#!/usr/bin/python3
import requests
import zipfile
from io import BytesIO
import os
from collections import defaultdict
from collections import OrderedDict
from distutils.version import StrictVersion
import shutil
import json
import glob
import subprocess

import xml.etree.ElementTree as ET

WARNING = '''/****************************************************************
 *                 READ THIS WARNING FIRST
 * This is an auto-generated header which contains definitions
 * for Redfish DMTF defined messages.
 * DO NOT modify this registry outside of running the
 * parse_regisries.py script.  The definitions contained within
 * this file are owned by DMTF.  Any modifications to these files
 * should be first pushed to the relevant registry in the DMTF
 * github organization.
 ***************************************************************/'''

REGISTRY_HEADER = WARNING + '''
#pragma once
#include <registries.hpp>

// clang-format off

namespace redfish::message_registries::{}
{{
'''

SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))

include_path = os.path.realpath(
    os.path.join(
        SCRIPT_DIR,
        "..",
        "redfish-core",
        "include",
        "registries"))

proxies = {
    'https': os.environ.get("https_proxy", None)
}


def make_getter(dmtf_name, header_name, type_name):
    url = 'https://redfish.dmtf.org/registries/{}'.format(dmtf_name)
    dmtf = requests.get(url, proxies=proxies)
    dmtf.raise_for_status()
    json_file = json.loads(dmtf.text)
    path = os.path.join(include_path, header_name)
    return (path, json_file, type_name, url)


files = []
files.append(make_getter('Base.1.11.0.json',
                         'base_message_registry.hpp',
                         'base'))
files.append(make_getter('TaskEvent.1.0.3.json',
                         'task_event_message_registry.hpp',
                         'task_event'))
files.append(make_getter('ResourceEvent.1.0.3.json',
                         'resource_event_message_registry.hpp',
                         'resource_event'))

# Remove the old files
for file, json_dict, namespace, url in files:
    try:
        os.remove(file)
    except BaseException:
        print("{} not found".format(file))

    with open(file, 'w') as registry:
        registry.write(REGISTRY_HEADER.format(namespace))
        # Parse the Registry header info
        registry.write(
            "const Header header = {{\n"
            "    \"{json_dict[@Redfish.Copyright]}\",\n"
            "    \"{json_dict[@odata.type]}\",\n"
            "    \"{json_dict[Id]}\",\n"
            "    \"{json_dict[Name]}\",\n"
            "    \"{json_dict[Language]}\",\n"
            "    \"{json_dict[Description]}\",\n"
            "    \"{json_dict[RegistryPrefix]}\",\n"
            "    \"{json_dict[RegistryVersion]}\",\n"
            "    \"{json_dict[OwningEntity]}\",\n"
            "}};\n"
            "constexpr const char* url =\n"
            "    \"{url}\";\n"
            "\n"
            "constexpr std::array<MessageEntry, {message_len}> registry =\n"
            "{{\n".format(
                json_dict=json_dict,
                url=url,
                message_len=len(json_dict["Messages"]),
            ))

        messages_sorted = sorted(json_dict["Messages"].items())
        for messageId, message in messages_sorted:
            registry.write(
                "    MessageEntry{{\n"
                "        \"{messageId}\",\n"
                "        {{\n"
                "            \"{message[Description]}\",\n"
                "            \"{message[Message]}\",\n"
                "            \"{message[Severity]}\",\n"
                "            \"{message[MessageSeverity]}\",\n"
                "            {message[NumberOfArgs]},\n"
                "            {{".format(
                    messageId=messageId,
                    message=message
                ))
            paramTypes = message.get("ParamTypes")
            if paramTypes:
                for paramType in paramTypes:
                    registry.write(
                        "\n"
                        "                \"{}\",".format(paramType)
                    )
                registry.write("\n            },\n")
            else:
                registry.write("},\n")
            registry.write(
                "            \"{message[Resolution]}\",\n"
                "        }}}},\n".format(message=message))

        registry.write(
            "\n};\n"
            "\n"
            "enum class Index\n"
            "{\n"
        )
        for index, (messageId, message) in enumerate(messages_sorted):
            messageId = messageId[0].lower() + messageId[1:]
            registry.write(
                "    {} = {},\n".format(messageId, index))
        registry.write(
            "}};\n"
            "}} // namespace redfish::message_registries::{}\n"
            .format(namespace))


def get_privilege_string_from_list(privilege_list):
    privilege_string = "{{\n"
    for privilege_json in privilege_list:
        privileges = privilege_json["Privilege"]
        privilege_string += "    {"
        for privilege in privileges:
            if privilege == "NoAuth":
                continue
            privilege_string += "\""
            privilege_string += privilege
            privilege_string += "\",\n"
        if privilege != "NoAuth":
            privilege_string = privilege_string[:-2]
        privilege_string += "}"
        privilege_string += ",\n"
    privilege_string = privilege_string[:-2]
    privilege_string += "\n}}"
    return privilege_string


def get_variable_name_for_privilege_set(privilege_list):
    names = []
    for privilege_json in privilege_list:
        privileges = privilege_json["Privilege"]
        names.append("And".join(privileges))
    return "Or".join(names)


def make_privilege_registry():
    path, json_file, type_name, url = \
        make_getter('Redfish_1.2.0_PrivilegeRegistry.json',
                    'privilege_registry.hpp', 'privilege')
    with open(path, 'w') as registry:
        registry.write(
            "#pragma once\n"
            "{WARNING}\n"
            "// clang-format off\n"
            "\n"
            "#include <privileges.hpp>\n"
            "\n"
            "namespace redfish::privileges\n"
            "{{\n"
            .format(
                WARNING=WARNING,
                filename=os.path.basename(path)))

        privilege_dict = {}
        for mapping in json_file["Mappings"]:
            # first pass, identify all the unique privilege sets
            for operation, privilege_list in mapping["OperationMap"].items():
                privilege_dict[get_privilege_string_from_list(
                    privilege_list)] = (privilege_list, )
        for index, key in enumerate(privilege_dict):
            (privilege_list, ) = privilege_dict[key]
            name = get_variable_name_for_privilege_set(privilege_list)
            registry.write(
                "const std::array<Privileges, {length}> "
                "privilegeSet{name} = {key};\n"
                .format(length=len(privilege_list), name=name, key=key)
            )
            privilege_dict[key] = (privilege_list, name)

        for mapping in json_file["Mappings"]:
            entity = mapping["Entity"]
            registry.write("// {}\n".format(entity))
            for operation, privilege_list in mapping["OperationMap"].items():
                privilege_string = get_privilege_string_from_list(
                    privilege_list)
                operation = operation.lower()

                registry.write(
                    "const static auto& {}{} = privilegeSet{};\n".format(
                        operation,
                        entity,
                        privilege_dict[privilege_string][1]))
            registry.write("\n")
        registry.write(
            "} // namespace redfish::privileges\n"
            "// clang-format on\n")


make_privilege_registry()