using DeluxeBackend.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System.ComponentModel.DataAnnotations;
using System.Numerics;
using DeluxeBackend.Models;
using System.Security.Claims;
using static DeluxeBackend.Enums;

namespace DeluxeBackend.Controllers.Api
{
    [Route("api/relationships")]
    [ApiController]
    public class RelationshipsController : ControllerBase//this is from KittyRec https://git.tabbycluster.net/KittyRec/KittyRec-Api/src/branch/main/Controllers/relationshipsController.cs
    {
        private readonly ILiteDbService db;
        private readonly IJwtService jwt;
        private readonly INotificationService ws;
        private readonly IMessageService messageService;

        public RelationshipsController(ILiteDbService _db, IJwtService _jwt, INotificationService _ws, IMessageService _messageService)
        {
            db = _db;
            jwt = _jwt;
            ws = _ws;
            messageService = _messageService;
        }

        private long? GetCurrentPlayerId()
        {
            string? raw = User.FindFirst(ClaimTypes.NameIdentifier)?.Value ?? User.FindFirst("sub")?.Value;
            if (long.TryParse(raw, out long id)) return id;
            return null;
        }

        private Relationship? GetRelationship(long playerId, long targetId) =>
            db.Relationships
                .Include(x => x.Player)
                .Include(x => x.TargetPlayer)
                .FindOne(x => x.Player.Id == playerId && x.TargetPlayer.Id == targetId);

        private Relationship GetOrCreate(long playerId, long targetId)
        {
            var rel = GetRelationship(playerId, targetId);
            if (rel != null) return rel;
            rel = new Relationship
            {
                Player = db.Accounts.FindById(playerId),
                TargetPlayer = db.Accounts.FindById(targetId)
            };
            db.Relationships.Insert(rel);
            return rel;
        }

        private async Task PushRelToPlayer(long toPlayerId, long aboutPlayerId)
        {
            var rel = GetRelationship(toPlayerId, aboutPlayerId);
            await ws.SendToPlayer(toPlayerId, PushNotification.RelationshipChanged, new Dictionary<string, object>
            {
                ["PlayerID"] = aboutPlayerId,
                ["RelationshipType"] = (int)(rel?.RelationshipType ?? RelationshipType.None),
                ["Muted"] = (int)(rel?.Muted ?? MuteState.None),
                ["Ignored"] = (int)(rel?.Ignored ?? IgnoreState.None),
                ["Favorited"] = rel?.Favorited ?? 0
            });
        }

        private void DeleteFriendInvites(long fromPlayerId, long toPlayerId)
        {
            var messageToDelete = db.Messages.FindOne(m =>
        m.FromPlayer.Id == fromPlayerId &&
        m.Player.Id == toPlayerId &&
        m.Type == MessageType.FriendInvite);

            if (messageToDelete != null)
            {
                db.Messages.Delete(messageToDelete.Id);

                ws.SendToPlayer(toPlayerId, PushNotification.MessageDeleted, new Dictionary<string, object>
                {
                    ["Id"] = messageToDelete.Id
                });
            }
        }

        [HttpGet("v2/get")]
        [Authorize]
        public async Task<IActionResult> get()
        {
            long? pid = GetCurrentPlayerId();
            if (pid == null) return Unauthorized();

            var rels = db.Relationships
                .Query()
                .Include(x => x.Player)
                .Include(x => x.TargetPlayer)
                .Where(x => x.Player.Id == pid.Value)
                .ToList()
                .Select(r => r.ToDictionary())
                .ToList();

            return Ok(rels);
        }

        [HttpGet("v2/sendfriendrequest")]
        [Authorize]
        public async Task<IActionResult> SendFriendRequest([FromQuery] long id = 0)
        {
            long? pid = GetCurrentPlayerId();
            if (pid == null) return Unauthorized();

            if (id == 0 || id == pid || db.Accounts.FindById(id) == null)
                return Ok();

            var myRel = GetOrCreate(pid.Value, id);
            var theirRel = GetOrCreate(id, pid.Value);

            if (myRel.RelationshipType == RelationshipType.Friend)
                return Ok();

            // they already sent us one — auto-accept both sides
            if (theirRel.RelationshipType == RelationshipType.Sent || myRel.RelationshipType == RelationshipType.Received)
            {
                myRel.RelationshipType = RelationshipType.Friend;
                theirRel.RelationshipType = RelationshipType.Friend;
                db.Relationships.Update(myRel);
                db.Relationships.Update(theirRel);

                DeleteFriendInvites(pid.Value, id);

                Account me = db.Accounts.FindById(pid.Value);
                Account them = db.Accounts.FindById(id);
                await messageService.SendMessage(me, them, MessageType.FriendRequestAccepted, pid.Value.ToString());

                await PushRelToPlayer(id, pid.Value);
                await PushRelToPlayer(pid.Value, id);
                return Ok();
            }

            // new outgoing request
            myRel.RelationshipType = RelationshipType.Sent;
            theirRel.RelationshipType = RelationshipType.Received;
            db.Relationships.Update(myRel);
            db.Relationships.Update(theirRel);

            DeleteFriendInvites(id, pid.Value);

            Account sender = db.Accounts.FindById(pid.Value);
            Account recipient = db.Accounts.FindById(id);
            await messageService.SendMessage(sender, recipient, MessageType.FriendInvite, pid.Value.ToString());

            await PushRelToPlayer(id, pid.Value);
            await PushRelToPlayer(pid.Value, id);
            return Ok(myRel.ToDictionary());
        }

        [HttpGet("v2/addfriend")]
        [Authorize]
        public async Task<IActionResult> AddFriend([FromQuery] long id = 0) =>
            await SendFriendRequest(id);

        [HttpGet("v2/acceptfriendrequest")]
        [Authorize]
        public async Task<IActionResult> AcceptFriendRequest([FromQuery] long id = 0)
        {
            long? pid = GetCurrentPlayerId();
            if (pid == null) return Unauthorized();

            if (id == 0 || id == pid)
                return Ok();

            var myRel = GetOrCreate(pid.Value, id);
            var theirRel = GetOrCreate(id, pid.Value);

            if (theirRel.RelationshipType != RelationshipType.Sent && myRel.RelationshipType != RelationshipType.Received)
                return Ok();

            myRel.RelationshipType = RelationshipType.Friend;
            theirRel.RelationshipType = RelationshipType.Friend;
            db.Relationships.Update(myRel);
            db.Relationships.Update(theirRel);

            DeleteFriendInvites(pid.Value, id);

            Account me = db.Accounts.FindById(pid.Value);
            Account them = db.Accounts.FindById(id);
            await messageService.SendMessage(me, them, MessageType.FriendRequestAccepted, pid.Value.ToString());

            await PushRelToPlayer(id, pid.Value);
            await PushRelToPlayer(pid.Value, id);
            return Ok(myRel.ToDictionary());
        }

        [HttpGet("v2/removefriend")]
        [Authorize]
        public async Task<IActionResult> RemoveFriend([FromQuery] long id = 0)
        {
            long? pid = GetCurrentPlayerId();
            if (pid == null) return Unauthorized();

            if (id != 0 && id != pid)
            {
                var myRel = GetRelationship(pid.Value, id);
                var theirRel = GetRelationship(id, pid.Value);

                if (myRel != null) { myRel.RelationshipType = RelationshipType.None; db.Relationships.Update(myRel); }
                if (theirRel != null) { theirRel.RelationshipType = RelationshipType.None; db.Relationships.Update(theirRel); }

                DeleteFriendInvites(pid.Value, id);
                DeleteFriendInvites(id, pid.Value);

                await PushRelToPlayer(id, pid.Value);
                await PushRelToPlayer(pid.Value, id);

                Dictionary<string, object> gg = new()
                {
                    ["PlayerID"] = pid,
                    ["RelationshipType"] = (int)(myRel?.RelationshipType ?? RelationshipType.None),
                    ["Muted"] = (int)(myRel?.Muted ?? MuteState.None),
                    ["Ignored"] = (int)(myRel?.Ignored ?? IgnoreState.None),
                    ["Favorited"] = myRel?.Favorited ?? 0
                };

                return Ok(gg);
            }

            return Ok();
        }

        [HttpGet("v1/favorite")]
        [Authorize]
        public async Task<IActionResult> Favorite([FromQuery] long id = 0)
        {
            long? pid = GetCurrentPlayerId();
            if (pid == null) return Unauthorized();

            if (id != 0 && id != pid)
            {
                var rel = GetOrCreate(pid.Value, id);
                rel.Favorited = 1;
                db.Relationships.Update(rel);
                return Ok(rel.ToDictionary());
            }

            return Ok();
        }

        [HttpGet("v1/unfavorite")]
        [Authorize]
        public async Task<IActionResult> Unfavorite([FromQuery] long id = 0)
        {
            long? pid = GetCurrentPlayerId();
            if (pid == null) return Unauthorized();

            if (id != 0 && id != pid)
            {
                var rel = GetOrCreate(pid.Value, id);
                rel.Favorited = 0;
                db.Relationships.Update(rel);
                return Ok(rel.ToDictionary());
            }

            return Ok();
        }

        [HttpPost("v1/mute")]
        [Authorize]
        public async Task<IActionResult> Mute([FromForm(Name = "PlayerId"), Required] long playerId)
        {
            long? pid = GetCurrentPlayerId();
            if (pid == null) return Unauthorized();

            if (playerId == 0 || playerId == pid)
                return Ok();

            var myRel = GetOrCreate(pid.Value, playerId);
            var theirRel = GetOrCreate(playerId, pid.Value);

            myRel.Muted = MuteState.Local;
            theirRel.Muted = MuteState.Remote;
            db.Relationships.Update(myRel);
            db.Relationships.Update(theirRel);

            await PushRelToPlayer(pid.Value, playerId);
            await PushRelToPlayer(playerId, pid.Value);
            return Ok(myRel.ToDictionary());
        }

        [HttpPost("v1/unmute")]
        [Authorize]
        public async Task<IActionResult> Unmute([FromForm(Name = "PlayerId"), Required] long playerId)
        {
            long? pid = GetCurrentPlayerId();
            if (pid == null) return Unauthorized();

            if (playerId == 0 || playerId == pid)
                return Ok();

            var myRel = GetOrCreate(pid.Value, playerId);
            var theirRel = GetOrCreate(playerId, pid.Value);

            myRel.Muted = MuteState.None;
            if (theirRel.Muted == MuteState.Remote) theirRel.Muted = MuteState.None;
            db.Relationships.Update(myRel);
            db.Relationships.Update(theirRel);

            await PushRelToPlayer(pid.Value, playerId);
            await PushRelToPlayer(playerId, pid.Value);
            return Ok(myRel.ToDictionary());
        }

        [HttpPost("v1/ignore")]
        [Authorize]
        public async Task<IActionResult> Ignore([FromForm(Name = "PlayerId"), Required] long playerId)
        {
            long? pid = GetCurrentPlayerId();
            if (pid == null) return Unauthorized();

            if (playerId == 0 || playerId == pid)
                return Ok();

            var myRel = GetOrCreate(pid.Value, playerId);
            var theirRel = GetOrCreate(playerId, pid.Value);

            myRel.Ignored = IgnoreState.Local;
            theirRel.Ignored = IgnoreState.Remote;
            db.Relationships.Update(myRel);
            db.Relationships.Update(theirRel);

            await PushRelToPlayer(pid.Value, playerId);
            await PushRelToPlayer(playerId, pid.Value);
            return Ok(myRel.ToDictionary());
        }

        [HttpPost("v1/unignore")]
        [Authorize]
        public async Task<IActionResult> Unignore([FromForm(Name = "PlayerId"), Required] long playerId)
        {
            long? pid = GetCurrentPlayerId();
            if (pid == null) return Unauthorized();

            if (playerId == 0 || playerId == pid)
                return Ok();

            var myRel = GetOrCreate(pid.Value, playerId);
            var theirRel = GetOrCreate(playerId, pid.Value);

            myRel.Ignored = IgnoreState.None;
            if (theirRel.Ignored == IgnoreState.Remote) theirRel.Ignored = IgnoreState.None;
            db.Relationships.Update(myRel);
            db.Relationships.Update(theirRel);

            await PushRelToPlayer(pid.Value, playerId);
            await PushRelToPlayer(playerId, pid.Value);
            return Ok(myRel.ToDictionary());
        }

        [HttpPost("v1/bulkignoreplatformusers")]
        public IActionResult BulkIgnorePlatformUsers() =>
            Ok();

    }
}