//
//  CachedTileOverlay.m
//  Apex Mobile
//
//  Created by Rui Zhang on 12/31/19.
//  Copyright © 2019 United Software Applications, Inc. All rights reserved.
//

#import "CachedTileOverlay.h"
#import "FileCache.h"
@implementation CachedTileOverlay
- (void)loadTileAtPath:(MKTileOverlayPath)path result:(void (^)(NSData * _Nullable, NSError * _Nullable))result
{
    
    if (!result)
    {
        return;
    }
    
    NSURL* url=[self URLForTilePath:path];
    NSString* img_url = [url absoluteString];
    NSString* file_name=[img_url lastPathComponent];

    NSData *cachedData = [FileCache load_cached_img:file_name loadFrom:img_url];
    if (cachedData)
    {
        result(cachedData, nil);
    }
    else
    {
        
        
        NSLog(@"load image");
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
            
//            NSData*  downloadimg_data = [NSData dataWithContentsOfURL:[NSURL URLWithString:img_url]];
            NSError* error;
            NSData*  downloadimg_data = [NSData dataWithContentsOfURL:url options:NSDataReadingMappedIfSafe error:&error];
            dispatch_async(dispatch_get_main_queue(), ^{
                
                
                
                if(downloadimg_data!=nil)
                {
                    
                    [FileCache cache_img:downloadimg_data filename:file_name saveTo:img_url];
                    
//                    UIImage * img =[UIImage imageWithData:downloadimg_data];
//                    cell.cellImageView.image = img;
                }
                
                result(downloadimg_data, error);
//                else
//                    cell.cellImageView.image = [UIImage imageNamed:notFound];
                
            });
        });
        
        
//        NSURLRequest *request = [NSURLRequest requestWithURL:[self URLForTilePath:path]];
//        [NSURLConnection sendAsynchronousRequest:request queue:self.operationQueue completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
//            // Should inspect the response to see if the request completed successfully!!
//            [self.cache setObject:data forKey:[self URLForTilePath:path]];
//            result(data, connectionError);
//        }];
    }
    
    
    
    
    
//
//    NSLog(@"%@",url);
////    NSLog(@"%ld,%ld,%ld",path.x,path.y,path.z);
//    [super loadTileAtPath:path result:result];
}
@end