using System;
using System.Collections.Generic;
using System.Text.Json;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Hosting;
using RainOpsMini.Helpers;
using RainOpsMini.Helpers.RCON;

namespace RainOpsMini.Plugins
{
    /// <summary>
    /// 循环广播插件 - 定时播放预设的黄字公告
    /// </summary>
    public class BroadcastPlugin : BackgroundService, IPlugin
    {
        public string Name => "自动广播";
        public string Description => "循环广播插件 - 定时播放预设的黄字公告（队列广播）";
        public PluginCategory Category => PluginCategory.BasicFunction;
        public bool IsEnabled => _config.Enabled;

        private BroadcastConfig _config = new BroadcastConfig();
        
        // 记录当前播放到第几条
        private int _currentIndex = 0;


        /// <summary>
        /// 广播配置项
        /// </summary>
        public class BroadcastItem
        {
            /// <summary>
            /// 广播内容
            /// </summary>
            public string Message { get; set; } = "";
            
            /// <summary>
            /// 本条广播后的等待时间（秒）
            /// </summary>
            public int IntervalSeconds { get; set; } = 300;
        }

        public class BroadcastConfig 
        {
             /// <summary>
             /// 是否启用
             /// </summary>
             public bool Enabled { get; set; } = false;

             /// <summary>
             /// 本批次全部播放完毕后的等待时间（秒）
             /// </summary>
             public int BatchIntervalSeconds { get; set; } = 300;

             /// <summary>
             /// 广播消息队列
             /// </summary>
             public List<BroadcastItem> Messages { get; set; } = new List<BroadcastItem> 
             {
                 new BroadcastItem { Message = "欢迎加入本服务器！", IntervalSeconds = 300 }
             };
        }

        /// <summary>
        /// 获取当前配置
        /// </summary>
        /// <returns>配置对象</returns>
        public object GetConfig() => _config;

        /// <summary>
        /// 重置配置为默认值
        /// </summary>
        public void ResetConfig()
        {
            _config = new BroadcastConfig();
            _currentIndex = 0;
        }

        /// <summary>
        /// 更新配置
        /// </summary>
        /// <param name="config">JSON配置元素</param>
        public void UpdateConfig(JsonElement config)
        {
            try
            {
                var options = new JsonSerializerOptions
                {
                    PropertyNameCaseInsensitive = true,
                    ReadCommentHandling = JsonCommentHandling.Skip,
                    AllowTrailingCommas = true
                };
                _config = JsonSerializer.Deserialize<BroadcastConfig>(config.GetRawText(), options) ?? new BroadcastConfig();
            }
            catch (Exception ex)
            {
                Console.WriteLine($"[BroadcastPlugin] 配置更新失败: {ex.Message}");
            }
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
             while (!stoppingToken.IsCancellationRequested) 
             {
                 try 
                 {
                     if (_config.Enabled && _config.Messages != null && _config.Messages.Count > 0)
                     {
                         // 获取当前消息
                         if (_currentIndex >= _config.Messages.Count) _currentIndex = 0;
                         
                         var item = _config.Messages[_currentIndex];
                         
                         string msg = item.Message;
                         
                         // 限制长度 60 字
                         if (msg.Length > 60) msg = msg.Substring(0, 60);

                         // 发送广播
                         if (!string.IsNullOrWhiteSpace(msg))
                         {
                             string cmd = $"AdminBroadcast {msg}"; 
                             if (Program.Client != null && Program.Client.IsConnected)
                             {
                                 await Program.Client.SendCommandAsync(cmd);
                                 RainOpsLog.Log($"[BroadcastPlugin] 发送广播: {msg}");
                             }
                         }
                         
                         // 指向下一条
                         _currentIndex++;
                         
                         // 等待间隔
                         int delay = item.IntervalSeconds;
                         if (delay < 3) delay = 3; // 最小间隔 3 秒
                         await Task.Delay(delay * 1000, stoppingToken);

                         // 如果本批次播放完毕，等待批次间隔
                         if (_currentIndex >= _config.Messages.Count)
                         {
                             _currentIndex = 0;
                             int batchDelay = _config.BatchIntervalSeconds;
                             if (batchDelay > 0)
                             {
                                 await Task.Delay(batchDelay * 1000, stoppingToken);
                             }
                         }
                     }
                     else 
                     {
                         // 如果未启用或无消息，等待较短时间再次检查
                         await Task.Delay(5000, stoppingToken);
                     }
                 }
                 catch (TaskCanceledException)
                 {
                     break;
                 }
                 catch (Exception ex) 
                 {
                     RainOpsLog.Log($"[BroadcastPlugin] 执行异常: {ex.Message}");
                     await Task.Delay(10000, stoppingToken); // 出错后等待 10 秒
                 }
             }
        }
    }
}