//
//  YBIBDefaultWebImageMediator.m
//  YBImageBrowserDemo
//
//  Created by 波儿菜 on 2019/8/27.
//  Copyright © 2019 杨波. All rights reserved.
//

#import "YBIBDefaultWebImageMediator.h"
#import "YBIBUtilities.h"
#if __has_include(<SDWebImage/SDWebImage.h>)
#import <SDWebImage/SDWebImage.h>
#else
#import "SDWebImageManager.h"
#endif

@implementation YBIBDefaultWebImageMediator

#pragma mark - <YBIBWebImageMediator>

- (id)yb_downloadImageWithURL:(NSURL *)URL requestModifier:(nullable YBIBWebImageRequestModifierBlock)requestModifier progress:(nonnull YBIBWebImageProgressBlock)progress success:(nonnull YBIBWebImageSuccessBlock)success failed:(nonnull YBIBWebImageFailedBlock)failed {
    if (!URL) return nil;
    SDWebImageDownloaderOptions options = SDWebImageDownloaderUseNSURLCache;
    SDWebImageDownloadToken *token = [[SDWebImageDownloader sharedDownloader] downloadImageWithURL:URL options:options progress:^(NSInteger receivedSize, NSInteger expectedSize, NSURL * _Nullable targetURL) {
        if (progress) progress(receivedSize, expectedSize);
    } completed:^(UIImage * _Nullable image, NSData * _Nullable data, NSError * _Nullable error, BOOL finished) {
        if (error) {
            if (failed) failed(error, finished);
        } else {
            if (success) success(data, finished);
        }
    }];
    return token;
}

- (void)yb_cancelTaskWithDownloadToken:(id)token {
    if (token && [token isKindOfClass:SDWebImageDownloadToken.class]) {
        [((SDWebImageDownloadToken *)token) cancel];
    }
}

- (void)yb_storeToDiskWithImageData:(NSData *)data forKey:(NSURL *)key {
    if (!key) return;
    NSString *cacheKey = [SDWebImageManager.sharedManager cacheKeyForURL:key];
    if (!cacheKey) return;
    
    YBIB_DISPATCH_ASYNC(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0), ^{
        [[SDImageCache sharedImageCache] storeImageDataToDisk:data forKey:cacheKey];
    })
}

- (void)yb_queryCacheOperationForKey:(NSURL *)key completed:(YBIBWebImageCacheQueryCompletedBlock)completed {
#define QUERY_CACHE_FAILED if (completed) {completed(nil, nil); return;}
    if (!key) QUERY_CACHE_FAILED
        NSString *cacheKey = [SDWebImageManager.sharedManager cacheKeyForURL:key];
    if (!cacheKey) QUERY_CACHE_FAILED
#undef QUERY_CACHE_FAILED
        
        // 'NSData' of image must be read to ensure decoding correctly.
        SDImageCacheOptions options = SDImageCacheQueryDataWhenInMemory | SDImageCacheScaleDownLargeImages;
    [[SDImageCache sharedImageCache] queryCacheOperationForKey:cacheKey options:options done:^(UIImage * _Nullable image, NSData * _Nullable data, SDImageCacheType cacheType) {
        if (completed) completed(image, data);
    }];
}

@end