#!/usr/bin/python
# -*- encoding: utf-8; py-indent-offset: 4 -*-
# +------------------------------------------------------------------+
# |             ____ _               _        __  __ _  __           |
# |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
# |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
# |           | |___| | | |  __/ (__|   <    | |  | | . \            |
# |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
# |                                                                  |
# | Copyright Mathias Kettner 2018             mk@mathias-kettner.de |
# +------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk is free software;  you can redistribute it and/or modify it
# under the  terms of the  GNU General Public License  as published by
# the Free Software Foundation in version 2.  check_mk is  distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
# out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
# PARTICULAR PURPOSE. See the  GNU General Public License for more de-
# tails. You should have  received  a copy of the  GNU  General Public
# License along with GNU Make; see the file  COPYING.  If  not,  write
# to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
# Boston, MA 02110-1301 USA.


def _parse_docker_node_images(info):
    import json
    parsed = {}
    section_name = None
    for line in info:
        if line[0].startswith("[[[") and line[0].endswith("]]]"):
            section_name = line[0][3:-3]
            continue

        data = json.loads(" ".join(line))

        if section_name == "images" and data:
            parsed.setdefault(data["ID"], data)

        elif section_name == "images_labels":
            if len(data) == 2:
                image_id, labels = data
                image = parsed.get(image_id)
                if image is not None and labels:
                    image.setdefault("__labels__", labels)

        elif section_name == "containers":
            image_name = data["Image"]
            if ":" in image_name:
                repository, tag = image_name.split(":", 1)
            else:
                repository, tag = image_name, "latest"

            image = parsed.get((repository, tag))
            if image is not None:
                image.setdefault("__containers__", []).append(data)
    return parsed


def inv_docker_node_images(info, inventory_tree, status_data_tree):
    parsed = _parse_docker_node_images(info)
    path = "software.applications.docker.images:"
    inv_node = inventory_tree.get_list(path)
    status_node = status_data_tree.get_list(path)

    for image_id, image in sorted(parsed.iteritems()):
        inv_node.append({
            "repository"        : image["Repository"],
            "tag"               : image["Tag"],
            "id"                : image_id,
            "creation"          : image["CreatedAt"],
            "size"              : image["VirtualSize"],
            "labels"            : _format_labels(image.get("__labels__", {}).items()),
        })

        status_node.append({
            "repository"        : image["Repository"],
            "tag"               : image["Tag"],
            "id"                : image_id,
            "amount_containers" : len(image.get("__containers__", [])),
        })


inv_info['docker_node_images'] = {
    'inv_function'    : inv_docker_node_images,
    'has_status_data' : True,
}


def _parse_docker_node_containers(info):
    import json
    parsed = {}
    section_name = None
    for line in info:
        if line[0].startswith("[[[") and line[0].endswith("]]]"):
            section_name = line[0][3:-3]
            continue

        if section_name != "containers":
            continue

        data = json.loads(" ".join(line))

        image_name = data["Image"]
        if ":" in image_name:
            data["Repository"], data["Tag"] = image_name.split(":", 1)
        else:
            data["Repository"], data["Tag"] = image_name, "latest"

        data["Labels"] = [ p.split("=", 1) for p in data["Labels"].split(",") ]

        parsed[data["ID"]] = data


    return parsed


def inv_docker_node_images_containers(info, inventory_tree, status_data_tree):
    parsed = _parse_docker_node_containers(info)
    status_node = status_data_tree.get_list("software.applications.docker.containers:")

    for id_, container in sorted(parsed.iteritems()):
        status_node.append({
            "id"                : id_,
            "repository"        : container["Repository"],
            "tag"               : container["Tag"],
            "name"              : container["Names"],
            "creation"          : container["CreatedAt"],
            "labels"            : _format_labels(container["Labels"]),
            "status"            : container["Status"],
        })


def _format_labels(labels):
    return ", ".join([ ": ".join(p) for p in labels ])

# TODO: This section contains also information about the containers. We should
# better split it into multiple sections and add them to the different plugins
# using the extra_sections feature. In case this is not possible for the inventory
# plugins at the moment we should make it possible.
inv_info['docker_node_images.containers'] = {
    'inv_function'    : inv_docker_node_images_containers,
    'has_status_data' : True,
}
