#!/usr/bin/env python

import sys
import time
from decimal import Decimal

import empty
import base

def f_out(f, s, tail='\n'):
	f.write(s + tail)
	f.flush()

def out(s, tail='\n'):
	f_out(sys.stdout, s, tail)

def err(s, tail='\n'):
	f_out(sys.stderr, s, tail)

def out_exit(s, code=0):
	out(s)
	sys.exit(code)

def err_exit(s, code=1):
	err(s)
	sys.exit(code)

def help_exit(help, code=1):
	s = ' '.join( [ 'Usage:', sys.argv[0], help ] )
	err_exit(s)

def out_lst(lst, pre=''):
	out( base.to_str( lst, pre ) )


def msg_start(msg, show=True):
	if show:
		out( msg + ' ... ', '' )
	def end():
		if show:
			out( 'ok' )
	return end

start_save = lambda path, show=True: msg_start( 'save ' + path, show )
start_load = lambda path, show=True: msg_start( 'load ' + path, show )


quantize= lambda v, exp: Decimal( v ).quantize( Decimal( exp ) )
# Deciaml( '123.456789' ).quantize( Decimal( '0.001' ) )
# --> 123.456


def laptime_new(s=''):
	lst = []

	def get(s=''):
		inf = empty.new( s=s, tm_sec=time.time(), sec=0, dsec=0 )
		if lst:
			inf.sec = inf.tm_sec - lst[ 0 ].tm_sec
			inf.dsec = inf.sec - lst[ -1 ].sec
		return inf

	get_sec = lambda : get().sec

	def rec(s='', do_show=False):
		inf = get( s )
		lst.append( inf )
		if do_show:
			show( inf )

	def show(inf=None):
		if inf:
			i = lst.index( inf ) if inf in lst else -1
			exp = '0.001'
			sec = quantize( inf.sec, exp )
			dsec = quantize( inf.dsec, exp )
			s = '{} {} {} {}'.format( i, inf.s, sec, dsec )
			out( s )
		else:
			out( '----' )
			for inf in lst:
				show( inf )

	rec( s )

	return empty.new( locals() )

# EOF