// Copyright 2013 The Flutter Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// This header is available in the Test module. Import via "@import image_picker_ios_ios.Test;"

#import "FIPViewProvider.h"
#import "FLTImagePickerPlugin.h"
#import "messages.g.h"

NS_ASSUME_NONNULL_BEGIN

/// The return handler used for all method calls, which internally adapts the provided result list
/// to return either a list or a single element depending on the original call.
typedef void (^FlutterResultAdapter)(NSArray<NSString *> *_Nullable, FlutterError *_Nullable);

/// A container class for context to use when handling a method call from the Dart side.
@interface FLTImagePickerMethodCallContext : NSObject

/// Initializes a new context that calls |result| on completion of the operation.
- (instancetype)initWithResult:(nonnull FlutterResultAdapter)result;

/// The callback to provide results to the Dart caller.
@property(nonatomic, copy, nonnull) FlutterResultAdapter result;

/// The maximum size to enforce on the results.
///
/// If nil, no resizing is done.
@property(nonatomic, strong, nullable) FLTMaxSize *maxSize;

/// The image quality to resample the results to.
///
/// If nil, no resampling is done.
@property(nonatomic, strong, nullable) NSNumber *imageQuality;

/// Maximum number of items to select. 0 indicates no maximum.
@property(nonatomic, assign) int maxItemCount;

/// Whether the image should be picked with full metadata (requires gallery permissions).
@property(nonatomic, assign) BOOL requestFullMetadata;

/// Maximum duration for videos. 0 indicates no maximum.
@property(nonatomic, assign) NSTimeInterval maxDuration;

/// Whether the picker should include images in the list.
@property(nonatomic, assign) BOOL includeImages;

/// Whether the picker should include videos in the list.
@property(nonatomic, assign) BOOL includeVideo;

@end

#pragma mark -

/// Methods exposed for unit testing.
@interface FLTImagePickerPlugin () <FLTImagePickerApi,
                                    UINavigationControllerDelegate,
                                    UIImagePickerControllerDelegate,
                                    PHPickerViewControllerDelegate,
                                    UIAdaptivePresentationControllerDelegate>

/// The context of the Flutter method call that is currently being handled, if any.
@property(strong, nonatomic, nullable) FLTImagePickerMethodCallContext *callContext;

- (instancetype)initWithViewProvider:(NSObject<FIPViewProvider> *)viewProvider;

/// Validates the provided paths list, then sends it via `callContext.result` as the result of the
/// original platform channel method call, clearing the in-progress call state.
///
/// @param pathList The paths to return. nil indicates a cancelled operation.
- (void)sendCallResultWithSavedPathList:(nullable NSArray *)pathList;

/// Tells the delegate that the user cancelled the pick operation.
///
/// Your delegate’s implementation of this method should dismiss the picker view
/// by calling the dismissModalViewControllerAnimated: method of the parent
/// view controller.
///
/// Implementation of this method is optional, but expected.
///
/// @param picker The controller object managing the image picker interface.
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;

/// Sets UIImagePickerController instances that will be used when a new
/// controller would normally be created. Each call to
/// createImagePickerController will remove the current first element from
/// the array.
///
/// Should be used for testing purposes only.
- (void)setImagePickerControllerOverrides:
    (NSArray<UIImagePickerController *> *)imagePickerControllers;

@end

NS_ASSUME_NONNULL_END