using DS.Module.Core;
using DS.Module.Core.Data;
using DS.WMS.Core.TaskPlat.Entity;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using SqlSugar;
using System.Diagnostics;
using System.Reflection;

namespace DS.WMS.Core.TaskPlat
{
    /// <summary>
    /// 任务编排执行器
    /// </summary>
    public class TaskFlowRuner
    {
        private readonly SqlSugarScopeProvider tenantDb = null!;
        private readonly IServiceProvider serviceProvider = null!;
        private readonly ILogger<TaskFlowRuner> logger = null!;
        private TaskFlowRuner() { }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="tenantDb"></param>
        /// <param name="serviceProvider"></param>
        public TaskFlowRuner(SqlSugarScopeProvider tenantDb, IServiceProvider serviceProvider)
        {
            this.tenantDb = tenantDb;
            this.serviceProvider = serviceProvider;
            this.logger = serviceProvider.GetRequiredService<ILogger<TaskFlowRuner>>();
        }
        /// <summary>
        /// 执行
        /// </summary>
        /// <param name="taskBaseType">任务类型</param>
        /// <param name="taskId">任务Id</param>
        /// <param name="dataContext">起始入参数据上下文</param>
        /// <returns>(执行日志Id,模块是否全部执行完成,模块执行结果是否全部为success)</returns>
        public async Task<(long? flowLogId, bool isAllComplete, bool isAllSuccess)> Run(TaskBaseTypeEnum taskBaseType, long taskId, TaskFlowDataContext dataContext)
        {
            if (dataContext == null)
            {
                throw new ArgumentNullException(nameof(dataContext));
            }
            var allConfigList = await tenantDb.Queryable<TaskFlowConfig>()
                                              .Where(t => t.IsMain && t.TaskType == taskBaseType.ToString())
                                              .OrderBy(t => t.Id)
                                              .ToListAsync();

            if (allConfigList.Count == 0)
            {
                string msg = $"未找到任何用于【{taskBaseType}】业务的处理流程";
                TaskFlowLog log = new()
                {
                    IsMatch = false,
                    TaskId = taskId,
                    TaskType = taskBaseType.ToString(),
                    IsComplete = false,
                    ExceptionMessage = msg,
                    IsSuccess = false,
                };
                await tenantDb.Insertable(log).ExecuteCommandAsync();
                logger.LogInformation(msg);
                return (null, false, false);
                //throw new Exception(msg);
            }

            var allConfigIdList = allConfigList.Select(x => x.Id);
            var allConditionList = await tenantDb.Queryable<TaskFlowCondition>()
                                              .Where(x => allConfigIdList.Contains(x.ConfigId))
                                              .ToListAsync();

            // 判断每项流程达成的条件数量
            Dictionary<long, int> configMatchCount = allConfigList.ToDictionary(x => x.Id, x => 0);
            foreach (var configItem in allConfigList)
            {
                var conditionListGroup = allConditionList.Where(x => x.ConfigId == configItem.Id);
                foreach (var conditionItem in conditionListGroup)
                {
                    string? valStr;
                    if (conditionItem.FieldName.Contains('.'))
                    {
                        var firstKey = conditionItem.FieldName.Split('.').First();

                        if (!dataContext.ContainsKey(firstKey)) continue;

                        var obj = dataContext.Get<object>(firstKey)!;

                        var propertyPath = conditionItem.FieldName.Substring(conditionItem.FieldName.IndexOf('.') + 1);
                        var (_, val, _) = GetPropertyValue(obj, propertyPath);
                        if (val == null) continue;

                        valStr = val.ToString();
                    }
                    else
                    {
                        if (!dataContext.ContainsKey(conditionItem.FieldName)) continue;

                        var obj = dataContext.Get<object>(conditionItem.FieldName)!;
                        valStr = obj.ToString();
                    }

                    var oldValue = configMatchCount[configItem.Id];
                    if (conditionItem.MatchType == 1)
                    {
                        if (valStr?.Equals(conditionItem.MatchValue, StringComparison.CurrentCultureIgnoreCase) == true)
                        {
                            configMatchCount[configItem.Id] = oldValue + 1;
                        }
                        else
                        {
                            configMatchCount[configItem.Id] = oldValue - 1;
                        }
                    }
                    else if (conditionItem.MatchType == 2)
                    {
                        if (valStr?.Contains(conditionItem.MatchValue, StringComparison.CurrentCultureIgnoreCase) == true)
                        {
                            configMatchCount[configItem.Id] = oldValue + 1;
                        }
                        else
                        {
                            configMatchCount[configItem.Id] = oldValue - 1;
                        }
                    }
                    else if (conditionItem.MatchType == 3)
                    {
                        if (valStr?.StartsWith(conditionItem.MatchValue, StringComparison.CurrentCultureIgnoreCase) == true)
                        {
                            configMatchCount[configItem.Id] = oldValue + 1;
                        }
                        else
                        {
                            configMatchCount[configItem.Id] = oldValue - 1;
                        }
                    }
                    else if (conditionItem.MatchType == 4)
                    {
                        if (valStr?.EndsWith(conditionItem.MatchValue, StringComparison.CurrentCultureIgnoreCase) == true)
                        {
                            configMatchCount[configItem.Id] = oldValue + 1;
                        }
                        else
                        {
                            configMatchCount[configItem.Id] = oldValue - 1;
                        }
                    }
                }
            }

            // 取出最匹配的流程
            KeyValuePair<long, int>? bestMatched = null!;
            foreach (var item in configMatchCount)
            {
                if (bestMatched == null)
                {
                    bestMatched = new KeyValuePair<long, int>(item.Key, item.Value);
                    continue;
                }

                if (item.Value > bestMatched.Value.Value)
                {
                    bestMatched = new KeyValuePair<long, int>(item.Key, item.Value);
                    continue;
                }

                if (item.Value == bestMatched.Value.Value)
                {
                    // 如果达成的条件数量相等，则取最早的流程
                    if (item.Key < bestMatched.Value.Key)
                    {
                        bestMatched = new KeyValuePair<long, int>(item.Key, item.Value);
                        continue;
                    }
                }
            }
            var targetConfig = allConfigList.First(x => x.Id == bestMatched.Value.Key);

            var configList = await tenantDb.Queryable<TaskFlowConfig>().Where(x => x.MainConfigId == targetConfig.Id).ToListAsync();
            var configIdList = configList.Select(x => x.Id).ToList();
            var moduleIdList = configList.Select(x => x.ExecuteModuleId).ToList();

            var paramList = await tenantDb.Queryable<TaskFlowParam>().Where(x => configIdList.Contains(x.ConfigId)).ToListAsync();
            var moduleList = await tenantDb.Queryable<TaskFlowModule>().Where(x => moduleIdList.Contains(x.Id)).ToListAsync();

            TaskFlowLog flowLog = new()
            {
                Id = SnowFlakeSingle.Instance.NextId(),
                IsMatch = true,
                TaskId = taskId,
                TaskType = taskBaseType.ToString(),
                MatchMainConfigId = targetConfig.Id,
                ConfigList = JsonConvert.SerializeObject(configList),
                ModuleList = JsonConvert.SerializeObject(moduleList),
                IsComplete = true,
                IsSuccess = true,
            };

            // 执行流程
            foreach (var configItem in configList)
            {
                TaskFlowLogDetail flowLogDetail = new()
                {
                    ConfigId = configItem.Id,
                    PId = flowLog.Id,
                    IsSuccess = true,
                };
                try
                {
                    var paramItemList = paramList.Where(x => x.ConfigId == configItem.Id).ToList();
                    foreach (var paramItem in paramItemList)
                    {
                        dataContext.Set(paramItem.FieldName!, paramItem.FieldValue!);

                        //if (dataContext.ContainsKey(paramItem.FieldName!))
                        //{
                        //    dataContext[paramItem.FieldName!] = paramItem.FieldValue!;
                        //}
                        //else
                        //{
                        //    dataContext.TryAdd(paramItem.FieldName!, paramItem.FieldValue!);
                        //}
                    }

                    var module = moduleList.FirstOrDefault(x => x.Id == configItem.ExecuteModuleId);
                    if (module == null)
                    {
                        throw new Exception($"未找到指定流程配置，ExecuteModuleId：{configItem.ExecuteModuleId}");
                    }

                    flowLogDetail.ModuleId = module.Id;
                    flowLogDetail.ModuleName = module.Name;

                    Assembly assembly;
                    if (module.AssemblyName!.StartsWith("DS.WMS.Core"))
                    {
                        assembly = Assembly.GetExecutingAssembly();
                    }
                    else
                    {
                        assembly = Assembly.Load(module.AssemblyName!);
                    }
                    var interfaceType = assembly.DefinedTypes.FirstOrDefault(x => x.Name == module.InterfaceName!);
                    if (interfaceType == null)
                    {
                        throw new Exception($"在程序集【{module.AssemblyName}】下未找到Interface【{module.InterfaceName}】");
                    }
                    object? imp = serviceProvider.GetService(interfaceType);
                    if (imp == null)
                    {
                        throw new Exception($"在依赖注入容器未找到Interface【{module.InterfaceName}】的实现类");
                    }
                    var impType = imp.GetType();


                    MethodInfo? method = impType.GetMethod(module.MethodName!, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
                    if (method == null)
                    {
                        throw new Exception($"在Interface【{module.InterfaceName}】的实现类中未找到Method【{module.MethodName}】");
                    }

                    Stopwatch stopwatch = Stopwatch.StartNew();

                    var taskObj = method.Invoke(imp, new object[] { dataContext })!;

                    if (taskObj is Task task)
                    {
                        await task;

                        if (task.IsFaulted)
                        {
                            if (task.Exception != null)
                            {
                                throw task.Exception;
                            }
                            else
                            {
                                throw new Exception("模块执行过程中发生未知异常，但是Exception为null，请检查");
                            }
                        }

                        dynamic dynamicTask = task;
                        if (dynamicTask.Result != null)
                        {
                            flowLogDetail.ExecuteReturn = JsonConvert.SerializeObject(dynamicTask.Result);

                            var isSuccess = dynamicTask.Result.Succeeded;
                            if (isSuccess != null && isSuccess is bool)
                            {
                                flowLogDetail.IsSuccess = isSuccess;

                                if (isSuccess == false)
                                {
                                    flowLog.IsSuccess = false;
                                }
                            }
                        }
                    }
                    else
                    {
                        throw new Exception("模块执行结果不是Task类型，请检查");
                        // 后面支持非异步
                    }
                    stopwatch.Stop();
                    flowLogDetail.ElapsedMillisecond = stopwatch.ElapsedMilliseconds;
                    flowLogDetail.IsComplete = true;

                    await tenantDb.Insertable(flowLogDetail).ExecuteCommandAsync();
                }
                catch (Exception ex)
                {
                    flowLog.IsComplete = false;
                    flowLog.IsSuccess = false;

                    flowLogDetail.IsComplete = false;
                    flowLogDetail.IsSuccess = false;
                    flowLogDetail.ExceptionMessage = WriteLog("模块执行过程中发生异常", ex);
                    await tenantDb.Insertable(flowLogDetail).ExecuteCommandAsync();

                    if (configItem.IsExceptionContinue)
                    {
                        continue;
                    }
                    else
                    {
                        break;
                    }
                }
            }

            await tenantDb.Insertable(flowLog).ExecuteCommandAsync();
            return (flowLog.Id, flowLog.IsComplete, flowLog.IsSuccess);
        }


        /// <summary>
        /// 深度获取对象属性值
        /// </summary>
        /// <param name="obj">对象</param>
        /// <param name="propertyPath">属性路径</param>
        static (bool isOk, object? val, string? otherPropertyPath) GetPropertyValue(object obj, string propertyPath)
        {
            var propertyName = propertyPath.Split('.').FirstOrDefault();
            var type = obj.GetType();

            var property = type.GetProperty(propertyName);
            if (property == null)
            {
                return (true, null, null);
            }

            if (property.PropertyType.IsClass && property.PropertyType != typeof(string))
            {
                var val = property.GetValue(obj);
                if (val == null)
                {
                    return (true, null, null);
                }
                var otherPropertyPath = propertyPath.Substring(propertyPath.IndexOf('.') + 1);
                return GetPropertyValue(val, otherPropertyPath);
            }
            else
            {
                var val = property.GetValue(obj);
                return (true, val, null);
            }
        }

        static string WriteLog(string throwMsg, Exception ex)
        {
            return string.Format("【自定义错误】：{0} \r\n【异常类型】：{1} \r\n【异常信息】：{2} \r\n【堆栈调用】：{3}", new object[]
            {
                throwMsg,
                ex.GetType().Name,
                ex.Message,
                ex.StackTrace
            });
        }
    }
}