"""
Management of Zabbix Valuemap object over Zabbix API.

.. versionadded:: 2017.7

:codeauthor: Jakub Sliva <jakub.sliva@ultimum.io>
"""

import json
import logging

from salt.exceptions import SaltException

log = logging.getLogger(__name__)


def __virtual__():
    """
    Only make these states available if Zabbix module and run_query function is available
    and all 3rd party modules imported.
    """
    if "zabbix.run_query" in __salt__:
        return True
    return False, "Import zabbix or other needed modules failed."


def present(name, params, **kwargs):
    """
    Creates Zabbix Value map object or if differs update it according defined parameters

    :param name: Zabbix Value map name
    :param params: Definition of the Zabbix Value map
    :param _connection_user: Optional - zabbix user (can also be set in opts or pillar, see module's docstring)
    :param _connection_password: Optional - zabbix password (can also be set in opts or pillar, see module's docstring)
    :param _connection_url: Optional - url of zabbix frontend (can also be set in opts, pillar, see module's docstring)

    .. code-block:: yaml

        zabbix-valuemap-present:
            zabbix_valuemap.present:
                - name: Number mapping
                - params:
                    mappings:
                        - value: 1
                          newvalue: one
                        - value: 2
                          newvalue: two
    """
    zabbix_id_mapper = __salt__["zabbix.get_zabbix_id_mapper"]()

    dry_run = __opts__["test"]
    ret = {"name": name, "result": False, "comment": "", "changes": {}}

    # Create input params substituting functions with their results
    params["name"] = name
    input_params = __salt__["zabbix.substitute_params"](params, **kwargs)
    log.info(
        "Zabbix Value map: input params: %s",
        str(json.dumps(input_params, indent=4)),
    )

    search = {"output": "extend", "selectMappings": "extend", "filter": {"name": name}}
    # GET Value map object if exists
    valuemap_get = __salt__["zabbix.run_query"]("valuemap.get", search, **kwargs)
    log.info(
        "Zabbix Value map: valuemap.get result: %s",
        str(json.dumps(valuemap_get, indent=4)),
    )

    existing_obj = (
        __salt__["zabbix.substitute_params"](valuemap_get[0], **kwargs)
        if valuemap_get and len(valuemap_get) == 1
        else False
    )

    if existing_obj:
        diff_params = __salt__["zabbix.compare_params"](input_params, existing_obj)
        log.info(
            "Zabbix Value map: input params: {%s",
            str(json.dumps(input_params, indent=4)),
        )
        log.info(
            "Zabbix Value map: Object comparison result. Differences: %s",
            str(diff_params),
        )

        if diff_params:
            diff_params[zabbix_id_mapper["valuemap"]] = existing_obj[
                zabbix_id_mapper["valuemap"]
            ]
            log.info(
                "Zabbix Value map: update params: %s",
                str(json.dumps(diff_params, indent=4)),
            )

            if dry_run:
                ret["result"] = True
                ret["comment"] = 'Zabbix Value map "{}" would be fixed.'.format(name)
                ret["changes"] = {
                    name: {
                        "old": (
                            'Zabbix Value map "{}" differs '
                            "in following parameters: {}".format(name, diff_params)
                        ),
                        "new": (
                            'Zabbix Value map "{}" would correspond to definition.'.format(
                                name
                            )
                        ),
                    }
                }
            else:
                valuemap_update = __salt__["zabbix.run_query"](
                    "valuemap.update", diff_params, **kwargs
                )
                log.info(
                    "Zabbix Value map: valuemap.update result: %s",
                    str(valuemap_update),
                )
                if valuemap_update:
                    ret["result"] = True
                    ret["comment"] = 'Zabbix Value map "{}" updated.'.format(name)
                    ret["changes"] = {
                        name: {
                            "old": (
                                'Zabbix Value map "{}" differed '
                                "in following parameters: {}".format(name, diff_params)
                            ),
                            "new": 'Zabbix Value map "{}" fixed.'.format(name),
                        }
                    }

        else:
            ret["result"] = True
            ret[
                "comment"
            ] = 'Zabbix Value map "{}" already exists and corresponds to a definition.'.format(
                name
            )

    else:
        if dry_run:
            ret["result"] = True
            ret["comment"] = 'Zabbix Value map "{}" would be created.'.format(name)
            ret["changes"] = {
                name: {
                    "old": 'Zabbix Value map "{}" does not exist.'.format(name),
                    "new": (
                        'Zabbix Value map "{}" would be created '
                        "according definition.".format(name)
                    ),
                }
            }
        else:
            # ACTION.CREATE
            valuemap_create = __salt__["zabbix.run_query"](
                "valuemap.create", input_params, **kwargs
            )
            log.info(
                "Zabbix Value map: valuemap.create result: %s",
                str(valuemap_create),
            )

            if valuemap_create:
                ret["result"] = True
                ret["comment"] = 'Zabbix Value map "{}" created.'.format(name)
                ret["changes"] = {
                    name: {
                        "old": 'Zabbix Value map "{}" did not exist.'.format(name),
                        "new": (
                            'Zabbix Value map "{}" created according definition.'.format(
                                name
                            )
                        ),
                    }
                }

    return ret


def absent(name, **kwargs):
    """
    Makes the Zabbix Value map to be absent (either does not exist or delete it).

    :param name: Zabbix Value map name
    :param _connection_user: Optional - zabbix user (can also be set in opts or pillar, see module's docstring)
    :param _connection_password: Optional - zabbix password (can also be set in opts or pillar, see module's docstring)
    :param _connection_url: Optional - url of zabbix frontend (can also be set in opts, pillar, see module's docstring)

    .. code-block:: yaml

        zabbix-valuemap-absent:
            zabbix_valuemap.absent:
                - name: Value map name
    """
    dry_run = __opts__["test"]
    ret = {"name": name, "result": False, "comment": "", "changes": {}}

    try:
        object_id = __salt__["zabbix.get_object_id_by_params"](
            "valuemap", {"filter": {"name": name}}, **kwargs
        )
    except SaltException:
        object_id = False

    if not object_id:
        ret["result"] = True
        ret["comment"] = 'Zabbix Value map "{}" does not exist.'.format(name)
    else:
        if dry_run:
            ret["result"] = True
            ret["comment"] = 'Zabbix Value map "{}" would be deleted.'.format(name)
            ret["changes"] = {
                name: {
                    "old": 'Zabbix Value map "{}" exists.'.format(name),
                    "new": 'Zabbix Value map "{}" would be deleted.'.format(name),
                }
            }
        else:
            valuemap_delete = __salt__["zabbix.run_query"](
                "valuemap.delete", [object_id], **kwargs
            )

            if valuemap_delete:
                ret["result"] = True
                ret["comment"] = 'Zabbix Value map "{}" deleted.'.format(name)
                ret["changes"] = {
                    name: {
                        "old": 'Zabbix Value map "{}" existed.'.format(name),
                        "new": 'Zabbix Value map "{}" deleted.'.format(name),
                    }
                }

    return ret
