#!/usr/bin/env python
#
# Copyright 2013 The Flutter 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 collections
import json
import os
import subprocess
import sys

def GetFIDLFilesRecursive(libraries, sdk_base, path):
  with open(path) as json_file:
    parsed = json.load(json_file)
    result = []
    deps =  parsed['deps']
    for dep in deps:
      dep_meta_json = os.path.abspath('%s/fidl/%s/meta.json' % (sdk_base, dep))
      GetFIDLFilesRecursive(libraries, sdk_base, dep_meta_json)
    libraries[parsed['name']] = result + parsed['sources']

def GetFIDLFilesByLibraryName(sdk_base, root):
  libraries = collections.OrderedDict()
  GetFIDLFilesRecursive(libraries, sdk_base, root)
  return libraries

def main():
  parser = argparse.ArgumentParser();

  parser.add_argument('--fidlc-bin', dest='fidlc_bin', action='store', required=True)
  parser.add_argument('--fidlgen-bin', dest='fidlgen_bin', action='store', required=True)
  
  parser.add_argument('--sdk-base', dest='sdk_base', action='store', required=True)
  parser.add_argument('--root', dest='root', action='store', required=True)
  parser.add_argument('--json', dest='json', action='store', required=True)
  parser.add_argument('--include-base', dest='include_base', action='store', required=True)
  parser.add_argument('--output-base-cc', dest='output_base_cc', action='store', required=True)
  parser.add_argument('--output-c-header', dest='output_header_c', action='store', required=True)
  parser.add_argument('--output-c-tables', dest='output_c_tables', action='store', required=True)

  args = parser.parse_args()

  assert os.path.exists(args.fidlc_bin)
  assert os.path.exists(args.fidlgen_bin)

  fidl_files_by_name = GetFIDLFilesByLibraryName(args.sdk_base, args.root)

  fidlc_command = [
    args.fidlc_bin,
    '--c-header',
    args.output_header_c,
    '--tables',
    args.output_c_tables,
    '--json',
    args.json
  ]

  for _, fidl_files in fidl_files_by_name.iteritems():
    fidlc_command.append('--files')
    for fidl_file in fidl_files:
      fidl_abspath = os.path.abspath('%s/%s' % (args.sdk_base, fidl_file))
      fidlc_command.append(fidl_abspath)

  subprocess.check_call(fidlc_command);

  assert os.path.exists(args.json)

  fidlgen_command = [
    args.fidlgen_bin,
    '-generators',
    'cpp',
    '-include-base',
    args.include_base,
    '-json',
    args.json,
    '-output-base',
    args.output_base_cc
  ]

  subprocess.check_call(fidlgen_command)

  return 0

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