#!/usr/bin/env python
# Copyright 2013 the V8 project authors. All rights reserved.
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# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
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#       with the distribution.
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import argparse
import json
import os
import re
import sys
import urllib

from common_includes import *
import create_release


class Preparation(Step):
  MESSAGE = "Preparation."

  def RunStep(self):
    # Fetch unfetched revisions.
    self.vc.Fetch()


class FetchCandidate(Step):
  MESSAGE = "Fetching V8 roll ref."

  def RunStep(self):
    # The roll ref points to the candidate to be rolled.
    self.Git("fetch origin +refs/heads/roll:refs/heads/roll")
    self["candidate"] = self.Git("show-ref -s refs/heads/roll").strip()


class LastReleaseBailout(Step):
  MESSAGE = "Checking last V8 release base."

  def RunStep(self):
    last_release = self.GetLatestReleaseBase()
    commits = self.GitLog(
        format="%H", git_hash="%s..%s" % (last_release, self["candidate"]))

    if not commits:
      print "Already pushed current candidate %s" % self["candidate"]
      return True


class CreateRelease(Step):
  MESSAGE = "Creating release if specified."

  def RunStep(self):
    print "Creating release for %s." % self["candidate"]

    args = [
      "--author", self._options.author,
      "--reviewer", self._options.reviewer,
      "--revision", self["candidate"],
      "--force",
    ]

    if self._options.work_dir:
      args.extend(["--work-dir", self._options.work_dir])

    if self._options.push:
      self._side_effect_handler.Call(
          create_release.CreateRelease().Run, args)


class AutoPush(ScriptsBase):
  def _PrepareOptions(self, parser):
    parser.add_argument("-p", "--push",
                        help="Create release. Dry run if unspecified.",
                        default=False, action="store_true")

  def _ProcessOptions(self, options):
    if not options.author or not options.reviewer:  # pragma: no cover
      print "You need to specify author and reviewer."
      return False
    options.requires_editor = False
    return True

  def _Config(self):
    return {
      "PERSISTFILE_BASENAME": "/tmp/v8-auto-push-tempfile",
    }

  def _Steps(self):
    return [
      Preparation,
      FetchCandidate,
      LastReleaseBailout,
      CreateRelease,
    ]


if __name__ == "__main__":  # pragma: no cover
  sys.exit(AutoPush().Run())