using Microsoft.AspNetCore.Mvc.RazorPages;
using Snootalogue.Data;
using Microsoft.AspNetCore.Mvc;
using System.Net;
using System.Linq;
using System.IO;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using Snootalogue.ViewModels;
using Snootalogue.Models;

namespace Snootalogue.Pages {
	public class UploadModel : PageModel {
		private readonly SnootalogueContext _context;
		[BindProperty]
		public UploadDocument ud { get; set; }

		public UploadModel(SnootalogueContext context) {
			_context = context;
		}

		[HttpPost]
		// [DisableFormValueModelBinding]
		// [ValidateAntiForgeryToken]
		public async Task<IActionResult> OnPostAsync(UploadDocument ud) {

			if (!ModelState.IsValid) {
				return Page();
			}

			if (ud.UploadedFile == null) {
				return Page();
			}

			var id = Document.NewID(_context);
			// var uploadDirectory = Path.Combine(filename);
			var uploadDirectory = Path.Combine("wwwroot", "Content");
			var destination = Path.Combine(uploadDirectory, $"{id}.pdf");

			using (var fs = new FileStream(destination, FileMode.Create)) {
				await ud.UploadedFile.CopyToAsync(fs);
			}

			// Document d = _context.Document.
			Document d = new Document {
				ID = id,
				Title = ud.Title,
				Authors = ud.Authors.Split(",").ToList<string>(),
				Category = ud.Category,
				Tags = string.IsNullOrWhiteSpace(ud.Tags) ? null : ud.Tags.Split(",").ToList<string>(),
				Notes = ud.Notes,
				Read = ud.Read,
				Filename = WebUtility.HtmlEncode(ud.UploadedFile.FileName)
			};

			_context.Document.Add(d);

			try {
				await _context.SaveChangesAsync();
			}
			catch (DbUpdateConcurrencyException e) {
				// TODO: handle it like https://github.com/dotnet/AspNetCore.Docs/blob/master/aspnetcore/tutorials/razor-pages/razor-pages-start/sample/RazorPagesMovie30/Pages/Movies/Edit.cshtml.cs#L56
				throw e;
			}

			return RedirectToPage("/Index");
		}
	}

}