//
//  ShowFullPicController.swift
//  PaiAi
//
//  Created by zhengjianfei on 16/4/9.
//  Copyright © 2016年 FFIB. All rights reserved.
//

import UIKit
import PaiaiDataKit
import PaiaiUIKit

final class ShowFullPicController: UIViewController {

    // MARK: Storyboard property
    @IBOutlet var collectionView: UICollectionView!
//    @IBOutlet weak var progressView: FFProgress!
   // MARK: parameter property
    lazy var datas = [PhotoItem]()
    lazy var currentPhotoIndex = 0
    lazy var firstLayout = true
    lazy var currentPageIndex = 0
    lazy var showNomark = false
    lazy var showHD = false

    var shufflingImage = [String]()

    // MARK: Controller fucntion
    override func viewDidLoad() {
        super.viewDidLoad()
        navigationController?.isNavigationBarHidden = true
//        titleWithbackBar = ""

     }

    override func viewDidLayoutSubviews() {
        if firstLayout {
            collectionView.contentOffset = CGPoint(x: (CGFloat(currentPhotoIndex) * (collectionView.width)), y: 0)
            firstLayout = false
        }
        super.viewDidLayoutSubviews()
    }

    // MARK: Storyboard  button function
    @IBAction  func back() {
         _ = navigationController?.popViewController(animated: true)
        guard let ctl = navigationController?.viewControllers.last as? DetailPageController else {
            return
        }
        ctl.currentPhotoIndex = currentPageIndex
        ctl.tableView.reloadData()
    }
    @IBAction func rotateTheImage(_ sender: UIButton) {
        guard let cell = collectionView.cellForItem(at: IndexPath(item: currentPageIndex, section: 0)) as? ImageCell else {
            return
        }
        UIView.beginAnimations("image.rotate", context: nil)
        UIView.animate(withDuration: 0.5) {
            let image = cell.photoImage.image
            switch image?.imageOrientation.rawValue {
            case .some(0):
                cell.photoImage.image = UIImage(cgImage: (image?.cgImage)!, scale: UIScreen.main.scale, orientation: UIImage.Orientation.right)
            case .some(1):
                cell.photoImage.image = UIImage(cgImage: (image?.cgImage)!, scale: UIScreen.main.scale, orientation: UIImage.Orientation.left)
            case .some(2):
                cell.photoImage.image = UIImage(cgImage: (image?.cgImage)!, scale: UIScreen.main.scale, orientation: UIImage.Orientation.up)
            case .some(3):
                cell.photoImage.image = UIImage(cgImage: (image?.cgImage)!, scale: UIScreen.main.scale, orientation: UIImage.Orientation.down)
            default:
                break
            }
        }
    }

    @IBAction func load() {
        guard let cell = collectionView.cellForItem(at: IndexPath(item: currentPageIndex, section: 0)) as? ImageCell else {
//            FFToastView.showToast(inView: view, withText: "未检测到图片")
            return
        }
        guard let image = cell.photoImage.image else {
//            FFToastView.showToast(inView: view, withText: "未检测到图片")
            return
        }
        UIImageWriteToSavedPhotosAlbum(image, self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)
    }

    @objc func image(_ image: UIImage?, didFinishSavingWithError error: NSError?, contextInfo info: UnsafeMutableRawPointer) {
        if error != nil {
//            FFToastView.showToast(inView: view, withText: "保存图片失败")
        } else {
//            FFToastView.showImageToast(inView: view, withText: "已保存图片到相册", withImage: "提示弹窗-勾")
        }

    }
}

// MARK: UICollectionView delegate
extension ShowFullPicController: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {

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

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "imageCell", for: indexPath) as! ImageCell
        if shufflingImage.count <= 0 {
            let data = datas[indexPath.item]
            let urlStr = data.murl.isEmpty ? data.photo_url : data.murl
            cell.setModel(url: urlStr)
        } else {
            cell.setModel(url: shufflingImage[indexPath.row])
        }
        return cell
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: collectionView.width, height: collectionView.height - 20)
    }

    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        let page = Int(scrollView.contentOffset.x / (collectionView.width))
        currentPageIndex = page
    }
}