#!/usr/bin/env python3

# Copyright The OpenTelemetry Authors
#
# 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.

import logging
import os
import subprocess
import sys

from jinja2 import Template

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger("setupy_generator")

_auto_generation_msg = """
# DO NOT EDIT. THIS FILE WAS AUTOGENERATED FROM templates/{source}.
# RUN `python scripts/generate_setup.py` TO REGENERATE.
"""
_template_dir = "templates"
_template_name = "instrumentation_setup.py.txt"
_prefix = "opentelemetry-instrumentation-"


def main():
    root_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    with open(
        os.path.join(root_path, _template_dir, _template_name),
        encoding="utf-8",
    ) as template:
        setuppy_tmpl = Template(template.read())
    base_instrumentation_path = os.path.join(root_path, "instrumentation")

    for instrumentation in os.listdir(base_instrumentation_path):
        instrumentation_path = os.path.join(
            base_instrumentation_path, instrumentation
        )
        if not os.path.isdir(
            instrumentation_path
        ) or not instrumentation.startswith(_prefix):
            continue

        src_dir = os.path.join(
            instrumentation_path, "src", "opentelemetry", "instrumentation"
        )
        src_pkgs = [
            f
            for f in os.listdir(src_dir)
            if os.path.isdir(os.path.join(src_dir, f))
        ]
        assert len(src_pkgs) == 1
        name = src_pkgs[0]
        generated = setuppy_tmpl.render(
            name=name,
            auto_generation_msg=_auto_generation_msg.format(
                source=_template_name
            ),
        )

        generated_file = os.path.join(instrumentation_path, "setup.py")
        logger.info("generated %s", generated_file)
        with open(generated_file, "w", encoding="utf-8") as fh:
            fh.write(generated)
            fh.flush()

    subprocess.run(
        [
            sys.executable,
            "scripts/eachdist.py",
            "format",
            "--path",
            "instrumentation",
        ],
        check=True,
    )


if __name__ == "__main__":
    main()
