namespace DramaLing.Api.Services.Infrastructure.Caching;

public class CacheStrategyManager : ICacheStrategyManager
{
    public TimeSpan CalculateSmartExpiry<T>(string key, T value) where T : class
    {
        return key switch
        {
            var k when k.StartsWith("analysis:") => TimeSpan.FromHours(2),   // AI 分析結果快取2小時
            var k when k.StartsWith("user:") => TimeSpan.FromMinutes(30),    // 用戶資料快取30分鐘
            var k when k.StartsWith("flashcard:") => TimeSpan.FromMinutes(15), // 詞卡資料快取15分鐘
            var k when k.StartsWith("stats:") => TimeSpan.FromMinutes(5),    // 統計資料快取5分鐘
            _ => TimeSpan.FromMinutes(10) // 預設快取10分鐘
        };
    }

    public TimeSpan CalculateMemoryExpiry(string key)
    {
        return key switch
        {
            var k when k.StartsWith("analysis:") => TimeSpan.FromMinutes(30),
            var k when k.StartsWith("user:") => TimeSpan.FromMinutes(10),
            var k when k.StartsWith("flashcard:") => TimeSpan.FromMinutes(5),
            var k when k.StartsWith("stats:") => TimeSpan.FromMinutes(2),
            _ => TimeSpan.FromMinutes(5)
        };
    }
}