/*
 * 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 <Foundation/Foundation.h>

#import <React/RCTInvalidating.h>

@protocol RCTBridgeMethod;
@protocol RCTBridgeModule;
@class RCTBridge;

typedef id<RCTBridgeModule> (^RCTBridgeModuleProvider)(void);

@interface RCTModuleData : NSObject <RCTInvalidating>

- (instancetype)initWithModuleClass:(Class)moduleClass bridge:(RCTBridge *)bridge;

- (instancetype)initWithModuleClass:(Class)moduleClass
                     moduleProvider:(RCTBridgeModuleProvider)moduleProvider
                             bridge:(RCTBridge *)bridge NS_DESIGNATED_INITIALIZER;

- (instancetype)initWithModuleInstance:(id<RCTBridgeModule>)instance
                                bridge:(RCTBridge *)bridge NS_DESIGNATED_INITIALIZER;

/**
 * Calls `constantsToExport` on the module and stores the result. Note that
 * this will init the module if it has not already been created. This method
 * can be called on any thread, but may block the main thread briefly if the
 * module implements `constantsToExport`.
 */
- (void)gatherConstants;

@property (nonatomic, strong, readonly) Class moduleClass;
@property (nonatomic, copy, readonly) NSString *name;

/**
 * Returns the module methods. Note that this will gather the methods the first
 * time it is called and then memoize the results.
 */
@property (nonatomic, copy, readonly) NSArray<id<RCTBridgeMethod>> *methods;

/**
 * Returns a map of the module methods. Note that this will gather the methods the first
 * time it is called and then memoize the results.
 */
@property (nonatomic, copy, readonly) NSDictionary<NSString *, id<RCTBridgeMethod>> *methodsByName;

/**
 * Returns the module's constants, if it exports any
 */
@property (nonatomic, copy, readonly) NSDictionary<NSString *, id> *exportedConstants;

/**
 * Returns YES if module instance has already been initialized; NO otherwise.
 */
@property (nonatomic, assign, readonly) BOOL hasInstance;

/**
 * Returns YES if module instance must be created on the main thread.
 */
@property (nonatomic, assign) BOOL requiresMainQueueSetup;

/**
 * Returns YES if module has constants to export.
 */
@property (nonatomic, assign, readonly) BOOL hasConstantsToExport;

/**
 * Returns the current module instance. Note that this will init the instance
 * if it has not already been created. To check if the module instance exists
 * without causing it to be created, use `hasInstance` instead.
 */
@property (nonatomic, strong, readwrite) id<RCTBridgeModule> instance;

/**
 * Returns the module method dispatch queue. Note that this will init both the
 * queue and the module itself if they have not already been created.
 */
@property (nonatomic, strong, readonly) dispatch_queue_t methodQueue;

/**
 * Whether the receiver has a valid `instance` which implements -batchDidComplete.
 */
@property (nonatomic, assign, readonly) BOOL implementsBatchDidComplete;

/**
 * Whether the receiver has a valid `instance` which implements
 * -partialBatchDidFlush.
 */
@property (nonatomic, assign, readonly) BOOL implementsPartialBatchDidFlush;

@end
