#import "RCTConvert+FFFastImage.h"
#import "FFFastImageSource.h"

@implementation RCTConvert (FFFastImage)

RCT_ENUM_CONVERTER(FFFPriority, (@{
                                   @"low": @(FFFPriorityLow),
                                   @"normal": @(FFFPriorityNormal),
                                   @"high": @(FFFPriorityHigh),
                                   }), FFFPriorityNormal, integerValue);

RCT_ENUM_CONVERTER(FFFCacheControl, (@{
                                       @"immutable": @(FFFCacheControlImmutable),
                                       @"web": @(FFFCacheControlWeb),
                                       @"cacheOnly": @(FFFCacheControlCacheOnly),
                                       }), FFFCacheControlImmutable, integerValue);

+ (FFFastImageSource *)FFFastImageSource:(id)json {
    // A null source (e.g. a null entry passed to preload).
    if (!json || json == (id)kCFNull) {
        return nil;
    }
    
    NSString *uriString = json[@"uri"];
    NSURL *uri = [self NSURL:uriString];
    
    FFFPriority priority = [self FFFPriority:json[@"priority"]];
    FFFCacheControl cacheControl = [self FFFCacheControl:json[@"cache"]];
    
    NSDictionary *headers = [self NSDictionary:json[@"headers"]];
    if (headers) {
        __block BOOL allHeadersAreStrings = YES;
        [headers enumerateKeysAndObjectsUsingBlock:^(NSString *key, id header, BOOL *stop) {
            if (![header isKindOfClass:[NSString class]]) {
                RCTLogError(@"Values of HTTP headers passed must be  of type string. "
                            "Value of header '%@' is not a string.", key);
                allHeadersAreStrings = NO;
                *stop = YES;
            }
        }];
        if (!allHeadersAreStrings) {
            // Set headers to nil here to avoid crashing later.
            headers = nil;
        }
    }
    
    FFFastImageSource *imageSource = [[FFFastImageSource alloc] initWithURL:uri priority:priority headers:headers cacheControl:cacheControl];
    id priorityJSON = json[@"priority"];
    imageSource.hasPriority = priorityJSON && priorityJSON != (id)kCFNull;
    NSString *cacheKey = [self NSString:json[@"cacheKey"]];
    imageSource.cacheKey = cacheKey.length > 0 ? cacheKey : nil;
    id memoryCache = json[@"memoryCache"];
    imageSource.memoryCache = memoryCache && memoryCache != (id)kCFNull ? [self BOOL:memoryCache] : YES;
    CGFloat scale = json[@"scale"] && json[@"scale"] != (id)kCFNull ? [self CGFloat:json[@"scale"]] : 1;
    imageSource.pixelCount = [self CGFloat:json[@"width"]] * [self CGFloat:json[@"height"]] * scale * scale;
    
    return imageSource;
}

RCT_ARRAY_CONVERTER(FFFastImageSource);

@end