using Fake.Application;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Oms.Application.Dtos.Xhs;
using Oms.Application.Shared;
using Oms.Domain.CustomersAggregate.Repositories;
using Oms.Domain.XhsAggregate.Entities;
using Oms.Domain.XhsAggregate.Repositories;

namespace Oms.Application.Services.Xhs;

[ApiExplorerSettings(GroupName = "OMS-Xhs")]
public class XhsMediaService : ApplicationService
{
    private IXhsMediaRepository MediaRepository => LazyServiceProvider.GetRequiredService<IXhsMediaRepository>();
    private ICustomerRepository CustomerRepository => LazyServiceProvider.GetRequiredService<ICustomerRepository>();
    private IWebHostEnvironment WebHostEnvironment => LazyServiceProvider.GetRequiredService<IWebHostEnvironment>();

    /// <summary>
    /// 上传媒体文件
    /// </summary>
    [HttpPost("/xhs/media/upload")]
    public async Task<XhsMediaUploadOutput> UploadAsync(IFormFile file)
    {
        if (file == null || file.Length == 0)
        {
            throw new BusinessException("请选择文件");
        }

        var customerId = await OmsSessionHelper.ResolveXhsCustomerIdAsync(CustomerRepository, CurrentUser);
        var uploadsRoot = Path.Combine(WebHostEnvironment.WebRootPath ?? "wwwroot", "uploads", "xhs", customerId.ToString());
        Directory.CreateDirectory(uploadsRoot);

        var ext = Path.GetExtension(file.FileName);
        var storedName = $"{Guid.NewGuid():N}{ext}";
        var fullPath = Path.Combine(uploadsRoot, storedName);
        await using (var stream = File.Create(fullPath))
        {
            await file.CopyToAsync(stream);
        }

        var relativePath = Path.Combine("uploads", "xhs", customerId.ToString(), storedName).Replace('\\', '/');
        var publicUrl = $"/{relativePath}";

        var media = new XhsMedia
        {
            CustomerId = customerId,
            FileName = file.FileName,
            StoragePath = relativePath,
            PublicUrl = publicUrl,
            MimeType = file.ContentType,
            FileSizeBytes = file.Length
        };
        await MediaRepository.InsertAsync(media);

        return new XhsMediaUploadOutput
        {
            MediaId = media.Id,
            PublicUrl = publicUrl
        };
    }
}