#! /home/nikolaj/.pyenv/shims/python
"""
Usage:
    cent (-h|--help)
    cent (-i|-c) FILE

Options:
    -h --help   Print this help screen
    -i          Run the interpreter
    -c          Run the compiler
    FILE        The file to compile/interpret
"""
from docopt import docopt

from centvrion.lexer import Lexer
from centvrion.parser import Parser
from centvrion.ast_nodes import Program

def main():
    args = docopt(__doc__)
    file_path = args["FILE"]
    with open(file_path, "r", encoding="utf-8") as file_pointer:
        program_text = file_pointer.read() + "\n"

    lexer = Lexer().get_lexer()
    parser = Parser()

    tokens = lexer.lex(program_text)

    program = parser.parse(tokens)

    if isinstance(program, Program):
        if args["-i"]:
            program.eval()
        else:
            raise Exception("Compiler not implemented")
    else:
        raise Exception("Output not of type 'Program'", type(program))

if __name__ == "__main__":
    main()