using System.Collections.Concurrent;
using Util.Data.Sql.Builders;
using Util.Data.Sql.Builders.Caches;

namespace Util.Data.Sql.Tests.Samples; 

/// <summary>
/// 测试列缓存
/// </summary>
public class TestColumnCache : ColumnCacheBase {
    /// <summary>
    /// 列名缓存
    /// </summary>
    private readonly ConcurrentDictionary<int, string> _cache;

    /// <summary>
    /// 初始化测试列缓存
    /// </summary>
    public TestColumnCache() : this( TestDialect.Instance ) {
    }

    /// <summary>
    /// 初始化测试列缓存
    /// </summary>
    public TestColumnCache( IDialect dialect ) : base( dialect ) {
        _cache = new ConcurrentDictionary<int, string>();
    }

    /// <summary>
    /// 测试列缓存实例
    /// </summary>
    public static readonly IColumnCache Instance = new TestColumnCache();

    /// <summary>
    /// 从缓存中获取处理后的列集合
    /// </summary>
    /// <param name="columns">列集合</param>
    public override string GetSafeColumns( string columns ) {
        return _cache.GetOrAdd( columns.GetHashCode(), key => NormalizeColumns( columns ) );
    }

    /// <summary>
    /// 从缓存中获取处理后的列
    /// </summary>
    /// <param name="column">列</param>
    public override string GetSafeColumn( string column ) {
        return _cache.GetOrAdd( column.GetHashCode(), key => NormalizeColumn( column ) );
    }
}