import os
import sys

if os.path.exists('C:\\apps\\Vim\\vim74\\gvim.exe'):
    vimdir = 'C:\\apps\\Vim\\vim74'
elif os.path.exists('C:\\apps\\Vim\\vim73\\gvim.exe'):
    vimdir = 'C:\\apps\\Vim\\vim73'
else:
    raise "Could not find Vim directory, update script"

config = {
    # path to directory containing vim.exe and gvim.exe
    'vimdir': vimdir,
    # list of (path, name) tuples defining gvim contexts
    'servers': [],
    # default server name to use if no server paths match
    'default_server': 'GVIM',
    }

def read_config_file(config, path):
    if os.path.exists(path):
        fh = open(path, 'r')
        script = fh.read()
        fh.close()
        try:
            exec(script, config)
        except:
            sys.stderr.write('Configuration file error in "%s":\n' % path)
            traceback.print_exception(sys.exc_info()[0], sys.exc_info()[1],
                    None)
            tb = traceback.extract_tb(sys.exc_info()[2])
            for ent in tb[1:]:
                lineno, fn = ent[1:3]
                sys.stderr.write('  File "%s", line %d, in %s\n'
                        % (path, lineno, fn))

def path_contains_file(path, fname):
    path = path.replace('\\', '/')
    fname = fname.replace('\\', '/')
    if path.endswith('/'):
        path = path[:-1]
    return fname.startswith(path + '/')

def get_server_name(config, fname):
    for path, name in config['servers']:
        path = path.replace('\\', '/')
        if path.endswith('/*'):
            path = path[:-2]
            try:
                for dirent in os.listdir(path):
                    query_path = os.path.join(path, dirent)
                    if os.path.isdir(query_path) and path_contains_file(query_path, fname):
                        return name.replace('*', dirent)
            except:
                pass
        else:
            if path_contains_file(path, fname):
                return name.replace('*', os.path.basename(path))
    return config['default_server']

def main(argv):
    read_config_file(config, os.path.expanduser('~/.gvim-wrapper'))
    fname = ' '.join(argv[1:]) if len(argv) >= 2 else ''
    servername = get_server_name(config, fname if fname != '' else os.getcwd() + '/dum')
    cmd = ['gvim', '--servername', '"%s"' % servername]
    if fname != '':
        cmd += ['--remote-tab-silent', '"%s"' % fname]
    os.execv(config['vimdir'] + '\\gvim.exe', cmd)

if __name__ == '__main__':
    sys.exit(main(sys.argv))