#! /usr/bin/env python3
# MegEngine is Licensed under the Apache License, Version 2.0 (the "License")
#
# Copyright (c) 2014-2021 Megvii Inc. All rights reserved.
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT ARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
import argparse
import contextlib
import getopt
import http.server
import os
import runpy
import sys
import tempfile

from megengine.logger import get_logger


def main():
    parser = argparse.ArgumentParser(
        prog="megengine.tools.svg_viewer",
        description="View SVG Graph produced bt megengine profiler",
    )
    parser.add_argument("-p", "--port", type=int, default=8000, help="server port")
    parser.add_argument(
        "-a", "--address", type=str, default="localhost", help="server address"
    )
    args = parser.parse_args()
    address = args.address
    port = args.port
    src_filename = "svg_viewer.html"
    dst_filename = "index.html"
    src_path = os.path.join(os.path.dirname(__file__), src_filename)
    url = "http://{}:{}/{}".format("localhost", port, dst_filename)
    ssh_fwd_cmd = "ssh -L {}:localhost:{} <remote ip>".format(port, port)
    with tempfile.TemporaryDirectory() as serve_dir:
        dst_path = os.path.join(serve_dir, dst_filename)
        os.symlink(src_path, dst_path)
        os.chdir(serve_dir)
        get_logger().info("cd to serve directory: {}, starting".format(serve_dir))
        server = http.server.HTTPServer(
            (address, port), http.server.SimpleHTTPRequestHandler
        )
        get_logger().info(
            "server started, please visit '{}' to watch profiling result".format(url)
        )
        get_logger().info(
            "if you are in remote environment, use '{}' to forward port to local".format(
                ssh_fwd_cmd
            )
        )
        try:
            server.serve_forever()
        except KeyboardInterrupt:
            get_logger().info("server exiting")


if __name__ == "__main__":
    main()