using PostFundManagement.Application.Abstractions.Services;
using PostFundManagement.Application.Extensions;
using PostFundManagement.Domain.Abstractions;
using PostFundManagement.Domain.Errors;
using PostFundManagement.Domain.Extensions;
using PostFundManagement.Domain.Security;
using Problems = Microsoft.AspNetCore.Mvc.ProblemDetails;

namespace PostFundManagement.Api.Endpoints.Grants;

[ApiVersionTarget(1)]
public sealed class UploadContractEndpoint : IEndpoint
{
    public void Map(IEndpointRouteBuilder builder)
    {
        builder.MapPost("api/grants/contracts/{contractId}", async (string contractId, HttpRequest request, IGrantsService service, 
            CancellationToken cancellationToken = default) =>
        {
            if (!request.HasFormContentType)
                return Results.BadRequest("Request must be a multipart form.");

            var form = await request.ReadFormAsync(cancellationToken);
            var file = form.Files.GetFile("file");

            if (file == null || file.Length == 0)
                return Results.BadRequest("No file uploaded or file is empty.");

            return await service.UploadContractAsync(contractId, request.HttpContext.GetUserId(), file, cancellationToken) switch
            {
                { IsSuccess: true } => Results.Ok(),
                var r when r.HasError<CreateError>() => Results.BadRequest(r.Errors.ToProblems()),
                var r => Results.InternalServerError(r.Errors.ToProblems())
            };
        })
        .WithDescription("Uploads a contract file securely")
        .RequireAuthorization(Constants.MainScope)
        .DisableAntiforgery()
        .WithName(typeof(UploadContractEndpoint).ToEndpointName())
        .MapToApiVersion(new ApiVersion(1))
        .Produces(StatusCodes.Status200OK)
        .Produces(StatusCodes.Status403Forbidden)
        .Produces(StatusCodes.Status401Unauthorized)
        .Produces(StatusCodes.Status404NotFound)
        .Produces<Problems>(StatusCodes.Status500InternalServerError)
        .WithTags(EndpointTags.Grants)
        .CacheOutput();
    }
}