"""Tags a file with NEXT_SCI in extra feature column. Reads and writes vert files.
"""
import json

#from pip._vendor.pyparsing import line


VFILE = 'test_next.vert'

def split_line(line):
    """Split a line into five parts, word, tag, lempos, ti, sci"""
    # TODO: Speak to Diana about the spaces in the vert file - do they mean
    # anything?
    line = line.strip().split()
    if len(line) == 1:
        word = line[0]
        pos, lempos, tag = None, None, None
    elif len(line) == 3:
        word, pos, lempos = line
        tag = None
    elif len(line) == 4:
        word, pos, lempos, tag = line
    return [word, pos, lempos, tag]

def tag_next_sci(lines):
    """Loops through lines of original document to add to new file (tagged)
    """
    taggedlines = []
    for line in lines:
        taggedlines.append(tagline_next_sci(line, taggedlines))
    return taggedlines


def tagline_next_sci(line, taggedlines):
    """Assigns an indicator tag to a line
    """
    #<> are structural and do not need to be considered for feature tags so can be committed directly
    if line.startswith('<'):
        return line
    #look back at previous line to see if SCI, if so tag current line
    previous_line  = taggedlines[-1]
    previous_line = split_line(previous_line)
    line = split_line(line)
    #look at last column. if SCI, print line, go to next line and add tag in final column ("tttNXT_SCIn")
    if previous_line[-1] == "SCI":
        if len(line) == 3:
            print(line + "tttSCI_MODn")
            return(line + "tttSCI_MODn")
        if len(line) == 4:
            print(line + "ttSCI_MODn")
            return(line + "ttSCI_MODn")
    return line

def read_vfile(fname):
    """Reads a vert file
    """
    with open(fname, 'r') as vfile:
        lines = vfile.readlines()
        return lines

def write_vfile(fname, taggedlines):
    """Writes a vert file
    """
    # write to file
    with open(fname, 'w') as outfile:
        outfile.writelines(taggedlines)

def tag_vert_sci_next(fname, fname_out):
    """Creates a new file with tags
    """
    # read vertical file
    lines = read_vfile(fname)
    # tag file
    taggedlines = tag_next_sci(lines)
    # call write file
    write_vfile(fname_out, taggedlines)

def main(fname, fname_out):
    #call sci_next tagging
    tag_vert_sci_next('test_next.vert', fname_out)

if __name__ == "__main__":
    main('test_next.vert', 'zenodo_tagged_SCI_MOD.vert')

Traceback (most recent call last):
  File "/home/sandra/git/trophic/tagging/tagging_NEXT.py", line 123, in <module>
    main('test_next.vert', 'zenodo_tagged_SCI_MOD.vert')
  File "/home/sandra/git/trophic/tagging/tagging_NEXT.py", line 120, in main
    tag_vert_sci_next('test_next.vert', fname_out)
  File "/home/sandra/git/trophic/tagging/tagging_NEXT.py", line 78, in tag_vert_sci_next
    taggedlines = tag_next_sci(lines)
  File "/home/sandra/git/trophic/tagging/tagging_NEXT.py", line 31, in tag_next_sci
    taggedlines.append(tagline_next_sci(line, taggedlines))
  File "/home/sandra/git/trophic/tagging/tagging_NEXT.py", line 43, in tagline_next_sci
    previous_line = split_line(previous_line)
  File "/home/sandra/git/trophic/tagging/tagging_NEXT.py", line 14, in split_line
    line = line.strip().split()
AttributeError: 'list' object has no attribute 'strip'