using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ICSSoft.Common
{
    public class HTTPHelper
    {
        private static log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

        //public static string HttpPost(string apiName, string url, string body)
        //{
        //    try
        //    {
        //        //log.Debug(url + Environment.NewLine + body);
        //        Encoding encoding = Encoding.UTF8;
        //        System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
        //        request.Method = "POST";
        //        request.Accept = "application/json, text/javascript, */*"; //"text/html, application/xhtml+xml, */*";
        //        request.ContentType = "application/json; charset=utf-8";
        //        // request.ContentType = "text/html, application/xhtml+xml";
        //        byte[] buffer = encoding.GetBytes(body);
        //        request.ContentLength = buffer.Length;
        //        request.GetRequestStream().Write(buffer, 0, buffer.Length);
        //        System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
        //        using (System.IO.StreamReader reader = new System.IO.StreamReader(response.GetResponseStream(), encoding))
        //        {
        //            return reader.ReadToEnd();
        //        }
        //    }
        //    catch (System.Net.WebException ex)
        //    {
        //        log.Error(ex.ToString() + Environment.NewLine + url + Environment.NewLine + body);
        //        throw new Exception(apiName + "调用失败," + ex.Message);
        //    }
        //}

        public static string HttpPost(string apiName, string url, string body)
        {
            try
            {
                Encoding encoding = Encoding.UTF8;
                System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
                request.Method = "POST";
                request.Accept = "application/json, text/javascript, */*";
                request.ContentType = "application/json; charset=utf-8";
                request.Timeout = Convert.ToInt32(System.Configuration.ConfigurationManager.AppSettings["TimeOut"]);//超时时间

                byte[] buffer = encoding.GetBytes(body);
                request.ContentLength = buffer.Length;
                request.GetRequestStream().Write(buffer, 0, buffer.Length);
                System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
                using (System.IO.StreamReader reader = new System.IO.StreamReader(response.GetResponseStream(), encoding))
                {
                    return reader.ReadToEnd();
                }
            }
            catch (System.Net.WebException ex)
            {
                log.Error(ex.ToString() + Environment.NewLine + url + Environment.NewLine + body);
                throw new Exception(apiName + "调用失败," + ex.Message);
            }
        }

        public static void BatchUpdate(SqlConnection conn, SqlTransaction transaction, string crateTemplateSql, string tmpTable, string updateCommandSql, DataSet dset, Dictionary<string, string[]> tableDecimalColumns = null)
        {
            try
            {
                if (crateTemplateSql != "")
                {
                    using (SqlCommand command = new SqlCommand(crateTemplateSql, conn, transaction))
                    {
                        command.ExecuteNonQuery();
                    }
                }

                foreach (DataTable dt in dset.Tables)
                {
                    if (dt == null) continue;
                    log.Debug("表名： " + dt.TableName);
                    // 根据表名获取对应的 decimal 列配置
                    string[] decimalColumns = null;
                    if (tableDecimalColumns != null && tableDecimalColumns.ContainsKey(dt.TableName))
                    {
                        decimalColumns = tableDecimalColumns[dt.TableName];
                    }

                    if (decimalColumns != null && decimalColumns.Length > 0)
                    {
                        ValidateDecimalColumns(dt, decimalColumns);
                    }

                    using (SqlBulkCopy bulkCopy = new SqlBulkCopy(conn, SqlBulkCopyOptions.Default, transaction))
                    {
                        bulkCopy.DestinationTableName = dt.TableName;

                        foreach (DataColumn column in dt.Columns)
                        {
                            log.Debug("column.ColumnName: " + column.ColumnName);
                            bulkCopy.ColumnMappings.Add(column.ColumnName, column.ColumnName);
                        }

                        bulkCopy.WriteToServer(dt);
                        bulkCopy.Close();
                    }
                }

                if (!string.IsNullOrEmpty(updateCommandSql))
                {
                    using (SqlCommand command = new SqlCommand(updateCommandSql, conn, transaction))
                    {
                        int i = command.ExecuteNonQuery();
                        log.Debug("updateCommandSql影响行数: " + i);
                    }
                }
            }
            catch (Exception ex)
            {
                log.Error("BatchUpdate 出错: " + ex.Message);
                throw;
            }
        }

        // 验证 decimal 列的数据类型
        private static void ValidateDecimalColumns(DataTable dataTable, string[] decimalColumns)
        {
            // 添加 null 检查
            if (dataTable == null || decimalColumns == null) return;

            foreach (string columnName in decimalColumns)
            {
                // 检查 columnName 是否为 null 或空
                if (string.IsNullOrEmpty(columnName)) continue;

                if (dataTable.Columns.Contains(columnName))
                {
                    // 检查列的数据类型
                    if (dataTable.Columns[columnName].DataType != typeof(decimal))
                    {
                        // 如果数据类型不是 decimal，创建一个新的 decimal 列
                        DataColumn newColumn = new DataColumn(columnName + "_New", typeof(decimal));
                        dataTable.Columns.Add(newColumn);

                        // 转换数据
                        foreach (DataRow row in dataTable.Rows)
                        {
                            // 检查 row 是否为 null
                            if (row == null) continue;

                            if (row[columnName] != DBNull.Value && row[columnName] != null)
                            {
                                decimal value=0;
                                if (decimal.TryParse(row[columnName].ToString(), out  value))
                                {
                                    row[newColumn] = value;
                                }
                                else
                                {
                                    row[newColumn] = 0m;
                                }
                            }
                            else
                            {
                                row[newColumn] = 0m;
                            }
                        }

                        // 删除原列并重命名新列
                        dataTable.Columns.Remove(columnName);
                        newColumn.ColumnName = columnName;
                    }
                }
                else
                {
                    continue;
                }
            }
        }

    }
}