#!/usr/bin/python2.4
# Copyright 2009, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# 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.
#     * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#     * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


"""Docbuilder for O3D and o3djs."""


import os
import os.path
import sys
import imp
import types
import glob
import subprocess
import shutil
import re


_java_exe = ''
_output_dir = ''
_third_party_dir = ''
_script_path = os.path.dirname(os.path.realpath(__file__))
_js_copyright = """
/*
 * Copyright 2009, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * 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.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
"""

GlobalsDict = { }


def MakePath(*file_paths):
  """Makes a path absolute given a path relative to this script."""
  return os.path.join(_script_path, *file_paths)


def UpdateGlobals(dict):
  """Copies pairs from dict into GlobalDict."""
  for i, v in dict.items():
    GlobalsDict.__setitem__(i, v)


def GetCallingNamespaces():
  """Return the locals and globals for the function that called
  into this module in the current call stack."""
  try: 1/0
  except ZeroDivisionError:
    # Don't start iterating with the current stack-frame to
    # prevent creating reference cycles (f_back is safe).
    frame = sys.exc_info()[2].tb_frame.f_back

  # Find the first frame that *isn't* from this file
  while frame.f_globals.get("__name__") == __name__:
    frame = frame.f_back

  return frame.f_locals, frame.f_globals


def ComputeExports(exports):
  """Compute a dictionary of exports given one of the parameters
  to the Export() function or the exports argument to SConscript()."""

  loc, glob = GetCallingNamespaces()

  retval = {}
  try:
    for export in exports:
      if isinstance(export, types.DictType):
        retval.update(export)
      else:
        try:
          retval[export] = loc[export]
        except KeyError:
          retval[export] = glob[export]
  except KeyError, x:
    raise Error, "Export of non-existent variable '%s'"%x

  return retval


def Export(*vars):
  """Copies the named variables to GlobalDict."""
  for var in vars:
    UpdateGlobals(ComputeExports(vars))


def Import(filename):
  """Imports a python file in a scope with 'Export' defined."""
  scope = {'__builtins__': globals()['__builtins__'],
           'Export': Export}
  file = open(filename, 'r')
  exec file in scope
  file.close()


def Execute(args):
  """Executes an external program."""
  # Comment the next line in for debugging.
  # print "Execute: ", ' '.join(args)
  if subprocess.call(args) > 0:
    raise RuntimeError('FAILED: ' + ' '.join(args))


def AppendBasePath(folder, filenames):
  """Appends a base path to a ist of files"""
  return [os.path.join(folder, filename) for filename in filenames]


def RunNixysa(idl_files, generate, output_dir, nixysa_options):
  """Executes Nixysa."""
  Execute([
    sys.executable,
    MakePath(_third_party_dir, 'nixysa', 'codegen.py'),
    '--binding-module=o3d:%s' % MakePath('..', 'plugin', 'o3d_binding.py'),
    '--generate=' + generate,
    '--force',
    '--output-dir=' + output_dir] +
    nixysa_options +
    idl_files)


def RunJSDocToolkit(js_files, ezt_output_dir, html_output_dir, prefix, mode,
                    baseURL, topURL, exports_file):
  """Executes the JSDocToolkit."""
  list_filename = MakePath(_output_dir, 'doclist.conf')
  f = open(list_filename, 'w')
  f.write('{\nD:{\n')
  f.write('prefix: "%s",\n' % prefix)
  f.write('baseURL: "%s",\n' % baseURL)
  f.write('topURL: "%s",\n' % topURL)
  f.write('mode: "%s",\n' % mode)
  f.write('htmlOutDir: "%s",\n' % html_output_dir.replace('\\', '/'))
  f.write('exportsFile: "%s",\n' % exports_file.replace('\\', '/'))
  f.write('endMarker: ""\n')
  f.write('},\n')
  f.write('_: [\n')
  for filename in js_files:
    f.write('"%s",\n' % filename.replace('\\', '/'))
  f.write(']\n}\n')
  f.close()

  files_dir = MakePath(_third_party_dir, 'jsdoctoolkit', 'files')
  Execute([
    _java_exe,
    '-Djsdoc.dir=%s' % files_dir,
    '-jar',
    MakePath(files_dir, 'jsrun.jar'),
    MakePath(files_dir, 'app', 'run.js'),
    '-v',
    '-t=%s' % MakePath('jsdoc-toolkit-templates'),
    '-d=' + ezt_output_dir,
    '-c=' + list_filename])


def DeleteOldDocs(docs_js_outpath):
  try:
    shutil.rmtree(docs_js_outpath);
  except:
    pass

def BuildJavaScriptForDocsFromIDLs(idl_files, output_dir):
  RunNixysa(idl_files, 'jsheader', output_dir, ['--properties-equal-undefined'])


def BuildJavaScriptForExternsFromIDLs(idl_files, output_dir):
  if (os.path.exists(output_dir)):
    for filename in glob.glob(os.path.join(output_dir, '*.js')):
      os.unlink(filename)
  RunNixysa(idl_files, 'jsheader', output_dir, ['--no-return-docs'])


def BuildO3DDocsFromJavaScript(js_files, ezt_output_dir, html_output_dir):
  RunJSDocToolkit(js_files, ezt_output_dir, html_output_dir,
                  'classo3d_1_1_', 'o3d', '', '', '')


def BuildO3DJSDocs(js_files, ezt_output_dir, html_output_dir, exports_file):
  RunJSDocToolkit(js_files, ezt_output_dir, html_output_dir, 'js_1_0_', 'o3djs',
                  'jsdocs', '..', exports_file)


def BuildO3DExternsFile(js_files_dir, extra_externs_file, externs_file):
  outfile = open(externs_file, 'w')
  filenames = (glob.glob(os.path.join(js_files_dir, '*.js')) +
               [extra_externs_file])
  for filename in filenames:
    print "-----", filename
    infile = open(filename, 'r')
    lines = infile.readlines()
    infile.close()
    filtered = []
    skipping = False
    # strip out @o3dparameter stuff
    for line in lines:
      if skipping:
        if line.startswith('* @') or line.startswith(' */'):
          skipping = False
      if not skipping:
        if line.startswith(' * @o3dparameter'):
          skipping = True
      if not skipping:
        filtered.append(line)
    outfile.write(''.join(filtered))
  outfile.close()


def BuildCompiledO3DJS(o3djs_files,
                       externs_path,
                       o3d_externs_js_path,
                       compiled_o3djs_outpath):
  Execute([
    _java_exe,
    '-jar',
    MakePath('..', '..', 'o3d-internal', 'jscomp', 'JSCompiler_deploy.jar'),
    '--property_renaming', 'OFF',
    '--variable_renaming', 'LOCAL',
    '--strict',
    '--externs=%s' % externs_path,
    ('--externs=%s' % o3d_externs_js_path),
    ('--js_output_file=%s' % compiled_o3djs_outpath)] +
    ['-js=%s' % (x, ) for x in o3djs_files]);

  # strip out goog.exportSymbol and move o3djs.require to end
  file = open(compiled_o3djs_outpath, 'r')
  contents = file.read()
  file.close()
  contents = re.sub(r'goog.exportSymbol\([^\)]*\);', '', contents)
  requires = set(re.findall(r'o3djs.require\([^\)]*\);', contents))
  contents = re.sub(r'o3djs.require\([^\)]*\);', '', contents)
  file = open(compiled_o3djs_outpath, 'w')
  file.write(_js_copyright)
  file.write(contents)
  file.write('\n')
  file.write('\n'.join(requires))
  file.close()


def CopyStaticFiles(o3d_docs_ezt_outpath, o3d_docs_html_outpath):
  files = ['stylesheet.css',
           'prettify.css',
           'prettify.js',
           'tabs.css',
           'tab_l.gif',
           'tab_r.gif',
           'tab_b.gif']
  for file in files:
    shutil.copyfile(MakePath('jsdoc-toolkit-templates', 'static', file),
                    MakePath(os.path.join(o3d_docs_ezt_outpath, file)))
    shutil.copyfile(MakePath('jsdoc-toolkit-templates', 'static', file),
                    MakePath(os.path.join(o3d_docs_html_outpath, file)))


def main(argv):
  """Builds the O3D API docs and externs and the o3djs docs."""
  global _java_exe
  _java_exe = argv[0]
  global _third_party_dir
  _third_party_dir = argv[1]

  # Fix up the python path of subprocesses by setting PYTHONPATH.
  pythonpath = os.pathsep.join([MakePath(_third_party_dir, 'gflags', 'python'),
                                MakePath(_third_party_dir, 'ply')])

  orig_pythonpath = os.environ.get('PYTHONPATH')
  if orig_pythonpath:
    pythonpath = os.pathsep.join([pythonpath, orig_pythonpath])

  os.environ['PYTHONPATH'] = pythonpath

  js_list_filename = MakePath('..', 'samples', 'o3djs', 'js_list.scons')
  idl_list_filename = MakePath('..', 'plugin', 'idl_list.scons')
  js_list_basepath = os.path.dirname(js_list_filename)
  idl_list_basepath = os.path.dirname(idl_list_filename)

  global _output_dir
  _output_dir = argv[2]
  docs_outpath = os.path.join(_output_dir, 'documentation')
  docs_js_outpath = MakePath(docs_outpath, 'apijs')
  externs_js_outpath = MakePath(_output_dir, 'externs')
  o3d_docs_ezt_outpath = MakePath(docs_outpath, 'reference')
  o3d_docs_html_outpath = MakePath(docs_outpath, 'local_html')
  o3djs_docs_ezt_outpath = MakePath(docs_outpath, 'reference', 'jsdocs')
  o3djs_docs_html_outpath = MakePath(docs_outpath, 'local_html', 'jsdocs')
  o3d_externs_path = MakePath(_output_dir, 'o3d-externs.js')
  o3djs_exports_path = MakePath(_output_dir, 'o3d-exports.js')
  compiled_o3djs_outpath = MakePath(docs_outpath, 'base.js')
  externs_path = MakePath('externs', 'externs.js')
  o3d_extra_externs_path = MakePath('externs', 'o3d-extra-externs.js')

  Import(js_list_filename)
  Import(idl_list_filename)

  idl_files = AppendBasePath(idl_list_basepath, GlobalsDict['O3D_IDL_SOURCES'])
  o3djs_files = AppendBasePath(js_list_basepath, GlobalsDict['O3D_JS_SOURCES'])

  # we need to put base.js first?
  o3djs_files = (
      filter(lambda x: x.endswith('base.js'), o3djs_files) +
      filter(lambda x: not x.endswith('base.js'), o3djs_files))

  docs_js_files = [os.path.join(
                       docs_js_outpath,
                       os.path.splitext(os.path.basename(f))[0] + '.js')
                   for f in GlobalsDict['O3D_IDL_SOURCES']]

  DeleteOldDocs(MakePath(docs_outpath))
  BuildJavaScriptForDocsFromIDLs(idl_files, docs_js_outpath)
  BuildO3DDocsFromJavaScript([o3d_extra_externs_path] + docs_js_files,
                             o3d_docs_ezt_outpath, o3d_docs_html_outpath)
  BuildJavaScriptForExternsFromIDLs(idl_files, externs_js_outpath)
  BuildO3DExternsFile(externs_js_outpath,
                      o3d_extra_externs_path,
                      o3d_externs_path)
  BuildO3DJSDocs(o3djs_files + [o3d_externs_path], o3djs_docs_ezt_outpath,
                 o3djs_docs_html_outpath, o3djs_exports_path)
  CopyStaticFiles(o3d_docs_ezt_outpath, o3d_docs_html_outpath)
  BuildCompiledO3DJS(o3djs_files + [o3djs_exports_path],
                     externs_path,
                     o3d_externs_path,
                     compiled_o3djs_outpath)


if __name__ == '__main__':
  main(sys.argv[1:])