using GB5Shared.FileUpload;
using Microsoft.AspNetCore.Mvc;

namespace FrameworkSL.Controllers.FileUpload
{
    [ApiController]
    [Route("api/upload")]
    public class UploadService : ControllerBase
    {
        private readonly FileStorage _store;

        public UploadService(FileStorage store)
        {
            _store = store;
        }

        [HttpPost("excel")]
        public async Task<UploadResponse> UploadExcel(IFormFile file)
            => await Save(file, "excel");

        [HttpPost("csv")]
        public async Task<UploadResponse> UploadCsv(IFormFile file)
            => await Save(file, "csv");

        [HttpPost("pdf")]
        public async Task<UploadResponse> UploadPdf(IFormFile file)
            => await Save(file, "pdf");

        [HttpPost("bulk")]
        public async Task<object> UploadBulk(List<IFormFile> files)
        {
            var results = new List<UploadResponse>();

            foreach (var file in files)
                results.Add(await Save(file, "bulk"));

            return new
            {
                success = true,
                message = $"Uploaded {results.Count} files",
                results
            };
        }
        [HttpGet("pdf/{fileId}")]
        public IActionResult GetPdf(string fileId)
        {
            var folder = "pdf";
            var root = Path.Combine(Directory.GetCurrentDirectory(), "data", folder);

            if (!Directory.Exists(root))
                return NotFound("Folder not found");

            var filePath = Directory.GetFiles(root, $"{fileId}_*").FirstOrDefault();

            if (filePath == null)
                return NotFound("File not found");

            var bytes = System.IO.File.ReadAllBytes(filePath);

            return File(
                bytes,
                "application/pdf",
                Path.GetFileName(filePath)
            );
        }

        private async Task<UploadResponse> Save(IFormFile file, string folder)
        {
            if (file == null || file.Length == 0)
                return UploadResponse.Fail("Empty file");

            var id = await _store.SaveAsync(
                file.OpenReadStream(),
                file.FileName,
                folder
            );

            return UploadResponse.Ok(id);
        }
    }
}