namespace NeonSprawl.Server.Game.Rewards;

/// <summary>Id normalization and composite keys for reward delivery stores (NEO-126).</summary>
public static class RewardDeliveryIds
{
    /// <summary>Trim + lowercase; empty when input is null/whitespace.</summary>
    public static string NormalizePlayerId(string? playerId)
    {
        var trimmed = playerId?.Trim();
        if (string.IsNullOrEmpty(trimmed))
        {
            return string.Empty;
        }

        return trimmed.ToLowerInvariant();
    }

    /// <summary>Trim + lowercase; empty when input is null/whitespace.</summary>
    public static string NormalizeQuestId(string? questId) => NormalizePlayerId(questId);

    /// <summary>Stable idempotency key for quest completion delivery.</summary>
    public static string MakeIdempotencyKey(string? playerId, string? questId)
    {
        var p = NormalizePlayerId(playerId);
        var q = NormalizeQuestId(questId);
        if (p.Length == 0 || q.Length == 0)
        {
            return string.Empty;
        }

        return $"{p}:quest_complete:{q}";
    }

    /// <summary>Composite store key for <paramref name="playerId"/> + <paramref name="questId"/>.</summary>
    public static string MakeStoreKey(string? playerId, string? questId)
    {
        var p = NormalizePlayerId(playerId);
        var q = NormalizeQuestId(questId);
        if (p.Length == 0 || q.Length == 0)
        {
            return string.Empty;
        }

        return $"{p}\0{q}";
    }
}