//
//  DetailPagePhotoCell.swift
//  PaiAi
//
//  Created by mac on 2016/11/2.
//  Copyright © 2016年 FFIB. All rights reserved.
//

import UIKit
import PaiaiDataKit
import PaiaiUIKit

protocol CellDelegate: class {
    func returnCurrentIndex(index: Int)
    func selectIndex(indexpath: IndexPath)
    func pushNext()
}
extension CellDelegate {
    func returnCurrentIndex(index: Int) {}
    func selectIndex(indexpath: IndexPath) {}
    func pushNext() {}
}

class DetailPagePhotoCell: UITableViewCell {

    // MARK: Storyboard property
    @IBOutlet weak var collectionView: UICollectionView!

    // MARK: delete property
    weak var delegate: CellDelegate?

  // MARK: parameter property
    lazy  var first = true
    lazy var datas = [PhotoItem]()
    lazy var currentPhotoIndex = 0
}

extension DetailPagePhotoCell: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {

    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return datas.count
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "photoDetailCell", for: indexPath)
        guard let imageView = cell.viewWithTag(1010) as? UIImageView else {
            return cell
        }
        var imageStr = ""
        if !datas[indexPath.row].murl.isEmpty {
            imageStr = datas[indexPath.row].murl
        } else if !datas[indexPath.row].rurl.isEmpty {
            imageStr = datas[indexPath.row].rurl
        } else {
            imageStr = datas[indexPath.row].photo_thumbnail2_url
        }
//        imageView.setImageWithNullableURL(imageStr, placeholderImage: UIImage(named: "详情页占位图"))
        return cell
    }

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        delegate?.selectIndex(indexpath: indexPath)
    }

    func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
        delegate?.returnCurrentIndex(index: indexPath.row)
        guard first else {
            return
        }
        collectionView.scrollToItem(at: IndexPath(row: currentPhotoIndex, section: 0), at: .left, animated: false)
        first = false
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: kScreenWidth, height: 359)
    }

    


}