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'''
    Copyright (c) 2016 Tim Savannah All Rights Reserved.

    Licensed under the Lesser GNU Public License Version 3, LGPLv3. You should have recieved a copy of this with the source distribution as
    LICENSE, otherwise it is available at https://github.com/kata198/func_timeout/LICENSE
'''

__all__ = ('FunctionTimedOut', 'RETRY_SAME_TIMEOUT')

RETRY_SAME_TIMEOUT = 'RETRY_SAME_TIMEOUT'

class FunctionTimedOut(BaseException):
    '''
        FunctionTimedOut - Exception raised when a function times out

        @property timedOutAfter - Number of seconds before timeout was triggered

        @property timedOutFunction - Function called which timed out
        @property timedOutArgs - Ordered args to function
        @property timedOutKwargs - Keyword args to function

        @method retry - Retries the function with same arguments, with option to run with original timeout, no timeout, or a different
          explicit timeout. @see FunctionTimedOut.retry
    '''


    def __init__(self, msg='', timedOutAfter=None, timedOutFunction=None, timedOutArgs=None, timedOutKwargs=None):
        '''
            __init__ - Create this exception type.

                You should not need to do this outside of testing, it will be created by the func_timeout API

                    @param msg <str> - A predefined message, otherwise we will attempt to generate one from the other arguments.

                    @param timedOutAfter <None/float> - Number of seconds before timing-out. Filled-in by API, None will produce "Unknown"

                    @param timedOutFunction <None/function> - Reference to the function that timed-out. Filled-in by API." None will produce "Unknown Function"

                    @param timedOutArgs <None/tuple/list> - List of fixed-order arguments ( *args ), or None for no args.

                    @param timedOutKwargs <None/dict> - Dict of keyword arg ( **kwargs ) names to values, or None for no kwargs.

        '''

        self.timedOutAfter = timedOutAfter

        self.timedOutFunction = timedOutFunction
        self.timedOutArgs = timedOutArgs
        self.timedOutKwargs = timedOutKwargs

        if not msg:
            msg = self.getMsg()

        BaseException.__init__(self, msg)

        self.msg = msg


    def getMsg(self):
        '''
            getMsg - Generate a default message based on parameters to FunctionTimedOut exception'

            @return <str> - Message
        '''
        # Try to gather the function name, if available.
        # If it is not, default to an "unknown" string to allow default instantiation
        if self.timedOutFunction is not None:
            timedOutFuncName = self.timedOutFunction.__name__
        else:
            timedOutFuncName = 'Unknown Function'
        if self.timedOutAfter is not None:
            timedOutAfterStr = "%f" %(self.timedOutAfter, )
        else:
            timedOutAfterStr = "Unknown"

        return 'Function %s (args=%s) (kwargs=%s) timed out after %s seconds.\n' %(timedOutFuncName, repr(self.timedOutArgs), repr(self.timedOutKwargs), timedOutAfterStr)

    def retry(self, timeout=RETRY_SAME_TIMEOUT):
        '''
            retry - Retry the timed-out function with same arguments.

            @param timeout <float/RETRY_SAME_TIMEOUT/None> Default RETRY_SAME_TIMEOUT

                If RETRY_SAME_TIMEOUT : Will retry the function same args, same timeout
                If a float/int : Will retry the function same args with provided timeout
                If None : Will retry function same args no timeout

            @return - Returnval from function
        '''
        if timeout is None:
            return self.timedOutFunction(*(self.timedOutArgs), **self.timedOutKwargs)

        from .dafunc import func_timeout

        if timeout == RETRY_SAME_TIMEOUT:
            timeout = self.timedOutAfter

        return func_timeout(timeout, self.timedOutFunction, args=self.timedOutArgs, kwargs=self.timedOutKwargs)