using ServerCore; using ServerBase;


namespace ServerBase;

public class DailyTimeTask
{
    public Func<Task> m_task { get; init; } = null!;
    public DateTime m_time { get; init; } = DateTimeHelper.MinTime;
    public bool m_is_first_run { get; set; } = false;
}

public class DailyTimeEventManager
{
    private static readonly Lazy<DailyTimeEventManager> m_instance = new(() => new DailyTimeEventManager());
    public static DailyTimeEventManager Instance => m_instance.Value;

    private Dictionary<string, DailyTimeTask> m_tasks { get; set; } = new();

    public Result tryAddTask(string taskName, DateTime time, Func<Task> task, bool isFirstRun = false)
    {
        var result = new Result();

        var is_add = m_tasks.TryAdd(taskName, new DailyTimeTask { m_task = task, m_time = time, m_is_first_run = isFirstRun});
        if (! is_add)
        {
            var err_msg = $"fail to add daily time event !! already added - taskName: {taskName} / time: {time}";
            result.setFail(ServerErrorCode.DailyTimeEventAdditionFailed, err_msg);
            Log.getLogger().error(result.toBasicString());
        }

        return result;
    }
    public async Task runTimeEvents()
    {
        try
        {
            foreach (var task in m_tasks)
            {
                if (!checkEventTime(task.Value.m_time) && task.Value.m_is_first_run) continue;
                m_tasks[task.Key].m_is_first_run = true;

                // fire and forget
                _ = Task.Run(task.Value.m_task);
            }
        }
        catch (Exception e)
        {
            var err_msg = $"fail to run daily time event !! - {e}";
            Log.getLogger().error(err_msg);
        }

        await Task.CompletedTask;
    }

    private bool checkEventTime(DateTime time)
    {
        var current = DateTimeHelper.Current;
        
        // Hour check
        if (current.Hour != time.Hour) return false;
        
        // Minute check
        if (current.Minute != time.Minute) return false;
        
        // seconds check
        if (current.Second != time.Second) return false;

        return true;
    }
}