#
#
# Python library with commonly used functions within the package management scope
#
# Author   : Pavlos Emm. Katsoulakis <paul@netdata.cloud>

import lxc
import subprocess

def replace_tag(tag_name, spec, new_tag_content):
    print("Fixing tag %s in %s" % (tag_name, spec))

    ifp = open(spec, "r")
    config = ifp.readlines()
    ifp.close()

    source_line = -1
    for line in config:
        if str(line).count(tag_name + ":") > 0:
            source_line = config.index(line)
            print("Found line: %s in item %d" % (line, source_line))
            break

    if source_line >= 0:
        print("Replacing line %s with %s in spec file" %(config[source_line], new_tag_content))
        config[source_line] = "%s: %s\n" % (tag_name, new_tag_content)
        config_str = ''.join(config)
        ofp = open(spec, 'w')
        ofp.write(config_str)
        ofp.close()

def run_command(container, command):
    print("Running command: %s" % command)
    command_result = container.attach_wait(lxc.attach_run_command, command)

    if command_result != 0:
        raise Exception("Command failed with exit code %d" % command_result)

def run_command_in_host(cmd):
    print("Issue command in host: %s" % str(cmd))

    proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    o, e = proc.communicate()
    print('Output: ' + o.decode('ascii'))
    print('Error: '  + e.decode('ascii'))
    print('code: ' + str(proc.returncode))