, configuration: configuration)
        
        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.register(NRExploreNovelGenresCell.self, forCellWithReuseIdentifier: "cell")
        return collectionView
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.backgroundImageView.isHidden = true
        self.view.backgroundColor = .clear
        
        nr_setupUI()
        
        Task {
            await requestDataArr()
        }
    }
    

  
}

extension NRExploreNovelGenresViewController {
    
    private func nr_setupUI() {
        view.addSubview(collectionView)
        
        collectionView.snp.makeConstraints { make in
            make.left.right.bottom.equalToSuperview()
            make.top.equalToSuperview().offset(16)
        }
    }
    
}

//MARK: UICollectionViewDelegate UICollectionViewDataSource
extension NRExploreNovelGenresViewController: UICollectionViewDelegate, UICollectionViewDataSource {
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! NRExploreNovelGenresCell
        cell.textLabel.text = dataArr[indexPath.row].name
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return dataArr.count
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let vc = NRNovelGenresViewController()
        vc.model = self.dataArr[indexPath.row]
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
}

extension NRExploreNovelGenresViewController {
    
    private func requestDataArr() async {
        guard let list = await NRHomeAPI.requestCategoryList() else { return }
        
        self.dataArr = list
        self.collectionView.reloadData()
    }
    
}