using Maki.Rest;
using Maki.Structures.Guilds;
using Maki.Structures.Rest;
using Maki.Structures.Roles;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Maki
{
    public class DiscordServer
    {
        public readonly ulong Id;
        private readonly Discord client;

        public string Name { get; internal set; }
        public ulong OwnerId { get; internal set; }
        public DateTime Created { get; internal set; }
        internal string IconHash;

        public IEnumerable<DiscordMember> Members => client.MemberManager.Server(this);
        public DiscordMember Owner => Members.Where(x => x.User.Id == OwnerId).FirstOrDefault();
        public DiscordMember Me => Members.Where(x => x.User == client.Me).FirstOrDefault();

        public IEnumerable<DiscordChannel> Channels => client.ChannelManager.Server(this);
        public IEnumerable<DiscordChannel> TextChannels => Channels.Where(x => x.Type == DiscordChannelType.Text);
        public IEnumerable<DiscordChannel> VoiceChannels => Channels.Where(x => x.Type == DiscordChannelType.Voice);

        public IEnumerable<DiscordRole> Roles => client.RoleManager.Server(this);

        public string Icon(string ext = "png", int size = 128) => RestEndpoints.CDN_URL + $@"/icons/{Id}/{IconHash}.{ext}?size={size}";

        internal DiscordServer(Discord discord, Guild guild)
        {
            client = discord;
            Id = guild.Id;
            Name = guild.Name;
            Created = guild.Created ?? DateTime.MinValue;
            OwnerId = guild.OwnerId ?? ulong.MinValue;
            IconHash = guild.IconHash;
        }

        public DiscordRole CreateRole(string name = null, DiscordPermission perms = DiscordPermission.None, DiscordColour colour = null, bool hoist = false, bool mentionable = false)
        {
            Role? roleStruct;

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

                if (wr.Status != 200 || wr.ResponseString.Length < 1)
                    throw new DiscordException("Failed to create role");

                roleStruct = wr.ResponseJson<Role>();
            }
            
            if (!roleStruct.HasValue)
                throw new DiscordException("Empty response?");

            DiscordRole role = client.RoleManager.Id(roleStruct.Value.Id);
            //Debug.Assert(role != null, "role is null");

            if (role == null)
            {
                role = new DiscordRole(client, roleStruct.Value, this);
                client.RoleManager.Add(role);
            }

            return role;
        }
    }
}