"""
The networking module for SUSE based distros

.. versionadded:: 3005

"""

import logging
import os

import jinja2
import jinja2.exceptions
import salt.utils.files
import salt.utils.stringutils
import salt.utils.templates
import salt.utils.validate.net
from salt.exceptions import CommandExecutionError

# Set up logging
log = logging.getLogger(__name__)

# Set up template environment
JINJA = jinja2.Environment(
    loader=jinja2.FileSystemLoader(
        os.path.join(salt.utils.templates.TEMPLATE_DIRNAME, "suse_ip")
    )
)

# Define the module's virtual name
__virtualname__ = "ip"

# Default values for bonding
_BOND_DEFAULTS = {
    # 803.ad aggregation selection logic
    # 0 for stable (default)
    # 1 for bandwidth
    # 2 for count
    "ad_select": "0",
    # Max number of transmit queues (default = 16)
    "tx_queues": "16",
    # lacp_rate 0: Slow - every 30 seconds
    # lacp_rate 1: Fast - every 1 second
    "lacp_rate": "0",
    # Max bonds for this driver
    "max_bonds": "1",
    # Used with miimon.
    # On: driver sends mii
    # Off: ethtool sends mii
    "use_carrier": "0",
    # Default. Don't change unless you know what you are doing.
    "xmit_hash_policy": "layer2",
}
_SUSE_NETWORK_SCRIPT_DIR = "/etc/sysconfig/network"
_SUSE_NETWORK_FILE = "/etc/sysconfig/network/config"
_SUSE_NETWORK_ROUTES_FILE = "/etc/sysconfig/network/routes"
_CONFIG_TRUE = ("yes", "on", "true", "1", True)
_CONFIG_FALSE = ("no", "off", "false", "0", False)
_IFACE_TYPES = (
    "eth",
    "bond",
    "alias",
    "clone",
    "ipsec",
    "dialup",
    "bridge",
    "slave",
    "vlan",
    "ipip",
    "ib",
)


def __virtual__():
    """
    Confine this module to SUSE based distros
    """
    if __grains__["os_family"] == "Suse":
        return __virtualname__
    return (
        False,
        "The suse_ip execution module cannot be loaded: "
        "this module is only available on SUSE based distributions.",
    )


def _error_msg_iface(iface, option, expected):
    """
    Build an appropriate error message from a given option and
    a list of expected values.
    """
    if isinstance(expected, str):
        expected = (expected,)
    msg = "Invalid option -- Interface: {}, Option: {}, Expected: [{}]"
    return msg.format(iface, option, "|".join(str(e) for e in expected))


def _error_msg_routes(iface, option, expected):
    """
    Build an appropriate error message from a given option and
    a list of expected values.
    """
    msg = "Invalid option -- Route interface: {}, Option: {}, Expected: [{}]"
    return msg.format(iface, option, expected)


def _log_default_iface(iface, opt, value):
    log.info(
        "Using default option -- Interface: %s Option: %s Value: %s", iface, opt, value
    )


def _error_msg_network(option, expected):
    """
    Build an appropriate error message from a given option and
    a list of expected values.
    """
    if isinstance(expected, str):
        expected = (expected,)
    msg = "Invalid network setting -- Setting: {}, Expected: [{}]"
    return msg.format(option, "|".join(str(e) for e in expected))


def _log_default_network(opt, value):
    log.info("Using existing setting -- Setting: %s Value: %s", opt, value)


def _parse_suse_config(path):
    suse_config = _read_file(path)
    cv_suse_config = {}
    if suse_config:
        for line in suse_config:
            line = line.strip()
            if not line or line.startswith("!") or line.startswith("#"):
                continue
            pair = [p.rstrip() for p in line.split("=", 1)]
            if len(pair) != 2:
                continue
            name, value = pair
            cv_suse_config[name.upper()] = salt.utils.stringutils.dequote(value)

    return cv_suse_config


def _parse_ethtool_opts(opts, iface):
    """
    Parses valid options for ETHTOOL_OPTIONS of the interface
    Logs the error and raises AttributeError in case of getting invalid options
    """
    config = {}

    if "autoneg" in opts:
        if opts["autoneg"] in _CONFIG_TRUE:
            config.update({"autoneg": "on"})
        elif opts["autoneg"] in _CONFIG_FALSE:
            config.update({"autoneg": "off"})
        else:
            _raise_error_iface(iface, "autoneg", _CONFIG_TRUE + _CONFIG_FALSE)

    if "duplex" in opts:
        valid = ["full", "half"]
        if opts["duplex"] in valid:
            config.update({"duplex": opts["duplex"]})
        else:
            _raise_error_iface(iface, "duplex", valid)

    if "speed" in opts:
        valid = ["10", "100", "1000", "10000"]
        if str(opts["speed"]) in valid:
            config.update({"speed": opts["speed"]})
        else:
            _raise_error_iface(iface, opts["speed"], valid)

    if "advertise" in opts:
        valid = [
            "0x001",
            "0x002",
            "0x004",
            "0x008",
            "0x010",
            "0x020",
            "0x20000",
            "0x8000",
            "0x1000",
            "0x40000",
            "0x80000",
            "0x200000",
            "0x400000",
            "0x800000",
            "0x1000000",
            "0x2000000",
            "0x4000000",
        ]
        if str(opts["advertise"]) in valid:
            config.update({"advertise": opts["advertise"]})
        else:
            _raise_error_iface(iface, "advertise", valid)

    if "channels" in opts:
        channels_cmd = "-L {}".format(iface.strip())
        channels_params = []
        for option in ("rx", "tx", "other", "combined"):
            if option in opts["channels"]:
                valid = range(1, __grains__["num_cpus"] + 1)
                if opts["channels"][option] in valid:
                    channels_params.append(
                        "{} {}".format(option, opts["channels"][option])
                    )
                else:
                    _raise_error_iface(iface, opts["channels"][option], valid)
        if channels_params:
            config.update({channels_cmd: " ".join(channels_params)})

    valid = _CONFIG_TRUE + _CONFIG_FALSE
    for option in ("rx", "tx", "sg", "tso", "ufo", "gso", "gro", "lro"):
        if option in opts:
            if opts[option] in _CONFIG_TRUE:
                config.update({option: "on"})
            elif opts[option] in _CONFIG_FALSE:
                config.update({option: "off"})
            else:
                _raise_error_iface(iface, option, valid)

    return config


def _parse_settings_bond(opts, iface):
    """
    Parses valid options for bonding interface
    Logs the error and raises AttributeError in case of getting invalid options
    """
    if opts["mode"] in ("balance-rr", "0"):
        log.info("Device: %s Bonding Mode: load balancing (round-robin)", iface)
        return _parse_settings_bond_0(opts, iface)
    elif opts["mode"] in ("active-backup", "1"):
        log.info("Device: %s Bonding Mode: fault-tolerance (active-backup)", iface)
        return _parse_settings_bond_1(opts, iface)
    elif opts["mode"] in ("balance-xor", "2"):
        log.info("Device: %s Bonding Mode: load balancing (xor)", iface)
        return _parse_settings_bond_2(opts, iface)
    elif opts["mode"] in ("broadcast", "3"):
        log.info("Device: %s Bonding Mode: fault-tolerance (broadcast)", iface)
        return _parse_settings_bond_3(opts, iface)
    elif opts["mode"] in ("802.3ad", "4"):
        log.info(
            "Device: %s Bonding Mode: IEEE 802.3ad Dynamic link aggregation", iface
        )
        return _parse_settings_bond_4(opts, iface)
    elif opts["mode"] in ("balance-tlb", "5"):
        log.info("Device: %s Bonding Mode: transmit load balancing", iface)
        return _parse_settings_bond_5(opts, iface)
    elif opts["mode"] in ("balance-alb", "6"):
        log.info("Device: %s Bonding Mode: adaptive load balancing", iface)
        return _parse_settings_bond_6(opts, iface)
    else:
        valid = (
            "0",
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "balance-rr",
            "active-backup",
            "balance-xor",
            "broadcast",
            "802.3ad",
            "balance-tlb",
            "balance-alb",
        )
        _raise_error_iface(iface, "mode", valid)


def _parse_settings_miimon(opts, iface):
    """
    Add shared settings for miimon support used by balance-rr, balance-xor
    bonding types.
    """
    ret = {}
    for binding in ("miimon", "downdelay", "updelay"):
        if binding in opts:
            try:
                int(opts[binding])
                ret.update({binding: opts[binding]})
            except ValueError:
                _raise_error_iface(iface, binding, "integer")

    if "miimon" in opts and "downdelay" not in opts:
        ret["downdelay"] = ret["miimon"] * 2

    if "miimon" in opts:
        if not opts["miimon"]:
            _raise_error_iface(iface, "miimon", "nonzero integer")

        for binding in ("downdelay", "updelay"):
            if binding in ret:
                if ret[binding] % ret["miimon"]:
                    _raise_error_iface(
                        iface,
                        binding,
                        "0 or a multiple of miimon ({})".format(ret["miimon"]),
                    )

        if "use_carrier" in opts:
            if opts["use_carrier"] in _CONFIG_TRUE:
                ret.update({"use_carrier": "1"})
            elif opts["use_carrier"] in _CONFIG_FALSE:
                ret.update({"use_carrier": "0"})
            else:
                valid = _CONFIG_TRUE + _CONFIG_FALSE
                _raise_error_iface(iface, "use_carrier", valid)
        else:
            _log_default_iface(iface, "use_carrier", _BOND_DEFAULTS["use_carrier"])
            ret.update({"use_carrier": _BOND_DEFAULTS["use_carrier"]})

    return ret


def _parse_settings_arp(opts, iface):
    """
    Add shared settings for arp used by balance-rr, balance-xor bonding types.
    """
    ret = {}
    if "arp_interval" in opts:
        try:
            int(opts["arp_interval"])
            ret.update({"arp_interval": opts["arp_interval"]})
        except ValueError:
            _raise_error_iface(iface, "arp_interval", "integer")

        # ARP targets in n.n.n.n form
        valid = "list of ips (up to 16)"
        if "arp_ip_target" in opts:
            if isinstance(opts["arp_ip_target"], list):
                if 1 <= len(opts["arp_ip_target"]) <= 16:
                    ret.update({"arp_ip_target": ",".join(opts["arp_ip_target"])})
                else:
                    _raise_error_iface(iface, "arp_ip_target", valid)
            else:
                _raise_error_iface(iface, "arp_ip_target", valid)
        else:
            _raise_error_iface(iface, "arp_ip_target", valid)

    return ret


def _parse_settings_bond_0(opts, iface):
    """
    Parses valid options for balance-rr (type 0) bonding interface
    Logs the error and raises AttributeError in case of getting invalid options
    """
    bond = {"mode": "0"}
    bond.update(_parse_settings_miimon(opts, iface))
    bond.update(_parse_settings_arp(opts, iface))

    if "miimon" not in opts and "arp_interval" not in opts:
        _raise_error_iface(
            iface, "miimon or arp_interval", "at least one of these is required"
        )

    return bond


def _parse_settings_bond_1(opts, iface):
    """
    Parses valid options for active-backup (type 1) bonding interface
    Logs the error and raises AttributeError in case of getting invalid options
    """
    bond = {"mode": "1"}
    bond.update(_parse_settings_miimon(opts, iface))

    if "miimon" not in opts:
        _raise_error_iface(iface, "miimon", "integer")

    if "primary" in opts:
        bond.update({"primary": opts["primary"]})

    return bond


def _parse_settings_bond_2(opts, iface):
    """
    Parses valid options for balance-xor (type 2) bonding interface
    Logs the error and raises AttributeError in case of getting invalid options
    """
    bond = {"mode": "2"}
    bond.update(_parse_settings_miimon(opts, iface))
    bond.update(_parse_settings_arp(opts, iface))

    if "miimon" not in opts and "arp_interval" not in opts:
        _raise_error_iface(
            iface, "miimon or arp_interval", "at least one of these is required"
        )

    if "hashing-algorithm" in opts:
        valid = ("layer2", "layer2+3", "layer3+4")
        if opts["hashing-algorithm"] in valid:
            bond.update({"xmit_hash_policy": opts["hashing-algorithm"]})
        else:
            _raise_error_iface(iface, "hashing-algorithm", valid)

    return bond


def _parse_settings_bond_3(opts, iface):
    """
    Parses valid options for broadcast (type 3) bonding interface
    Logs the error and raises AttributeError in case of getting invalid options
    """
    bond = {"mode": "3"}
    bond.update(_parse_settings_miimon(opts, iface))

    if "miimon" not in opts:
        _raise_error_iface(iface, "miimon", "integer")

    return bond


def _parse_settings_bond_4(opts, iface):
    """
    Parses valid options for 802.3ad (type 4) bonding interface
    Logs the error and raises AttributeError in case of getting invalid options
    """
    bond = {"mode": "4"}
    bond.update(_parse_settings_miimon(opts, iface))

    if "miimon" not in opts:
        _raise_error_iface(iface, "miimon", "integer")

    for binding in ("lacp_rate", "ad_select"):
        if binding in opts:
            if binding == "lacp_rate":
                valid = ("fast", "1", "slow", "0")
                if opts[binding] not in valid:
                    _raise_error_iface(iface, binding, valid)
                if opts[binding] == "fast":
                    opts.update({binding: "1"})
                if opts[binding] == "slow":
                    opts.update({binding: "0"})
            else:
                valid = "integer"
            try:
                int(opts[binding])
                bond.update({binding: opts[binding]})
            except ValueError:
                _raise_error_iface(iface, binding, valid)
        else:
            _log_default_iface(iface, binding, _BOND_DEFAULTS[binding])
            bond.update({binding: _BOND_DEFAULTS[binding]})

    if "hashing-algorithm" in opts:
        valid = ("layer2", "layer2+3", "layer3+4")
        if opts["hashing-algorithm"] in valid:
            bond.update({"xmit_hash_policy": opts["hashing-algorithm"]})
        else:
            _raise_error_iface(iface, "hashing-algorithm", valid)

    return bond


def _parse_settings_bond_5(opts, iface):
    """
    Parses valid options for balance-tlb (type 5) bonding interface
    Logs the error and raises AttributeError in case of getting invalid options
    """
    bond = {"mode": "5"}
    bond.update(_parse_settings_miimon(opts, iface))

    if "miimon" not in opts:
        _raise_error_iface(iface, "miimon", "integer")

    if "primary" in opts:
        bond.update({"primary": opts["primary"]})

    return bond


def _parse_settings_bond_6(opts, iface):
    """
    Parses valid options for balance-alb (type 6) bonding interface
    Logs the error and raises AttributeError in case of getting invalid options
    """
    bond = {"mode": "6"}
    bond.update(_parse_settings_miimon(opts, iface))

    if "miimon" not in opts:
        _raise_error_iface(iface, "miimon", "integer")

    if "primary" in opts:
        bond.update({"primary": opts["primary"]})

    return bond


def _parse_settings_vlan(opts, iface):
    """
    Filters given options and outputs valid settings for a vlan
    """
    vlan = {}
    if "reorder_hdr" in opts:
        if opts["reorder_hdr"] in _CONFIG_TRUE + _CONFIG_FALSE:
            vlan.update({"reorder_hdr": opts["reorder_hdr"]})
        else:
            valid = _CONFIG_TRUE + _CONFIG_FALSE
            _raise_error_iface(iface, "reorder_hdr", valid)

    if "vlan_id" in opts:
        if opts["vlan_id"] > 0:
            vlan.update({"vlan_id": opts["vlan_id"]})
        else:
            _raise_error_iface(iface, "vlan_id", "Positive integer")

    if "phys_dev" in opts:
        if len(opts["phys_dev"]) > 0:
            vlan.update({"phys_dev": opts["phys_dev"]})
        else:
            _raise_error_iface(iface, "phys_dev", "Non-empty string")

    return vlan


def _parse_settings_eth(opts, iface_type, enabled, iface):
    """
    Filters given options and outputs valid settings for a
    network interface.
    """
    result = {"name": iface}
    if "proto" in opts:
        valid = [
            "static",
            "dhcp",
            "dhcp4",
            "dhcp6",
            "autoip",
            "dhcp+autoip",
            "auto6",
            "6to4",
            "none",
        ]
        if opts["proto"] in valid:
            result["proto"] = opts["proto"]
        else:
            _raise_error_iface(iface, opts["proto"], valid)

    if "mtu" in opts:
        try:
            result["mtu"] = int(opts["mtu"])
        except ValueError:
            _raise_error_iface(iface, "mtu", ["integer"])

    if "hwaddr" in opts and "macaddr" in opts:
        msg = "Cannot pass both hwaddr and macaddr. Must use either hwaddr or macaddr"
        log.error(msg)
        raise AttributeError(msg)

    if iface_type not in ("bridge",):
        ethtool = _parse_ethtool_opts(opts, iface)
        if ethtool:
            result["ethtool"] = " ".join(
                ["{} {}".format(x, y) for x, y in ethtool.items()]
            )

    if iface_type == "slave":
        result["proto"] = "none"

    if iface_type == "bond":
        if "mode" not in opts:
            msg = "Missing required option 'mode'"
            log.error("%s for bond interface '%s'", msg, iface)
            raise AttributeError(msg)
        bonding = _parse_settings_bond(opts, iface)
        if bonding:
            result["bonding"] = " ".join(
                ["{}={}".format(x, y) for x, y in bonding.items()]
            )
            result["devtype"] = "Bond"
            if "slaves" in opts:
                if isinstance(opts["slaves"], list):
                    result["slaves"] = opts["slaves"]
                else:
                    result["slaves"] = opts["slaves"].split()

    if iface_type == "vlan":
        vlan = _parse_settings_vlan(opts, iface)
        if vlan:
            result["devtype"] = "Vlan"
            for opt in vlan:
                result[opt] = opts[opt]

    if iface_type == "eth":
        result["devtype"] = "Ethernet"

    if iface_type == "bridge":
        result["devtype"] = "Bridge"
        bypassfirewall = True
        valid = _CONFIG_TRUE + _CONFIG_FALSE
        for opt in ("bypassfirewall",):
            if opt in opts:
                if opts[opt] in _CONFIG_TRUE:
                    bypassfirewall = True
                elif opts[opt] in _CONFIG_FALSE:
                    bypassfirewall = False
                else:
                    _raise_error_iface(iface, opts[opt], valid)

        bridgectls = [
            "net.bridge.bridge-nf-call-ip6tables",
            "net.bridge.bridge-nf-call-iptables",
            "net.bridge.bridge-nf-call-arptables",
        ]

        if bypassfirewall:
            sysctl_value = 0
        else:
            sysctl_value = 1

        for sysctl in bridgectls:
            try:
                __salt__["sysctl.persist"](sysctl, sysctl_value)
            except CommandExecutionError:
                log.warning("Failed to set sysctl: %s", sysctl)

    else:
        if "bridge" in opts:
            result["bridge"] = opts["bridge"]

    if iface_type == "ipip":
        result["devtype"] = "IPIP"
        for opt in ("my_inner_ipaddr", "my_outer_ipaddr"):
            if opt not in opts:
                _raise_error_iface(iface, opt, "1.2.3.4")
            else:
                result[opt] = opts[opt]
    if iface_type == "ib":
        result["devtype"] = "InfiniBand"

    if "prefix" in opts:
        if "netmask" in opts:
            msg = "Cannot use prefix and netmask together"
            log.error(msg)
            raise AttributeError(msg)
        result["prefix"] = opts["prefix"]
    elif "netmask" in opts:
        result["netmask"] = opts["netmask"]

    for opt in (
        "ipaddr",
        "master",
        "srcaddr",
        "delay",
        "domain",
        "gateway",
        "uuid",
        "nickname",
        "zone",
    ):
        if opt in opts:
            result[opt] = opts[opt]

    if "ipaddrs" in opts or "ipv6addr" in opts or "ipv6addrs" in opts:
        result["ipaddrs"] = []
    if "ipaddrs" in opts:
        for opt in opts["ipaddrs"]:
            if salt.utils.validate.net.ipv4_addr(
                opt
            ) or salt.utils.validate.net.ipv6_addr(opt):
                result["ipaddrs"].append(opt)
            else:
                msg = "{} is invalid ipv4 or ipv6 CIDR".format(opt)
                log.error(msg)
                raise AttributeError(msg)
    if "ipv6addr" in opts:
        if salt.utils.validate.net.ipv6_addr(opts["ipv6addr"]):
            result["ipaddrs"].append(opts["ipv6addr"])
        else:
            msg = "{} is invalid ipv6 CIDR".format(opt)
            log.error(msg)
            raise AttributeError(msg)
    if "ipv6addrs" in opts:
        for opt in opts["ipv6addrs"]:
            if salt.utils.validate.net.ipv6_addr(opt):
                result["ipaddrs"].append(opt)
            else:
                msg = "{} is invalid ipv6 CIDR".format(opt)
                log.error(msg)
                raise AttributeError(msg)

    if "enable_ipv6" in opts:
        result["enable_ipv6"] = opts["enable_ipv6"]

    valid = _CONFIG_TRUE + _CONFIG_FALSE
    for opt in (
        "onparent",
        "peerdns",
        "peerroutes",
        "slave",
        "vlan",
        "defroute",
        "stp",
        "ipv6_peerdns",
        "ipv6_defroute",
        "ipv6_peerroutes",
        "ipv6_autoconf",
        "ipv4_failure_fatal",
        "dhcpv6c",
    ):
        if opt in opts:
            if opts[opt] in _CONFIG_TRUE:
                result[opt] = "yes"
            elif opts[opt] in _CONFIG_FALSE:
                result[opt] = "no"
            else:
                _raise_error_iface(iface, opts[opt], valid)

    if "onboot" in opts:
        log.warning(
            "The 'onboot' option is controlled by the 'enabled' option. "
            "Interface: %s Enabled: %s",
            iface,
            enabled,
        )

    if "startmode" in opts:
        valid = ("manual", "auto", "nfsroot", "hotplug", "off")
        if opts["startmode"] in valid:
            result["startmode"] = opts["startmode"]
        else:
            _raise_error_iface(iface, opts["startmode"], valid)
    else:
        if enabled:
            result["startmode"] = "auto"
        else:
            result["startmode"] = "off"

    # This vlan is in opts, and should be only used in range interface
    # will affect jinja template for interface generating
    if "vlan" in opts:
        if opts["vlan"] in _CONFIG_TRUE:
            result["vlan"] = "yes"
        elif opts["vlan"] in _CONFIG_FALSE:
            result["vlan"] = "no"
        else:
            _raise_error_iface(iface, opts["vlan"], valid)

    if "arpcheck" in opts:
        if opts["arpcheck"] in _CONFIG_FALSE:
            result["arpcheck"] = "no"

    if "ipaddr_start" in opts:
        result["ipaddr_start"] = opts["ipaddr_start"]

    if "ipaddr_end" in opts:
        result["ipaddr_end"] = opts["ipaddr_end"]

    if "clonenum_start" in opts:
        result["clonenum_start"] = opts["clonenum_start"]

    if "hwaddr" in opts:
        result["hwaddr"] = opts["hwaddr"]

    if "macaddr" in opts:
        result["macaddr"] = opts["macaddr"]

    # If NetworkManager is available, we can control whether we use
    # it or not
    if "nm_controlled" in opts:
        if opts["nm_controlled"] in _CONFIG_TRUE:
            result["nm_controlled"] = "yes"
        elif opts["nm_controlled"] in _CONFIG_FALSE:
            result["nm_controlled"] = "no"
        else:
            _raise_error_iface(iface, opts["nm_controlled"], valid)
    else:
        result["nm_controlled"] = "no"

    return result


def _parse_routes(iface, opts):
    """
    Filters given options and outputs valid settings for
    the route settings file.
    """
    # Normalize keys
    opts = {k.lower(): v for (k, v) in opts.items()}
    result = {}
    if "routes" not in opts:
        _raise_error_routes(iface, "routes", "List of routes")

    for opt in opts:
        result[opt] = opts[opt]

    return result


def _parse_network_settings(opts, current):
    """
    Filters given options and outputs valid settings for
    the global network settings file.
    """
    # Normalize keys
    opts = {k.lower(): v for (k, v) in opts.items()}
    current = {k.lower(): v for (k, v) in current.items()}

    # Check for supported parameters
    retain_settings = opts.get("retain_settings", False)
    result = {}
    if retain_settings:
        for opt in current:
            nopt = opt
            if opt == "netconfig_dns_static_servers":
                nopt = "dns"
                result[nopt] = current[opt].split()
            elif opt == "netconfig_dns_static_searchlist":
                nopt = "dns_search"
                result[nopt] = current[opt].split()
            elif opt.startswith("netconfig_") and opt not in (
                "netconfig_modules_order",
                "netconfig_verbose",
                "netconfig_force_replace",
            ):
                nopt = opt[10:]
                result[nopt] = current[opt]
            else:
                result[nopt] = current[opt]
            _log_default_network(nopt, current[opt])

    for opt in opts:
        if opt in ("dns", "dns_search") and not isinstance(opts[opt], list):
            result[opt] = opts[opt].split()
        else:
            result[opt] = opts[opt]
    return result


def _raise_error_iface(iface, option, expected):
    """
    Log and raise an error with a logical formatted message.
    """
    msg = _error_msg_iface(iface, option, expected)
    log.error(msg)
    raise AttributeError(msg)


def _raise_error_network(option, expected):
    """
    Log and raise an error with a logical formatted message.
    """
    msg = _error_msg_network(option, expected)
    log.error(msg)
    raise AttributeError(msg)


def _raise_error_routes(iface, option, expected):
    """
    Log and raise an error with a logical formatted message.
    """
    msg = _error_msg_routes(iface, option, expected)
    log.error(msg)
    raise AttributeError(msg)


def _read_file(path):
    """
    Reads and returns the contents of a file
    """
    try:
        with salt.utils.files.fopen(path, "rb") as rfh:
            return _get_non_blank_lines(salt.utils.stringutils.to_unicode(rfh.read()))
    except OSError:
        return []  # Return empty list for type consistency


def _write_file_iface(iface, data, folder, pattern):
    """
    Writes a file to disk
    """
    filename = os.path.join(folder, pattern.format(iface))
    if not os.path.exists(folder):
        msg = "{} cannot be written. {} does not exist".format(filename, folder)
        log.error(msg)
        raise AttributeError(msg)
    with salt.utils.files.fopen(filename, "w") as fp_:
        fp_.write(salt.utils.stringutils.to_str(data))


def _write_file_network(data, filename):
    """
    Writes a file to disk
    """
    with salt.utils.files.fopen(filename, "w") as fp_:
        fp_.write(salt.utils.stringutils.to_str(data))


def _get_non_blank_lines(data):
    lines = data.splitlines()
    try:  # Discard newlines if they exist
        lines.remove("")
    except ValueError:
        pass
    return lines


def build_interface(iface, iface_type, enabled, **settings):
    """
    Build an interface script for a network interface.

    Args:
        :param iface:
            The name of the interface to build the configuration for

        :param iface_type:
            The type of the interface. The following types are possible:
              - eth
              - bond
              - alias
              - clone
              - ipsec
              - dialup
              - bridge
              - slave
              - vlan
              - ipip
              - ib

        :param enabled:
            Build the interface enabled or disabled

        :param settings:
            The settings for the interface

    Returns:
        dict: A dictionary of file/content

    CLI Example:

    .. code-block:: bash

        salt '*' ip.build_interface eth0 eth <settings>
    """
    iface_type = iface_type.lower()

    if iface_type not in _IFACE_TYPES:
        _raise_error_iface(iface, iface_type, _IFACE_TYPES)

    if iface_type == "slave":
        settings["slave"] = "yes"
        if "master" not in settings:
            msg = "master is a required setting for slave interfaces"
            log.error(msg)
            raise AttributeError(msg)

    if iface_type == "bond":
        if "mode" not in settings:
            msg = "mode is required for bond interfaces"
            log.error(msg)
            raise AttributeError(msg)
        settings["mode"] = str(settings["mode"])

    if iface_type == "vlan":
        settings["vlan"] = "yes"

    if iface_type == "bridge" and not __salt__["pkg.version"]("bridge-utils"):
        __salt__["pkg.install"]("bridge-utils")

    if iface_type in (
        "eth",
        "bond",
        "bridge",
        "slave",
        "vlan",
        "ipip",
        "ib",
        "alias",
    ):
        opts = _parse_settings_eth(settings, iface_type, enabled, iface)
        try:
            template = JINJA.get_template("ifcfg.jinja")
        except jinja2.exceptions.TemplateNotFound:
            log.error("Could not load template ifcfg.jinja")
            return ""
        log.debug("Interface opts:\n%s", opts)
        ifcfg = template.render(opts)

    if settings.get("test"):
        return _get_non_blank_lines(ifcfg)

    _write_file_iface(iface, ifcfg, _SUSE_NETWORK_SCRIPT_DIR, "ifcfg-{}")
    path = os.path.join(_SUSE_NETWORK_SCRIPT_DIR, "ifcfg-{}".format(iface))

    return _read_file(path)


def build_routes(iface, **settings):
    """
    Build a route script for a network interface.

    Args:
        :param iface:
            The name of the interface to build the routes for

        :param settings:
            The settings for the routes

    Returns:
        dict: A dictionary of file/content

    CLI Example:

    .. code-block:: bash

        salt '*' ip.build_routes eth0 <settings>
    """

    template = "ifroute.jinja"
    log.debug("Template name: %s", template)

    opts = _parse_routes(iface, settings)
    log.debug("Opts:\n%s", opts)
    try:
        template = JINJA.get_template(template)
    except jinja2.exceptions.TemplateNotFound:
        log.error("Could not load template %s", template)
        return ""
    log.debug("IP routes:\n%s", opts["routes"])

    if iface == "routes":
        routecfg = template.render(routes=opts["routes"])
    else:
        routecfg = template.render(routes=opts["routes"], iface=iface)

    if settings["test"]:
        return _get_non_blank_lines(routecfg)

    if iface == "routes":
        path = _SUSE_NETWORK_ROUTES_FILE
    else:
        path = os.path.join(_SUSE_NETWORK_SCRIPT_DIR, "ifroute-{}".format(iface))

    _write_file_network(routecfg, path)

    return _read_file(path)


def down(iface, iface_type=None):
    """
    Shutdown a network interface

    Args:
        :param iface:
            The name of the interface to shutdown

        :param iface_type:
            The type of the interface
            If ``slave`` is specified, no any action is performing
            Default is ``None``

    Returns:
        str: The result of ``ifdown`` command or ``None`` if ``slave``
        iface_type was specified

    CLI Example:

    .. code-block:: bash

        salt '*' ip.down eth0
    """
    # Slave devices are controlled by the master.
    if not iface_type or iface_type.lower() != "slave":
        return __salt__["cmd.run"]("ifdown {}".format(iface))
    return None


def get_interface(iface):
    """
    Return the contents of an interface script

    Args:
        :param iface:
            The name of the interface to get settings for

    Returns:
        dict: A dictionary of file/content

    CLI Example:

    .. code-block:: bash

        salt '*' ip.get_interface eth0
    """
    path = os.path.join(_SUSE_NETWORK_SCRIPT_DIR, "ifcfg-{}".format(iface))
    return _read_file(path)


def up(iface, iface_type=None):
    """
    Start up a network interface

    Args:
        :param iface:
            The name of the interface to start up

        :param iface_type:
            The type of the interface
            If ``slave`` is specified, no any action is performing
            Default is ``None``

    Returns:
        str: The result of ``ifup`` command or ``None`` if ``slave``
        iface_type was specified

    CLI Example:

    .. code-block:: bash

        salt '*' ip.up eth0
    """
    # Slave devices are controlled by the master.
    if not iface_type or iface_type.lower() != "slave":
        return __salt__["cmd.run"]("ifup {}".format(iface))
    return None


def get_routes(iface):
    """
    Return the contents of the interface routes script.

    Args:
        :param iface:
            The name of the interface to get the routes for

    Returns:
        dict: A dictionary of file/content

    CLI Example:

    .. code-block:: bash

        salt '*' ip.get_routes eth0
    """
    if iface == "routes":
        path = _SUSE_NETWORK_ROUTES_FILE
    else:
        path = os.path.join(_SUSE_NETWORK_SCRIPT_DIR, "ifroute-{}".format(iface))
    return _read_file(path)


def get_network_settings():
    """
    Return the contents of the global network script.

    Args:
        :param iface:
            The name of the interface to start up

        :param iface_type:
            The type of the interface
            If ``slave`` is specified, no any action is performing
            Default is ``None``

    Returns:
        dict: A dictionary of file/content

    CLI Example:

    .. code-block:: bash

        salt '*' ip.get_network_settings
    """
    return _read_file(_SUSE_NETWORK_FILE)


def apply_network_settings(**settings):
    """
    Apply global network configuration.

    Args:
        :param settings:
            The network settings to apply

    Returns:
        The result of ``service.reload`` for ``network`` service

    CLI Example:

    .. code-block:: bash

        salt '*' ip.apply_network_settings
    """
    if "require_reboot" not in settings:
        settings["require_reboot"] = False

    if "apply_hostname" not in settings:
        settings["apply_hostname"] = False

    hostname_res = True
    if settings["apply_hostname"] in _CONFIG_TRUE:
        if "hostname" in settings:
            hostname_res = __salt__["network.mod_hostname"](settings["hostname"])
        else:
            log.warning(
                "The network state sls is trying to apply hostname "
                "changes but no hostname is defined."
            )
            hostname_res = False

    res = True
    if settings["require_reboot"] in _CONFIG_TRUE:
        log.warning(
            "The network state sls is requiring a reboot of the system to "
            "properly apply network configuration."
        )
        res = True
    else:
        res = __salt__["service.reload"]("network")

    return hostname_res and res


def build_network_settings(**settings):
    """
    Build the global network script.

    Args:
        :param settings:
            The network settings

    Returns:
        dict: A dictionary of file/content

    CLI Example:

    .. code-block:: bash

        salt '*' ip.build_network_settings <settings>
    """
    # Read current configuration and store default values
    current_network_settings = _parse_suse_config(_SUSE_NETWORK_FILE)

    # Build settings
    opts = _parse_network_settings(settings, current_network_settings)
    try:
        template = JINJA.get_template("network.jinja")
    except jinja2.exceptions.TemplateNotFound:
        log.error("Could not load template network.jinja")
        return ""
    network = template.render(opts)

    if settings["test"]:
        return _get_non_blank_lines(network)

    # Write settings
    _write_file_network(network, _SUSE_NETWORK_FILE)

    __salt__["cmd.run"]("netconfig update -f")

    return _read_file(_SUSE_NETWORK_FILE)
