#!/usr/bin/env python
# -*- coding:utf-8 -*-

import sys
import re

VAR_RE = re.compile(r'\${([^}]*)}(?:\.(\w+))?')

opts = {'sprite_name': ''}

def main(csvfile, cssfile):
    coords = {}
    for row in open(csvfile):
        try:
            fn, x, y = row.rstrip().split(',', 3)
        except ValueError:
            continue
            
        coords[fn] = (int(x), int(y))
    
    for row in open(cssfile):
        row = VAR_RE.sub(lambda mo: coord_repl(mo, coords), row)
        sys.stdout.write(row)
    
def coord_repl(mo, coords):
    try:
        fn, directive = mo.groups()
        coords = coords[fn]
    except KeyError:
        # does not convert when fn is not found
        return mo.group(0)
    
    if   directive == 'x':
        return '-%dpx' % coords[0]
    elif directive == 'y':
        return '-%dpx' % coords[1]
    else:
        return 'background: url(%s) no-repeat -%dpx -%dpx;' % (
            opts['sprite_name'], coords[0], coords[1]
        )

def get_options():
    import optparse
    
    parser = optparse.OptionParser(
        usage='%prog [options] [CSV COORDS FILE] [CSS FILE]'
    )
    parser.add_option(
        '-s', '--sprite-name',
        action='store', type='string',
        dest='sprite_name',
        default='',
        help="css sprite file path"
    )
    
    options, args = parser.parse_args()
    
    if len(args) != 2:
        parser.print_help()
        parser.exit()
    
    opts['sprite_name'] = options.sprite_name
    return args

if __name__ == '__main__':
    main(*get_options())