//
//  SPHomeViewController.swift
//  ShortPlay
//
//  Created by 曾觉新 on 2025/4/8.
//

import UIKit

class SPHomeViewController: SPHomeChildController {
    
    ///模版数据
    private var moduleModel: SPHomeModuleModel?
    
    
    private lazy var layout: UICollectionViewFlowLayout = {
        let layout = UICollectionViewFlowLayout()
        return layout
    }()
    
    private lazy var collectionView: SPCollectionView = {
        let collectionView = SPCollectionView(frame: .zero, collectionViewLayout: layout)
        collectionView.delegate = self
        collectionView.dataSource = self
        collectionView.register(SPHomeHeaderView.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: "headerView")
        SPCollectionViewCell.registerCell(collectionView: collectionView)
        return collectionView
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
//        view.backgroundColor = .clear
        requestModuleData()
        _setupUI()
        
    }
    
    override func fetchChildControllerScrollView() -> UIScrollView? {
        return self.collectionView
    }
    
}

extension SPHomeViewController {
    
    private func _setupUI() {
        view.addSubview(self.collectionView);
        
        self.collectionView.snp.makeConstraints { make in
            make.left.right.bottom.equalToSuperview()
            make.top.equalToSuperview().offset(topMargins)
        }
    }
}

//MARK: --------------   UICollectionViewDelegate & UICollectionViewDataSource  --------------
extension SPHomeViewController: UICollectionViewDelegate, UICollectionViewDataSource {
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = SPCollectionViewCell.dequeueReusableCell(collectionView: collectionView, indexPath: indexPath)
        return cell
    }
    
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 0
    }
    
    func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
        if let headerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "headerView", for: indexPath) as? SPHomeHeaderView {
            headerView.moduleModel = self.moduleModel
            return headerView
        }
        return UICollectionReusableView()
    }
    
    
}


extension SPHomeViewController {
    
    private func requestModuleData() {
        SPHomeAPI.requestHomeModuleData { [weak self] model in
            guard let self = self else { return }
            if let model = model {
                self.moduleModel = model
                self.layout.headerReferenceSize = CGSize(width: kSPScreenWidth, height: SPHomeHeaderView.contentHeight(model: model))
                self.collectionView.reloadData()
            }
        }
    }
    
}