#!/usr/bin/env vpython
#
# Copyright 2019 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.
"""
Helper to manage DEPS. Use this script to update node_modules instead of
running npm install manually. To upgrade a dependency, change the version
number in DEPS below and run this script.
"""

import os
import os.path as path
import json
import shutil
import subprocess
import sys

scripts_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(scripts_path)

import devtools_paths

LICENSES = [
    "MIT",
    "Apache-2.0",
    "BSD",
    "BSD-2-Clause",
    "BSD-3-Clause",
    "CC0-1.0",
    "CC-BY-3.0",
    "CC-BY-4.0",
    "ISC",
    "MPL-2.0",
]

# List all DEPS here.
DEPS = {
    "@rollup/plugin-commonjs": "17.0.0",
    "@types/chai": "4.2.14",
    "@types/codemirror": "0.0.100",
    "@types/karma-chai-sinon": "0.1.15",
    "@types/estree": "0.0.45",
    "@types/filesystem": "0.0.29",
    "@types/mocha": "8.0.4",
    "@types/sinon": "9.0.9",
    "@typescript-eslint/parser": "4.9.0",
    "@typescript-eslint/eslint-plugin": "4.9.0",
    "bl": "4.0.3",
    "chai": "4.2.0",
    "escodegen": "2.0.0",
    "eslint": "7.14.0",
    "eslint-plugin-import": "2.22.1",
    "eslint-plugin-lit-a11y": "1.0.1",
    "eslint-plugin-mocha": "8.0.0",
    "eslint-plugin-rulesdir": "0.1.0",
    "karma": "5.2.3",
    "karma-chai": "0.1.0",
    "karma-chrome-launcher": "3.1.0",
    "karma-coverage": "2.0.3",
    "karma-mocha": "2.0.1",
    "karma-sinon": "1.0.5",
    "karma-sourcemap-loader": "0.3.8",
    "karma-spec-reporter": "0.0.32",
    "license-checker": "25.0.1",
    "mocha": "8.2.1",
    "puppeteer": "7.0.4",
    "recast": "0.20.4",
    "rimraf": "3.0.2",
    "rollup": "2.34.0",
    "rollup-plugin-terser": "7.0.2",
    "sinon": "9.2.1",
    "source-map-support": "0.5.19",
    "stylelint": "13.8.0",
    "stylelint-config-standard": "20.0.0",
    "typescript": "4.2.0-beta",
    "yargs": "16.1.1",
}

def exec_command(cmd):
    try:
        new_env = os.environ.copy()
        # Prevent large files from being checked in to git.
        new_env["PUPPETEER_SKIP_CHROMIUM_DOWNLOAD"] = "true"
        cmd_proc_result = subprocess.check_call(cmd,
                                                cwd=devtools_paths.root_path(),
                                                env=new_env)
    except Exception as error:
        print(error)
        return True

    return False


def ensure_licenses():
    cmd = [
        devtools_paths.node_path(),
        devtools_paths.license_checker_path(),
        '--onlyAllow',
        ('%s' % (';'.join(LICENSES)))
    ]

    return exec_command(cmd)


def strip_private_fields():
    # npm adds private fields which need to be stripped.
    pattern = path.join(devtools_paths.node_modules_path(), 'package.json')
    packages = []
    for root, dirnames, filenames in os.walk(devtools_paths.node_modules_path()):
        for filename in filter(lambda f: f == 'package.json', filenames):
            packages.append(path.join(root, filename))

    for pkg in packages:
        with open(pkg, 'r+') as pkg_file:
            try:
                pkg_data = json.load(pkg_file)

                # Remove anything that begins with an underscore, as these are
                # the private fields in a package.json
                for key in pkg_data.keys():
                    if key.find(u'_') == 0:
                        pkg_data.pop(key)

                pkg_file.truncate(0)
                pkg_file.seek(0)
                json.dump(pkg_data, pkg_file, indent=2, sort_keys=True, separators=(',', ': '))
                pkg_file.write('\n')
            except:
                print('Unable to fix: %s' % pkg)
                return True

    return False


# Required to keep the package-lock.json in sync with the package.json dependencies
def install_missing_deps():
    with open(devtools_paths.package_lock_json_path(), 'r+') as pkg_lock_file:
        try:
            pkg_lock_data = json.load(pkg_lock_file)
            existing_deps = pkg_lock_data[u'dependencies']
            new_deps = []

            # Find any new DEPS and add them in.
            for dep, version in DEPS.items():
                if not dep in existing_deps or not existing_deps[dep]['version'] == version:
                    new_deps.append("%s@%s" % (dep, version))

            # Now install.
            if len(new_deps) > 0:
                cmd = ['npm', 'install', '--save-dev']
                cmd.extend(new_deps)
                return exec_command(cmd)

        except Exception as exception:
            print('Unable to install: %s' % exception)
            return True

    return False


def append_package_json_entries():
    with open(devtools_paths.package_json_path(), 'r+') as pkg_file:
        try:
            pkg_data = json.load(pkg_file)

            # Replace the dev deps.
            pkg_data[u'devDependencies'] = DEPS

            pkg_file.truncate(0)
            pkg_file.seek(0)
            json.dump(pkg_data, pkg_file, indent=2, sort_keys=True, separators=(',', ': '))
            pkg_file.write('\n')

        except:
            print('Unable to fix: %s' % sys.exc_info()[0])
            return True
    return False


def remove_package_json_entries():
    with open(devtools_paths.package_json_path(), 'r+') as pkg_file:
        try:
            pkg_data = json.load(pkg_file)

            # Remove the dependencies and devDependencies from the root package.json
            # so that they can't be used to overwrite the node_modules managed by this file.
            for key in pkg_data.keys():
                if key.find(u'dependencies') == 0 or key.find(u'devDependencies') == 0:
                    pkg_data.pop(key)

            pkg_file.truncate(0)
            pkg_file.seek(0)
            json.dump(pkg_data, pkg_file, indent=2, sort_keys=True, separators=(',', ': '))
            pkg_file.write('\n')
        except:
            print('Unable to fix: %s' % pkg)
            return True
    return False


def addClangFormat():
    with open(path.join(devtools_paths.node_modules_path(), '.clang-format'), 'w+') as clang_format_file:
        try:
            clang_format_file.write('DisableFormat: true\n')
        except:
            print('Unable to write .clang-format file')
            return True
    return False


def addOwnersFile():
    with open(path.join(devtools_paths.node_modules_path(), 'OWNERS'),
              'w+') as owners_file:
        try:
            owners_file.write('file://INFRA_OWNERS\n')
        except:
            print('Unable to write OWNERS file')
            return True
    return False

def addChromiumReadme():
    with open(path.join(devtools_paths.node_modules_path(), 'README.chromium'),
              'w+') as readme_file:
        try:
            readme_file.write('This directory hosts all packages downloaded from NPM that are used in either the build system or infrastructure scripts.\n')
            readme_file.write('If you want to make any changes to this directory, please see "scripts/deps/manage_node_deps.py".\n')
        except:
            print('Unable to write README.chromium file')
            return True
    return False


def run_npm_command(npm_command_args=None):
    for (name, version) in DEPS.items():
        if (version.find(u'^') == 0):
            print('Versions must be locked to a specific version; remove ^ from the start of the version.')
            return True

    run_custom_command = npm_command_args is not None

    if append_package_json_entries():
        return True

    if install_missing_deps():
        return True

    runs_analysis_command = False

    if run_custom_command:
        runs_analysis_command = npm_command_args[:1] == [
            'outdated'
        ] or npm_command_args[:1] == ['audit']

    # By default, run the CI version of npm, which prevents updates to the versions of modules.
    # However, when we are analyzing the installed NPM dependencies, we don't need to run
    # the installation process again.
    if not runs_analysis_command and exec_command(['npm', 'ci']):
        return True

    if run_custom_command:
        custom_command_result = exec_command(['npm'] + npm_command_args)

    if remove_package_json_entries():
        return True

    if strip_private_fields():
        return True

    if addClangFormat():
        return True

    if addOwnersFile():
        return True

    if addChromiumReadme():
        return True

    if run_custom_command:
        return custom_command_result

    return ensure_licenses()


npm_args = None

if (len(sys.argv[1:]) > 0):
    npm_args = sys.argv[1:]

npm_errors_found = run_npm_command(npm_args)

if npm_errors_found:
    print('npm command failed')
    exit(1)