# -*- coding: utf-8 -*-
import os
from optparse import OptionParser

def main(input_file_path, schema, table):

    # create the output file in the same directory as the input file
    output_file_path = os.path.splitext(input_file_path)[0] + '_as_node' + '.csv'

    # you may have to change the encoding 
    with open(input_file_path, mode='r', encoding = 'utf-16le', newline='') as input_file, \
    open(output_file_path, mode='w', encoding = 'utf-16le', newline='') as output_file:
    
        line = input_file.readline()
        line_number = 0

        # read each line of the input file, add a $node_id column and write down the result on the output file
        while line:       
            if line_number == 0:
                newline = '\ufeff' + '{"type":"node","schema":"' + schema + '","table":"' + table + '","id":' + str(line_number) + '}\t' + line[1:]
            else:
                newline = '{"type":"node","schema":"' + schema + '","table":"' + table + '","id":' + str(line_number) + '}\t' + line
            output_file.write(newline)
            line_number += 1
            line = input_file.readline()
    
if __name__ == '__main__':
    
    parser = OptionParser()
    
    parser.add_option("-f", "--file", action="store", type="string", dest="input_file_name")
    parser.add_option("-s", "--schema", action="store", type="string", dest="schema")
    parser.add_option("-t", "--table", action="store", type="string", dest="table")
    
    (options, args) = parser.parse_args()

    # retrieve options if not provided by the user
    if (options.input_file_name == None):
        options.name = input('Please enter the full path to the csv file you will import as a node table:')
    if (options.schema == None):
        options.name = input('Please enter the SQL schema of the node table you will populate:')
    if (options.table == None):
        options.name = input('Please enter the SQL name of the node table you are populate:')
 
    main(options.input_file_name, options.schema, options.table)