#!/usr/bin/python
#
# Copyright Google Inc. 2014

import datetime
import optparse
import os
import sys
import time

from utils import constants
from utils import command_executer

WEEKDAYS = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
DATA_ROOT_DIR = os.path.join(constants.CROSTC_WORKSPACE, 'weekly_test_data')
EXPERIMENT_FILE = os.path.join(DATA_ROOT_DIR, 'weekly_report')
MAIL_PROGRAM = '~/var/bin/mail-sheriff'


def Generate_Vanilla_Report_File(vanilla_image_paths, board, remote,
                                 chromeos_root, cmd_executer):

  experiment_header = """
name: weekly_vanilla_report
cache_only: True
same_specs: False
board: %s
remote: %s
""" % (board, remote)

  experiment_tests = """
benchmark: all_toolchain_perf {
  suite: telemetry_Crosperf
  iterations: 3
}
"""

  filename = '%s_%s_vanilla.exp' % (EXPERIMENT_FILE, board)
  if os.path.exists(filename):
    cmd = 'rm %s' % filename
    cmd_executer.RunCommand(cmd)

  with open(filename, 'w') as f:
    print >> f, experiment_header
    print >> f, experiment_tests

    # Add each vanilla image
    for test_path in vanilla_image_paths:
      pieces = test_path.split('/')
      test_name = pieces[-1]
      test_image = """
%s {
  chromeos_root: %s
  chromeos_image: %s
}
""" % (test_name, chromeos_root, os.path.join(test_path,
                                              'chromiumos_test_image.bin'))
      print >> f, test_image

  return filename


def Generate_Test_File(test_image_paths, vanilla_image_path, board, remote,
                       chromeos_root, cmd_executer):

  experiment_header = """
name: weekly_report
cache_only: True
same_specs: False
board: %s
remote: %s
""" % (board, remote)

  experiment_tests = """
benchmark: all_toolchain_perf {
  suite: telemetry_Crosperf
  iterations: 3
}
"""

  filename = '%s_%s.exp' % (EXPERIMENT_FILE, board)
  if os.path.exists(filename):
    cmd = 'rm %s' % filename
    cmd_executer.RunCommand(cmd)

  with open(filename, 'w') as f:
    print >> f, experiment_header
    print >> f, experiment_tests

    # Add vanilla image (first)
    vanilla_image = """
%s {
  chromeos_root: %s
  chromeos_image: %s
}
""" % (vanilla_image_path.split('/')[-1], chromeos_root,
       os.path.join(vanilla_image_path, 'chromiumos_test_image.bin'))

    print >> f, vanilla_image

    # Add each test image
    for test_path in test_image_paths:
      pieces = test_path.split('/')
      test_name = pieces[-1]
      test_image = """
%s {
  chromeos_root: %s
  chromeos_image: %s
}
""" % (test_name, chromeos_root, os.path.join(test_path,
                                              'chromiumos_test_image.bin'))
      print >> f, test_image

  return filename


def Main(argv):

  parser = optparse.OptionParser()
  parser.add_option('-b', '--board', dest='board', help='Target board.')
  parser.add_option('-r', '--remote', dest='remote', help='Target device.')
  parser.add_option('-v',
                    '--vanilla_only',
                    dest='vanilla_only',
                    action='store_true',
                    default=False,
                    help='Generate a report comparing only the vanilla images.')

  options = parser.parse_args(argv[1:])[0]

  if not options.board:
    print 'Must specify a board.'
    return 1

  if not options.remote:
    print 'Must specify at least one remote.'
    return 1

  cmd_executer = command_executer.GetCommandExecuter(log_level='average')

  # Find starting index, for cycling through days of week, generating
  # reports starting 6 days ago from today. Generate list of indices for
  # order in which to look at weekdays for report:
  todays_index = datetime.datetime.today().isoweekday()
  indices = []
  start = todays_index + 1
  end = start + 7
  for i in range(start, end):
    indices.append(i % 7)
  # E.g. if today is Sunday, then start report with last Monday, so
  # indices = [1, 2, 3, 4, 5, 6, 0].

  # Find all the test image tar files, untar them and add them to
  # the list. Also find and untar vanilla image tar files, and keep
  # track of the first vanilla image.
  report_image_paths = []
  vanilla_image_paths = []
  first_vanilla_image = None
  for i in indices:
    day = WEEKDAYS[i]
    data_path = os.path.join(DATA_ROOT_DIR, options.board, day)
    if os.path.exists(data_path):
      # First, untar the test image.
      tar_file_name = '%s_test_image.tar' % day
      tar_file_path = os.path.join(data_path, tar_file_name)
      image_dir = '%s_test_image' % day
      image_path = os.path.join(data_path, image_dir)
      if os.path.exists(tar_file_path):
        if not os.path.exists(image_path):
          os.makedirs(image_path)
        cmd = ('cd %s; tar -xvf %s -C %s --strip-components 1' %
               (data_path, tar_file_path, image_path))
        ret = cmd_executer.RunCommand(cmd)
        if not ret:
          report_image_paths.append(image_path)
      # Next, untar the vanilla image.
      vanilla_file = '%s_vanilla_image.tar' % day
      v_file_path = os.path.join(data_path, vanilla_file)
      image_dir = '%s_vanilla_image' % day
      image_path = os.path.join(data_path, image_dir)
      if os.path.exists(v_file_path):
        if not os.path.exists(image_path):
          os.makedirs(image_path)
        cmd = ('cd %s; tar -xvf %s -C %s --strip-components 1' %
               (data_path, v_file_path, image_path))
        ret = cmd_executer.RunCommand(cmd)
        if not ret:
          vanilla_image_paths.append(image_path)
        if not first_vanilla_image:
          first_vanilla_image = image_path

  # Find a chroot we can use.  Look for a directory containing both
  # an experiment file and a chromeos directory (the experiment file will
  # only be created if both images built successfully, i.e. the chroot is
  # good).
  chromeos_root = None
  timestamp = datetime.datetime.strftime(datetime.datetime.now(),
                                         '%Y-%m-%d_%H:%M:%S')
  results_dir = os.path.join(
      os.path.expanduser('~/nightly_test_reports'), '%s.%s' % (
          timestamp, options.board), 'weekly_tests')

  for day in WEEKDAYS:
    startdir = os.path.join(constants.CROSTC_WORKSPACE, day)
    num_dirs = os.listdir(startdir)
    for d in num_dirs:
      exp_file = os.path.join(startdir, d, 'toolchain_experiment.txt')
      chroot = os.path.join(startdir, d, 'chromeos')
      if os.path.exists(chroot) and os.path.exists(exp_file):
        chromeos_root = chroot
      if chromeos_root:
        break
    if chromeos_root:
      break

  if not chromeos_root:
    print 'Unable to locate a usable chroot. Exiting without report.'
    return 1

  # Create the Crosperf experiment file for generating the weekly report.
  if not options.vanilla_only:
    filename = Generate_Test_File(report_image_paths, first_vanilla_image,
                                  options.board, options.remote, chromeos_root,
                                  cmd_executer)
  else:
    filename = Generate_Vanilla_Report_File(vanilla_image_paths, options.board,
                                            options.remote, chromeos_root,
                                            cmd_executer)

  # Run Crosperf on the file to generate the weekly report.
  cmd = ('%s/toolchain-utils/crosperf/crosperf '
         '%s --no_email=True --results_dir=%s' %
         (constants.CROSTC_WORKSPACE, filename, results_dir))
  retval = cmd_executer.RunCommand(cmd)
  if retval == 0:
    # Send the email, if the crosperf command worked.
    filename = os.path.join(results_dir, 'msg_body.html')
    if (os.path.exists(filename) and
        os.path.exists(os.path.expanduser(MAIL_PROGRAM))):
      vanilla_string = ' '
      if options.vanilla_only:
        vanilla_string = ' Vanilla '
      command = ('cat %s | %s -s "Weekly%sReport results, %s" -team -html' %
                 (filename, MAIL_PROGRAM, vanilla_string, options.board))
    retval = cmd_executer.RunCommand(command)

  return retval


if __name__ == '__main__':
  retval = Main(sys.argv)
  sys.exit(retval)