using Newtonsoft.Json;
using SqlSugar;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks; 

namespace ReZero.SuperAPI
{
    internal class InsertOrUpdateRange : CommonDataService, IDataService
    {
        public async Task<object> ExecuteAction(DataModel dataModel)
        {
            var db = App.GetDbTableId(dataModel.TableId) ?? App.Db;
            var type = await EntityGeneratorManager.GetTypeAsync(dataModel.TableId);
            base.InitDb(type, db);
            this.InitData(type, db, dataModel);
            CheckSystemData(db, dataModel, type, db.EntityMaintenance.GetEntityInfo(type));
            this.SetDefaultValue(dataModel, db, type);
            int result = await ExecuteUpdate(dataModel, db);
            base.ClearAll(dataModel);
            return GetResult(dataModel, result);
        }

        private static async Task<int> ExecuteUpdate(DataModel dataModel, ISqlSugarClient db)
        {
            var list= ((IList)dataModel.Data!).Cast<object>().ToList();
            var result = 0;
            try
            {
                db.Ado.BeginTran();
                await db.Utilities.PageEachAsync(list,100, async item =>
                {
                    result+=await InsertOrUpdateAsync(dataModel, item, db);
                });
                db.Ado.CommitTran();
            }
            catch (Exception)
            {
                db.Ado.RollbackTran();
                throw;
            }
            return result;
        }
        private static async Task<int> InsertOrUpdateAsync(DataModel dataModel, object data, ISqlSugarClient db)
        {
            int result = 0;
            var context = ((SqlSugarClient)db).Context;
            var storageableByObject = db.StorageableByObject(data);
            var methodino = (MethodInfo)storageableByObject.GetType().GetProperty("MethodInfo", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(storageableByObject);
            var value = storageableByObject.GetType().GetProperty("objectValue", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(storageableByObject);
            var groupObject = methodino.Invoke(context, new object[] { value });
            var task = (Task)groupObject.GetType().GetMethod("ToStorageAsync").Invoke(groupObject, new object[] { });
            var groupValues = await GetTask(task);
            var insertList = GetSelectItemList(groupValues.GetType().GetProperty("InsertList").GetValue(groupValues));
            var updateList = GetSelectItemList(groupValues.GetType().GetProperty("UpdateList").GetValue(groupValues));
            var updatecolumns = GetUpdateableColumns(dataModel);
            if (updateList.Any())
                result += db.UpdateableByObject(updateList).UpdateColumns(updatecolumns).ExecuteCommand();
            if (insertList.Any())
                result += db.InsertableByObject(insertList).ExecuteCommand();
            return result;
        }
        public static List<object> GetSelectItemList(object objectValue)
        {
            var list = ((IList)objectValue).Cast<object>().ToList();
            list = list.Select(it => it.GetType().GetProperty("Item").GetValue(it)).ToList();
            return list;
        }

        private static async Task<object> GetTask(Task task)
        {
            await task.ConfigureAwait(false); // 等待任务完成
            var resultProperty = task.GetType().GetProperty("Result");
            var result = resultProperty.GetValue(task);
            return result;
        }
        private static string[] GetUpdateableColumns(DataModel dataModel)
        {
            string[] result = null!;
            if (!string.IsNullOrEmpty(dataModel.TableColumns))
            {
                result = dataModel.TableColumns.Split(",");
            }
            else
            {
                result = new string[] { };
            }
            return result;
        }

        internal new void InitData(Type type, ISqlSugarClient db, DataModel dataModel)
        {
            var json = dataModel?.DefaultParameters?.FirstOrDefault().Value + "";
            object obj = JsonConvert.DeserializeObject(json, typeof(List<>).MakeGenericType(type))!;
            dataModel!.Data = obj;
        }
        private static UpdateCommonMethodInfo GetUpdateable(DataModel dataModel, UpdateMethodInfo updateable)
        {
            UpdateCommonMethodInfo updateCommonMethodInfo; 
            if (!string.IsNullOrEmpty(dataModel.TableColumns))
            {
                updateCommonMethodInfo = updateable.UpdateColumns(dataModel.TableColumns.Split(","));
            }
            else
            {
                updateCommonMethodInfo = updateable.UpdateColumns();
            }

            return updateCommonMethodInfo;
        }

        private static object GetResult(DataModel dataModel, int result)
        {
            if (dataModel.ResultType == SqlResultType.AffectedRows)
            {
                return result;
            }
            else
            {
                return true;
            }
        }

        private void SetDefaultValue(DataModel dataModel, ISqlSugarClient db, Type type)
        {
            if (EntityMappingService.IsAnyDefaultValue(dataModel))
            {
                foreach (var item in (IList)dataModel.Data!)
                {
                    var para = new DataModel()
                    {
                        Data = item,
                        DefaultValueColumns = dataModel.DefaultValueColumns
                    };
                    EntityMappingService.GetDataByDefaultValueParameters(type, db, para);
                }
            }
        }
    }
}