using System.Collections;
using System.Text;

namespace Geekbot.net.Lib
{
    public class EmojiConverter : IEmojiConverter
    {
        public string numberToEmoji(int number)
        {
            if (number == 10)
            {
                return "🔟";
            }
            var emojiMap = new string[]
            {
                ":zero:", 
                ":one:", 
                ":two:", 
                ":three:", 
                ":four:",
                ":five:",
                ":six:",
                ":seven:",
                ":eight:",
                ":nine:",
            };
            var numbers = number.ToString().ToCharArray();
            var returnString = new StringBuilder();
            foreach (var n in numbers)
            {
                returnString.Append(emojiMap[int.Parse(n.ToString())]);
            }
            return returnString.ToString();
        }

        public string textToEmoji(string text)
        {
            var emojiMap = new Hashtable
            {
                ['A'] = ":regional_indicator_a:",
                ['B'] = ":b:",
                ['C'] = ":regional_indicator_c:",
                ['D'] = ":regional_indicator_d:",
                ['E'] = ":regional_indicator_e:",
                ['F'] = ":regional_indicator_f:",
                ['G'] = ":regional_indicator_g:",
                ['H'] = ":regional_indicator_h:",
                ['I'] = ":regional_indicator_i:",
                ['J'] = ":regional_indicator_j:",
                ['K'] = ":regional_indicator_k:",
                ['L'] = ":regional_indicator_l:",
                ['M'] = ":regional_indicator_m:",
                ['N'] = ":regional_indicator_n:",
                ['O'] = ":regional_indicator_o:",
                ['P'] = ":regional_indicator_p:",
                ['Q'] = ":regional_indicator_q:",
                ['R'] = ":regional_indicator_r:",
                ['S'] = ":regional_indicator_s:",
                ['T'] = ":regional_indicator_t:",
                ['U'] = ":regional_indicator_u:",
                ['V'] = ":regional_indicator_v:",
                ['W'] = ":regional_indicator_w:",
                ['X'] = ":regional_indicator_x:",
                ['Y'] = ":regional_indicator_y:",
                ['Z'] = ":regional_indicator_z:",
                ['!'] = ":exclamation:",
                ['?'] = ":question:",
                ['#'] = ":hash:",
                ['*'] = ":star2:",
                ['+'] = ":heavy_plus_sign:",
                ['0'] = ":zero:",
                ['1'] = ":one:",
                ['2'] = ":two:",
                ['3'] = ":three:",
                ['4'] = ":four:",
                ['5'] = ":five:",
                ['6'] = ":six:",
                ['7'] = ":seven:",
                ['8'] = ":eight:",
                ['9'] = ":nine:",
                [' '] = "  "
            };
            var letters = text.ToUpper().ToCharArray();
            var returnString = new StringBuilder();
            foreach (var n in letters)
            {
                var emoji = emojiMap[n] ?? n;
                returnString.Append(emoji);
            }
            return returnString.ToString();
        }
    }
    
    public interface IEmojiConverter
    {
        string numberToEmoji(int number);
        string textToEmoji(string text);
    }
}