# Copyright (C) 2015 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

NPMJS = 'NPMJS'
GERRIT = 'GERRIT'

# NOTE: npm_binary rules do not get their licenses checked by gen_licenses.py,
# as we would have to cut too many edges. DO NOT include these binaries in
# build outputs. Using them in the build _process_ is ok.
def npm_binary(
    name,
    version,
    sha1 = '',
    repository = NPMJS,
    visibility = ['PUBLIC']):

  dir = '%s-%s' % (name, version)
  filename = '%s.tgz' % dir
  dest = '%s@%s.npm_binary.tgz' % (name, version)
  if repository == GERRIT:
    url = 'http://gerrit-maven.storage.googleapis.com/npm-packages/%s' % filename
  elif repository == NPMJS:
    url = 'http://registry.npmjs.org/%s/-/%s' % (name, filename)
  else:
    raise ValueError('invalid repository: %s' % repository)
  cmd = ['$(exe //tools:download_file)', '-o', '$OUT', '-u', url]
  if sha1:
    cmd.extend(['-v', sha1])
  genrule(
    name = name,
    cmd = ' '.join(cmd),
    out = dest,
    visibility = visibility,
  )


def run_npm_binary(target):
  return '$(location //tools/js:run_npm_binary) $(location %s)' % target


def bower_component(
    name,
    package,
    version,
    license,
    deps = [],
    semver = None,
    sha1 = '',
    visibility = ['PUBLIC']):
  download_name = '%s__download_bower' % name
  genrule(
    name = download_name,
    cmd = ' '.join([
      '$(exe //tools/js:download_bower)',
      '-b', '"%s"' % run_npm_binary('//lib/js:bower'),
      '-n', name,
      '-p', package,
      '-v', version,
      '-s', sha1,
      '-o', '$OUT',
    ]),
    out = '%s.zip' % download_name,
    license = license,
    visibility = [],
  )

  renamed_name = '%s__renamed' % name
  genrule(
    name = renamed_name,
    cmd = ' && '.join([
      'cd $TMP',
      'mkdir bower_components',
      'cd bower_components',
      'unzip $(location :%s)' % download_name,
      'cd ..',
      'zip -r $OUT bower_components',
    ]),
    out = '%s.zip' % renamed_name,
    visibility = [],
  )

  genrule(
    name = name,
    cmd = _combine_components([':%s' % renamed_name] + deps),
    out = '%s-%s.zip' % (name, version),
    visibility = visibility,
  )

  version_name = '%s__bower_version' % name
  dep_version = semver if semver is not None else version
  deps_json = '{"%s": "%s#%s"}' % (name, package, dep_version)
  genrule(
    name = version_name,
    cmd = "echo '%s' > $OUT" % deps_json,
    out = version_name,
    visibility = visibility,
  )


def bower_components(
    name,
    deps,
    visibility = ['PUBLIC']):
  genrule(
    name = name,
    cmd = _combine_components(deps),
    out = '%s.bower_components.zip' % name,
    visibility = visibility,
  )


def _combine_components(deps):
  cmds = ['cd $TMP']
  for d in deps:
    cmds.append('unzip -qo $(location %s)' % d)
  cmds.append('zip -r $OUT bower_components')
  return ' && '.join(cmds)


VULCANIZE_FLAGS = [
  '--inline-scripts',
  '--inline-css',
  '--strip-comments',
]

def vulcanize(
    name,
    app,
    srcs,
    components,
    extra_flags = [],
    visibility = ['PUBLIC']):
  genrule(
    name = '%s__vulcanized' % name,
    cmd = ' '.join([
      'unzip', '-qd', '$TMP', '$(location %s)' % components,
      '&&', 'rm', '-rf', '$SRCDIR/bower_components',
      '&&', 'ln', '-s', '-f', '$TMP/bower_components', '.',
      '&&', run_npm_binary('//lib/js:vulcanize')
    ] + VULCANIZE_FLAGS + extra_flags + [
      '--out-html', '$OUT',
      '$SRCDIR/%s' % app,
    ]),
    srcs = srcs,
    out = '%s.vulcanized.html' % name,
    visibility = visibility,
  )

  genrule(
    name = name,
    cmd = ' '.join([
      'cd', '$TMP',
      '&&', run_npm_binary('//lib/js:crisper'), '--always-write-script',
      '--source', '$(location :%s__vulcanized)' % name,
      '--html', '%s.html' % name,
      '--js', '%s.js' % name,
      '&&', 'zip', '$OUT', '%s.html' % name, '%s.js' % name,
    ]),
    out = '%s.vulcanized.zip' % name,
  )