#import <UIKit/UIKit.h>

#import<AssetsLibrary/AssetsLibrary.h>

#import <AVFoundation/AVFoundation.h>

#import "PhotoEditViewController.h"

#define SettingCamera 10102

@interface OnePhotoController :UIViewController

@property (nonatomic,weak) id<PhotoEditDelegate> delegate;

@property

@end

#import "UIImage+FixOrientation.h"

#import "OnePhotoController.h"

#import "PhotoSampleItem.h"

#import "ETPhotoUtil.h"

@interface OnePhotoController ()<UICollectionViewDataSource,UICollectionViewDelegate,UIAlertViewDelegate>

@property (weak,nonatomic

@property (nonatomic,strong) UICollectionView *collectionView;

@property (nonatomic,strong) NSMutableArray *allGroups;

@property (nonatomic,strong) ALAssetsLibrary*library ;

@property (nonatomic,assign) BOOL firstIn;

@end

@implementation OnePhotoController

- (instancetype)init{

self = [superinit];

if (self) {

_firstIn =YES;

    }

returnself;

}

- (void)viewDidLoad {

    [superviewDidLoad];

//設定collectionView

self.allGroups = [[ETPhotoUtilsharedInstance] allPhotos];

self.naviTitleItem.title = [[ETPhotoUtilsharedInstance]cameraRoll];

    [selfsetCollectionViewFlowLayout];

    [self.collectionViewreloadData];

if ([self.allGroupscount]==0) {

        [selfisAuthorizationStatus];

    }

}

- (void)viewWillAppear:(BOOL)animated{

    [superviewWillAppear:animated];

//    if (self.allGroups.count>0&&_firstIn) {

//        NSIndexPath *indexPath= [NSIndexPath indexPathForRow:(self.allGroups.count -1) inSection:0];

//        [self.collectionView scrollToItemAtIndexPath:indexPath atScrollPosition:UICollectionViewScrollPositionBottom animated:NO];

//        _firstIn = NO;

//    }

}

- (void)didReceiveMemoryWarning {

    [superdidReceiveMemoryWarning];

}

#pragma mark - Main Method

- (NSMutableArray *)allGroups{

if (_allGroups ==nil) {

_allGroups = [NSMutableArrayarray];

    }

return_allGroups;

}

- (void)setCollectionViewFlowLayout{

UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayoutalloc] init];

    layout.itemSize =CGSizeMake((kScreenWidth -30)*.25,(kScreenWidth -30)*.25);

    layout.minimumLineSpacing =6;

    layout.minimumInteritemSpacing =6;

    layout.sectionInset =UIEdgeInsetsMake(10,6, 10,6);

self.collectionView = [[UICollectionViewalloc] initWithFrame:CGRectMake(0,64, kScreenWidth, kScreenHeight-64)collectionViewLayout:layout];

self.collectionView.backgroundColor = [UIColorclearColor];

    [self.collectionViewregisterClass:[PhotoSampleItemclass] forCellWithReuseIdentifier:@"collectionView"];

self.collectionView.dataSource = self;

self.collectionView.delegate =self;

    [self.viewaddSubview:self.collectionView];

}

//取消按鈕

- (IBAction)cancelAction:(UIButton *)sender {

    [selfdismissViewControllerAnimated:YEScompletion:nil];

}

#pragma mark - UICollectionViewDelegate

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{

returnself.allGroups.count;

}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{

PhotoSampleItem *cell = [collectionViewdequeueReusableCellWithReuseIdentifier:@"collectionView"forIndexPath:indexPath];

dispatch_async(dispatch_get_global_queue(0,0), ^{

ALAsset *alaset = [self.allGroupsobjectSafetyAtIndex:indexPath.row];

//獲取到媒體的型別

NSString *type = [alasetvalueForProperty:ALAssetPropertyType];

//獲取到相片、視訊的縮圖

UIImage *image =nil;

if ([selfcurrentDeviceIsIpad]){

//獲取到相片、視訊的縮圖

CGImageRef cgImage = [[alasetdefaultRepresentation] fullScreenImage];

            image = [UIImageimageWithCGImage:cgImage];

        }else{

//獲取到相片、視訊的縮圖

CGImageRef cgImage = [alasetaspectRatioThumbnail];

            image = [UIImageimageWithCGImage:cgImage];

        }

//媒體型別是相片

if ([typeisEqualToString:ALAssetTypePhoto])

        {

dispatch_async(dispatch_get_main_queue(), ^{

                cell.imageView.image=image;

            });

        }

    });

return cell;

}

- (BOOL)currentDeviceIsIpad{

NSString* strDevice = [[UIDevicecurrentDevice].modelsubstringToIndex:4];

if ([strDeviceisEqualToString:@"iPad"]) {

returnYES;

    } else {

returnNO;

    }

}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{

ALAsset *alasset =nil;

    alasset = [self.allGroupsobjectSafetyAtIndex:indexPath.row];

NSArray *item= [UIImagegetHeadMetaFromAlasset:alasset];

PhotoEditViewController *editVC = [PhotoEditViewControllernew];

    editVC.delegate =self.delegate;

    editVC.upImgs = item;

    editVC.isScale =self.isScale;

    [self.navigationControllerpushViewController:editVCanimated:YES];

}

#pragma  mark - **********ALAssetsGroup DataSource*************

- (void)isAuthorizationStatus{

// 獲取當前應用對照片的訪問授權狀態

ALAuthorizationStatus authorizationStatus = [ALAssetsLibraryauthorizationStatus];

// 如果沒有獲取訪問授權，或者訪問授權狀態已經被明確禁止，則顯示提示語，引導使用者開啟授權

if (authorizationStatus ==ALAuthorizationStatusRestricted || authorizationStatus ==ALAuthorizationStatusDenied) {

// 展示提示語

NSDictionary *mainInfoDictionary = [[NSBundlemainBundle] infoDictionary];

NSString *appName = [mainInfoDictionaryobjectForKey:@"CFBundleName"];

UIAlertView * alertView = [[UIAlertViewalloc] initWithTitle:nilmessage:[NSStringstringWithFormat:@"請在裝置的\"設定-隱私-照片\"選項中，允許%@訪問你的手機相簿", appName] delegate:selfcancelButtonTitle:@"設定"otherButtonTitles:@"稍後再說",nil];

        alertView.tag =SettingCamera;

        [alertView show];

    }

}

#pragma mark - **********AlertViewDelegate***********

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{

if(buttonIndex==0){

NSURL *setUrl =nil;

if (alertView.tag ==SettingCamera) {

            setUrl = [NSURLURLWithString:@"prefs:root=Privacy"];

        }

        [[UIApplicationsharedApplication] openURL:setUrl];

    }

if (buttonIndex==1) {

if (alertView.tag ==SettingCamera) {

            [selfdismissViewControllerAnimated:YEScompletion:nil];

        }

    }

}

@end