using Furion;
using Furion.HttpRemote;
using MiniExcelLibs;
using MiniExcelLibs.Attributes;
using MiniExcelLibs.OpenXml;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace FlexJobApi.Core
{
    /// <summary>
    /// Excel工具
    /// </summary>
    public static class ExcelUtils
    {
        public static async Task<List<T>> ImportExcelFromOSS<T>(this string url)
            where T : class, new()
        {
            var config = new OpenXmlConfiguration();
            var xmlDoc = await XmlDocUtils.GetXmlDocAsync();
            config.DynamicColumns = typeof(T).GetProperties().Select(it =>
            {
                var column = new DynamicExcelColumn(it.Name)
                {
                    Name = it.GetXmlDocMemberAsync(xmlDoc).Result.Summary,
                    Ignore = it.GetCustomAttribute<JsonIgnoreAttribute>() != null
                };
                return column;
            }).ToArray();
            url = AliyunOSSUtils.GetUrl(url);
            var stream = await App.GetRequiredService<IHttpRemoteService>().GetAsStreamAsync(url);

            var query = await MiniExcel.QueryAsync<T>(stream, configuration: config);
            return query.ToList();
        }

        public static async Task<string> ExportExcelToOSS<T>(this List<T> models, string scene, string filename)
            where T : class, new()
        {
            var xmlDoc = await XmlDocUtils.GetXmlDocAsync();
            var config = new OpenXmlConfiguration();
            config.TableStyles = TableStyles.None;
            config.AutoFilter = false;
            config.DynamicColumns = typeof(T).GetProperties().Select(it =>
            {
                var propertyType = it.PropertyType;
                if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(Nullable<>))
                {
                    propertyType = propertyType.GetGenericArguments()[0];
                }
                var column = new DynamicExcelColumn(it.Name)
                {
                    Name = it.GetXmlDocMemberAsync(xmlDoc).Result.Summary,
                    Ignore = it.GetCustomAttribute<JsonIgnoreAttribute>() != null,
                    CustomFormatter = v =>
                    {
                        if (propertyType.IsEnum)
                        {
                            var models = EnumUtils.GetModel(propertyType).Result;
                            var enumValue = (int)v;
                            var model = models.Items.FirstOrDefault(i => i.Value == enumValue);
                            return model?.Description;
                        }
                        return v;
                    }
                };
                return column;
            }).ToArray();
            var stream = new MemoryStream();
            await MiniExcel.SaveAsAsync(stream, models, configuration: config);
            stream.Seek(0, SeekOrigin.Begin);
            return AliyunOSSUtils.Upload(scene, stream, filename);
        }
    }
}