# Copyright 2010-2011 Fog Creek Software

# Copyright 2010-2011 Unity Technologies

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

import urllib2

from mercurial import util

from mercurial.i18n import _

import lfutil

import basestore

class remotestore(basestore.basestore):

    def __init__(self, ui, repo, url):

        super(remotestore, self).__init__(ui, repo, url)

    def put(self, source, hash):

        if self._verify(hash):

            return

        if self.sendfile(source, hash):

            raise util.Abort(

                _('remotestore: could not put %s to remote store %s')

                % (source, self.url))

        self.ui.debug(

            _('remotestore: put %s to remote store %s') % (source, self.url))

    def exists(self, hash):

        return self._verify(hash)

    def sendfile(self, filename, hash):

        self.ui.debug('remotestore: sendfile(%s, %s)\n' % (filename, hash))

        fd = None

        try:

            try:

                fd = lfutil.httpsendfile(self.ui, filename)

            except IOError, e:

                raise util.Abort(

                    _('remotestore: could not open file %s: %s')

                    % (filename, str(e)))

            return self._put(hash, fd)

        finally:

            if fd:

                fd.close()

    def _getfile(self, tmpfile, filename, hash):

        # quit if the largefile isn't there

        stat = self._stat(hash)

        if stat:

            raise util.Abort(_('remotestore: largefile %s is %s') %

                             (hash, stat == 1 and 'invalid' or 'missing'))

        try:

            length, infile = self._get(hash)

        except urllib2.HTTPError, e:

            # 401s get converted to util.Aborts; everything else is fine being

            # turned into a StoreError

            raise basestore.StoreError(filename, hash, self.url, str(e))

        except urllib2.URLError, e:

            # This usually indicates a connection problem, so don't

            # keep trying with the other files... they will probably

            # all fail too.

            raise util.Abort('%s: %s' % (self.url, str(e.reason)))

        except IOError, e:

            raise basestore.StoreError(filename, hash, self.url, str(e))

        # Mercurial does not close its SSH connections after writing a stream

        if length is not None:

            infile = lfutil.limitreader(infile, length)

        return lfutil.copyandhash(lfutil.blockstream(infile), tmpfile)

    def _verify(self, hash):

        return not self._stat(hash)

    def _verifyfile(self, cctx, cset, contents, standin, verified):

        filename = lfutil.splitstandin(standin)

        if not filename:

            return False

        fctx = cctx[standin]

        key = (filename, fctx.filenode())

        if key in verified:

            return False

        verified.add(key)

        stat = self._stat(hash)

        if not stat:

            return False

        elif stat == 1:

            self.ui.warn(

                _('changeset %s: %s: contents differ\n')

                % (cset, filename))

            return True # failed

        elif stat == 2:

            self.ui.warn(

                _('changeset %s: %s missing\n')

                % (cset, filename))

            return True # failed

        else:

            raise util.Abort(_('check failed, unexpected response'

                               'statlfile: %d') % stat)