//
//  ViewController.m
//  StagBeetle
//
//  Created by Mizusima Yusuke on 2017/08/17.
//  Copyright © 2017 Mizusima Yusuke. All rights reserved.
//

#import "ViewController.h"
@import SpriteKit;

@interface ViewController ()
@property (nonatomic, weak) SKScene *scene;
@end

@implementation ViewController

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

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

- (void)createStag {
    UIColor *color = [UIColor colorWithHue:0.5 saturation:0.9 brightness:0.1 alpha:1] ;
    UIGraphicsBeginImageContextWithOptions(CGSizeMake(80, 80), NO, 0);
    [color set];
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    CGContextFillRect(ctx, CGRectMake(15, 0, 50, 28));
    CGContextFillRect(ctx, CGRectMake(15, 30, 50, 50));
    CGContextFillEllipseInRect(ctx, CGRectMake(10, 10, 10, 10));
    CGContextFillEllipseInRect(ctx, CGRectMake(60, 10, 10, 10));

    CGContextFillRect(ctx, CGRectMake(0, 35, 80, 5));
    CGContextFillRect(ctx, CGRectMake(0, 45, 80, 5));
    CGContextFillRect(ctx, CGRectMake(0, 60, 80, 5));

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

    SKTexture *texture = [SKTexture textureWithImage:img];
    SKSpriteNode *stag = [SKSpriteNode spriteNodeWithTexture:texture];
    stag.position = CGPointMake(100, 50);
    stag.zRotation = -M_PI * 0.3;
    stag.name = @"stag";
    [self.scene addChild:stag];

    for (int i=0; i<2; i++) {
        SKSpriteNode *jaw = [SKSpriteNode spriteNodeWithColor:color size:CGSizeMake(10, 50)];
        jaw.name = [NSString stringWithFormat:@"jaw%d", i];
        jaw.anchorPoint = CGPointMake(0.5, 0);
        jaw.position = CGPointMake(-20 + i * 40, 40);
        jaw.zRotation = i == 0 ? M_PI * 0.05 : -M_PI * 0.05;
        [stag addChild:jaw];
    }
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    SKNode *stag = [self.scene childNodeWithName:@"stag"];
    float w = stag.zRotation + M_PI * 0.5;
    SKAction *move = [SKAction moveBy:CGVectorMake(80 * cos(w), 80 * sin(w)) duration:1.0];
    [stag runAction:move];

    for (SKNode *child in stag.children) {
        if ([child.name hasPrefix:@"jaw"]) {
            int n = [[child.name componentsSeparatedByString:@"jaw"][1] intValue];
            SKAction *wait = [SKAction waitForDuration:1.0];
            SKAction *close = [SKAction rotateByAngle:(n == 1 ? M_PI * 0.15 : -M_PI * 0.15) duration:1.0];
            SKAction *open = [close reversedAction];
            [child runAction:[SKAction sequence:@[wait, close, open]]];
        }
    }
}

@end