using System.Collections.Generic;
using System.Text;
using DeukBot4.MessageHandlers.Permissions;

namespace DeukBot4.MessageHandlers.CommandHandler
{
    public static class HelpCommandGenerator
    {
        public static string GenerateFullHelp(PermissionLevel level)
        {
            var dic = new Dictionary<string, Dictionary<string, string>>();
            foreach (var command in CommandHandler.Commands)
            {
                if (command.Value.Permission > level)
                    continue;
                if (!command.Value.HasHelp)
                    continue;
                if (!dic.TryGetValue(command.Value.CommandContainer.Name, out var entry))
                {
                    dic.Add(command.Value.CommandContainer.Name, new Dictionary<string, string>());
                    entry = dic[command.Value.CommandContainer.Name];
                }
                entry.Add(command.Value.Name, command.Value.ShortHelp);
            }
            var sb = new StringBuilder();
            foreach (var entry in dic)
            {
                sb.Append($"**{entry.Key}**\n");
                foreach (var cmd in entry.Value)
                {
                    sb.Append($"``{cmd.Key}`` - {cmd.Value}\n");
                }
            }

            return sb.ToString();
        }

        public static string GenerateSpecificHelp(string command, PermissionLevel level)
        {
            if (!CommandHandler.Commands.TryGetValue(command, out var cmd))
                return null;
            if (cmd.Permission > level)
                return null;
            if (!cmd.HasHelp)
                return null;

            return $"**{cmd.Name}** - *{cmd.LongHelp}*";
        }
    }
}