Theme.java

package greymerk.roguelike.theme;

import java.util.Random;

import com.google.gson.JsonObject;

public enum Theme {

	OAK, SPRUCE, CRYPT, MOSSY, MUDDY, NETHER, SANDSTONE, QUARTZ, BLING, CHECKER,
	RAINBOW, SNOW, JUNGLE, BRICK, DARKOAK, ICE, ENIKO, ENIKO2, ENIQUARTZ, ENIICE, TOWER,
	ETHO, CAVE, SEWER, ENDER, MINESHAFT, ETHOTOWER, PYRAMID, DARKHALL, TEMPLE, SANDSTONERED,
	HOUSE, GREY, PURPUR, HELL;
	
	public static ITheme getTheme(Theme type){
		
		ITheme theme;
		
		switch(type){
		case OAK: theme = new ThemeOak(); break;
		case SPRUCE: theme = new ThemeSpruce(); break;
		case CRYPT: theme = new ThemeCrypt(); break;
		case MOSSY: theme = new ThemeMossy(); break;
		case MUDDY: theme = new ThemeMuddy(); break;
		case NETHER: theme = new ThemeNether(); break;
		case SANDSTONE: theme = new ThemeSandstone(); break;
		case QUARTZ: theme = new ThemeQuartz(); break;
		case BLING: theme = new ThemeBling(); break;
		case CHECKER: theme = new ThemeChecker(); break;
		case RAINBOW: theme = new ThemeRainbow(); break;
		case SNOW: theme = new ThemeSnow(); break;
		case JUNGLE: theme = new ThemeJungle(); break;
		case BRICK: theme = new ThemeBrick(); break;
		case DARKOAK: theme = new ThemeDarkOak(); break;
		case ICE: theme = new ThemeIce(); break;
		case ENIKO: theme = new ThemeEniko(); break;
		case ENIKO2: theme = new ThemeEniko2(); break;
		case ENIQUARTZ: theme = new ThemeEniQuartz(); break;
		case ENIICE: theme = new ThemeEniIce(); break;
		case TOWER: theme = new ThemeTower(); break;
		case ETHO: theme = new ThemeEtho(); break;
		case CAVE: theme = new ThemeCave(); break;
		case SEWER: theme = new ThemeSewer(); break;
		case ENDER: theme = new ThemeEnder(); break;
		case MINESHAFT: theme = new ThemeMineShaft(); break;
		case ETHOTOWER: theme = new ThemeEthoTower(); break;
		case PYRAMID: theme = new ThemePyramid(); break;
		case DARKHALL: theme = new ThemeDarkHall(); break;
		case TEMPLE: theme = new ThemeTemple(); break;
		case SANDSTONERED: theme = new ThemeSandstoneRed(); break;
		case HOUSE: theme = new ThemeHouse(); break;
		case GREY: theme = new ThemeGrey(); break;
		case PURPUR: theme = new ThemePurpur(); break;
		case HELL: theme = new ThemeHell(); break;
		default: return null;
		}
		
		return theme;
	}
	
	public static ITheme create(JsonObject json) throws Exception{
				
		ITheme base = json.has("base")
			? Theme.getTheme(Theme.get(json.get("base").getAsString()))
			: null;
		
		BlockSet primary = null;
		BlockSet secondary = null;

		// primary blocks
		if(json.has("primary")){
			JsonObject data = json.get("primary").getAsJsonObject();		
			primary = new BlockSet(data, base != null ? base.getPrimary() : null);
		}
		
		// secondary blocks
		if(json.has("secondary")){
			JsonObject data = json.get("secondary").getAsJsonObject();		
			secondary = new BlockSet(data, base != null ? base.getSecondary() : null);
		}

		if(base == null){
			return new ThemeBase(primary, secondary);
		}
		
		return new ThemeBase((ThemeBase) base, primary, secondary);
	}
	
	public static ITheme create(ITheme toCopy){
		BlockSet primary = toCopy.getPrimary() != null ? new BlockSet(toCopy.getPrimary()) : null;
		BlockSet secondary = toCopy.getSecondary() != null ? new BlockSet(toCopy.getSecondary()) : null;
		return new ThemeBase(primary, secondary);
	}
	
	public static ITheme create(ITheme base, ITheme other){
		if(base == null && other == null){
			return null;
		}
		
		if(other == null && base != null){
			return create(base);
		}
		
		if(other != null && base == null){
			return create(other);
		}
		
		BlockSet primary = other.getPrimary() != null
				? new BlockSet(
						base.getPrimary() != null 
							? new BlockSet(base.getPrimary()) 
							: null,
						other.getPrimary()
						)
				: base.getPrimary() != null 
					? new BlockSet(base.getPrimary())
					: null;
		BlockSet secondary = other.getSecondary() != null
				? new BlockSet(
						base.getPrimary() != null 
							? new BlockSet(base.getPrimary()) 
							: null,
						other.getSecondary()
						)
				: base.getSecondary() != null
					? new BlockSet(base.getSecondary())
					: null;
		return new ThemeBase(primary, secondary);
	}
	
	public static Theme get(String name) throws Exception{
		if(!contains(name.toUpperCase())){
			throw new Exception("No such theme: " + name);
		}
		
		return valueOf(name.toUpperCase());
	}
	
	public static boolean contains(String name){
		for(Theme value : values()){
			if(value.toString().equals(name)) return true;
		}
		return false;
	}

	public static ITheme getRandom(Random rand) {
		return Theme.getTheme(Theme.values()[rand.nextInt(Theme.values().length)]);
	}
	
}