namespace TestProject1;

public static class TenantDbHelper
{
    /// <summary>
    /// Key-Value: {DbName}-{TenantKeyLessThan}
    /// </summary>
    public static Dictionary<string, int> DbList { get; set; } = new Dictionary<string, int>
    {
        { "cferp_test_1", 1000 },
        { "cferp_test_2", 2000 },
        { "cferp_test_3", int.MaxValue },
    };

    public static string GetDbNameByTenantKeyValue(int tenantKeyValue)
    {
        // var dictionary = new SortedDictionary<int, string>();
        // DbList.ForEach(pair => dictionary.Add(pair.Value, pair.Key));
        // 注意配置顺序
        var dbName = DbList.Cast<KeyValuePair<string, int>?>()
            .FirstOrDefault(pair => pair?.Value != null && pair.Value.Value > tenantKeyValue)!.Value.Key;
        return dbName ??
               throw new ArgumentOutOfRangeException(nameof(tenantKeyValue),
                   $"已配置的数据库中没有任何符合'{nameof(tenantKeyValue)}'值的对象");
    }
}