###############################################################################
#
# Copyright (c) 2011 Ruslan Spivak
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
###############################################################################

__author__ = 'Ruslan Spivak <ruslan.spivak@gmail.com>'

import sys
import optparse
import textwrap
import os

from slimit import mangler
from slimit.parser import Parser
from slimit.visitors.minvisitor import ECMAMinifier


def minify(text, mangle=False, mangle_toplevel=False):
    parser = Parser()
    tree = parser.parse(text)
    if mangle:
        mangler.mangle(tree, toplevel=mangle_toplevel)
    minified = ECMAMinifier().visit(tree)
    return minified


def main(argv=None, inp=sys.stdin, out=sys.stdout):
    usage = textwrap.dedent("""\
    %prog [options] [input file]

    If no input file is provided STDIN is used by default.
    Minified JavaScript code is printed to STDOUT.
    """)
    parser = optparse.OptionParser(usage=usage)
    parser.add_option('-m', '--mangle', action='store_true',
                      dest='mangle', default=False, help='mangle names')
    parser.add_option('-t', '--mangle-toplevel', action='store_true',
                      dest='mangle_toplevel', default=False,
                      help='mangle top level scope (defaults to False)')

    if argv is None:
        argv = sys.argv[1:]
    options, args = parser.parse_args(argv)

    if len(args) == 1:
        text = open(args[0]).read()
    else:
        text = inp.read()

    minified = minify(
        text, mangle=options.mangle, mangle_toplevel=options.mangle_toplevel)
    out.write(minified)
