package com.thatgravyboat.skyblockhud;

import java.awt.*;

public class SpecialColour {

  public static String special(int chromaSpeed, int alpha, int rgb) {
    return special(
      chromaSpeed,
      alpha,
      (rgb & 0xFF0000) >> 16,
      (rgb & 0x00FF00) >> 8,
      (rgb & 0x0000FF)
    );
  }

  private static final int RADIX = 10;

  public static String special(
    int chromaSpeed,
    int alpha,
    int r,
    int g,
    int b
  ) {
    StringBuilder sb = new StringBuilder();
    sb.append(Integer.toString(chromaSpeed, RADIX)).append(":");
    sb.append(Integer.toString(alpha, RADIX)).append(":");
    sb.append(Integer.toString(r, RADIX)).append(":");
    sb.append(Integer.toString(g, RADIX)).append(":");
    sb.append(Integer.toString(b, RADIX));
    return sb.toString();
  }

  private static int[] decompose(String csv) {
    String[] split = csv.split(":");

    int[] arr = new int[split.length];

    for (int i = 0; i < split.length; i++) {
      arr[i] = Integer.parseInt(split[split.length - 1 - i], RADIX);
    }
    return arr;
  }

  public static int specialToSimpleRGB(String special) {
    int[] d = decompose(special);
    int r = d[2];
    int g = d[1];
    int b = d[0];
    int a = d[3];
    int chr = d[4];

    return (a & 0xFF) << 24 | (r & 0xFF) << 16 | (g & 0xFF) << 8 | (b & 0xFF);
  }

  public static int getSpeed(String special) {
    return decompose(special)[4];
  }

  public static float getSecondsForSpeed(int speed) {
    return (
      (255 - speed) /
      254f *
      (MAX_CHROMA_SECS - MIN_CHROMA_SECS) +
      MIN_CHROMA_SECS
    );
  }

  private static final int MIN_CHROMA_SECS = 1;
  private static final int MAX_CHROMA_SECS = 60;

  public static long startTime = -1;

  public static int specialToChromaRGB(String special) {
    if (startTime < 0) startTime = System.currentTimeMillis();

    int[] d = decompose(special);
    int chr = d[4];
    int a = d[3];
    int r = d[2];
    int g = d[1];
    int b = d[0];

    float[] hsv = Color.RGBtoHSB(r, g, b, null);

    if (chr > 0) {
      float seconds = getSecondsForSpeed(chr);
      hsv[0] += (System.currentTimeMillis() - startTime) / 1000f / seconds;
      hsv[0] %= 1;
      if (hsv[0] < 0) hsv[0] += 1;
    }

    return (
      (a & 0xFF) << 24 | (Color.HSBtoRGB(hsv[0], hsv[1], hsv[2]) & 0x00FFFFFF)
    );
  }

  public static int rotateHue(int argb, int degrees) {
    int a = (argb >> 24) & 0xFF;
    int r = (argb >> 16) & 0xFF;
    int g = (argb >> 8) & 0xFF;
    int b = (argb) & 0xFF;

    float[] hsv = Color.RGBtoHSB(r, g, b, null);

    hsv[0] += degrees / 360f;
    hsv[0] %= 1;

    return (
      (a & 0xFF) << 24 | (Color.HSBtoRGB(hsv[0], hsv[1], hsv[2]) & 0x00FFFFFF)
    );
  }
}