#!/usr/bin/env python
# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import argparse
import logging
import sys

from devtoolslib import paths
from devtoolslib import shell_arguments

_USAGE = ("mojo_run "
         "[--args-for=<mojo-app>] "
         "[--content-handlers=<handlers>] "
         "[--enable-external-applications] "
         "[--disable-cache] "
         "[--enable-multiprocess] "
         "[<mojo-app>] "
         """

A <mojo-app> is a Mojo URL or a Mojo URL and arguments within quotes.
Example: mojo_run "mojo:js_standalone test.js".
<url-lib-path> is searched for shared libraries named by mojo URLs.
The value of <handlers> is a comma separated list like:
text/html,mojo:html_viewer,application/javascript,mojo:js_content_handler
""")

_DESCRIPTION = """Runner for Mojo applications.

Any arguments not recognized by the script will be passed on as shell arguments.
"""


# Port on which the mojo:debugger http server will be available on the host
# machine.
_MOJO_DEBUGGER_PORT = 7777
_DEFAULT_WINDOW_MANAGER = "mojo:kiosk_wm"


def _configure_debugger(shell):
  """Configures mojo:debugger to run and sets up port forwarding for its http
  server if the shell is running on a device.

  Returns:
    Arguments that need to be appended to the shell argument list in order to
    run with the debugger.
  """
  shell.ForwardHostPortToShell(_MOJO_DEBUGGER_PORT)
  return ['mojo:debugger %d' % _MOJO_DEBUGGER_PORT]


def main():
  logging.basicConfig()

  parser = argparse.ArgumentParser(usage=_USAGE, description=_DESCRIPTION)

  # Arguments allowing to indicate the configuration we are targeting when
  # running within a Chromium-like checkout. These will go away once we have
  # devtools config files, see https://github.com/domokit/devtools/issues/28.
  chromium_config_group = parser.add_argument_group('Chromium configuration',
      'These arguments allow to infer paths to tools and build results '
      'when running withing a Chromium-like checkout')
  debug_group = chromium_config_group.add_mutually_exclusive_group()
  debug_group.add_argument('--debug', help='Debug build (default)',
                           default=True, action='store_true')
  debug_group.add_argument('--release', help='Release build', default=False,
                           dest='debug', action='store_false')
  chromium_config_group.add_argument('--target-cpu',
                                     help='CPU architecture to run for.',
                                     choices=['x64', 'x86', 'arm'])

  shell_arguments.add_shell_arguments(parser)
  parser.add_argument('--no-debugger', action="store_true",
                      help='Do not spawn mojo:debugger.')
  parser.add_argument('--window-manager', default=_DEFAULT_WINDOW_MANAGER,
                      help='Window manager app to be mapped as '
                      'mojo:window_manager. By default it is ' +
                      _DEFAULT_WINDOW_MANAGER)
  parser.add_argument('--sky',
                      help='Loads the given Sky file.')

  script_args, shell_args = parser.parse_known_args()

  # Infer paths based on the config if running within a Chromium-like checkout.
  mojo_paths, _ = paths.infer_mojo_paths(script_args.android,
                                         script_args.debug,
                                         script_args.target_cpu)
  if mojo_paths:
    if script_args.android and not script_args.adb_path:
      script_args.adb_path = mojo_paths['adb']
    if script_args.android and not script_args.origin:
      script_args.origin = mojo_paths['build']
    if not script_args.shell_path:
      script_args.shell_path = mojo_paths['shell']

    if script_args.verbose:
      print 'Running within a Chromium-style checkout.'
      print ' - using the locally built shell at: ' + script_args.shell_path
      if script_args.origin:
        print ' - using the origin:  ' + script_args.origin
      if script_args.android:
        print ' - using the adb path: ' + script_args.adb_path
  elif script_args.verbose:
    print 'Running outside a Chromium-style checkout.'

  try:
    shell, shell_args = shell_arguments.configure_shell(script_args, shell_args)
  except shell_arguments.ShellConfigurationException as e:
    print e
    return 1

  if not script_args.no_debugger:
    if script_args.verbose:
      print 'Spawning mojo:debugger, use `mojo_debug` to inspect the shell.'
      print 'Note that mojo:debugger will prevent the shell from terminating,'
      print '  pass --no-debugger to skip spawning mojo:debugger.'
    shell_args.extend(_configure_debugger(shell))

  shell_args = shell_arguments.append_to_argument(shell_args, '--url-mappings=',
                                                  'mojo:window_manager=%s' %
                                                  script_args.window_manager)

  if script_args.sky:
    if not mojo_paths:
      print 'Running with --sky is not supported outside of the Mojo checkout.'
      # See https://github.com/domokit/devtools/issues/27.
      return 1
    shell_args.extend(shell_arguments._configure_sky(shell, mojo_paths['root'],
                                                     mojo_paths['sky_packages'],
                                                     script_args.sky))

  if script_args.verbose:
    print "Shell arguments: " + str(shell_args)

  shell.Run(shell_args)
  return 0


if __name__ == "__main__":
  sys.exit(main())