import re # libary to search and replace strings in the postscript file
from dictionary import font_index

# function with two arguments
def friction_label(previous_module, module):
    #text = input("Enter text:") # create input field for text input
    text = "enter text here"
    submit="0"

    font = font_index[module[1]] # use font_index from dictionary to translate the fontname

    fontsize = module[2] # sensor3
    rotation = module[3] # sensor2
    linewidth = module[4]
    x = module[5] # sensor4
    y = module[6] # sensor 4, same the exact same value
    graytone1 = module[7] # sensor5
    graytone2 = module[8] # sensor5, opposite range
    submit = module[9] # sensor6 # in this case it opens one ps, replaces some lines and writes to a new ps


    script = """

newpath

/"""+font+"""
% fontname

"""+fontsize+""" selectfont
% fontsize in points, establishes the font as the current one

"""+x+""" """+y+""" moveto
% x and y coordinates in px (origin is the lower-left corner of the page)

"""+rotation+""" rotate
% degree of rotation, counter clockwise around the given position

("""+text+""") true charpath
% normally text works with "show", but to use the characters in the string as a path that can be stroked and filled use "true charpath"

gsave
% save the current path to apply stroke first and then go back to the saved path to apply fill (Both drawing commands destroy the current path)

"""+linewidth+""" setlinewidth
% linewidth for the outline of the text

"""+graytone2+""" setgray
% graytone for the outline (0 = black, 1 = white)

stroke
% stroke (outline) the text in parentheses

grestore
% restore the original path to apply fill

"""+graytone1+""" setgray
% graytone for the filling (0 = black, 1 = white)

fill
% fill the text in parentheses

showpage
% print all on a page
"""

    if submit == "1": # sensor6
        print("starting to write the ps-file")
        if previous_module == "":
            #input file
            fileInput = open("empty.ps", "rt") # rt = read text mode
            #output file to write the result to
            fileOutput = open("friction_label.ps", "wt") # wt = write text mode

        else:
            #input file
            fileInput = open(previous_module + ".ps", "rt") # rt = read text mode
            #output file to write the result to
            fileOutput = open("friction_label.ps", "wt") # wt = write text mode

        # read the input file, search for a patterns, replace it with new patterns (that take the values from the input sensor)
        # uses regular expressions library (re)
        content = fileInput.read()
        content = re.sub(r"showpage\n% print all on a page", (script), content)

        # write the new text to the output file
        fileOutput.write(content)
        #close input and output files
        fileInput.close()
        fileOutput.close()