package cn.citycraft.GsonAgent;

import java.io.Reader;
import java.io.Writer;

import cn.citycraft.GsonAgent.api.Gson;
import cn.citycraft.GsonAgent.api.JsonArray;
import cn.citycraft.GsonAgent.api.JsonNull;
import cn.citycraft.GsonAgent.api.JsonObject;
import cn.citycraft.GsonAgent.api.JsonParser;
import cn.citycraft.GsonAgent.api.JsonPrimitive;
import cn.citycraft.GsonAgent.api.TypeAdapter;
import cn.citycraft.GsonAgent.api.stream.JsonReader;
import cn.citycraft.GsonAgent.api.stream.JsonWriter;
import cn.citycraft.GsonAgent.api.utils.Utils;

/**
 * Minecraft Gson代理类(用于兼容1.7-1.8Gson类库)
 * 复制修改于曲尘的Gson
 *
 * @since 2016年1月5日 下午12:51:30
 * @author 喵♂呜,曲尘
 */
@SuppressWarnings({ "unchecked", "rawtypes" })
public class GsonAgent {
	public static boolean newVersion = false;
	private static String internalPackageName;
	private static Class TypeAdapter;

	static {
		internalPackageName = "cn.citycraft.PluginHelper.gsonagent.";
		try {
			Thread.currentThread().getContextClassLoader().loadClass("com.google.gson.Gson");
			newVersion = true;
			internalPackageName += "normal.";
		} catch (final Exception | Error e) {
			internalPackageName += "nms.";
		}
		try {
			TypeAdapter = getInternalClass("bind.TypeAdapter");
		} catch (final Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 初始化GsonAgent
	 *
	 * @return 根据新老版本获得不同的实例
	 */
	public static Gson newGson() {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.GsonHandle();
		}
		return new cn.citycraft.GsonAgent.nms.GsonHandle();
	}

	public static JsonArray newJsonArray() {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.JsonArrayHandle();
		}
		return new cn.citycraft.GsonAgent.nms.JsonArrayHandle();
	}

	public static JsonNull newJsonNull() {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.JsonNullHandle();
		}
		return new cn.citycraft.GsonAgent.nms.JsonNullHandle();
	}

	public static JsonObject newJsonObject() {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.JsonObjectHandle();
		}
		return new cn.citycraft.GsonAgent.nms.JsonObjectHandle();
	}

	public static JsonParser newJsonParser() {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.JsonParserHandle();
		}
		return new cn.citycraft.GsonAgent.normal.JsonParserHandle();
	}

	public static JsonPrimitive newJsonPrimitive(final Boolean value) {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.JsonPrimitiveHandle(value);
		}
		return new cn.citycraft.GsonAgent.nms.JsonPrimitiveHandle(value);
	}

	public static JsonPrimitive newJsonPrimitive(final Character value) {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.JsonPrimitiveHandle(value);
		}
		return new cn.citycraft.GsonAgent.nms.JsonPrimitiveHandle(value);
	}

	public static JsonPrimitive newJsonPrimitive(final Number value) {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.JsonPrimitiveHandle(value);
		}
		return new cn.citycraft.GsonAgent.nms.JsonPrimitiveHandle(value);
	}

	public static JsonPrimitive newJsonPrimitive(final String value) {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.JsonPrimitiveHandle(value);
		}
		return new cn.citycraft.GsonAgent.nms.JsonPrimitiveHandle(value);
	}

	public static JsonReader newJsonReader(final Reader in) {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.stream.JsonReaderHandle(in);
		}
		return new cn.citycraft.GsonAgent.nms.stream.JsonReaderHandle(in);
	}

	public static JsonWriter newJsonWriter(final Writer out) {
		if (newVersion) {
			return new cn.citycraft.GsonAgent.normal.stream.JsonWriterHandle(out);
		}
		return new cn.citycraft.GsonAgent.nms.stream.JsonWriterHandle(out);
	}

	public static TypeAdapter newTypeAdapter() {
		return (TypeAdapter) Utils.newInstance(TypeAdapter);
	}

	private static Class<?> getInternalClass(final String className) throws ClassNotFoundException {
		return Class.forName(internalPackageName + className + "Handle");
	}
}