namespace YLErp.DBModels
{
    /// <summary>
    /// 保证金配置期限常量定义
    /// </summary>
    public static class ConsMarginTerm
    {
        /// <summary>
        /// 默认期限（空字符串）
        /// </summary>
        public const string Default = "";
        
        /// <summary>
        /// 2年期
        /// </summary>
        public const string TwoYear = "2Y";
        
        /// <summary>
        /// 5年期
        /// </summary>
        public const string FiveYear = "5Y";
        
        /// <summary>
        /// 10年期
        /// </summary>
        public const string TenYear = "10Y";
        
        /// <summary>
        /// 30年期
        /// </summary>
        public const string ThirtyYear = "30Y";
        
        /// <summary>
        /// 30年以上期
        /// </summary>
        public const string OverThirtyYear = "Over30Y";
        
        /// <summary>
        /// 所有允许的期限值
        /// </summary>
        public static readonly List<string> AllowedTerms = new List<string>
        {
            Default,
            TwoYear,
            FiveYear,
            TenYear,
            ThirtyYear,
            OverThirtyYear
        };
        
        /// <summary>
        /// 验证期限是否有效
        /// </summary>
        /// <param name="term">期限值</param>
        /// <returns>是否有效</returns>
        public static bool IsValidTerm(string term)
        {
            return AllowedTerms.Contains(term ?? string.Empty);
        }
        
        /// <summary>
        /// 获取期限的显示名称
        /// </summary>
        /// <param name="term">期限值</param>
        /// <returns>显示名称</returns>
        public static string GetDisplayName(string term)
        {
            return term switch
            {
                Default => "默认",
                TwoYear => "2年",
                FiveYear => "5年",
                TenYear => "10年",
                ThirtyYear => "30年",
                OverThirtyYear => "30年以上",
                _ => term?.Replace("Y", "年") ?? "默认"
            };
        }
    }
}