using static System.Environment;

namespace InnovEnergy.Lib.S3Utils.Data;

public record S3Credentials
{
    protected static readonly String S3CfgFile = GetFolderPath(SpecialFolder.UserProfile).TrimEnd('\\', '/') + "/.s3cfg";
    
    public required String Key    { get; init; }
    public required String Secret { get; init; }

    public static S3Credentials? FromS3Cfg() => FromFile(S3CfgFile);
    
    public static S3Credentials? FromFile(String file)
    {
        // [default]
        // host_base = sos-ch-dk-2.exo.io
        // host_bucket = %(bucket)s.sos-ch-dk-2.exo.io
        // access_key = xxxxxxxxxxxxxxx
        // secret_key = xxxxxxxxxxxxxxx
        // use_https = True
        
        try
        {
            var cfg = ParseFile(file);

            return new S3Credentials
            {
                Key    = cfg["access_key"],
                Secret = cfg["secret_key"]
            };
        }
        catch
        {
            return null;
        }
    }

    protected static Dictionary<String, String> ParseFile(String cfgFile)
    {
        return File
              .ReadAllLines(cfgFile)
              .Where(l => l.Contains("="))
              .Select(l => l.Split("="))
              .ToDictionary(l => l[0].Trim(), l => l[1].Trim());
    }
}