import sys
from os import path

from csv_input import read_input
from generate import renderer

from byte_position import parse

type_dict = {
    1: 'uint8_t',
    2: 'uint16_t',
    4: 'uint16_le_be',
    8: 'uint32_le_be',
}

def _camelcase(name):
    want_upper = True
    for c in name:
        if c == '_':
            want_upper = True
        else:
            yield c.upper() if want_upper else c
            want_upper = False

def camelcase(name):
    return "".join(_camelcase(name))

def render_fields(input_name, fields):
    yield "package filesystem.iso9660;"
    yield f"public class {camelcase(input_name)} {{"
    for field in fields:
        yield f"public static final int {field.name.upper()} = {field.start - 1};"
    yield "}"

if __name__ == "__main__":
    input_file = sys.argv[1]
    input_name0, _ = path.splitext(input_file)
    _, input_name = path.split(input_name0)
    rows = read_input(input_file)
    fields = list(parse(rows))
    render, out = renderer()
    render(render_fields(input_name, fields))
    sys.stdout.write(out.getvalue())