from datetime import datetime, date

from . import kernel, arch, hal

@"Kernel Version"
@readonly
def lunaix_ver() -> str:
    """
    Lunaix kernel version
    """
    
    today = date.today()
    year = today.year
    start_of_year = datetime(year, 1, 1).date()
    seq_num = (today - start_of_year).days
    
    return "%s v0.%d%d"%(arch.val, year - 2000, seq_num)

@"Kernel Debug and Testing"
def debug_and_testing():
    """
    General settings for kernel debugging feature
    """

    @"Supress assertion"
    def no_assert() -> bool:
        """
        Supress all assertion fail activity.
        Note: Enable this is highly NOT recommended and would result system
              extermly unstable
        """

        return False

    @"Report on stalled thread"
    def check_stall() -> bool:
        """
        Check and report on any thread that spend too much time in kernel.
        """

        return True
        
    @"Max kernel time allowance"
    def stall_timeout() -> int:
        """
        Set the maximum time (in seconds) spent in kernel before considered
        to be stalled.
        """
        require(check_stall)

        return 10
    
    @"Max number of preemptions"
    def stall_max_preempts() -> int:
        """
        Set the maximum number of preemptions that a task can take
        before it is considered to be stucked in some loops.

        Setting it to 0 disable this check
        """
        require(check_stall)

        return 0