using Magicodes.ExporterAndImporter.Core.Extension;
using Magicodes.ExporterAndImporter.Core.Models;
using Magicodes.ExporterAndImporter.Excel;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using Wood.Entity;
using Wood.Service.SystemManage.Param;

namespace Wood.Service
{
	/// <summary>
	/// service基础类
	/// </summary>
	public class ApiService : ControllerBase
	{
		protected async Task<FileStreamResult> ExportFile<T>(ICollection<T> dtos,string fileName) where T : class, new()
		{
			var excelExporter = HttpContext.RequestServices.GetRequiredService<IExcelExporter>();
			var res = await excelExporter.ExportAsByteArray(dtos);
			return new FileStreamResult(new MemoryStream(res), "application/octet-stream") { FileDownloadName = DateTime.Now.ToString("yyyyMMddHHmm") +"_"+ fileName };
		}

		protected async Task<ImportResult<T>> ImportFile<T>(IFormFile file,List<ImportErrorDto> errors) where T : class, new()
		{
			var excelImporter = HttpContext.RequestServices.GetRequiredService<IExcelImporter>();

			ImportResult<T> result = await excelImporter.Import<T>(file.OpenReadStream());
			if (result.HasError)
			{
				foreach (var item in result.RowErrors)
					errors.Add(new ImportErrorDto { Index = item.RowIndex, Errors = string.Join(';', item.FieldErrors.Values.ToArray()) });
				foreach (var item in result.TemplateErrors)
					errors.Add(new ImportErrorDto { Index = 0, Errors = item.RequireColumnName + "," + item.Message });
			}

			return result;
		}
	}
}