#import "FasterImageView.h"

#import <react/renderer/components/FasterImageViewSpec/ComponentDescriptors.h>
#import <react/renderer/components/FasterImageViewSpec/EventEmitters.h>
#import <react/renderer/components/FasterImageViewSpec/Props.h>
#import <react/renderer/components/FasterImageViewSpec/RCTComponentViewHelpers.h>
#import <SDWebImage/SDWebImage.h>
#import "Utils.h"

#import "RCTFabricComponentsPlugins.h"

using namespace facebook::react;

@interface FasterImageView () <RCTFasterImageViewViewProtocol>

@end

@implementation FasterImageView {
  UIImageView *_imageView;
}

+ (ComponentDescriptorProvider)componentDescriptorProvider
{
    return concreteComponentDescriptorProvider<FasterImageViewComponentDescriptor>();
}

- (instancetype)initWithFrame:(CGRect)frame
{
  if (self = [super initWithFrame:frame]) {
    static const auto defaultProps = std::make_shared<const FasterImageViewProps>();
    _props = defaultProps;
    _imageView = [[UIImageView alloc] init];
    _imageView.clipsToBounds = YES;
    _imageView.layer.masksToBounds = YES;
    self.contentView = _imageView;
  }

  return self;
}

- (void)updateProps:(Props::Shared const &)props oldProps:(Props::Shared const &)oldProps
{
    const auto &oldViewProps = *std::static_pointer_cast<FasterImageViewProps const>(_props);
    const auto &newViewProps = *std::static_pointer_cast<FasterImageViewProps const>(props);
  
  if (
          (oldViewProps.source.uri != newViewProps.source.uri) ||
          (oldViewProps.source.tintColor != newViewProps.source.tintColor) ||
          (oldViewProps.source.resizeMode != newViewProps.source.resizeMode) ||
          (oldViewProps.source.isBase64 != newViewProps.source.isBase64)
          ) {
          NSString *stringURL = [[NSString alloc] initWithCString: newViewProps.source.uri.c_str() encoding: NSASCIIStringEncoding];
          NSURL *url = [NSURL URLWithString: stringURL];
          NSString *tintColor = [[NSString alloc] initWithCString: newViewProps.source.tintColor.c_str() encoding: NSASCIIStringEncoding];
          NSString *resizeMode = [[NSString alloc] initWithCString: newViewProps.source.resizeMode.c_str() encoding: NSASCIIStringEncoding];
          Boolean isBase64 = newViewProps.source.isBase64;
           if((url && [url scheme] && [url host])) {
                  [_imageView
                   sd_setImageWithURL: url
                   placeholderImage: nil
                   options: SDWebImageRetryFailed | SDWebImageHandleCookies
                   progress:  ^(NSInteger receivedSize, NSInteger expectedSize, NSURL* _Nullable targetURL) {
                      const auto eventEmitter = [self getEventEmitter];
                      if (eventEmitter) {
                        eventEmitter->onProgress(FasterImageViewEventEmitter::OnProgress{
                            .bytesWritten = static_cast<int>(receivedSize),
                            .bytesExpected = static_cast<int>(expectedSize)
                        });
                      }
                  }
                   completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
                      const auto eventEmitter = [self getEventEmitter];
                      if(image == nil && eventEmitter) {
                          eventEmitter->onError({});
                      }
                      else {
                          if(eventEmitter) {
                              eventEmitter->onLoadEnd({
                                  .width = image.size.width,
                                  .height = image.size.height
                              });
                          }
                          if([tintColor length] != 0) {
                              UIColor *color = [Utils hexStringToColor: tintColor];
                              UIImage *newImage = [Utils getImageWithTintColor:image :color];
                              self-> _imageView.image = newImage;
                          }
                      }
                  }
                   
                  ];
          }
           else if(isBase64) {
               [_imageView sd_setImageWithURL: url];
           }
           else if([stringURL containsString:@"/"]) {
             UIImage *image = [UIImage imageWithContentsOfFile: stringURL];
             self -> _imageView.image = image;
             if([tintColor length] > 0) {
               UIColor *color = [Utils hexStringToColor: tintColor];
               _imageView.tintColor = color;
             }
           }
           else if([stringURL containsString:@"sf:"]) {
             NSString *sfString = [stringURL substringFromIndex: 3];
             UIImage *image = [UIImage systemImageNamed: sfString];
             self -> _imageView.image = image;
             if([tintColor length] > 0) {
               UIColor *color = [Utils hexStringToColor: tintColor];
               _imageView.tintColor = color;
             }
           }
          else {
              if([tintColor length] == 0) {
                  _imageView.image = [UIImage imageNamed: stringURL];
              }
              else {
                  UIImage *image = [UIImage imageNamed: stringURL];
                  UIColor *color = [Utils hexStringToColor: tintColor];
                  UIImage *newImage = [Utils getImageWithTintColor:image :color];
                  _imageView.image = newImage;
              }
          }
          
          if([resizeMode length] > 0) {
              _imageView.contentMode = [Utils getUIImageContentMode: resizeMode];
          }
          else {
              _imageView.contentMode = UIViewContentModeScaleAspectFill;
          }
          
      }
      if (oldViewProps.radius != newViewProps.radius) {
          _imageView.layer.cornerRadius = newViewProps.radius;
      }
    
    [super updateProps:props oldProps:oldProps];
}

Class<RCTComponentViewProtocol> FasterImageViewCls(void)
{
    return FasterImageView.class;
}

- hexStringToColor:(NSString *)stringToConvert
{
    NSString *noHashString = [stringToConvert stringByReplacingOccurrencesOfString:@"#" withString:@""];
    NSScanner *stringScanner = [NSScanner scannerWithString:noHashString];

    unsigned hex;
    if (![stringScanner scanHexInt:&hex]) return nil;
    int r = (hex >> 16) & 0xFF;
    int g = (hex >> 8) & 0xFF;
    int b = (hex) & 0xFF;

    return [UIColor colorWithRed:r / 255.0f green:g / 255.0f blue:b / 255.0f alpha:1.0f];
}

- (std::shared_ptr<const FasterImageViewEventEmitter>)getEventEmitter
{
 if (!self->_eventEmitter) {
   return nullptr;
 }

 assert(std::dynamic_pointer_cast<FasterImageViewEventEmitter const>(self->_eventEmitter));
 return std::static_pointer_cast<FasterImageViewEventEmitter const>(self->_eventEmitter);
}

@end