#!/usr/bin/env python
"""
Simple example of a test generator which just produces data on some
mathematical functions, keyed off of the current time.
"""
from __future__ import print_function
from lnt.testing import Machine, Run, TestSamples, Report
import math
import random
import sys
import time


def main():
    from optparse import OptionParser
    parser = OptionParser("usage: %prog [options] [output]")
    opts, args = parser.parse_args()

    if len(args) == 0:
        output = '-'
    elif len(args) == 1:
        output = args[0]
    else:
        parser.error("invalid number of arguments")

    if output == '-':
        output = sys.stdout
    else:
        output = open(output, 'w')

    offset = math.pi/5
    delay = 120.

    machine = Machine('Mr. Sin Wave', info={'delay': delay})

    start = time.time()

    run = Run(start, start, info={'t': start,
                                  'tag': 'simple',
                                  'run_order': 1})
    tests = [TestSamples('simple.%s' % name,
                         [fn(start*2*math.pi / delay + j * offset)],
                         info={'offset': j})
             for j in range(5)
             for name, fn in (('sin', math.sin),
                              ('cos', math.cos),
                              ('random', lambda x: random.random()))]

    report = Report(machine, run, tests)

    print(report.render(), file=output)

    if output is not sys.stderr:
        output.close()


if __name__ == '__main__':
    main()