/*

    Copyright (C) 2015 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    Common superclass for the scenes in this demo. Manages an update loop for agents, and provides a mouse/touch tracking agent for use in some of the demo scenes.

 */

#import "AAPLGameScene.h"

#import "AAPLSeekScene.h"

#import "AAPLWanderScene.h"

#import "AAPLFleeScene.h"

#import "AAPLAvoidScene.h"

#import "AAPLSeparateScene.h"

#import "AAPLAlignScene.h"

#import "AAPLFlockScene.h"

#import "AAPLPathScene.h"

@interface AAPLGameScene ()

@property (nonatomic, readwrite) GKComponentSystem *agentSystem;

@property (nonatomic, readwrite) GKAgent2D *trackingAgent;

@property (nonatomic, readwrite) GKGoal *stopGoal;

@property NSTimeInterval lastUpdateTime;

@end

@implementation AAPLGameScene

+ (AAPLGameScene *)sceneWithType:(AAPLSceneType)sceneType size:(CGSize)size {

    Class sceneClass;

    switch (sceneType) {

        case AAPLSceneTypeSeek:

            sceneClass = [AAPLSeekScene class];

            break;

        case AAPLSceneTypeWander:

            sceneClass = [AAPLWanderScene class];

            break;

        case AAPLSceneTypeFlee:

            sceneClass = [AAPLFleeScene class];

            break;

        case AAPLSceneTypeAvoid:

            sceneClass = [AAPLAvoidScene class];

            break;

        case AAPLSceneTypeSeparate:

            sceneClass = [AAPLSeparateScene class];

            break;

        case AAPLSceneTypeAlign:

            sceneClass = [AAPLAlignScene class];

            break;

        case AAPLSceneTypeFlock:

            sceneClass = [AAPLFlockScene class];

            break;

        case AAPLSceneTypePath:

            sceneClass = [AAPLPathScene class];

            break;

        default:

            sceneClass = [AAPLGameScene class];

            break;

    }

    return [[sceneClass alloc] initWithSize:CGSizeMake(800, 600)];

}

- (NSString *)sceneName {

    return @"Default";

}

- (GKGoal *)stopGoal {

    if (_stopGoal == nil) {

        _stopGoal = [GKGoal goalToReachTargetSpeed:0];

    }

    return _stopGoal;

}

- (void)didMoveToView:(SKView *)view {

#if !TARGET_OS_IPHONE

    NSString *fontName = [NSFont systemFontOfSize:65].fontName;

    SKLabelNode *label = [SKLabelNode labelNodeWithFontNamed:fontName];

    label.text = self.sceneName;

    label.fontSize = 65;

    label.horizontalAlignmentMode = SKLabelHorizontalAlignmentModeLeft;

    label.verticalAlignmentMode = SKLabelVerticalAlignmentModeTop;

    label.position = CGPointMake(CGRectGetMinX(self.frame) + 10,

                                 CGRectGetMaxY(self.frame) - 46);

    [self addChild:label];

#endif

    self.agentSystem = [[GKComponentSystem alloc] initWithComponentClass:[GKAgent2D class]];

    self.trackingAgent = [[GKAgent2D alloc] init];

    self.trackingAgent.position = (vector_float2){CGRectGetMidX(self.frame), CGRectGetMidY(self.frame)};

}

- (void)update:(NSTimeInterval)currentTime {

    // Calculate delta since last update and pass along to the agent system.

    if (_lastUpdateTime == 0) {

        _lastUpdateTime = currentTime;

    }

    float delta = currentTime - _lastUpdateTime;

    _lastUpdateTime = currentTime;

    [self.agentSystem updateWithDeltaTime:delta];

}

#pragma mark - Input Handling

#if TARGET_OS_IPHONE

- (void)touchesBegan:(nonnull NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event {

    self.seeking = YES;

}

- (void)touchesCancelled:(nullable NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event {

    self.seeking = NO;

}

- (void)touchesEnded:(nonnull NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event {

    self.seeking = NO;

}

- (void)touchesMoved:(nonnull NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event {

    UITouch *touch = [touches anyObject];

    CGPoint position = [touch locationInNode:self];

    self.trackingAgent.position = (vector_float2){position.x, position.y};

}

#else

- (void)mouseDown:(nonnull NSEvent *)theEvent {

    self.seeking = YES;

}

- (void)mouseUp:(nonnull NSEvent *)theEvent {

    self.seeking = NO;

}

- (void)mouseDragged:(nonnull NSEvent *)theEvent {

    CGPoint position = [theEvent locationInNode:self];

    self.trackingAgent.position = (vector_float2){position.x, position.y};

}

#endif

@end