# 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.
# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# 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 __future__ import absolute_import, division, print_function

__metaclass__ = type
import json

from ansible.module_utils._text import to_text
from ansible.module_utils.basic import env_fallback
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.utils import (
    to_list,
)
from ansible.module_utils.connection import Connection, ConnectionError

_DEVICE_CONFIGS = {}

ios_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"
    ),
    "authorize": dict(
        fallback=(env_fallback, ["ANSIBLE_NET_AUTHORIZE"]), type="bool"
    ),
    "auth_pass": dict(
        fallback=(env_fallback, ["ANSIBLE_NET_AUTH_PASS"]), no_log=True
    ),
    "timeout": dict(type="int"),
}
ios_argument_spec = {
    "provider": dict(
        type="dict", options=ios_provider_spec, removed_in_version=2.14
    )
}


def get_provider_argspec():
    return ios_provider_spec


def get_connection(module):
    if hasattr(module, "_ios_connection"):
        return module._ios_connection

    capabilities = get_capabilities(module)
    network_api = capabilities.get("network_api")
    if network_api == "cliconf":
        module._ios_connection = Connection(module._socket_path)
    else:
        module.fail_json(msg="Invalid connection type %s" % network_api)

    return module._ios_connection


def get_capabilities(module):
    if hasattr(module, "_ios_capabilities"):
        return module._ios_capabilities
    try:
        capabilities = Connection(module._socket_path).get_capabilities()
    except ConnectionError as exc:
        module.fail_json(msg=to_text(exc, errors="surrogate_then_replace"))
    module._ios_capabilities = json.loads(capabilities)
    return module._ios_capabilities


def get_defaults_flag(module):
    connection = get_connection(module)
    try:
        out = connection.get_defaults_flag()
    except ConnectionError as exc:
        module.fail_json(msg=to_text(exc, errors="surrogate_then_replace"))
    return to_text(out, errors="surrogate_then_replace").strip()


def get_config(module, flags=None):
    flags = to_list(flags)

    section_filter = False
    if flags and "section" in flags[-1]:
        section_filter = True

    flag_str = " ".join(flags)

    try:
        return _DEVICE_CONFIGS[flag_str]
    except KeyError:
        connection = get_connection(module)
        try:
            out = connection.get_config(flags=flags)
        except ConnectionError as exc:
            if section_filter:
                # Some ios devices don't understand `| section foo`
                out = get_config(module, flags=flags[:-1])
            else:
                module.fail_json(
                    msg=to_text(exc, errors="surrogate_then_replace")
                )
        cfg = to_text(out, errors="surrogate_then_replace").strip()
        _DEVICE_CONFIGS[flag_str] = cfg
        return cfg


def run_commands(module, commands, check_rc=True):
    connection = get_connection(module)
    try:
        return connection.run_commands(commands=commands, check_rc=check_rc)
    except ConnectionError as exc:
        module.fail_json(msg=to_text(exc))


def load_config(module, commands):
    connection = get_connection(module)

    try:
        resp = connection.edit_config(commands)
        return resp.get("response")
    except ConnectionError as exc:
        module.fail_json(msg=to_text(exc))


def normalize_interface(name):
    """Return the normalized interface name
    """
    if not name:
        return

    def _get_number(name):
        digits = ""
        for char in name:
            if char.isdigit() or char in "/.":
                digits += char
        return digits

    if name.lower().startswith("gi"):
        if_type = "GigabitEthernet"
    elif name.lower().startswith("te"):
        if_type = "TenGigabitEthernet"
    elif name.lower().startswith("fa"):
        if_type = "FastEthernet"
    elif name.lower().startswith("fo"):
        if_type = "FortyGigabitEthernet"
    elif name.lower().startswith("et"):
        if_type = "Ethernet"
    elif name.lower().startswith("vl"):
        if_type = "Vlan"
    elif name.lower().startswith("lo"):
        if_type = "loopback"
    elif name.lower().startswith("po"):
        if_type = "port-channel"
    elif name.lower().startswith("nv"):
        if_type = "nve"
    elif name.lower().startswith("twe"):
        if_type = "TwentyFiveGigE"
    elif name.lower().startswith("hu"):
        if_type = "HundredGigE"
    else:
        if_type = None

    number_list = name.split(" ")
    if len(number_list) == 2:
        if_number = number_list[-1].strip()
    else:
        if_number = _get_number(name)

    if if_type:
        proper_interface = if_type + if_number
    else:
        proper_interface = name

    return proper_interface
