using Application.Abstractions.Messaging;
using Application.Features.Api.Forum.StockBoard.CreatePost;
using Web.Api.Common;
using Web.Api.Extensions;
using Microsoft.AspNetCore.Mvc;
using System.Security.Claims;

namespace Web.Api.Endpoints.Forum.StockBoard;

/// <summary>종목 가상보드 글 작성 — POST /api/boards/stock/posts (JWT). 예측(선택) 동시 등록.</summary>
internal sealed class CreatePost : IEndpoint
{
    public sealed class PredictionBody
    {
        public byte Direction { get; set; }
        public short HorizonDays { get; set; }
        public decimal? TargetPrice { get; set; }
    }

    public sealed class Request
    {
        public string StockCode { get; set; } = "";
        public string Subject { get; set; } = "";
        public string Content { get; set; } = "";
        public PredictionBody? Prediction { get; set; }
    }

    public void MapEndpoint(IEndpointRouteBuilder app)
    {
        app.MapPost("api/boards/stock/posts", async (
            ClaimsPrincipal user,
            [FromBody] Request request,
            ISender sender,
            CancellationToken ct
        ) => {
            var memberID = user.GetMemberID();
            if (memberID is null)
            {
                return ApiResponse.Fail(StatusCodes.Status401Unauthorized, "Invalid token");
            }

            var prediction = request.Prediction is { } p
                ? new PredictionInput(p.Direction, p.HorizonDays, p.TargetPrice)
                : null;

            var command = new Command(memberID.Value, request.StockCode, request.Subject, request.Content, prediction);

            var result = await sender.Send(command, ct);

            return result.Match(
                postID => ApiResponse.Created(new { ID = postID }),
                CustomResults.Problem
            );
        })
        .WithTags("StockBoard")
        .RequireAuthorization();
    }
}