using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

namespace AnP.Utils{
    public class Color{
        
        public int red = 0x00;
        public int green = 0x00;
        public int blue = 0x00;
        public int alpha = 0xFF;

        public Color(string code){

            if(code.StartsWith("#")){

                code = code.Substring(1);

                if(code.Length == 3 || code.Length == 4)
                    code = string.Concat(code.Select(c => $"{c}{c}"));
                code = code.PadLeft(8, 'F');

                alpha = Convert.ToInt32(code.Substring(0, 2), 16);
                red = Convert.ToInt32(code.Substring(2, 2), 16);
                green = Convert.ToInt32(code.Substring(4, 2), 16);
                blue = Convert.ToInt32(code.Substring(6, 2), 16);

            }else if(code.StartsWith("rgb")){
                
                string[] items = code.Substring(code.IndexOf("(") + 1, code.LastIndexOf(")") - code.IndexOf("(") - 1).Split(",");

                red = items.Length > 0 ? Convert.ToInt32(items[0]) : 0;
                green = items.Length > 1 ? Convert.ToInt32(items[1]) : 0;
                blue = items.Length > 2 ? Convert.ToInt32(items[2]) : 0;
                alpha = items.Length > 3 ? (
                    items[3].Contains(".") ? (int)(Convert.ToSingle(items[3]) * 0xFF) : 
                Convert.ToInt32(items[3])) : 0xFF;

            }

        }

        public Color(int color){
            alpha = 0xFF - ((color >> 24) & 0xFF);
            red = (color >> 16) & 0xFF;
            green = (color >> 8) & 0xFF;
            blue = color & 0xFF;
        }

        public Color(IEnumerable inputs, string type = "rgba"){

            object[] array = ((IEnumerable)inputs).Cast<object>().ToArray();

            if(type == "rgb" || type == "rgba" || true){
                red = array.Length > 0 ? (int)array[0] : 0;
                green = array.Length > 1 ? (int)array[1] : 0;
                blue = array.Length > 2 ? (int)array[2] : 0;
                alpha = array.Length > 3 ? (
                    Check.is_integer(array[3]) ? (int)array[3] : 
                    Check.is_float(array[3]) ? (int)((float)array[3] * 0xFF) : 
                0xFF) : 0xFF;
            }

        }

        public Color(Color color){
            red = color.red;
            green = color.green;
            blue = color.blue;
            alpha = color.alpha;
        }

        public string to_rgba(){
            return $"rgba({red}, {green}, {blue}, {(float)alpha / 0xFF:0.##})";
        }

        public string to_rgb(){
            return $"rgb({red}, {green}, {blue})";
        }

        public string to_hex(bool with_alpha = false){
            return $"#{(with_alpha ? $"{alpha:X2}" : "")}{red:X2}{green:X2}{blue:X2}";
        }

        public static Color mix(params object[] colors){
            if(colors.Length == 0)
                return new Color(0);

            Color _base;
            int l = colors.Length;

            if(Check.is_string(colors[0]))
                _base = new Color((string)colors[0]);
            else if(Check.is_integer(colors[0]))
                _base = new Color((int)colors[0]);
            else if(Check.is_array(colors[0]))
                _base = new Color((IEnumerable)colors[0]);
            else if(colors[0] is Color)
                _base = new Color((Color)colors[0]);
            else 
                return new Color(0);

            if(l != 1){
                
                for(int i = 1; i < l; i ++){

                    Color subcolor;

                    if(Check.is_string(colors[i]))
                        subcolor = new Color((string)colors[i]);
                    else if(Check.is_integer(colors[i]))
                        subcolor = new Color((int)colors[i]);
                    else if(Check.is_array(colors[i]))
                        subcolor = new Color((IEnumerable)colors[i]);
                    else if(colors[i] is Color)
                        subcolor = new Color((Color)colors[i]);
                    else 
                        continue;

                    _base.red += subcolor.red;
                    _base.green += subcolor.green;
                    _base.blue += subcolor.blue;
                    _base.alpha += subcolor.alpha;

                }

                _base.red /= l;
                _base.green /= l;
                _base.blue /= l;
                _base.alpha /= l;

            };

            return _base;

        }

    }
}