package foundation.json;

import java.util.List;
import java.util.Set;

import org.json.JSONArray;
import org.json.JSONObject;

import foundation.util.Util;

public abstract class JSONReader implements Iterable<JSONReader>, IJSONProvider{

	protected String name;
	protected JType type;
	
	public abstract boolean isEmpty();
	
	public abstract boolean hasChildren();
	
	public abstract boolean has(String name);
	
	public abstract JType getType(String name);
	
	public abstract Object getValue();
	
	public abstract Object getValue(String name);
	
	public abstract Object getValue(String name, Object defaultValue);
	
	public abstract String getRawString(String name);
	
	public abstract String getString(String name);
	
	public abstract String getString(String name, String defaultValue);
	
	public abstract String getDecodeString(String name);
	
	public abstract String getDecodeString(String name, String defaultValue);
	
	public abstract Set<String> getStringSet();
	
	public abstract List<String> getStringList();
	
	public abstract Set<String> getStringSet(String name);
	
	public abstract List<String> getStringList(String name);
	
	public abstract Integer getInteger(Integer defaultValue);
	
	public abstract Integer getInteger(String name, Integer defaultValue);
	
	public abstract boolean getBoolean(boolean defaultValue);
	
	public abstract boolean getBoolean(String name, boolean defaultValue);
	
	public abstract <T extends JSONReader> T getReader(String name, JType type); 
	
	public void put(String name, Object value) {
		if (value instanceof JSONReader) {
			putReader(name, (JSONReader)value);
			return;
		}
		
		JType type = JType.getInstance(value);
		
		if (JType.Array == type) {
			JArrayReader reader = new JArrayReader(name, (JSONArray)value);
			putReader(name, reader);
		}
		else if (JType.Object == type) {
			JObjectReader reader = new JObjectReader(name, (JSONObject)value);
			putReader(name, reader);
		}
		else {
			putValue(name, value);
		}
	}
	
	protected abstract void putReader(String name, JSONReader reader);
	
	protected abstract void putValue(String name, Object value);
	
	protected abstract void putValue(Object value);
	
	public String getName() {
		return name;
	}
	
	public JType getType() {
		return type;
	}

	public static JType readType(String content) {
		if (Util.isEmpty(content)) {
			return JType.Empty;
		}
		
		int max = content.length();
		
		for (int i = 0; i < max; i++) {
			char c = content.charAt(i);
			
			if (' ' == c) {
				continue;
			}
			else if ('{' == c) {
				return JType.Object;
			}
			else if ('[' == c) {
				return JType.Array;
			}
			else {
				return JType.Unknown;
			}
		}
		
		return JType.Unknown;
	}

	public void writeJSON(IJSONWriter writer) {
		if (JType.Array == type) {
			JSONArray jsonArray = (JSONArray)getValue(name);
			writer.beginArray(name);
			for(Object json: jsonArray) {
				JSONReader jsonReader = (JSONReader)json;
				jsonReader.writeJSON(writer);
			}
			writer.endArray();
		}
		else if (JType.Object == type) {
			writer.beginObject(name);
			JSONReader jsonReader = (JSONReader)getValue(name);
			jsonReader.writeJSON(writer);
			writer.endObject();
		}
		else {
			writer.write(name, getString(name));
		}
	}
	
}