using System;

namespace StellaOps.Provcache;

/// <summary>
/// Builder for constructing <see cref="DecisionDigest"/> from evaluation results.
/// Ensures deterministic digest computation for cache consistency.
/// </summary>
public sealed partial class DecisionDigestBuilder
{
    private string? _veriKey;
    private string? _verdictHash;
    private string? _proofRoot;
    private ReplaySeed? _replaySeed;
    private DateTimeOffset? _createdAt;
    private DateTimeOffset? _expiresAt;
    private int? _trustScore;
    private TrustScoreBreakdown? _trustScoreBreakdown;
    private readonly ProvcacheOptions _options;
    private readonly TimeProvider _timeProvider;

    /// <summary>
    /// Creates a new DecisionDigestBuilder with default options.
    /// </summary>
    public DecisionDigestBuilder() : this(new ProvcacheOptions(), TimeProvider.System)
    {
    }

    /// <summary>
    /// Creates a new DecisionDigestBuilder with the specified options.
    /// </summary>
    /// <param name="options">Provcache configuration options.</param>
    /// <param name="timeProvider">Time provider for timestamps.</param>
    public DecisionDigestBuilder(ProvcacheOptions options, TimeProvider? timeProvider = null)
    {
        _options = options ?? throw new ArgumentNullException(nameof(options));
        _timeProvider = timeProvider ?? TimeProvider.System;
    }
}