//
//  ViewController.m
//  hourglass
//
//  Created by MizushimaYusuke on 6/28/16.
//  Copyright © 2016 MizushimaYusuke. All rights reserved.
//

#import "ViewController.h"
@import SpriteKit;

@interface ViewController () <SKSceneDelegate>
@property (nonatomic ,weak) SKScene *scene;
@property (nonatomic) BOOL startHour;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setupScene];
    [self createHourglass];
    [self createStart];
}

- (void)setupScene {
    SKView *sv = [[SKView alloc] initWithFrame:self.view.bounds];
    SKScene *s = [SKScene sceneWithSize:sv.frame.size];
    s.delegate = self;
    [sv presentScene:s];
    [self.view addSubview:sv];
    self.scene = s;
}

- (void)createHourglass {
    CGPoint o = CGPointMake(50, 100);
    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:CGPointMake(o.x, o.y + 100)];
    [path addCurveToPoint:CGPointMake(o.x + 50, o.y + 70) controlPoint1:CGPointMake(o.x + 20, o.y + 100) controlPoint2:CGPointMake(o.x + 50, o.y + 100)];
    [path addCurveToPoint:CGPointMake(o.x + 5, o.y) controlPoint1:CGPointMake(o.x + 50, o.y + 40) controlPoint2:CGPointMake(o.x, o.y + 20)];
    [path addCurveToPoint:CGPointMake(o.x + 50, o.y - 70) controlPoint1:CGPointMake(o.x, o.y - 20) controlPoint2:CGPointMake(o.x + 50, o.y - 40)];
    [path addCurveToPoint:CGPointMake(o.x, o.y - 100) controlPoint1:CGPointMake(o.x + 50, o.y - 100) controlPoint2:CGPointMake(o.x + 20, o.y - 100)];
    [path addCurveToPoint:CGPointMake(o.x - 50, o.y - 70) controlPoint1:CGPointMake(o.x - 20, o.y - 100) controlPoint2:CGPointMake(o.x - 50, o.y - 100)];
    [path addCurveToPoint:CGPointMake(o.x - 5, o.y) controlPoint1:CGPointMake(o.x - 50, o.y - 40) controlPoint2:CGPointMake(o.x, o.y - 20)];
    [path addCurveToPoint:CGPointMake(o.x - 50, o.y + 70) controlPoint1:CGPointMake(o.x, o.y + 20) controlPoint2:CGPointMake(o.x - 50, o.y + 40)];
    [path addCurveToPoint:CGPointMake(o.x, o.y + 100) controlPoint1:CGPointMake(o.x - 50, o.y + 100) controlPoint2:CGPointMake(o.x - 20, o.y + 100)];
    path.lineWidth = 2;


    UIGraphicsBeginImageContextWithOptions(CGSizeMake(102, 202), false, 0);
    CGContextTranslateCTM(UIGraphicsGetCurrentContext(), 1, 1);
    [[UIColor whiteColor] set];
    [path stroke];

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    SKTexture *texture = [SKTexture textureWithImage:image];
    SKSpriteNode *n = [SKSpriteNode spriteNodeWithTexture:texture];
    n.name = @"glass";
    [self.scene addChild:n];

    n.position = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds));

    CGAffineTransform bt = CGAffineTransformMakeTranslation(-50, -100);
    UIBezierPath *bodyPath = [UIBezierPath bezierPathWithCGPath:CGPathCreateCopyByTransformingPath(path.CGPath, &bt)];

    n.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromPath:bodyPath.CGPath];
    n.physicsBody.pinned = YES;
}

- (void)createStart {
    SKLabelNode *start = [SKLabelNode labelNodeWithText:@"▲"];
    start.name = @"start";
    start.fontSize = 50;
    start.zRotation = -M_PI * 0.5;
    start.position = CGPointMake(CGRectGetMaxX(self.view.bounds) - 100, CGRectGetMidY(self.view.bounds) - 80);
    [self.scene addChild:start];

}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    CGPoint p = [[touches anyObject] locationInNode:self.scene];

    SKNode *hit = [self.scene nodeAtPoint:p];
    if ([hit.name isEqual:@"start"]) {
        self.startHour = YES;
        return;
    }

    for (int i=0; i<10; i++) {
        SKSpriteNode *n = [SKSpriteNode spriteNodeWithColor:[UIColor blueColor] size:CGSizeMake(5, 5)];
        n.position = p;
        [self.scene addChild:n];
        n.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:2.5];
        n.physicsBody.friction = 0;
    }
}

- (void)update:(NSTimeInterval)currentTime forScene:(SKScene *)scene {
    SKNode *glass = [self.scene childNodeWithName:@"glass"];
    if (self.startHour) {
        glass.physicsBody.angularVelocity = 0.5;
    } else {
        glass.physicsBody.angularVelocity = 0;
    }
}

@end