using SharedKernel.Extensions;
using MediatR;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace Admin.Pages.Forum.Posts.List
{
    public class EditModel(IMediator mediator) : PageModel
    {
        [BindProperty]
        public string? QueryString { get; set; }

        public string? ReturnUrl { get; set; }

        [BindProperty]
        public InputModel Input { get; set; } = new();

        public string? CurrentThumbnail { get; private set; }

        public sealed class InputModel
        {
            [DisplayName("ID")]
            [Required(ErrorMessage = "{0}은 필수입니다.")]
            public int ID { get; set; }

            public int BoardID { get; set; }

            [DisplayName("제목")]
            [Required(ErrorMessage = "{0}은 필수입니다.")]
            [StringLength(255, ErrorMessage = "{0}은 {1}자 이내로 입력하세요.")]
            public string Subject { get; set; } = null!;

            [DisplayName("내용")]
            [StringLength(8000, ErrorMessage = "{0}은 {1}자 이내로 입력하세요.")]
            public string? Content { get; set; }

            [DisplayName("대표 이미지")]
            public IFormFile? ThumbnailFile { get; set; }

            [DisplayName("공지")]
            public bool IsNotice { get; set; } = false;

            [DisplayName("비밀")]
            public bool IsSecret { get; set; } = false;

            [DisplayName("익명")]
            public bool IsAnonymous { get; set; } = false;

            public string? ReturnUrl { get; set; }
        }

        public async Task OnGetAsync(int id, CancellationToken ct)
        {
            var result = await mediator.Send(new GetPost.Query(id), ct);

            CurrentThumbnail = result.Thumbnail;
            ReturnUrl = Request.Headers.Referer.ToString();

            Input = new InputModel
            {
                ID = result.ID,
                BoardID = result.BoardID,
                Subject = result.Subject,
                Content = result.Content,
                IsNotice = result.IsNotice,
                IsSecret = result.IsSecret,
                IsAnonymous = result.IsAnonymous,
                ReturnUrl = ReturnUrl
            };

            QueryString = Request.QueryString.ToString();
        }

        public async Task<IActionResult> OnPostAsync(CancellationToken ct)
        {
            try
            {
                if (!ModelState.IsValid)
                {
                    throw new Exception(ModelState.GetErrorMessages());
                }

                await mediator.Send(new UpdatePost.Command(
                    Input.ID,
                    Input.Subject,
                    Input.Content,
                    Input.ThumbnailFile,
                    Input.IsNotice,
                    Input.IsSecret,
                    Input.IsAnonymous
                ), ct);

                TempData["SuccessMessage"] = "게시글이 수정되었습니다.";
            }
            catch (Exception e)
            {
                TempData["ErrorMessages"] = e.Message;
            }

            return Redirect($"/Forum/Posts/List/Edit/{Input.ID}{Request.QueryString}");
        }

        public async Task<IActionResult> OnPostDeleteAsync(CancellationToken ct)
        {
            try
            {
                await mediator.Send(new DeletePost.Command([Input.ID]), ct);

                TempData["SuccessMessage"] = "게시글이 삭제되었습니다.";

                return RedirectToPage("/Forum/Posts/List/Index");
            }
            catch (Exception e)
            {
                TempData["ErrorMessages"] = e.Message;

                return Redirect($"/Forum/Posts/List/Edit/{Input.ID}{Request.QueryString}");
            }
        }
    }
}