import re
import urllib
import simplejson
from allmydata.scripts.common import get_alias, DEFAULT_ALIAS, escape_path
from allmydata.scripts.common_http import do_http

def mv(nodeurl, aliases, from_file, to_file, stdout, stderr):
    if nodeurl[-1] != "/":
        nodeurl += "/"
    rootcap, path = get_alias(aliases, from_file, DEFAULT_ALIAS)
    from_url = nodeurl + "uri/%s" % urllib.quote(rootcap)
    if path:
        from_url += "/" + escape_path(path)
    # figure out the source cap
    data = urllib.urlopen(from_url + "?t=json").read()
    nodetype, attrs = simplejson.loads(data)
    cap = attrs.get("rw_uri") or attrs["ro_uri"]
    # simplejson always returns unicode, but we know that it's really just an
    # ASCII file-cap.
    cap = str(cap)

    # now get the target
    rootcap, path = get_alias(aliases, to_file, DEFAULT_ALIAS)
    to_url = nodeurl + "uri/%s" % urllib.quote(rootcap)
    if path:
        to_url += "/" + escape_path(path)
    if path.endswith("/"):
        # "mv foo.txt bar/" == "mv foo.txt bar/foo.txt"
        pass # TODO
    to_url += "?t=uri"

    resp = do_http("PUT", to_url, cap)
    status = resp.status
    if not re.search(r'^2\d\d$', str(status)):
        print >>stderr, "error, got %s %s" % (resp.status, resp.reason)
        print >>stderr, resp.read()

    # now remove the original
    resp = do_http("DELETE", from_url)
    if not re.search(r'^2\d\d$', str(status)):
        print >>stderr, "error, got %s %s" % (resp.status, resp.reason)
        print >>stderr, resp.read()

    print >>stdout, "OK"
    return