using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;

namespace Lskj.Control.Model
{
    public static class DatabaseFormatJudgment
    {

        /// <summary>
        /// <para>说明：保存和修改的验证</para>
        /// <para>创建人：曹屹峰</para>
        /// <para>创建日期：2021-9-13 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <param name="TableProperties">数据库的表格属性表</param>
        /// <param name="model">控件对象</param>
        /// <para>版本：1.0</para>
        /// </summary>
        public static string SaveOrModifyBalidation(DataTable TableProperties, ControlModel model, string fieldValue)
        {

            if (fieldValue==null) return "";
            string SaveErrorMessage = string.Empty;//报错信息
            string LengthPrompt = string.Empty;//长度提示
            int MaxInputLength = 0;
            if (TableProperties.Rows.Count == 0) return "";
            DataRow[] ListOfAttributes = TableProperties.Select("COLUMN_NAME='" + model.FieldName + "'");
            if (ListOfAttributes.Length == 0) return "";
            //判断长度
            if (ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("varchar"))
            {
                if (int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) == -1)
                {
                    ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] = 8000;
                }
                MaxInputLength = System.Text.Encoding.Default.GetBytes(fieldValue).Length;
                LengthPrompt = string.Format("该字段最长{0}个英文或数字，或{1}个汉字", ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] + "", int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] + "") / 2);
            }
            else if (ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("nvarchar"))
            {
                if (int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) == -1)
                {
                    ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] = 4000;
                }
                MaxInputLength = fieldValue.Length;
                LengthPrompt = string.Format("该字段最长{0}个汉字（英文或数字）", ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] + "");
            }
            if (!string.IsNullOrWhiteSpace(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) && int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) < MaxInputLength)
            {
                SaveErrorMessage = model.LabelText + "~" + model.FieldName + ": 输入内容长度超出限制," + LengthPrompt + "\r\n";
            }
            //判断属性是否正确
            if ((ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("int") || ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("decimal")) &&!IsNumberic(fieldValue))
            {
                if (model.IsEmpty)
                {
                    SaveErrorMessage =   SaveErrorMessage + model.LabelText + "~" + model.FieldName + ": 数据格式错误;\r\n";
                }
                else {
                    model.Isintordecimal = true;
                    //输入值不为数值
                    if (!string.IsNullOrEmpty(fieldValue)) 
                    {
                        SaveErrorMessage =   SaveErrorMessage + model.LabelText + "~" + model.FieldName + ": 数据格式错误;\r\n";
                    }
                }
            }
            return SaveErrorMessage;

        }

        /// <summary>
        /// <para>说明：保存和修改的验证</para>
        /// <para>创建人：曹屹峰</para>
        /// <para>创建日期：2021-9-13 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// <param name="_detailColumns">明细列或表格列</param>
        /// <param name="TableProperties">数据库的表格属性表</param>
        /// <param name="row">修改或保存行</param>
        /// <param name="row">修改或保存列</param>
        /// <param name="row">修改或保存值</param>
        /// </summary>
        public static string SaveOrModifyBalidation(DataTable _detailColumns, DataTable TableProperties, DataRow row, DataColumn col, string fieldValue)
        {
            if (fieldValue == null) return "";
            if (!row.Table.Columns.Contains(col.ColumnName)) return "";
            if (TableProperties.Rows.Count == 0) return "";
            DataRow hasContainRow = _detailColumns.Rows.Cast<DataRow>().FirstOrDefault(x => (x["fieldname"] + "").ToLower() == col.ColumnName.ToLower());
            if (hasContainRow == null) return "";
            DataRow[] ListOfAttributes = TableProperties.Select("COLUMN_NAME='" + col.ColumnName + "'");
            if (ListOfAttributes == null || ListOfAttributes.Length == 0) return "";
            string saveErrorMessage = string.Empty;//报错信息
            string LengthPrompt = string.Empty;//长度提示
            int MaxInputLength = 0;
            //判断长度是否超出
            if (ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("varchar"))
            {
                if (int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) == -1)
                {
                    ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] = 8000;
                }
                MaxInputLength = System.Text.Encoding.Default.GetBytes((row[col.ColumnName] + "").Replace("'", "''")).Length;
                LengthPrompt = string.Format("该字段最长{0}个英文或数字，或{1}个汉字", ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] + "", int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] + "") / 2);
            }
            else if (ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("nvarchar"))
            {
                if (int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) == -1)
                {
                    ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] = 4000;
                }
                MaxInputLength = (row[col.ColumnName] + "").Replace("'", "''").Length;
                LengthPrompt = string.Format("该字段最长{0}个汉字（英文或数字）", ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] + "");
            }
            if (!string.IsNullOrWhiteSpace(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) && int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) < MaxInputLength)
            {
                saveErrorMessage = saveErrorMessage + hasContainRow["username"].ToString() + "~" + col.ColumnName + ": 输入内容长度超出限制,"+ LengthPrompt + "\r\n";
            }
            //判断属性是否正确
            if ((ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("int") || ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("decimal")) && !IsNumberic((row[col.ColumnName] + "").Replace("'", "''")) && !string.IsNullOrWhiteSpace((row[col.ColumnName] + "")))
            {
                saveErrorMessage = saveErrorMessage + hasContainRow["username"].ToString() + "~" + col.ColumnName + ": 数据格式错误,请输入数值;\r\n";
            }

            return saveErrorMessage;
        }


        /// <summary>
        /// <para>说明：保存和修改的验证</para>
        /// <para>创建人：曹屹峰</para>
        /// <para>创建日期：2021-9-13 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        public static string SaveOrModifyBalidation(DataTable TableProperties, DataRow row, DataColumn col, string fieldValue)
        {

            if (!row.Table.Columns.Contains(col.ColumnName) || row == null) return "";
            if (TableProperties.Rows.Count == 0) return "";

            DataRow[] ListOfAttributes = TableProperties.Select("COLUMN_NAME='" + col.ColumnName + "'");
            if (ListOfAttributes == null || ListOfAttributes.Length == 0)
            {
                return "";
            }
            string saveErrorMessage = string.Empty;//报错信息
            string LengthPrompt = string.Empty;//长度提示
            int MaxInputLength = 0;
            //判断长度是否超出
            if (ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("varchar"))
            {
                if (int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) == -1)
                {
                    ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] = 8000;
                }
                MaxInputLength = System.Text.Encoding.Default.GetBytes((row[col.ColumnName] + "").Replace("'", "''")).Length;
                LengthPrompt = string.Format("该字段最长{0}个英文或数字，或{1}个汉字", ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] + "", int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] + "") / 2);
            }
            else if (ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("nvarchar"))
            {
                if (int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) == -1)
                {
                    ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] = 4000;
                }
                MaxInputLength = (row[col.ColumnName] + "").Replace("'", "''").Length;
                LengthPrompt = string.Format("该字段最长{0}个汉字（英文或数字）", ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"] + "");
            }
            if (!string.IsNullOrWhiteSpace(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) && int.Parse(ListOfAttributes[0]["CHARACTER_MAXIMUM_LENGTH"].ToString()) < MaxInputLength)
            {
                saveErrorMessage = saveErrorMessage + col.ColumnName + ": 输入内容长度超出限制," + LengthPrompt + "\r\n";
            }
            //判断属性是否正确
            if ((ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("int") || ListOfAttributes[0]["DATA_TYPE"].ToString().Equals("decimal")) && !IsNumberic((row[col.ColumnName] + "").Replace("'", "''")) && !string.IsNullOrWhiteSpace((row[col.ColumnName] + "")))
            {
                saveErrorMessage = saveErrorMessage + "~" + col.ColumnName + ": 数据格式错误,请输入数值;\r\n";
            }
            return saveErrorMessage;
        }


        /// <summary>
        /// 判断输入的字符串是否可以转换成数值类型
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsNumberic(string str)
        {
            double vsNum;
            bool isNum;
            isNum = double.TryParse(str, System.Globalization.NumberStyles.Float,
                System.Globalization.NumberFormatInfo.InvariantInfo, out vsNum);
            if (string.IsNullOrWhiteSpace(str)) isNum = false;
            return isNum;
        }
    }
}