#!/usr/bin/env python3
#
# Copyright: © 2023 Netdata Inc.
# SPDX-License-Identifier: GPL-3.0-or-later
'''Bundle the v2 dashboard code into the agent repo.

   This is designed to be run as part of a GHA workflow, but will work fine outside of one.'''

import os
import shutil
import subprocess

from pathlib import Path

os.chdir(Path(__file__).parent.absolute())

BASEDIR = 'v2'

BASEPATH = Path(BASEDIR)

TMPPATH = Path('tmp')

URLSRC = 'https://app.netdata.cloud/agent.tar.gz'

MAKEFILETEMPLATE = '''
# Auto-generated by bundle_dashboard_v2.py
# Copyright: © 2023 Netdata Inc.
# SPDX-License-Identifier: GPL-3.0-or-later
MAINTAINERCLEANFILES = $(srcdir)/Makefile.in

dist_noinst_DATA = \\
    $(srcdir)/README.md

webv2dir=$(webdir)/v2

dist_webv2_DATA = \\
    {0} \\
    $(NULL)

webv2staticdir=$(webv2dir)/static
dist_webv2static_DATA = \\
    {1} \\
    $(NULL)

webv2staticemailimgdir=$(webv2staticdir)/email/img
dist_webv2staticemailimg_DATA = \\
    {2} \\
    $(NULL)

webv2staticimgdir=$(webv2staticdir)/img
dist_webv2staticimg_DATA = \\
    {3} \\
    $(NULL)

webv2staticimglogososdir=$(webv2staticimgdir)/logos/os
dist_webv2staticimglogosos_DATA = \\
    {4} \\
    $(NULL)

webv2staticimglogosservicesdir=$(webv2staticimgdir)/logos/services
dist_webv2staticimglogosservices_DATA = \\
    {5} \\
    $(NULL)

webv2staticimgmaildir=$(webv2staticimgdir)/mail
dist_webv2staticimgmail_DATA = \\
    {6} \\
    $(NULL)

webv2staticsitepagesholding503dir=$(webv2staticdir)/site/pages/holding-page-503
dist_webv2staticsitepagesholding503_DATA = \\
    {7} \\
    $(NULL)
'''


def copy_dashboard():
    '''Fetch and bundle the dashboard code.'''
    print('Preparing target directory')
    shutil.rmtree(BASEPATH)
    TMPPATH.mkdir()
    print('::group::Fetching dashboard release tarball')
    subprocess.check_call(f'curl -L -o agent.tar { URLSRC }', shell=True)
    print('::endgroup::')
    print('::group::Extracting dashboard release tarball')
    subprocess.check_call(f"tar -xvf agent.tar -C { TMPPATH } --strip-components=1 --exclude='*.br' --exclude='*.gz'", shell=True)
    print('::endgroup::')
    print('Copying files')
    (TMPPATH / 'agent' / BASEDIR).rename(BASEPATH)
    (TMPPATH / 'agent' / 'index.html').rename(Path('./index.html'))
    (TMPPATH / 'agent' / 'registry-access.html').rename('./registry-access.html')
    (TMPPATH / 'agent' / 'registry-alert-redirect.html').rename('./registry-alert-redirect.html')
    (TMPPATH / 'agent' / 'registry-hello.html').rename('./registry-hello.html')
    shutil.copytree(TMPPATH / 'agent' / 'static', Path('./static'), dirs_exist_ok=True)
    shutil.rmtree(TMPPATH)
    print('Copying README.md')
    BASEPATH.joinpath('README.md').symlink_to('../.dashboard-v2-notice.md')
    print('Removing dashboard release tarball')
    BASEPATH.joinpath('..', 'agent.tar').unlink()


def genfilelist(path):
    '''Generate a list of files for the Makefile.'''
    files = [f for f in path.iterdir() if f.is_file() and f.name != 'README.md']
    files = [Path(*f.parts[1:]) for f in files]
    files.sort()
    return ' \\\n    '.join([("$(srcdir)/" + str(f)) for f in files])


def write_makefile():
    '''Write out the makefile for the dashboard code.'''
    print('Generating Makefile')
    MAKEFILEDATA = MAKEFILETEMPLATE.format(
        genfilelist(BASEPATH),
        genfilelist(BASEPATH.joinpath('static')),
        genfilelist(BASEPATH.joinpath('static', 'email', 'img')),
        genfilelist(BASEPATH.joinpath('static', 'img')),
        genfilelist(BASEPATH.joinpath('static', 'img', 'logos', 'os')),
        genfilelist(BASEPATH.joinpath('static', 'img', 'logos', 'services')),
        genfilelist(BASEPATH.joinpath('static', 'img', 'mail')),
        genfilelist(BASEPATH.joinpath('static', 'site', 'pages', 'holding-page-503')),
    )

    BASEPATH.joinpath('Makefile.am').write_text(MAKEFILEDATA)


def list_changed_files():
    '''Create a list of changed files, and set it in an environment variable.'''
    if 'GITHUB_ENV' in os.environ:
        print('Generating file list for commit.')
        subprocess.check_call('echo "COMMIT_FILES<<EOF" >> $GITHUB_ENV', shell=True)
        subprocess.check_call('git status --porcelain=v1 --no-renames --untracked-files=all | rev | cut -d \' \' -f 1 | rev >> $GITHUB_ENV', shell=True)
        subprocess.check_call('echo "EOF" >> $GITHUB_ENV', shell=True)


copy_dashboard()
write_makefile()
list_changed_files()