#!/usr/bin/env python
#
# Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.

import os
import os.path
import shutil
import sys
import subprocess

import bot
import bot_utils

utils = bot_utils.GetUtils()

BUILD_OS = utils.GuessOS()
BUILD_ARCHITECTURE = utils.GuessArchitecture()

(bot_name, _) = bot.GetBotName()
CHANNEL = bot_utils.GetChannelFromName(bot_name)

def BuildArchitectures():
 if BUILD_OS == 'linux':
   return ['ia32', 'x64', 'arm', 'arm64']
 else:
   return ['ia32', 'x64']

def BuildSDK():
  with bot.BuildStep('Build SDK'):
    if BUILD_OS == 'linux':
      sysroot_env = dict(os.environ)
      sysroot_env['DART_USE_WHEEZY'] = '1'
      Run([sys.executable, './tools/generate_buildfiles.py'], env=sysroot_env)
    for arch in BuildArchitectures():
      Run([sys.executable, './tools/build.py', '--mode=release',
           '--arch=' + arch, 'create_sdk'])

def BuildDartdocAPIDocs(dirname):
  dart_sdk = os.path.join(bot_utils.DART_DIR,
                          utils.GetBuildRoot(BUILD_OS, 'release',
                                             BUILD_ARCHITECTURE),
                          'dart-sdk')
  dart_exe =  os.path.join(dart_sdk, 'bin', 'dart')
  dartdoc_dart = os.path.join(bot_utils.DART_DIR,
                              'third_party', 'pkg' , 'dartdoc' , 'bin' , 
                              'dartdoc.dart')
  footer_file = os.path.join(bot_utils.DART_DIR,
                              'tools', 'bots', 'dartdoc_footer.html')
  url = 'https://api.dartlang.org/stable'
  with bot.BuildStep('Build API docs by dartdoc'):
    bot_utils.run([dart_exe, dartdoc_dart,
                  '--sdk-docs','--output', dirname, '--footer' , footer_file,
                  '--rel-canonical-prefix=' + url])

def CreateUploadVersionFile():
  file_path = os.path.join(bot_utils.DART_DIR,
                           utils.GetBuildRoot(BUILD_OS, 'release',
                                              BUILD_ARCHITECTURE),
                           'VERSION')
  with open(file_path, 'w') as fd:
    fd.write(utils.GetVersionFileContent())
  DartArchiveUploadVersionFile(file_path)

def DartArchiveUploadVersionFile(version_file):
  namer = bot_utils.GCSNamer(CHANNEL, bot_utils.ReleaseType.RAW)
  revision = utils.GetArchiveVersion()
  for revision in [revision, 'latest']:
    destination = namer.version_filepath(revision)
    DartArchiveFile(version_file, destination, checksum_files=False)

def CreateUploadSDKZips():
  with bot.BuildStep('Create and upload sdk zips'):
    for arch in BuildArchitectures():
      sdk_path = os.path.join(bot_utils.DART_DIR,
                              utils.GetBuildRoot(BUILD_OS, 'release', arch),
                              'dart-sdk')
      sdk_zip = os.path.join(bot_utils.DART_DIR,
                             utils.GetBuildRoot(BUILD_OS, 'release', arch),
                             'dartsdk-%s-%s.zip' % (BUILD_OS, arch))
      FileDelete(sdk_zip)
      CreateZip(sdk_path, sdk_zip)
      DartArchiveUploadSDKs(BUILD_OS, arch, sdk_zip)

def DartArchiveUploadSDKs(system, arch, sdk_zip):
  namer = bot_utils.GCSNamer(CHANNEL, bot_utils.ReleaseType.RAW)
  git_number = utils.GetArchiveVersion()
  git_hash = 'hash/%s' % utils.GetGitRevision()
  for revision in [git_number, git_hash, 'latest']:
    path = namer.sdk_zipfilepath(revision, system, arch, 'release')
    DartArchiveFile(sdk_zip, path, checksum_files=True)

def DartArchiveUnstrippedBinaries():
  namer = bot_utils.GCSNamer(CHANNEL, bot_utils.ReleaseType.RAW)
  revision = utils.GetArchiveVersion()
  binary = namer.unstripped_filename(BUILD_OS)
  for arch in BuildArchitectures():
    binary = os.path.join(bot_utils.DART_DIR,
                          utils.GetBuildRoot(BUILD_OS, 'release', arch),
                          binary)
    gs_path = namer.unstripped_filepath(revision, BUILD_OS, arch)
    DartArchiveFile(binary, gs_path)

def CreateUploadSDK():
  BuildSDK()
  CreateUploadSDKZips()
  DartArchiveUnstrippedBinaries()

def CreateUploadAPIDocs():
  dartdoc_dir = os.path.join(bot_utils.DART_DIR,
                             utils.GetBuildRoot(BUILD_OS, 'release',
                                                BUILD_ARCHITECTURE),
                             'gen-dartdocs')
  dartdoc_zip = os.path.join(bot_utils.DART_DIR,
                             utils.GetBuildRoot(BUILD_OS, 'release',
                                                BUILD_ARCHITECTURE),
                             'dartdocs-api.zip')
  if CHANNEL == 'try':
    BuildDartdocAPIDocs(dartdoc_dir)
  else:
    UploadApiLatestFile()
    BuildDartdocAPIDocs(dartdoc_dir)
    UploadDartdocApiDocs(dartdoc_dir)
    CreateZip(dartdoc_dir, dartdoc_zip)
    DartArchiveUploadDartdocAPIDocs(dartdoc_zip)

def DartArchiveUploadDartdocAPIDocs(api_zip):
  namer = bot_utils.GCSNamer(CHANNEL, bot_utils.ReleaseType.RAW)
  revision = utils.GetArchiveVersion()
  for revision in [revision, 'latest']:
    destination = (namer.apidocs_directory(revision) + '/' +
        namer.dartdocs_zipfilename())
    DartArchiveFile(api_zip, destination, checksum_files=False)

def UploadDartdocApiDocs(dir_name):
  apidocs_namer = bot_utils.GCSNamerApiDocs(CHANNEL)
  revision = utils.GetArchiveVersion()
  dartdocs_destination_gcsdir = apidocs_namer.dartdocs_dirpath(revision)

  # Return early if the documents have already been uploaded.
  # This can happen if a build was forced, or a commit had no changes in the
  # dart repository (e.g. DEPS file update).
  if GsutilExists(dartdocs_destination_gcsdir):
    print ("Not uploading api docs, since %s is already present."
           % dartdocs_destination_gcsdir)
    return

  # Upload everything inside the built apidocs directory.
  gsutil = bot_utils.GSUtil()
  gsutil.upload(dir_name, dartdocs_destination_gcsdir, recursive=True,
                public=True, multithread=True)

def UploadApiLatestFile():
  apidocs_namer = bot_utils.GCSNamerApiDocs(CHANNEL)
  revision = utils.GetArchiveVersion()
  apidocs_destination_latestfile = apidocs_namer.docs_latestpath(revision)
  # Update latest.txt to contain the newest revision.
  with utils.TempDir('latest_file') as temp_dir:
    latest_file = os.path.join(temp_dir, 'latest.txt')
    with open(latest_file, 'w') as f:
      f.write('%s' % revision)
    DartArchiveFile(latest_file, apidocs_destination_latestfile)

def GsutilExists(gsu_path):
  # This is a little hackish, but it is basically a one off doing very
  # specialized check that we don't use elsewhere.
  gsutilTool = os.path.join(bot_utils.DART_DIR,
                            'third_party', 'gsutil', 'gsutil')
  (_, stderr, returncode) = bot_utils.run(
      [gsutilTool, 'ls', gsu_path],
      throw_on_error=False)
  # If the returncode is nonzero and we can find a specific error message,
  # we know there are no objects with a prefix of [gsu_path].
  missing = (returncode and 'CommandException: No such object' in stderr)
  # Either the returncode has to be zero or the object must be missing,
  # otherwise throw an exception.
  if not missing and returncode:
    raise Exception("Failed to determine whether %s exists" % gsu_path)
  return not missing


def CreateZip(directory, target_file):
  if 'win' in BUILD_OS:
    CreateZipWindows(directory, target_file)
  else:
    CreateZipPosix(directory, target_file)

def CreateZipPosix(directory, target_file):
  with utils.ChangedWorkingDirectory(os.path.dirname(directory)):
    command = ['zip', '-yrq9', target_file, os.path.basename(directory)]
    Run(command)

def CreateZipWindows(directory, target_file):
  with utils.ChangedWorkingDirectory(os.path.dirname(directory)):
    zip_win = os.path.join(bot_utils.DART_DIR, 'third_party', '7zip', '7za')
    command = [zip_win, 'a', '-tzip', target_file, os.path.basename(directory)]
    Run(command)

def FileDelete(f):
  if os.path.exists(f):
    os.remove(f)

def DartArchiveFile(local_path, remote_path, checksum_files=False):
  gsutil = bot_utils.GSUtil()
  gsutil.upload(local_path, remote_path, public=True)
  if checksum_files:
    # 'local_path' may have a different filename than 'remote_path'. So we need
    # to make sure the *.md5sum file contains the correct name.
    assert '/' in remote_path and not remote_path.endswith('/')

    mangled_filename = remote_path[remote_path.rfind('/') + 1:]
    local_md5sum = bot_utils.CreateMD5ChecksumFile(local_path,
                                                   mangled_filename)
    gsutil.upload(local_md5sum, remote_path + '.md5sum', public=True)
    local_sha256 = bot_utils.CreateSha256ChecksumFile(local_path,
                                                      mangled_filename)
    gsutil.upload(local_sha256, remote_path + '.sha256sum', public=True)

def Run(command, env=None):
  print "Running %s" % ' '.join(command)
  print "Environment %s" % env
  return bot.RunProcess(command, env=env)

if __name__ == '__main__':
  if len(sys.argv) > 1 and sys.argv[1] == 'api_docs':
    if BUILD_OS == 'linux':
      CreateUploadAPIDocs()
  else:
    # We always clobber the bot, to make sure releases are build from scratch
    force = CHANNEL != bot_utils.Channel.BLEEDING_EDGE
    bot.Clobber(force=force)

    CreateUploadSDK()
    if BUILD_OS == 'linux':
      CreateUploadVersionFile()