using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.StaticFiles;

namespace CityInfo.API.Controllers
{
    [Route("api/files")]
    [Authorize]
    [ApiController]
    public class FilesController : ControllerBase
    {
        private readonly FileExtensionContentTypeProvider _fileExtensionContentTypeProvide;
        public FilesController(
            FileExtensionContentTypeProvider fileExtensionContentTypeProvider)
        {
            _fileExtensionContentTypeProvide = fileExtensionContentTypeProvider 
                ?? throw new System.ArgumentNullException(
                    nameof(FileExtensionContentTypeProvider));
        }
        [HttpGet("{fileId}")]
        public ActionResult GetFile(string fileId)
        {
            var pathToFile = "email_template.pdf";
            if (!System.IO.File.Exists(pathToFile))
            {
                return NotFound();
            }
            if (!_fileExtensionContentTypeProvide
                .TryGetContentType(pathToFile, out var contentType))
            {
                contentType = "application/octet-stream";
            }
            var bytes = System.IO.File.ReadAllBytes(pathToFile);
            return File(bytes, contentType , Path.GetFileName(pathToFile));
        }
        [HttpPost]
        public async Task<ActionResult> CreateFile(IFormFile file)
        {
            if(file.Length == 0 || file.Length > 20971520 || file.ContentType != "application/pdf")
            {
                return BadRequest("No file or an invalid one has been inputted.");
            }
            var path = Path.Combine(
                Directory.GetCurrentDirectory(),
                $"uploaded_file_{Guid.NewGuid()}.pdf");
            using (var stream = new FileStream(path, FileMode.Create))
            {
                await file.CopyToAsync(stream);
            }
            return Ok("Your file has been uploaded successfully.");
        }
    }
}