import os

# CONVERT shell colors to the same curses palette
COLORS = {
    "wr": '\033[1;37;41m', # white on red
    "wo": '\033[1;37;43m', # white on orange
    "wm": '\033[1;37;45m', # white on magenta
    "wb": '\033[1;37;46m', # white on blue
    "bw": '\033[1;37;40m', # black on white
    "lblue": '\033[1;34m', # light blue
    "lred": '\033[1;31m', # light red
    "lgreen": '\033[1;32m', # light green
    "yellow": '\033[1;33m', # yellow
    "cyan": '\033[36m', # cyan
    "blue": '\033[34m', # blue
    "green": '\033[32m', # green
    "orange": '\033[33m', # orange
    "red": '\033[31m', # red
    "magenta": "\033[35m", # magenta
    "white": "\033[0m", # white
    None: "\033[0m", # end
}

def colorify(string, color):
    return "%s%s%s" %(COLORS[color], string, COLORS[None])

def clear_color(string):
    return re.sub("\033\\[[^m]+m", "", string)

def which(program):
    def is_exe(fpath):
        return os.path.isfile(fpath) and os.access(fpath, os.X_OK)

    fpath, fname = os.path.split(program)
    if fpath:
        if is_exe(program):
            return program
    else:
        for path in os.environ["PATH"].split(os.pathsep):
            path = path.strip('"')
            exe_file = os.path.join(path, program)
            if is_exe(exe_file):
                return exe_file
    return ""
