using Maki.Rest;
using Maki.Structures.Rest;
using Maki.Structures.Roles;
using System;

namespace Maki
{
    public class DiscordRole
    {
        public readonly ulong Id;
        public readonly DiscordServer Server;
        public readonly DiscordColour Colour;
        private readonly Discord client;

        public string Name { get; internal set; }
        public DiscordPermission Perms { get; internal set; }
        public bool IsHoisted { get; internal set; }
        public bool IsMentionable { get; internal set; }
        public int Position { get; internal set; }

        public override string ToString() => $@"<@&{Id}>";

        internal DiscordRole(Discord discord, Role role, DiscordServer server)
        {
            client = discord;
            Id = role.Id;
            Name = role.Name;
            Perms = (DiscordPermission)role.Permissions;
            IsHoisted = role.IsHoisted == true;
            IsMentionable = role.IsMentionable == true;
            Position = role.Position ?? 0;
            Server = server;
            Colour = new DiscordColour(role.Colour ?? int.MinValue);
        }

        public void Delete()
        {
            using (WebRequest wr = new WebRequest(HttpMethod.DELETE, RestEndpoints.GuildRole(Server.Id, Id)))
            {
                wr.Perform();

                if (wr.Status != 204)
                    throw new DiscordException($"Failed to delete role {Id} in guild {Server.Id}");
            }
        }

        public void Edit(string name = null, DiscordPermission? perms = null, DiscordColour colour = null, bool? hoist = null, bool? mentionable = null)
        {
            Role? role;

            using (WebRequest wr = new WebRequest(HttpMethod.PATCH, RestEndpoints.GuildRole(Server.Id, Id)))
            {
                wr.AddJson(new RoleCreate
                {
                    Name = name ?? Name,
                    Perms = perms ?? Perms,
                    Colour = colour == null ? 0 : colour.Raw,
                    Hoist = hoist ?? IsHoisted,
                    Mentionable = mentionable ?? IsMentionable
                });
                wr.Perform();

                if (wr.Status != 200 || wr.Response.Length < 1)
                    // TODO: elaborate
                    throw new DiscordException("Failed to edit role");

                role = wr.ResponseJson<Role>();
            }

            if (!role.HasValue)
                throw new DiscordException("Empty response?");

            Name = role.Value.Name;
            Perms = (DiscordPermission)role.Value.Permissions;
            Colour.Raw = role.Value.Colour ?? 0;
            IsHoisted = role.Value.IsHoisted == true;
            IsMentionable = role.Value.IsMentionable == true;
        }
    }
}