using Microsoft.AspNetCore.Diagnostics;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace JobTrackerApi.Services;

public sealed class RevisionConflictExceptionHandler : IExceptionHandler
{
    public async ValueTask<bool> TryHandleAsync(HttpContext context, Exception exception, CancellationToken cancellationToken)
    {
        if (exception is not DbUpdateConcurrencyException) return false;
        context.Response.StatusCode = StatusCodes.Status409Conflict;
        await context.Response.WriteAsJsonAsync(new ProblemDetails
        {
            Status = StatusCodes.Status409Conflict,
            Title = "The record changed",
            Detail = "Your draft was not saved. Reload and review the current record before saving again.",
            Extensions = { ["code"] = "revision_conflict" },
        }, cancellationToken);
        return true;
    }
}