#!/usr/bin/python

import platform

APT = "/usr/bin/apt-get"
ADD_APT_REPOSITORY = None


def _find_binary():
    binaries = ['/usr/bin/add-apt-repository']

    for e in binaries:
        if os.path.exists(e):
            return e

    module.fail_json(msg='Unabled to find any of the following executables '
                         '%s' % binaries)

def _run(cmd):
    # returns (rc, stdout, stderr) from shell command
    process = subprocess.Popen(cmd, stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE, shell=True)
    stdout, stderr = process.communicate()
    return (process.returncode, stdout, stderr)


def main():
    arg_spec = dict(
        repo=dict(required=True),
        state=dict(default='present', choices=['present', 'absent'])
    )

    module = AnsibleModule(argument_spec=arg_spec)

    global ADD_APT_REPOSITORY

    ADD_APT_REPOSITORY = _find_binary()

    repo = module.params['repo']
    state = module.params['state']

    rc, out, err = _run('%s %s --remove' % (ADD_APT_REPOSITORY, repo))
    existed = 'Error' not in out

    if state == 'absent':
        if not existed:
            module.exit_json(changed=False, repo=repo)
        else:
            module.exit_json(changed=True, repo=repo)

    cmd = '%s %s' % (ADD_APT_REPOSITORY, repo)

    if float(platform.dist()[1]) >= 11.10:
        cmd = cmd + ' -y'

    rc, out, err = _run(cmd)

    changed = rc == 0 and not existed

    if rc != 0:
        module.fail_json(msg=err)

    if changed:
        _run('%s update' % APT)

    module.exit_json(changed=changed, existed=existed, repo=repo, cmd=cmd)

# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>

main()