using System;
using System.Collections.Generic;

namespace MxGateway.Worker.Bootstrap;

public static class WorkerLogRedactor
{
    public const string RedactedValue = "[redacted]";

    private static readonly string[] SensitiveFieldNameParts =
    [
        "nonce",
        "secret",
        "password",
        "token",
        "credential",
        "apikey",
        "api_key",
    ];

    public static Dictionary<string, object?> RedactFields(IReadOnlyDictionary<string, object?> fields)
    {
        Dictionary<string, object?> redactedFields = [];

        foreach (KeyValuePair<string, object?> field in fields)
        {
            redactedFields[field.Key] = RedactValue(field.Key, field.Value);
        }

        return redactedFields;
    }

    public static object? RedactValue(string fieldName, object? value)
    {
        if (value is null)
        {
            return null;
        }

        foreach (string sensitiveFieldNamePart in SensitiveFieldNameParts)
        {
            if (fieldName.IndexOf(sensitiveFieldNamePart, StringComparison.OrdinalIgnoreCase) >= 0)
            {
                return RedactedValue;
            }
        }

        return value;
    }
}