# oscillode
# Copyright (C) 2024 oscillode Project Contributors
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# blender_maxwell
# Copyright (C) 2024 blender_maxwell Project Contributors
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import sys
import contextlib
import logging
import tempfile
import typing as typ
import zipfile
from pathlib import Path
import itertools
import subprocess

import tomli_w

import info

LogLevel: typ.TypeAlias = int

BL_EXT__MANIFEST_FILENAME = 'blender_manifest.toml'
BL_EXT__SCHEMA_VERSION = '1.0.0'
BL_EXT__TYPE = 'add-on'

####################
# - Generate Manifest
####################
# See https://docs.blender.org/manual/en/4.2/extensions/getting_started.html
# See https://packaging.python.org/en/latest/guides/writing-pyproject-toml
## TODO: More validation and such.
_FIRST_MAINTAINER = info.PROJ_SPEC['project']['maintainers'][0]
_SPDX_LICENSE_NAME = info.PROJ_SPEC['project']['license']['text']

BL_EXT_MANIFEST = {
	'schema_version': BL_EXT__SCHEMA_VERSION,
	# Basics
	'id': info.PROJ_SPEC['project']['name'],
	'name': info.PROJ_SPEC['tool']['bl_ext']['pretty_name'],
	'version': info.PROJ_SPEC['project']['version'],
	'tagline': info.PROJ_SPEC['project']['description'],
	'maintainer': f'{_FIRST_MAINTAINER["name"]} <{_FIRST_MAINTAINER["email"]}>',
	# Blender Compatibility
	'type': BL_EXT__TYPE,
	'blender_version_min': info.PROJ_SPEC['tool']['bl_ext']['blender_version_min'],
	'blender_version_max': info.PROJ_SPEC['tool']['bl_ext']['blender_version_max'],
	'platforms': list(info.PROJ_SPEC['tool']['bl_ext']['platforms'].keys()),
	# OS/Arch Compatibility
	## See https://docs.blender.org/manual/en/dev/extensions/python_wheels.html
	'wheels': [
		f'./wheels/{wheel_path.name}' for wheel_path in info.PATH_WHEELS.iterdir()
	],
	# Permissions
	## * "files" (for access of any filesystem operations)
	## * "network" (for internet access)
	## * "clipboard" (to read and/or write the system clipboard)
	## * "camera" (to capture photos and videos)
	## * "microphone" (to capture audio)
	'permissions': info.PROJ_SPEC['tool']['bl_ext']['permissions'],
	# Addon Tags
	'tags': info.PROJ_SPEC['tool']['bl_ext']['bl_tags'],
	'license': [f'SPDX:{_SPDX_LICENSE_NAME}'],
	'copyright': info.PROJ_SPEC['tool']['bl_ext']['copyright'],
	'website': info.PROJ_SPEC['project']['urls']['Homepage'],
}


####################
# - Generate Init Settings
####################
def generate_init_settings_dict(profile: str) -> dict:
	profile_settings = info.PROJ_SPEC['tool']['bl_ext']['profiles'][profile]

	if profile_settings['use_path_local']:
		base_path = info.PATH_LOCAL
	else:
		base_path = Path('{USER}')

	log_levels = {
		None: logging.NOTSET,
		'debug': logging.DEBUG,
		'info': logging.INFO,
		'warning': logging.WARNING,
		'error': logging.ERROR,
		'critical': logging.CRITICAL,
	}

	return {
		# File Logging
		'use_log_file': profile_settings['use_log_file'],
		'log_file_path': str(base_path / profile_settings['log_file_path']),
		'log_file_level': log_levels[profile_settings['log_file_level']],
		# Console Logging
		'use_log_console': profile_settings['use_log_console'],
		'log_console_level': log_levels[profile_settings['log_console_level']],
	}


####################
# - Wheel Downloader
####################
def download_wheels() -> dict:
	with tempfile.NamedTemporaryFile(delete=False) as f_reqlock:
		reqlock_str = subprocess.check_output(['uv', 'export', '--no-dev'])
		f_reqlock.write(reqlock_str)
		reqlock_path = Path(f_reqlock.name)

	for platform, pypi_platform_tags in info.PROJ_SPEC['tool']['bl_ext'][
		'platforms'
	].items():
		print(f'[{platform}] Downloading Wheels...')
		print()
		print()
		platform_constraints = list(
			itertools.chain.from_iterable(
				[
					['--platform', pypi_platform_tag]
					for pypi_platform_tag in pypi_platform_tags
				]
			)
		)
		subprocess.check_call(
			[
				sys.executable,
				'-m',
				'pip',
				'download',
				'--requirement',
				str(reqlock_path),
				'--dest',
				str(info.PATH_WHEELS),
				'--require-hashes',
				'--only-binary',
				':all:',
				'--python-version',
				info.REQ_PYTHON_VERSION,
			]
			+ platform_constraints
		)
		print()


####################
# - Pack Extension to ZIP
####################
def pack_bl_extension(  # noqa: PLR0913
	profile: str,
	replace_if_exists: bool = False,
) -> typ.Iterator[Path]:
	"""Context manager exposing a folder as a (temporary) zip file.

	Parameters:
		path_addon_pkg: Path to the folder containing __init__.py of the Blender addon.
		path_addon_zip: Path to the Addon ZIP to generate.
		path_pyproject_toml: Path to the `pyproject.toml` of the project.
			This is made available to the addon, to de-duplicate definition of name,
	The .zip file is deleted afterwards, unless `remove_after_close` is specified.
	"""
	# Delete Existing ZIP (maybe)
	if info.PATH_ZIP.is_file():
		if replace_if_exists:
			msg = 'File already exists where extension ZIP would be generated ({info.PATH_ZIP})'
			raise ValueError(msg)
		info.PATH_ZIP.unlink()

	init_settings: dict = generate_init_settings_dict(profile)

	# Create New ZIP file of the addon directory
	with zipfile.ZipFile(info.PATH_ZIP, 'w', zipfile.ZIP_DEFLATED) as f_zip:
		# Write Blender Extension Manifest
		print('Writing Blender Extension Manifest...')
		f_zip.writestr(BL_EXT__MANIFEST_FILENAME, tomli_w.dumps(BL_EXT_MANIFEST))

		# Write Init Settings
		print('Writing Init Settings...')
		f_zip.writestr(
			info.PROJ_SPEC['tool']['bl_ext']['packaging']['init_settings_filename'],
			tomli_w.dumps(init_settings),
		)

		# Install Addon Files @ /*
		print('Writing Addon Files Settings...')
		for file_to_zip in info.PATH_PKG.rglob('*'):
			f_zip.write(file_to_zip, file_to_zip.relative_to(info.PATH_PKG.parent))

		# Install Wheels @ /wheels/*
		print('Writing Wheels...')
		for wheel_to_zip in info.PATH_WHEELS.rglob('*'):
			f_zip.write(wheel_to_zip, Path('wheels') / wheel_to_zip.name)

	# Delete the ZIP
	print('Packed Blender Extension!')


####################
# - Run Blender w/Clean Addon Reinstall
####################
if __name__ == '__main__':
	if not list(info.PATH_WHEELS.iterdir()) or '--download-wheels' in sys.argv:
		download_wheels()

	profile = sys.argv[1]
	if sys.argv[1] in ['dev', 'release', 'release-debug']:
		pack_bl_extension(profile)
	else:
		msg = f'Packaging profile "{profile}" is invalid. Refer to source of pack.py for more information'
		raise ValueError(msg)