using SharedKernel.Extensions;
using Application.Abstractions.Messaging;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using Domain.Entities.Forum.ValueObject;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace Admin.Pages.Forum.Posts.List;

public class WriteModel(IMediator mediator) : PageModel
{
    public string? ReturnUrl { get; set; }
    public List<SelectListItem> BoardList { get; set; } = [];

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

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

        [DisplayName("말머리")]
        public int? BoardPrefixID { 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")]
        public string? Content { get; set; }

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

        [DisplayName("첨부파일")]
        public List<IFormFile>? Files { get; set; }

        [DisplayName("태그")]
        public string? TagsInput { 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(CancellationToken ct)
    {
        var boards = await mediator.Send(new SearchBoards.Query(null, null, 1, 500), ct);
        BoardList = [..boards.List.Select(c => new SelectListItem
        {
            Value = c.ID.ToString(),
            Text = $"[{c.BoardGroupName}] {c.Name}"
        })];

        ReturnUrl = Request.Headers.Referer.ToString();
    }

    public async Task<IActionResult> OnGetPrefixesAsync(int boardID, CancellationToken ct)
    {
        var result = await mediator.Send(new GetBoardPrefixes.Query(boardID), ct);
        var items = result.List.Where(c => c.IsActive).Select(c => new { id = c.ID, name = c.Name });

        var metaResult = await mediator.Send(new GetBoardMeta.Query(boardID), ct);
        if (metaResult.IsFailure)
        {
            return new JsonResult(new { items, isQnA = false });
        }

        var isQnA = metaResult.Value.List.Layout == BoardLayout.QnA;

        return new JsonResult(new { items, isQnA });
    }

    public async Task<IActionResult> OnPostAsync(CancellationToken ct)
    {
        if (!ModelState.IsValid)
        {
            TempData["ErrorMessages"] = ModelState.GetErrorMessages();
            return RedirectToPage("/Forum/Posts/List/Write");
        }

        var tags = string.IsNullOrWhiteSpace(Input.TagsInput)
            ? null
            : Input.TagsInput.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries).ToList();

        var result = await mediator.Send(new CreatePost.Command(
            Input.BoardID,
            Input.BoardPrefixID,
            Input.Subject,
            Input.Content,
            Input.ThumbnailFile,
            Input.Files,
            tags,
            Input.IsNotice,
            Input.IsSecret,
            Input.IsAnonymous
        ), ct);

        if (result.IsFailure)
        {
            TempData["ErrorMessages"] = result.Error.Description;
            return RedirectToPage("/Forum/Posts/List/Write");
        }

        TempData["SuccessMessage"] = "게시글이 등록되었습니다.";
        return RedirectToPage("/Forum/Posts/List/Index");
    }
}