#!/usr/bin/env python
from pyaccuwage.parser import RecordBuilder
from pyaccuwage.pdfextract import PDFRecordFinder
import argparse
import sys
import os
import re

parser = argparse.ArgumentParser(description="Parse and convert contents of IRS files into pyaccuwage e-file classes.")
parser.add_argument("-i", "--input", nargs=1, required=True,  metavar="file", type=argparse.FileType('r'), help="Source PDF file, ie: p1220.pdf")
parser.add_argument("-f", "--full", help="Generate full python file, including related imports.", action="store_true")

args = parser.parse_args()

def generate_imports():
    return "\n".join([
        "from pyaccuwage import model as pyaccuwagemodel",
        "from pyaccuwage.fields import *",
        "",
        "",
        ])

if args.full:
    sys.stdout.write(generate_imports())

source_file = os.path.abspath(args.input[0].name)

doc = PDFRecordFinder(source_file)
records = doc.records()
builder = RecordBuilder()

for (name, fields) in records:
    name = re.sub(r'^[^a-zA-Z]*','', name.split(':')[-1])
    name = re.sub(r'[^\w]*', '', name)
    sys.stdout.write("\nclass %s(pyaccuwagemodel.Model):\n" % name)
    for field in builder.load(map(lambda x: x, fields[0:])):
        sys.stdout.write('\t' + field + '\n')