namespace New.Application.WriteThrough;

/// <summary>
/// A single portal-shaped field error, after the write-through translator has
/// mapped a legacy `veld`/`code`/`melding` triple. <see cref="Detail"/> only
/// carries the raw legacy message, and only for codes the translator did not
/// recognize - see the translator's class-level comment on why it must never
/// invent business meaning for a code it doesn't know.
/// </summary>
public sealed record PortalFieldError(string Field, string Message, string? Detail = null);

public enum WriteThroughOutcomeKind
{
    Success,
    ValidationFailed,
    Conflict,
    NotFound,
}

public sealed record WriteThroughOutcome(WriteThroughOutcomeKind Kind, IReadOnlyList<PortalFieldError>? Errors = null)
{
    public static readonly WriteThroughOutcome Success = new(WriteThroughOutcomeKind.Success);
    public static readonly WriteThroughOutcome Conflict = new(WriteThroughOutcomeKind.Conflict);
    public static readonly WriteThroughOutcome NotFound = new(WriteThroughOutcomeKind.NotFound);

    public static WriteThroughOutcome ValidationFailed(IReadOnlyList<PortalFieldError> errors) =>
        new(WriteThroughOutcomeKind.ValidationFailed, errors);
}