'''
Purpose: introduce decision making
'''

# determine chrysanthemum color given an input soil pH level
#       acidic soil produces pink chrysanthemums
#   non-acidic soil produces blue chrysanthemums

# acidity threshold

ACIDIC_THRESHOLD = 7.0     # samples less than threshold are acidic

# get soil pH level of interst
reply = input( 'Enter soil pH level: ' )

pH = float( reply )

print( )

# analyze and report effect on chrysanthemums
#   if acidic print 'pink';  otherwise print 'blue'

# Let's make our lives easier and define the constants for lowest and highest pH levels.

LOWEST_PH_LEVEL = 0.0 #
HIGHEST_PH_LEVEL = 14.0

# We cannot accept pH levels lower than 0.0 and higher than 14.0
# If it's less than 7.0 we know that our flowers will be pink.
# If it's greater (any other case) we know our flowers will be blue.

if ( pH < LOWEST_PH_LEVEL) : #
    print( "Illegal pH level: ", pH )
elif ( pH > HIGHEST_PH_LEVEL ) :
    print("Illegal pH level: ", pH)
elif ( pH < ACIDIC_THRESHOLD ) :
    print ( "Pink" )
    #is acidic
else :
    print( "Blue" )

# It's useful to leave the biggest condition in the else statement.

# all done