# This code is part of Ansible, but is an independent component.
# This particular file snippet, and this file snippet only, is BSD licensed.
# Modules you write using this snippet, which is embedded dynamically by Ansible
# still belong to the author of the module, and may assign their own license
# to the complete work.
#
# (c) 2016 Red Hat Inc.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
#    * Redistributions of source code must retain the above copyright
#      notice, this list of conditions and the following disclaimer.
#    * Redistributions in binary form must reproduce the above copyright notice,
#      this list of conditions and the following disclaimer in the documentation
#      and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
from ansible.module_utils._text import to_text
from ansible.module_utils.basic import env_fallback, return_values
from ansible.module_utils.network.common.utils import to_list, ComplexList
from ansible.module_utils.connection import exec_command

_DEVICE_CONFIGS = {}

aireos_provider_spec = {
    'host': dict(),
    'port': dict(type='int'),
    'username': dict(fallback=(env_fallback, ['ANSIBLE_NET_USERNAME'])),
    'password': dict(fallback=(env_fallback, ['ANSIBLE_NET_PASSWORD']), no_log=True),
    'ssh_keyfile': dict(fallback=(env_fallback, ['ANSIBLE_NET_SSH_KEYFILE']), type='path'),
    'timeout': dict(type='int'),
}
aireos_argument_spec = {
    'provider': dict(type='dict', options=aireos_provider_spec)
}

aireos_top_spec = {
    'host': dict(removed_in_version=2.9),
    'port': dict(removed_in_version=2.9, type='int'),
    'username': dict(removed_in_version=2.9),
    'password': dict(removed_in_version=2.9, no_log=True),
    'ssh_keyfile': dict(removed_in_version=2.9, type='path'),
    'timeout': dict(removed_in_version=2.9, type='int'),
}
aireos_argument_spec.update(aireos_top_spec)


def sanitize(resp):
    # Takes response from device and strips whitespace from all lines
    # Aireos adds in extra preceding whitespace which netcfg parses as children/parents, which Aireos does not do
    # Aireos also adds in trailing whitespace that is unused
    cleaned = []
    for line in resp.splitlines():
        cleaned.append(line.strip())
    return '\n'.join(cleaned).strip()


def get_provider_argspec():
    return aireos_provider_spec


def check_args(module, warnings):
    pass


def get_config(module, flags=None):
    flags = [] if flags is None else flags

    cmd = 'show run-config commands '
    cmd += ' '.join(flags)
    cmd = cmd.strip()

    try:
        return _DEVICE_CONFIGS[cmd]
    except KeyError:
        rc, out, err = exec_command(module, cmd)
        if rc != 0:
            module.fail_json(msg='unable to retrieve current config', stderr=to_text(err, errors='surrogate_then_replace'))
        cfg = sanitize(to_text(out, errors='surrogate_then_replace').strip())
        _DEVICE_CONFIGS[cmd] = cfg
        return cfg


def to_commands(module, commands):
    spec = {
        'command': dict(key=True),
        'prompt': dict(),
        'answer': dict()
    }
    transform = ComplexList(spec, module)
    return transform(commands)


def run_commands(module, commands, check_rc=True):
    responses = list()
    commands = to_commands(module, to_list(commands))
    for cmd in commands:
        cmd = module.jsonify(cmd)
        rc, out, err = exec_command(module, cmd)
        if check_rc and rc != 0:
            module.fail_json(msg=to_text(err, errors='surrogate_then_replace'), rc=rc)
        responses.append(sanitize(to_text(out, errors='surrogate_then_replace')))
    return responses


def load_config(module, commands):

    rc, out, err = exec_command(module, 'config')
    if rc != 0:
        module.fail_json(msg='unable to enter configuration mode', err=to_text(out, errors='surrogate_then_replace'))

    for command in to_list(commands):
        if command == 'end':
            continue
        rc, out, err = exec_command(module, command)
        if rc != 0:
            module.fail_json(msg=to_text(err, errors='surrogate_then_replace'), command=command, rc=rc)

    exec_command(module, 'end')
