# Copyright 2022 The Plenoptix Team. All rights reserved.
#
# 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.

"""
Code for deploying the built viewer folder to a server and handing versioning.
We use the library sshconf (https://github.com/sorend/sshconf) for working with the ssh config file.
"""
import json
import os
import subprocess
from os.path import expanduser
from pathlib import Path
from typing import Optional

import dcargs
from sshconf import empty_ssh_config_file, read_ssh_config


def run_cmd(cmd: str):
    """Run a command in the terminal."""
    print("cmd:", cmd)
    print("output:")
    subprocess.Popen(cmd, shell=True).wait()


def main(
    branch_name: str = "",
    ssh_key_string: Optional[str] = None,
    ssh_key_filename: str = " ~/.ssh/github_actions_user_key_filename",
    hostname_or_ip_address: str = "34.102.68.79",
    local_folder: str = "/home/eweb0124/build",
    remote_folder: str = "/home/eweb0124/viewer",
    host: str = "viewer_deploy_host",
    user: str = "eweb0124",
    package_json_filename: str = "package.json",
    increment_version: str = "False",
):
    """Copy a local folder to a remote machine and handle versioning.

    Args:
        ssh_key: The private ssh key needed to ssh.
        hostname_or_ip_address: The hostname or ip_address of the remote machine.
    """

    print()
    print("branch_name", branch_name)
    print("ssh_key_string", ssh_key_string)
    print("ssh_key_filename", ssh_key_filename)
    print("hostname_or_ip_address", hostname_or_ip_address)
    print("local_folder", local_folder)
    print("remote_folder", remote_folder)
    print("host", host)
    print("user", user)
    print("package_json_filename", package_json_filename)
    print("increment_version", increment_version)
    print()

    # save the ssh key to a file
    run_cmd("mkdir ~/.ssh")
    if ssh_key_string:
        run_cmd(f"""rm -f {ssh_key_filename}""")
        run_cmd(f"""echo "{ssh_key_string}" >> {ssh_key_filename}""")
        run_cmd(f"chmod 400 {ssh_key_filename}")

    # setup the config in ~/.ssh/config
    config_filename = expanduser("~/.ssh/config")
    Path(config_filename).parent.mkdir(exist_ok=True)
    try:
        config = read_ssh_config(config_filename)
    except FileNotFoundError:
        config = empty_ssh_config_file()
        config.write(config_filename)
        config = read_ssh_config(config_filename)

    # add the host if it doesn't exist
    if not config.host(host):
        config.add(host)

    config.set(
        host,
        Hostname=hostname_or_ip_address,
        User=user,
        IdentityFile=ssh_key_filename,
        StrictHostKeyChecking="No",
    )

    # show that the config is correct
    run_cmd("cat ~/.ssh/config")

    # save the config file
    config.save()

    # get the version
    with open(package_json_filename, "r", encoding="utf-8") as f:
        package_json = json.load(f)

    # TODO: add logic to increment the version number
    if increment_version == "True":
        raise NotImplementedError()
    else:
        version = package_json["version"]

    print(f"\nusing version: {version}")

    # write to the /home/eweb0124/build folder
    run_cmd(f"""ssh {host} 'rm -rf /home/eweb0124/build'""")
    run_cmd(f"""scp -r {local_folder} {host}:/home/eweb0124/build""")

    # update the symlink of latest
    if branch_name == "master":

        # move the build folder to the correct location
        run_cmd(f"""ssh {host} 'rm -rf {remote_folder}/{version}'""")
        run_cmd(f"""ssh {host} 'cp -R /home/eweb0124/build {remote_folder}/{version}'""")

        run_cmd(f"""ssh {host} 'rm {remote_folder}/latest'""")
        run_cmd(f"""ssh {host} 'ln -s {remote_folder}/{version} {remote_folder}/latest'""")

    # otherwise just move to some branch folder
    else:
        updated_branch_name = branch_name.replace("/", "-")
        run_cmd(f"""ssh {host} 'rm -rf {remote_folder}/branch/{updated_branch_name}'""")
        run_cmd(f"""ssh {host} 'cp -R /home/eweb0124/build {remote_folder}/branch/{updated_branch_name}'""")


if __name__ == "__main__":
    dcargs.cli(main)