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__author__ = 'long'

import sys

import os

from antlr4 import *

from antlr4.InputStream import InputStream

from Python3Lexer import Python3Lexer

from Python3Parser import Python3Parser

from JSEmitter import JSEmitter

from filter import spaceFilter

if __name__ == '__main__':

file_name = 'result'

lexer_name = 'lexer.py'

# 由于词法分析对空行处理有bug, 故先预处理, 将空行消除

if len(sys.argv) > 1:

file_name = sys.argv[1].split('.')[0]

spaceFilter(sys.argv[1], lexer_name)

else:

with open('lexer_tmp.py', 'w') as fi:

fi.write(sys.stdin.read())

spaceFilter('lexer_tmp.py', lexer_name)

os.remove('lexer_tmp.py')

input_stream = FileStream(lexer_name, encoding='utf-8')

os.remove(lexer_name)

lexer = Python3Lexer(input_stream)

token_stream = CommonTokenStream(lexer)

parser = Python3Parser(token_stream)

tree = parser.parse()

lisp_tree_str = tree.toStringTree(recog=parser)

# listener

print("Start Walking...")

listener = JSEmitter()

walker = ParseTreeWalker()

walker.walk(listener, tree)

listener.clearAll()

walker.walk(listener, tree)

if len(listener.errorLog) > 0:

for e in listener.errorLog:

print(e)

else:

with open('tmp.js', 'w') as fi:

fi.write(listener.getJS(tree))

spaceFilter('tmp.js', file_name+'.js')

os.remove('tmp.js')