#!/usr/bin/python
# Copyright 2021 Northern.tech AS
#
#    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 subprocess


class Cli:
    """Simple wrapper for subprocess"""

    def __init__(self, path="mender-cli"):
        self.path = path

    def run(self, *argv):
        """Returns a CompletedProcess wrapped in CliResult"""
        args = [self.path] + list(argv)
        completed = subprocess.run(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        return CliResult(completed)

    def run_and_enter_password(self, *argv, password=""):
        """Returns a CompletedProcess wrapped in CliResult"""
        args = [self.path] + list(argv)
        p = subprocess.Popen(
            args,
            shell=True,
            stdin=subprocess.PIPE,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
        )
        stdout, stderr = p.communicate(input=password.encode() + b"\n")
        return CliResult(p, stdout=stdout, stderr=stderr)


class CliResult:
    """Wraps CompletedProcess, decodes output to strings"""

    def __init__(self, completed_process, stdout=None, stderr=None):
        self.completed_process = completed_process

        self.returncode = completed_process.returncode
        self.stdout = (
            self.completed_process.stdout.decode("utf-8") if stdout is None else stdout
        )
        self.stderr = (
            self.completed_process.stderr.decode("utf-8") if stderr is None else stderr
        )
