namespace Connected.Data.Schema.Sql
{
    public enum IndexType
    {
        Index = 1,
        Unique = 2,
        PrimaryKey = 3
    }
    internal class ObjectIndex
    {
        public string Name { get; set; }
        public string Description { get; set; }
        public string Keys { get; set; }

        public IndexType Type
        {
            get
            {
                var tokens = Description.Split(',');
                var result = IndexType.Index;

                foreach (var token in tokens)
                {
                    if (token.Trim().Contains("primary key", StringComparison.OrdinalIgnoreCase))
                        return IndexType.PrimaryKey;
                    else if (string.Compare(token.Trim(), "unique", true) == 0)
                        result = IndexType.Unique;
                }

                return result;
            }
        }

        public bool IsReferencedBy(string column)
        {
            return Columns.Contains(column, StringComparer.OrdinalIgnoreCase);
        }

        public List<string> Columns
        {
            get
            {
                var result = new List<string>();
                var tokens = Keys.Split(',');

                foreach (var token in tokens)
                    result.Add(token.Trim());

                return result;
            }
        }
    }
}