import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;

import javax.imageio.ImageIO;
import javax.net.ssl.HttpsURLConnection;

import org.apache.commons.codec.binary.Base64;
import org.bukkit.ChatColor;
import org.bukkit.Color;

import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

// FaceAPI - Returns the face of players skin into ChatColors.
// Return-Type: Array of lines
// EXAMPLE USE:
// e.getPlayer().sendMessage(FaceAPI.playerFaceToChat("4566e69fc90748ee8d71d7ba5aa00d20"));
// Author: mastercake10

public class FaceAPI {
    static private JsonParser parser = new JsonParser();
    static private String API_PROFILE_LINK = "https://sessionserver.mojang.com/session/minecraft/profile/";

    static private int OFFSET_X = 8;
    static private int OFFSET_Y = 8;

    static private Color[] colors = {
            Color.fromRGB(0, 0, 0),
            Color.fromRGB(0, 0, 170),
            Color.fromRGB(0, 170, 0),
            Color.fromRGB(0, 170, 170),
            Color.fromRGB(170, 0, 0),
            Color.fromRGB(170, 0, 170),
            Color.fromRGB(255, 170, 0),
            Color.fromRGB(170, 170, 170),
            Color.fromRGB(85, 85, 85),
            Color.fromRGB(85, 85, 255),
            Color.fromRGB(85, 255, 85),
            Color.fromRGB(85, 255, 255),
            Color.fromRGB(255, 85, 85),
            Color.fromRGB(255, 85, 255),
            Color.fromRGB(255, 255, 85),
            Color.fromRGB(255, 255, 255)
        };

    public static String[] playerFaceToChat(String uuid){


        String json = getContent(API_PROFILE_LINK + uuid);
        JsonObject o = parser.parse(json).getAsJsonObject();
        String jsonBase64 = o.get("properties").getAsJsonArray().get(0).getAsJsonObject().get("value").getAsString();

        o = parser.parse(new String(Base64.decodeBase64(jsonBase64))).getAsJsonObject();
        String skinUrl = o.get("textures").getAsJsonObject().get("SKIN").getAsJsonObject().get("url").getAsString();

        BufferedImage bi = getImage(skinUrl);

        String[] result = new String[8];

        for(int x = OFFSET_X; x < OFFSET_X + 8; x++){
            for(int y = OFFSET_Y; y < OFFSET_Y + 8; y++){
                int clr=  bi.getRGB(x,y);
                ChatColor c = getClosestColor(clr);
                if(result[y - OFFSET_Y] == null) result[y - OFFSET_Y] = "";
                result[y - OFFSET_Y] += c.toString() + "⬛";
                System.out.println(result[y - OFFSET_X]);
            }
        }
        return result;
    }
    public static ChatColor getClosestColor(int clr){
        int red = (clr & 0x00ff0000) >> 16;
        int green = (clr & 0x0000ff00) >> 8;
        int blue = clr & 0x000000ff;
        int alpha = (clr>>24) & 0xff;

        if (alpha < 128) {
            return ChatColor.WHITE;
        }

        int index = 0;
        int best = -1;

        for (int i = 0; i < colors.length; i++) {
            double distance = getDistance(Color.fromRGB(red, green, blue), colors[i]);
            if (distance < best || best == -1) {
                best = (int) distance;
                index = i;
            }
        }

        return ChatColor.values()[index];
    }
    public static double getDistance(Color c1, Color c2) {
        double rmean = (c1.getRed() + c2.getRed()) / 2.0;

        double r = c1.getRed() - c2.getRed();
        double g = c1.getGreen() - c2.getGreen();
        int b = c1.getBlue() - c2.getBlue();

        double weightR = 2 + rmean / 256.0;
        double weightG = 4.0;
        double weightB = 2 + (255 - rmean) / 256.0;

        return weightR * r * r + weightG * g * g + weightB * b * b;
    }
    public static BufferedImage getImage(String link){
        try{
            URL url = new URL(link);

            return ImageIO.read(url);

        }catch(IOException e){
            e.printStackTrace();
        }
        return null;
    }
    public static String getContent(String link){
        try {
            URL url = new URL(link);
            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();

            BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));

            String inputLine;
            while ((inputLine = br.readLine()) != null) {
                    return inputLine;
            }
            br.close();

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}