//
//  PhotoManager.swift
//  CreaditPayment
//
//  Created by 南鑫林 on 2018/12/19.
//  Copyright © 2018 南鑫林. All rights reserved.
//

import UIKit
import SwiftyMediator

class PhotoAndCameraManager: NSObject {
    private static let _sharedInstance = PhotoAndCameraManager()

    private override init() {} // 私有化init方法

    class func shared() -> PhotoAndCameraManager {
        return _sharedInstance
    }

    typealias PhotoAndCameraManagerImageBlock = (_ image: UIImage) -> Void

    var photoAndCameraManagerImageBlock : PhotoAndCameraManagerImageBlock?

    var isEditedImage : Bool = true


    /// 相册
    func authorizePhoto() {

        weak var weakself = self
        LBXPermissions.authorizePhotoWith { (granted) in
            if granted {
                let picker = UIImagePickerController()
                picker.sourceType = UIImagePickerController.SourceType.photoLibrary
                picker.delegate = weakself
                picker.allowsEditing = weakself?.isEditedImage ?? true
                picker.navigationController?.navigationBar.isTranslucent = false
                if #available(iOS 11.0, *) {
                    UIScrollView.appearance().contentInsetAdjustmentBehavior = .automatic
                } else {
                    if self.responds(to: #selector(setter: picker.automaticallyAdjustsScrollViewInsets)) {
                        picker.automaticallyAdjustsScrollViewInsets = true
                    }
                }
                picker.modalPresentationStyle = .fullScreen
                UIViewController.topMost?.present(picker, animated: true, completion: nil)
            } else {
                LBXPermissions.jumpToSystemPrivacySetting()
            }
        }
    }


    /// 相机
    func authorizeCamera() {
        weak var weakself = self
        LBXPermissions.authorizeCameraWith { (granted) in
            if granted {
                let picker = UIImagePickerController()
                picker.sourceType = UIImagePickerController.SourceType.camera
                picker.delegate = weakself
                picker.allowsEditing = weakself?.isEditedImage ?? true
                picker.navigationController?.navigationBar.isTranslucent = false
                if #available(iOS 11.0, *) {
                    UIScrollView.appearance().contentInsetAdjustmentBehavior = .automatic
                } else {
                    if self.responds(to: #selector(setter: picker.automaticallyAdjustsScrollViewInsets)) {
                        picker.automaticallyAdjustsScrollViewInsets = true
                    }
                }
                picker.modalPresentationStyle = .fullScreen
                UIViewController.topMost?.present(picker, animated: true, completion: nil)
            } else {
                LBXPermissions.jumpToSystemPrivacySetting()
            }
        }
    }
}

extension PhotoAndCameraManager : UIImagePickerControllerDelegate,UINavigationControllerDelegate {
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if #available(iOS 11.0, *) {
            UIScrollView.appearance().contentInsetAdjustmentBehavior = .never
        } else {
            if self.responds(to: #selector(setter: picker.automaticallyAdjustsScrollViewInsets)) {
                picker.automaticallyAdjustsScrollViewInsets = false
            }
        }
        //查看info对象
        //显示的图片
        var image : UIImage? = info[.editedImage] as? UIImage

        if (image == nil ) {
            image = info[.originalImage] as? UIImage
            return
        }

        if self.isEditedImage {
            //获取编辑后的图片
            image = info[.editedImage] as? UIImage
        }else{
            //获取选择的原图
            image = info[.originalImage] as? UIImage
        }

        //图片控制器退出
        picker.dismiss(animated: true, completion: {
            [weak self] () -> Void in
            if self?.photoAndCameraManagerImageBlock != nil {
                self?.photoAndCameraManagerImageBlock!(image!)
            }
        })
    }
    
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        if #available(iOS 11.0, *) {
            UIScrollView.appearance().contentInsetAdjustmentBehavior = .never
        } else {
            if self.responds(to: #selector(setter: picker.automaticallyAdjustsScrollViewInsets)) {
                picker.automaticallyAdjustsScrollViewInsets = false
            }
        }
        //图片控制器退出
        picker.dismiss(animated: true, completion: {() -> Void in})
    }
    
}