using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using Discord;
using Discord.Commands;
using Nancy;
using Geekbot.net.Lib;

namespace Geekbot.net.WebApi
{
    public class HelpController : NancyModule
    {
        public HelpController()
        {
            Get("/v1/commands", args =>
            {
                var commands = getCommands().Result;

                var commandList = new List<CommandDto>();
                foreach (var cmd in commands.Commands)
                {
                    var cmdParamsObj = new List<CommandParamDto>();
                    foreach (var cmdParam in cmd.Parameters)
                    {
                        var singleParamObj = new CommandParamDto()
                        {
                            Summary = cmdParam.Summary,
                            Default = cmdParam?.DefaultValue?.ToString() ?? null,
                            Type = cmdParam?.Type?.ToString()
                        };
                        cmdParamsObj.Add(singleParamObj);
                    }
                    
                    var param = string.Join(", !", cmd.Aliases);
                    var cmdObj = new CommandDto()
                    {
                        Name = cmd.Name,
                        Summary = cmd.Summary,
                        Category = cmd.Remarks ?? CommandCategories.Uncategorized,
                        IsAdminCommand = (param.Contains("admin")),
                        Aliases = cmd.Aliases.ToArray(),
                        Params = cmdParamsObj
                    };
                    commandList.Add(cmdObj);
                }
                return Response.AsJson(commandList);
                
            });
        }

        private async Task<CommandService> getCommands()
        {
            var commands = new CommandService();
            await commands.AddModulesAsync(Assembly.GetEntryAssembly());
            return commands;
        }
    }

    public class CommandDto
    {
        public string Name { get; set; }
        public string Category { get; set; }
        public string Summary { get; set; }
        public bool IsAdminCommand { get; set; }
        public Array Aliases { get; set; }
        public List<CommandParamDto> Params { get; set; } 
    }

    public class CommandParamDto
    {
        public string Summary { get; set; }
        public string Default { get; set; }
        public string Type { get; set; }
    }
}