using System;
using System.Collections.Generic;

namespace ET.Server
{
    /// <summary>
    /// 选角绑定角色
    /// </summary>
    [MessageHandler(SceneType.Game)]
    public class C2G_BindPlayerHandler: AMRpcHandler<C2G_BindPlayer, G2C_BindPlayer>
    {
        protected override async ETTask Run(Session session, C2G_BindPlayer request, G2C_BindPlayer response, Action reply)
        {
            if (string.IsNullOrEmpty(request.UserId.ToString().Trim()))
            {
                Log.Debug($"参数错误,账号id为空");
                response.Error = ErrorCode.ERR_ParameterError;
                reply();
                return;
            }

            Scene scene = session.DomainScene();
            // 预先创建数据
            long _id = IdGenerater.Instance.GenerateUnitId(scene.DomainZone());
            PlayerInfo playerInfo = new PlayerInfo();
            playerInfo.Id = _id;
            playerInfo.UserId = session.GetComponent<SessionPlayerComponent>().UserId;
            playerInfo.Name = "玩家-" + _id;
            playerInfo.Sex = 0;
            playerInfo.Pro = (int)PlayerProType.CANG_LANG;
            playerInfo.Level = 1;
            playerInfo.Exp = 0;

            // 简易版登录,直接创建一个player
            if (request.PlayerId <= 0)
            {
                // 角色列表是否有数据
                List<PlayerInfo> playerList = session.GetComponent<SessionPlayerComponent>().PlayerList;

                if (playerList is { Count: > 0 })
                {
                    playerInfo = playerList[0];
                }
                else
                {
                    using (await CoroutineLockComponent.Instance.Wait(CoroutineLockType.CreatePlayer, _id.ToString().Trim().GetHashCode()))
                    {
                        await DBManagerComponent.Instance.GetZoneDB(session.DomainZone()).Save(playerInfo);
                    }
                }
            }
            else
            {
                // 正常选角,判断参数
                if (!session.GetComponent<SessionPlayerComponent>().IsExist(request.PlayerId))
                {
                    Log.Debug($"选角出错,没有选择的角色");
                    response.Error = ErrorCode.ERR_BindPlayerError;
                    reply();
                    return;
                }

                playerInfo = session.GetComponent<SessionPlayerComponent>().Get(request.PlayerId);

                if (playerInfo == null)
                {
                    Log.Debug($"选角出错,没有选择的角色");
                    response.Error = ErrorCode.ERR_BindPlayerError;
                    reply();
                    return;
                }

                long bindPlayerId = session.GetComponent<SessionPlayerComponent>().PlayerId;

                switch (bindPlayerId)
                {
                    case > 0 when bindPlayerId == request.PlayerId:
                        Log.Debug($"该角色已经绑定");
                        response.Error = ErrorCode.ERR_PlayerIdIsBind;
                        reply();
                        return;
                    case > 0 when bindPlayerId != request.PlayerId:
                        // todo 老角色下线
                        WNPlayer oldPlayer = scene.GetComponent<GamePlayerComponent>().Get(bindPlayerId);
                        if (oldPlayer != null)
                        {
                            oldPlayer.Dispose();
                            scene.GetComponent<GamePlayerComponent>().Remove(bindPlayerId);
                        }
                        break;
                }
            }

            WNPlayer player = scene.GetComponent<GamePlayerComponent>().Get(request.PlayerId);

            if (player != null)
            {
                // todo 顶号
                player.Dispose();
                scene.GetComponent<GamePlayerComponent>().Remove(request.PlayerId);
            }

            player = await PlayerFactory.CreatPlayer(session, playerInfo);

            // 绑定选择的玩家
            session.GetComponent<SessionPlayerComponent>().BindPlayerId(request.PlayerId > 0 ? request.PlayerId : player.GetId());

            // todo 分配场景
            Map map = MapHelper.BindPlayerDispatch(player);
            MapConfig mapConfig = map.Prop;

            // 登录数据
            player.OnLogin();
            map.OnPlayerLogin(player);

            response.Player = PlayerHelper.PlayerInfoToProto(player);
            response.Player.areaId = mapConfig.TemplateID;
            response.Player.instanceId = map.Id;
            response.Player.mapId = map.MapId;

            reply();
        }
    }
}