/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#import <FBReactNativeSpec/FBReactNativeSpec.h>
#import <React/RCTNativeAnimatedModule.h>
#import <React/RCTNativeAnimatedNodesManager.h>

#import <RCTTypeSafety/RCTConvertHelpers.h>

#import "RCTAnimationPlugins.h"

typedef void (^AnimatedOperation)(RCTNativeAnimatedNodesManager *nodesManager);

@interface RCTNativeAnimatedModule() <NativeAnimatedModuleSpec>
@end

@implementation RCTNativeAnimatedModule
{
  RCTNativeAnimatedNodesManager *_nodesManager;

  // Operations called after views have been updated.
  NSMutableArray<AnimatedOperation> *_operations;
  // Operations called before views have been updated.
  NSMutableArray<AnimatedOperation> *_preOperations;
  NSMutableDictionary<NSNumber *, NSNumber *> *_animIdIsManagedByFabric;
}

RCT_EXPORT_MODULE();

- (void)invalidate
{
  [_nodesManager stopAnimationLoop];
  [self.bridge.eventDispatcher removeDispatchObserver:self];
  [self.bridge.uiManager.observerCoordinator removeObserver:self];
  [self.bridge.surfacePresenter removeObserver:self];
}

- (dispatch_queue_t)methodQueue
{
  // This module needs to be on the same queue as the UIManager to avoid
  // having to lock `_operations` and `_preOperations` since `uiManagerWillPerformMounting`
  // will be called from that queue.
  return RCTGetUIManagerQueue();
}

- (void)setBridge:(RCTBridge *)bridge
{
  [super setBridge:bridge];

  _nodesManager = [[RCTNativeAnimatedNodesManager alloc] initWithBridge:self.bridge];
  _operations = [NSMutableArray new];
  _preOperations = [NSMutableArray new];
  _animIdIsManagedByFabric = [NSMutableDictionary new];

  [bridge.eventDispatcher addDispatchObserver:self];
  [bridge.uiManager.observerCoordinator addObserver:self];
  [bridge.surfacePresenter addObserver:self];
}

#pragma mark -- API

RCT_EXPORT_METHOD(createAnimatedNode:(double)tag
                  config:(NSDictionary<NSString *, id> *)config)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager createAnimatedNode:[NSNumber numberWithDouble:tag] config:config];
  }];
}

RCT_EXPORT_METHOD(connectAnimatedNodes:(double)parentTag
                  childTag:(double)childTag)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager connectAnimatedNodes:[NSNumber numberWithDouble:parentTag] childTag:[NSNumber numberWithDouble:childTag]];
  }];
}

RCT_EXPORT_METHOD(disconnectAnimatedNodes:(double)parentTag
                  childTag:(double)childTag)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager disconnectAnimatedNodes:[NSNumber numberWithDouble:parentTag] childTag:[NSNumber numberWithDouble:childTag]];
  }];
}

RCT_EXPORT_METHOD(startAnimatingNode:(double)animationId
                  nodeTag:(double)nodeTag
                  config:(NSDictionary<NSString *, id> *)config
                  endCallback:(RCTResponseSenderBlock)callBack)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager startAnimatingNode:[NSNumber numberWithDouble:animationId] nodeTag:[NSNumber numberWithDouble:nodeTag] config:config endCallback:callBack];
  }];

  RCTExecuteOnMainQueue(^{
    if (![self->_nodesManager isNodeManagedByFabric:[NSNumber numberWithDouble:nodeTag]]) {
      return;
    }

    RCTExecuteOnUIManagerQueue(^{
      self->_animIdIsManagedByFabric[[NSNumber numberWithDouble:animationId]] = @YES;
      [self flushOperationQueues];
    });
  });
}

RCT_EXPORT_METHOD(stopAnimation:(double)animationId)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager stopAnimation:[NSNumber numberWithDouble:animationId]];
  }];
  if ([_animIdIsManagedByFabric[[NSNumber numberWithDouble:animationId]] boolValue]) {
    [self flushOperationQueues];
  }
}

RCT_EXPORT_METHOD(setAnimatedNodeValue:(double)nodeTag
                  value:(double)value)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager setAnimatedNodeValue:[NSNumber numberWithDouble:nodeTag] value:[NSNumber numberWithDouble:value]];
  }];
}

RCT_EXPORT_METHOD(setAnimatedNodeOffset:(double)nodeTag
                  offset:(double)offset)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager setAnimatedNodeOffset:[NSNumber numberWithDouble:nodeTag] offset:[NSNumber numberWithDouble:offset]];
  }];
}

RCT_EXPORT_METHOD(flattenAnimatedNodeOffset:(double)nodeTag)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager flattenAnimatedNodeOffset:[NSNumber numberWithDouble:nodeTag]];
  }];
}

RCT_EXPORT_METHOD(extractAnimatedNodeOffset:(double)nodeTag)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager extractAnimatedNodeOffset:[NSNumber numberWithDouble:nodeTag]];
  }];
}

RCT_EXPORT_METHOD(connectAnimatedNodeToView:(double)nodeTag
                  viewTag:(double)viewTag)
{
  NSString *viewName = [self.bridge.uiManager viewNameForReactTag:[NSNumber numberWithDouble:viewTag]];
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager connectAnimatedNodeToView:[NSNumber numberWithDouble:nodeTag] viewTag:[NSNumber numberWithDouble:viewTag] viewName:viewName];
  }];
}

RCT_EXPORT_METHOD(disconnectAnimatedNodeFromView:(double)nodeTag
                  viewTag:(double)viewTag)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager disconnectAnimatedNodeFromView:[NSNumber numberWithDouble:nodeTag] viewTag:[NSNumber numberWithDouble:viewTag]];
  }];
}

RCT_EXPORT_METHOD(restoreDefaultValues:(double)nodeTag)
{
  [self addPreOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager restoreDefaultValues:[NSNumber numberWithDouble:nodeTag]];
  }];
}

RCT_EXPORT_METHOD(dropAnimatedNode:(double)tag)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager dropAnimatedNode:[NSNumber numberWithDouble:tag]];
  }];
}

RCT_EXPORT_METHOD(startListeningToAnimatedNodeValue:(double)tag)
{
  __weak id<RCTValueAnimatedNodeObserver> valueObserver = self;
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager startListeningToAnimatedNodeValue:[NSNumber numberWithDouble:tag] valueObserver:valueObserver];
  }];
}

RCT_EXPORT_METHOD(stopListeningToAnimatedNodeValue:(double)tag)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager stopListeningToAnimatedNodeValue:[NSNumber numberWithDouble:tag]];
  }];
}

RCT_EXPORT_METHOD(addAnimatedEventToView:(double)viewTag
                  eventName:(nonnull NSString *)eventName
                  eventMapping:(JS::NativeAnimatedModule::EventMapping &)eventMapping)
{
  NSMutableDictionary *eventMappingDict = [NSMutableDictionary new];
  eventMappingDict[@"nativeEventPath"] = RCTConvertVecToArray(eventMapping.nativeEventPath());

  if (eventMapping.animatedValueTag()) {
    eventMappingDict[@"animatedValueTag"] = @(*eventMapping.animatedValueTag());
  }

  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager addAnimatedEventToView:[NSNumber numberWithDouble:viewTag] eventName:eventName eventMapping:eventMappingDict];
  }];
}

RCT_EXPORT_METHOD(removeAnimatedEventFromView:(double)viewTag
                  eventName:(nonnull NSString *)eventName
            animatedNodeTag:(double)animatedNodeTag)
{
  [self addOperationBlock:^(RCTNativeAnimatedNodesManager *nodesManager) {
    [nodesManager removeAnimatedEventFromView:[NSNumber numberWithDouble:viewTag] eventName:eventName animatedNodeTag:[NSNumber numberWithDouble:animatedNodeTag]];
  }];
}

#pragma mark -- Batch handling

- (void)addOperationBlock:(AnimatedOperation)operation
{
  [_operations addObject:operation];
}

- (void)addPreOperationBlock:(AnimatedOperation)operation
{
  [_preOperations addObject:operation];
}

- (void)flushOperationQueues
{
  if (_preOperations.count == 0 && _operations.count == 0) {
    return;
  }
  NSArray<AnimatedOperation> *preOperations = _preOperations;
  NSArray<AnimatedOperation> *operations = _operations;
  _preOperations = [NSMutableArray new];
  _operations = [NSMutableArray new];


  RCTExecuteOnMainQueue(^{
    for (AnimatedOperation operation in preOperations) {
      operation(self->_nodesManager);
    }
    for (AnimatedOperation operation in operations) {
      operation(self->_nodesManager);
    }
    [self->_nodesManager updateAnimations];
  });
}

#pragma mark - RCTSurfacePresenterObserver

- (void)willMountComponentsWithRootTag:(NSInteger)rootTag
{
  RCTAssertMainQueue();
  RCTExecuteOnUIManagerQueue(^{
    NSArray<AnimatedOperation> *preOperations = self->_preOperations;
    self->_preOperations = [NSMutableArray new];

    RCTExecuteOnMainQueue(^{
      for (AnimatedOperation preOperation in preOperations) {
        preOperation(self->_nodesManager);
      }
    });
  });
}

- (void)didMountComponentsWithRootTag:(NSInteger)rootTag
{
  RCTAssertMainQueue();
  RCTExecuteOnUIManagerQueue(^{
    NSArray<AnimatedOperation> *operations = self->_operations;
    self->_operations = [NSMutableArray new];

    RCTExecuteOnMainQueue(^{
      for (AnimatedOperation operation in operations) {
        operation(self->_nodesManager);
      }
    });
  });
}

#pragma mark - RCTUIManagerObserver

- (void)uiManagerWillPerformMounting:(RCTUIManager *)uiManager
{
  if (_preOperations.count == 0 && _operations.count == 0) {
    return;
  }

  NSArray<AnimatedOperation> *preOperations = _preOperations;
  NSArray<AnimatedOperation> *operations = _operations;
  _preOperations = [NSMutableArray new];
  _operations = [NSMutableArray new];

  [uiManager prependUIBlock:^(__unused RCTUIManager *manager, __unused NSDictionary<NSNumber *, UIView *> *viewRegistry) {
    for (AnimatedOperation operation in preOperations) {
      operation(self->_nodesManager);
    }
  }];

  [uiManager addUIBlock:^(__unused RCTUIManager *manager, __unused NSDictionary<NSNumber *, UIView *> *viewRegistry) {
    for (AnimatedOperation operation in operations) {
      operation(self->_nodesManager);
    }

    [self->_nodesManager updateAnimations];
  }];
}

#pragma mark -- Events

- (NSArray<NSString *> *)supportedEvents
{
  return @[@"onAnimatedValueUpdate"];
}

- (void)animatedNode:(RCTValueAnimatedNode *)node didUpdateValue:(CGFloat)value
{
  [self sendEventWithName:@"onAnimatedValueUpdate"
                     body:@{@"tag": node.nodeTag, @"value": @(value)}];
}

- (void)eventDispatcherWillDispatchEvent:(id<RCTEvent>)event
{
  // Events can be dispatched from any queue so we have to make sure handleAnimatedEvent
  // is run from the main queue.
  RCTExecuteOnMainQueue(^{
    [self->_nodesManager handleAnimatedEvent:event];
  });
}

- (std::shared_ptr<facebook::react::TurboModule>)
  getTurboModuleWithJsInvoker:(std::shared_ptr<facebook::react::CallInvoker>)jsInvoker
                nativeInvoker:(std::shared_ptr<facebook::react::CallInvoker>)nativeInvoker
                   perfLogger:(id<RCTTurboModulePerformanceLogger>)perfLogger
{
  return std::make_shared<facebook::react::NativeAnimatedModuleSpecJSI>(self, jsInvoker, nativeInvoker, perfLogger);
}

@end

Class RCTNativeAnimatedModuleCls(void) {
  return RCTNativeAnimatedModule.class;
}
