# -*- coding: utf-8 -*-

"""
spark.py
~~~~~~~~

A port of @holman's spark project for Python.
"""

import sys

ticks = u' ▁▂▃▄▅▆▇█'


def spark_string(ints, fit_min=False):
    """Returns a spark string from given iterable of ints.
    
    Keyword Arguments:
    fit_min: Matches the range of the sparkline to the input integers
             rather than the default of zero. Useful for large numbers with
             relatively small differences between the positions
    """
    min_range = min(ints) if fit_min else 0
    step_range = max(ints) - min_range
    step = (step_range / float(len(ticks) - 1)) or 1
    return u''.join(ticks[int(round((i - min_range) / step))] for i in ints)


def spark_print(ints, stream=None, fit_min=False):
    """Prints spark to given stream."""
    if stream is None:
        stream = sys.stdout
    stream.write(spark_string(ints, fit_min=fit_min).encode('utf-8'))

if __name__ == '__main__':
    if len(sys.argv) > 1:
        sparks = map(int, sys.argv[1:])
        spark_print(sparks)
        print
    else:
        print "spark\n"
        print "USAGE:"
        print "  spark.py [spaces separated values]\n"
        print "EXAMPLES:"
        print "  spark.py 1 5 22 13 53"
        spark_print([1, 5, 22, 13, 53])
        print
        print "  spark.py 0 30 55 80 33 150"
        spark_print([0, 30, 55, 80, 33, 150])
        print