#import "MGLVectorSource_Private.h"

#import "MGLMapView_Private.h"
#import "MGLSource_Private.h"
#import "MGLTileSource_Private.h"
#import "NSURL+MGLAdditions.h"

#include <mbgl/style/sources/vector_source.hpp>

@interface MGLVectorSource ()

- (instancetype)initWithRawSource:(mbgl::style::VectorSource *)rawSource NS_DESIGNATED_INITIALIZER;

@property (nonatomic) mbgl::style::VectorSource *rawSource;

@end

@implementation MGLVectorSource {
    std::unique_ptr<mbgl::style::VectorSource> _pendingSource;
}

- (instancetype)initWithIdentifier:(NSString *)identifier configurationURL:(NSURL *)configurationURL {
    if (self = [super initWithIdentifier:identifier configurationURL:configurationURL]) {
        auto source = std::make_unique<mbgl::style::VectorSource>(identifier.UTF8String,
                                                                  configurationURL.mgl_URLByStandardizingScheme.absoluteString.UTF8String);
        _pendingSource = std::move(source);
        self.rawSource = _pendingSource.get();
    }
    return self;
}

- (instancetype)initWithIdentifier:(NSString *)identifier tileURLTemplates:(NS_ARRAY_OF(NSString *) *)tileURLTemplates options:(nullable NS_DICTIONARY_OF(MGLTileSourceOption, id) *)options {
    if (self = [super initWithIdentifier:identifier tileURLTemplates:tileURLTemplates options:options]) {
        mbgl::Tileset tileSet = MGLTileSetFromTileURLTemplates(tileURLTemplates, options);
        
        auto source = std::make_unique<mbgl::style::VectorSource>(identifier.UTF8String, tileSet);
        _pendingSource = std::move(source);
        self.rawSource = _pendingSource.get();
    }
    return self;
}

- (instancetype)initWithRawSource:(mbgl::style::VectorSource *)rawSource {
    return [super initWithRawSource:rawSource];
}

- (void)addToMapView:(MGLMapView *)mapView {
    if (_pendingSource == nullptr) {
        [NSException raise:@"MGLRedundantSourceException"
                    format:@"This instance %@ was already added to %@. Adding the same source instance " \
                            "to the style more than once is invalid.", self, mapView.style];
    }

    mapView.mbglMap->addSource(std::move(_pendingSource));
}

- (void)removeFromMapView:(MGLMapView *)mapView {
    auto removedSource = mapView.mbglMap->removeSource(self.identifier.UTF8String);

    _pendingSource = std::move(reinterpret_cast<std::unique_ptr<mbgl::style::VectorSource> &>(removedSource));
    self.rawSource = _pendingSource.get();
}

- (mbgl::style::VectorSource *)rawSource {
    return (mbgl::style::VectorSource *)super.rawSource;
}

- (void)setRawSource:(mbgl::style::VectorSource *)rawSource {
    super.rawSource = rawSource;
}

- (NSString *)attributionHTMLString {
    auto attribution = self.rawSource->getAttribution();
    return attribution ? @(attribution->c_str()) : nil;
}

@end