//
//  DocumentPickerManager.m
//  隐私保护
//
//  Created by xd h on 2025/3/21.
//

#import "DocumentPickerManager.h"
#import <UIKit/UIKit.h>
#import <MobileCoreServices/MobileCoreServices.h>

@interface DocumentPickerManager () <UIDocumentPickerDelegate>
{
    NSArray *curURLS;
    NSInteger PickerTotalNumber;//用户选择的数目
    NSInteger didPickerOkNumber;//拷贝到APP内成功的数量
    NSInteger didPickerFailNumber;//拷贝到APP内失败的数量
}

@property (nonatomic,copy) pickerSuccess didPickSuc;
@end

@implementation DocumentPickerManager
+ (instancetype)shareManager {
    static DocumentPickerManager *_instance;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        _instance = [[self alloc] init];
    });
    return _instance;
}


- (void)openDocumentPickerSuccess:(pickerSuccess)success {
    
    PickerTotalNumber = 0;
    didPickerOkNumber = 0;
    didPickerFailNumber = 0;
    
    curURLS = @[];
    
    _didPickSuc = success;
    
    // 创建 UIDocumentPickerViewController
    UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[(NSString *)kUTTypeItem] inMode:UIDocumentPickerModeImport];
    
    // 启用多选
    documentPicker.allowsMultipleSelection = YES;
    // 设置代理
    documentPicker.delegate = self;
    
    // 设置模态呈现样式
    documentPicker.modalPresentationStyle = UIModalPresentationFormSheet;
    
    // 弹出文档选择器
    UIViewController* vc = [iTools appRootViewController];
    [vc presentViewController:documentPicker animated:YES completion:nil];
}

#pragma mark - UIDocumentPickerDelegate

- (void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentsAtURLs:(NSArray<NSURL *> *)urls {
    
    PickerTotalNumber = urls.count;
    curURLS = urls;
    for (NSURL *fileURL in urls) {
        // 将文件保存到应用的沙盒目录
        [self saveFileToAppSandbox:fileURL];
    }
}

- (void)documentPickerWasCancelled:(UIDocumentPickerViewController *)controller {
    // 用户取消了文件选择
    HLog(@"Document picker was cancelled");
    [self didFinishPickerTaskFun];
}

- (void)saveFileToAppSandbox:(NSURL *)fileURL {
    // 获取文件名称
    NSString *fileName = [fileURL lastPathComponent];
    
    // 获取应用的 Documents 目录路径
//    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
//    NSString *documentsDirectory = [paths firstObject];
    
    NSString *documentsDirectory = kSHPath_FileAPP;
    
    // 构建目标文件路径
    NSString *destinationPath = [documentsDirectory stringByAppendingPathComponent:fileName];
    NSURL *destinationURL = [NSURL fileURLWithPath:destinationPath];
    
    // 检查文件是否已经存在
    if ([[NSFileManager defaultManager] fileExistsAtPath:destinationPath]) {
        HLog(@"文件已存在: %@", destinationPath);
        didPickerOkNumber ++;
        [self didFinishPickerTaskFun];
        return;
    }
    
    // 将文件从临时位置复制到目标路径
    KWeakSelf
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        NSError *error;
        BOOL success = [[NSFileManager defaultManager] copyItemAtURL:fileURL toURL:destinationURL error:&error];
        
        if (success) {
            HLog(@"文件保存成功: %@", destinationPath);
            self->didPickerOkNumber ++;
        } else {
            HLog(@"文件保存失败: %@", error.localizedDescription);
            self->didPickerFailNumber ++;
        }
        
        mainBlock(^{
            [weakSelf didFinishPickerTaskFun];
        });
        
    });
}

#pragma mark 判断是否处理完成数据
- (void)didFinishPickerTaskFun
{
    if (didPickerOkNumber + didPickerFailNumber < PickerTotalNumber ) {
        return;
    }
    
    HLog(@"处理完成了")
    if(!curURLS || curURLS.count == 0){
        return;
    }
    
    if(_didPickSuc){
        _didPickSuc(curURLS);
    }
}
@end