# Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""The label of benchamrks."""

from __future__ import print_function

import hashlib
import os

from image_checksummer import ImageChecksummer
from cros_utils.file_utils import FileUtils
from cros_utils import misc


class Label(object):
  """The label class."""

  def __init__(self,
               name,
               chromeos_image,
               chromeos_root,
               board,
               remote,
               image_args,
               cache_dir,
               cache_only,
               log_level,
               compiler,
               chrome_src=None):

    self.image_type = self._GetImageType(chromeos_image)

    # Expand ~
    chromeos_root = os.path.expanduser(chromeos_root)
    if self.image_type == 'local':
      chromeos_image = os.path.expanduser(chromeos_image)

    self.name = name
    self.chromeos_image = chromeos_image
    self.board = board
    self.remote = remote
    self.image_args = image_args
    self.cache_dir = cache_dir
    self.cache_only = cache_only
    self.log_level = log_level
    self.chrome_version = ''
    self.compiler = compiler

    if not chromeos_root:
      if self.image_type == 'local':
        chromeos_root = FileUtils().ChromeOSRootFromImage(chromeos_image)
      if not chromeos_root:
        raise Exception("No ChromeOS root given for label '%s' and could not "
                        "determine one from image path: '%s'." %
                        (name, chromeos_image))
    else:
      chromeos_root = FileUtils().CanonicalizeChromeOSRoot(chromeos_root)
      if not chromeos_root:
        raise Exception("Invalid ChromeOS root given for label '%s': '%s'." %
                        (name, chromeos_root))

    self.chromeos_root = chromeos_root
    if not chrome_src:
      self.chrome_src = os.path.join(
          self.chromeos_root, '.cache/distfiles/target/chrome-src-internal')
      if not os.path.exists(self.chrome_src):
        self.chrome_src = os.path.join(self.chromeos_root,
                                       '.cache/distfiles/target/chrome-src')
    else:
      chromeos_src = misc.CanonicalizePath(chrome_src)
      if not chromeos_src:
        raise Exception("Invalid Chrome src given for label '%s': '%s'." %
                        (name, chrome_src))
      self.chrome_src = chromeos_src

    self._SetupChecksum()

  def _SetupChecksum(self):
    """Compute label checksum only once."""

    self.checksum = None
    if self.image_type == 'local':
      self.checksum = ImageChecksummer().Checksum(self, self.log_level)
    elif self.image_type == 'trybot':
      self.checksum = hashlib.md5(self.chromeos_image).hexdigest()

  def _GetImageType(self, chromeos_image):
    image_type = None
    if chromeos_image.find('xbuddy://') < 0:
      image_type = 'local'
    elif chromeos_image.find('trybot') >= 0:
      image_type = 'trybot'
    else:
      image_type = 'official'
    return image_type

  def __hash__(self):
    """Label objects are used in a map, so provide "hash" and "equal"."""

    return hash(self.name)

  def __eq__(self, other):
    """Label objects are used in a map, so provide "hash" and "equal"."""

    return isinstance(other, Label) and other.name == self.name

  def __str__(self):
    """For better debugging."""

    return 'label[name="{}"]'.format(self.name)


class MockLabel(object):
  """The mock label class."""

  def __init__(self,
               name,
               chromeos_image,
               chromeos_root,
               board,
               remote,
               image_args,
               cache_dir,
               cache_only,
               log_level,
               compiler,
               chrome_src=None):
    self.name = name
    self.chromeos_image = chromeos_image
    self.board = board
    self.remote = remote
    self.cache_dir = cache_dir
    self.cache_only = cache_only
    if not chromeos_root:
      self.chromeos_root = '/tmp/chromeos_root'
    else:
      self.chromeos_root = chromeos_root
    self.image_args = image_args
    self.chrome_src = chrome_src
    self.image_type = self._GetImageType(chromeos_image)
    self.checksum = ''
    self.log_level = log_level
    self.compiler = compiler
    self.chrome_version = 'Fake Chrome Version 50'

  def _GetImageType(self, chromeos_image):
    image_type = None
    if chromeos_image.find('xbuddy://') < 0:
      image_type = 'local'
    elif chromeos_image.find('trybot') >= 0:
      image_type = 'trybot'
    else:
      image_type = 'official'
    return image_type