package com.negafinity.skinrestorer;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Map;
import java.util.UUID;

import org.apache.commons.codec.binary.Base64;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import com.google.common.collect.Maps;
import com.mojang.authlib.minecraft.MinecraftProfileTexture;
import com.mojang.authlib.minecraft.MinecraftProfileTexture.Type;

import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import net.minecraft.client.Minecraft;
import net.minecraft.client.entity.EntityPlayerSP;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.event.entity.EntityJoinWorldEvent;

public class PlayerJoinWorldListener
{
    private Map<UUID, ResourceLocation> resources = Maps.newHashMap();

    @SubscribeEvent
    public void onJoinWorld(EntityJoinWorldEvent event)
    {
        if (event.entity instanceof EntityPlayerSP)
        {
            EntityPlayerSP player = (EntityPlayerSP) event.entity;

            if (!resources.containsKey(player.getUniqueID()))
            {
                resources.put(player.getUniqueID(), Minecraft.getMinecraft().getSkinManager().loadSkin(new MinecraftProfileTexture(this.getPlayerTexture(player)), Type.SKIN));
            }

            player.onSkinAvailable(Type.SKIN, resources.get(player.getUniqueID()));
        }
    }

    private String getPlayerTexture(EntityPlayerSP player)
    {
        try
        {
            byte[] decoded = Base64.decodeBase64(this.getPlayerTextureBase64(player.getUniqueID()));
            String json = new String(decoded, "UTF-8");
            String url = new JSONObject(json).getJSONObject("textures").getJSONObject("SKIN").getString("url");
            return url;
        }
        catch (JSONException | IOException e)
        {
            e.printStackTrace();
        }

        return null;
    }

    private String getPlayerTextureBase64(UUID uuid) throws IOException, JSONException
    {
        String url = ("https://sessionserver.mojang.com/session/minecraft/profile/" + uuid.toString()).replaceAll("-", "");
        InputStream is = new URL(url).openStream();

        try
        {
            BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
            String jsonText = this.readAll(rd);
            JSONArray jsonArray = new JSONObject(jsonText).getJSONArray("properties");
            return jsonArray.getJSONObject(0).getString("value");
        }
        finally
        {
            is.close();
        }
    }

    private String readAll(Reader rd) throws IOException
    {
        StringBuilder sb = new StringBuilder();
        int cp;
        while ((cp = rd.read()) != -1)
        {
            sb.append((char) cp);
        }
        return sb.toString();
    }
}