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

namespace ddq
{
    public class Utility
    {

        public static readonly Dictionary<int, string> RoleType = new Dictionary<int, string>
        {
            { 1, "Portfolio Manager" },
            { 2, "Researcher"},
            { 3, "Contactor"},
            { 4, "Marketing"},
            { 5, "Risk & Compliance"},
            { 6, "Executive"},
            { 7, "Legal"},
            { 8, "Trading"},
            { 9, "Technology"},
            { 0, "Other"}

        };


        /// <summary>
        /// JsonElment 转为字符串，若输入为空则输出""
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        public static string Json2Text(JsonElement jsonElement, string propertyName)
        {
            string str = "";
            JsonElement elm;

            if (propertyName == null) return str;

            bool hasProperty = jsonElement.TryGetProperty(propertyName, out elm);

            if (hasProperty == true && elm.ValueKind != JsonValueKind.Undefined)
            {
                str = elm.ToString().Trim();
            }

            return str;
        }

        public static DataTable Json2Table(JsonElement jsonElement)
        {
            DataTable dataTable = new DataTable();

            // 如果解析出的是数组
            if (jsonElement.ValueKind == JsonValueKind.Array)
            {
                // 遍历数组元素
                foreach (JsonElement element in jsonElement.EnumerateArray())
                {
                    // 如果是第一次遍历，元素包含列定义信息，需要创建列
                    if (dataTable.Columns.Count == 0)
                    {
                        // 遍历第一个对象的属性来创建列
                        foreach (JsonProperty property in element.EnumerateObject())
                        {
                            dataTable.Columns.Add(property.Name);
                        }
                    }

                    // 创建新行并填充数据
                    DataRow newRow = dataTable.NewRow();
                    foreach (JsonProperty property in element.EnumerateObject())
                    {
                        newRow[property.Name] = property.Value.ToString();
                    }
                    dataTable.Rows.Add(newRow);
                }
            }

            return dataTable;

        }

        public static List<Dictionary<string, object>> DataTable2List(DataTable dataTable)
        {
            var records = new List<Dictionary<string, object>>();

            foreach (DataRow row in dataTable.Rows)
            {
                var record = new Dictionary<string, object>();
                foreach (DataColumn col in dataTable.Columns)
                {
                    // 处理DBNull值
                    record[col.ColumnName] = row[col] == DBNull.Value ? null : row[col];
                }
                records.Add(record);
            }

            return records;
        }
    }


}