using Common;
using CommonDomain.Enum;
using Microsoft.AspNetCore.Mvc;
using RedisService;

namespace FishGameHost.Controllers
{
    [ApiController, Route("api/[controller]")]
    public class RoomController : ControllerBase
    {
        private readonly IConfiguration _configuration;
        private readonly IRedisService _redisService;

        public RoomController(IConfiguration configuration, IRedisService redisService)
        {
            _configuration = configuration;
            _redisService = redisService;
        }

        public class QuickJoinResult
        {
            public string RoomId { get; set; } = "";
            public string WebSocketUrl { get; set; } = "";
        }

        /// <summary>
        /// 快速加入 - 根据游戏类型和等级查找一个不满员的房间，直接返回 WS 地址和 roomId
        /// </summary>
        [HttpGet("QuickJoin")]
        public BaseResponse<QuickJoinResult> QuickJoin(int gameType, int level)
        {
            var rooms = _redisService.GetGameRoomAllList();

            if(rooms==null || rooms.Count()==0)
                return new BaseResponse<QuickJoinResult>();
            var candidates = rooms?.Where(r =>
                r != null &&
                (int)r.GameType == gameType &&
                (level == 0 || r.RoomLevel == level) &&
                (r.Players?.Count ?? 0) < r.MaxPlayerCount).ToList();

            if (candidates == null || candidates.Count == 0)
                return new BaseResponse<QuickJoinResult> { Code = CommonResponseCodeEnum.Error, Info = "暂无可用房间" };

            var room = candidates[Random.Shared.Next(candidates.Count)];

            var wsUrl = ResolveWebSocketUrl(room.RoomId);
            return new BaseResponse<QuickJoinResult> { Data = new QuickJoinResult { RoomId = room.RoomId, WebSocketUrl = wsUrl } };
        }

        private string ResolveWebSocketUrl(string roomId)
        {
            var instances = _configuration.GetSection("GameServerInstances").Get<List<string>>();
            if (instances == null || instances.Count == 0)
                return "";

            return instances[0];
        }

        /// <summary>
        /// 分配房间到目标游戏服务器 - 返回指定房间对应的对局服务 WS 地址
        /// </summary>
        [HttpGet("Assign")]
        public BaseResponse<string> AssignRoom(string roomId)
        {
            if (string.IsNullOrWhiteSpace(roomId))
                return new BaseResponse<string> { Code = CommonResponseCodeEnum.ParamError, Info = "roomId 不能为空" };

            var wsUrl = ResolveWebSocketUrl(roomId);
            if (string.IsNullOrEmpty(wsUrl))
                return new BaseResponse<string> { Code = CommonResponseCodeEnum.Error, Info = "未配置游戏服务器实例" };

            return new BaseResponse<string> { Data = wsUrl };
        }

    }
}