#!/usr/bin/python3
import requests
import zipfile
from io import BytesIO
import os
from collections import OrderedDict
import shutil
import json

import xml.etree.ElementTree as ET

VERSION = "DSP8010_2021.3"

# To use a new schema, add to list and rerun tool
include_list = [
    'AccountService',
    'ActionInfo',
    'Assembly',
    'AttributeRegistry',
    'Bios',
    'Certificate',
    'CertificateCollection',
    'CertificateLocations',
    'CertificateService',
    'Chassis',
    'ChassisCollection',
    'ComputerSystem',
    'ComputerSystemCollection',
    'Drive',
    'DriveCollection',
    'EthernetInterface',
    'EthernetInterfaceCollection',
    'Event',
    'EventDestination',
    'EventDestinationCollection',
    'EventService',
    'IPAddresses',
    'JsonSchemaFile',
    'JsonSchemaFileCollection',  # redfish/v1/JsonSchemas
    'LogEntry',
    'LogEntryCollection',
    'LogService',
    'LogServiceCollection',
    'Manager',
    'ManagerAccount',
    'ManagerAccountCollection',
    'ManagerCollection',
    'ManagerNetworkProtocol',
    'Memory',
    'MemoryCollection',
    'Message',
    'MessageRegistry',
    'MessageRegistryCollection',
    'MessageRegistryFile',
    'MessageRegistryFileCollection',
    'MetricDefinition',
    'MetricDefinitionCollection',
    'MetricReport',
    'MetricReportCollection',
    'MetricReportDefinition',
    'MetricReportDefinitionCollection',
    'OperatingConfig',
    'OperatingConfigCollection',
    'PCIeDevice',
    'PCIeDeviceCollection',
    'PCIeFunction',
    'PCIeFunctionCollection',
    'Power',
    'Privileges',  # Used in Role
    'Processor',
    'ProcessorCollection',
    'RedfishError',
    'RedfishExtensions',
    'Redundancy',
    'Resource',
    'Role',
    'RoleCollection',
    'Sensor',
    'SensorCollection',
    'ServiceRoot',
    'Session',
    'SessionCollection',
    'SessionService',
    'Settings',
    'SoftwareInventory',
    'SoftwareInventoryCollection',
    'Storage',
    'StorageCollection',
    'StorageController',
    'StorageControllerCollection',
    'Task',
    'TaskCollection',
    'TaskService',
    'TelemetryService',
    'Thermal',
    'Triggers',
    'TriggersCollection',
    'UpdateService',
    'VLanNetworkInterfaceCollection',
    'VLanNetworkInterface',
    'VirtualMedia',
    'VirtualMediaCollection',
    'odata',
    'odata-v4',
    'redfish-error',
    'redfish-payload-annotations',
    'redfish-schema',
    'redfish-schema-v1',
]

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

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

r = requests.get(
    'https://www.dmtf.org/sites/default/files/standards/documents/' +
    VERSION +
    '.zip',
    proxies=proxies)

r.raise_for_status()

static_path = os.path.realpath(os.path.join(SCRIPT_DIR, "..", "static",
                                            "redfish", "v1"))

schema_path = os.path.join(static_path, "schema")
json_schema_path = os.path.join(static_path, "JsonSchemas")
metadata_index_path = os.path.join(static_path, "$metadata", "index.xml")

zipBytesIO = BytesIO(r.content)
zip_ref = zipfile.ZipFile(zipBytesIO)

# Remove the old files
skip_prefixes = ('Oem')
if os.path.exists(schema_path):
    files = [os.path.join(schema_path, f) for f in os.listdir(schema_path)
             if not f.startswith(skip_prefixes)]
    for f in files:
        os.remove(f)
if os.path.exists(json_schema_path):
    files = [os.path.join(json_schema_path, f) for f in
             os.listdir(json_schema_path) if not f.startswith(skip_prefixes)]
    for f in files:
        if (os.path.isfile(f)):
            os.remove(f)
        else:
            shutil.rmtree(f)
os.remove(metadata_index_path)

if not os.path.exists(schema_path):
    os.makedirs(schema_path)
if not os.path.exists(json_schema_path):
    os.makedirs(json_schema_path)

with open(metadata_index_path, 'w') as metadata_index:

    metadata_index.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n")
    metadata_index.write(
        "<edmx:Edmx xmlns:edmx="
        "\"http://docs.oasis-open.org/odata/ns/edmx\""
        " Version=\"4.0\">\n")

    for zip_filepath in zip_ref.namelist():
        if zip_filepath.startswith('csdl/') and \
            (zip_filepath != VERSION + "/csdl/") and \
                (zip_filepath != "csdl/"):
            filename = os.path.basename(zip_filepath)

            # filename looks like Zone_v1.xml
            filenamesplit = filename.split("_")
            if filenamesplit[0] not in include_list:
                print("excluding schema: " + filename)
                continue

            with open(os.path.join(schema_path, filename), 'wb') as schema_out:

                metadata_index.write(
                    "    <edmx:Reference Uri=\"/redfish/v1/schema/" +
                    filename +
                    "\">\n")

                content = zip_ref.read(zip_filepath)
                content = content.replace(b'\r\n', b'\n')
                xml_root = ET.fromstring(content)
                edmx = "{http://docs.oasis-open.org/odata/ns/edmx}"
                edm = "{http://docs.oasis-open.org/odata/ns/edm}"
                for edmx_child in xml_root:
                    if edmx_child.tag == edmx + "DataServices":
                        for data_child in edmx_child:
                            if data_child.tag == edm + "Schema":
                                namespace = data_child.attrib["Namespace"]
                                if namespace.startswith("RedfishExtensions"):
                                    metadata_index.write(
                                        "        "
                                        "<edmx:Include Namespace=\"" +
                                        namespace +
                                        "\"  Alias=\"Redfish\"/>\n"
                                    )

                                else:
                                    metadata_index.write(
                                        "        "
                                        "<edmx:Include Namespace=\""
                                        + namespace + "\"/>\n"
                                    )
                schema_out.write(content)
                metadata_index.write("    </edmx:Reference>\n")

    metadata_index.write("    <edmx:DataServices>\n"
                         "        <Schema "
                         "xmlns=\"http://docs.oasis-open.org/odata/ns/edm\" "
                         "Namespace=\"Service\">\n"
                         "            <EntityContainer Name=\"Service\" "
                         "Extends=\"ServiceRoot.v1_0_0.ServiceContainer\"/>\n"
                         "        </Schema>\n"
                         "    </edmx:DataServices>\n"
                         )
    # TODO:Issue#32 There's a bug in the script that currently deletes this
    # schema (because it's an OEM schema). Because it's the only six, and we
    # don't update schemas very often, we just manually fix it. Need a
    # permanent fix to the script.
    metadata_index.write(
        "    <edmx:Reference Uri=\"/redfish/v1/schema/OemManager_v1.xml\">\n")
    metadata_index.write("        <edmx:Include Namespace=\"OemManager\"/>\n")
    metadata_index.write("    </edmx:Reference>\n")

    metadata_index.write(
        "    <edmx:Reference Uri=\""
        "/redfish/v1/schema/OemComputerSystem_v1.xml\">\n")
    metadata_index.write(
        "        <edmx:Include Namespace=\"OemComputerSystem\"/>\n")
    metadata_index.write("    </edmx:Reference>\n")

    metadata_index.write(
        "    <edmx:Reference Uri=\""
        "/redfish/v1/schema/OemVirtualMedia_v1.xml\">\n")
    metadata_index.write(
        "        <edmx:Include Namespace=\"OemVirtualMedia\"/>\n")
    metadata_index.write(
        "        <edmx:Include Namespace=\"OemVirtualMedia.v1_0_0\"/>\n")
    metadata_index.write("    </edmx:Reference>\n")

    metadata_index.write(
        "    <edmx:Reference Uri=\""
        "/redfish/v1/schema/OemAccountService_v1.xml\">\n")
    metadata_index.write(
        "        <edmx:Include Namespace=\"OemAccountService\"/>\n")
    metadata_index.write(
        "        <edmx:Include Namespace=\"OemAccountService.v1_0_0\"/>\n")
    metadata_index.write("    </edmx:Reference>\n")

    metadata_index.write(
        "    <edmx:Reference Uri=\"/redfish/v1/schema/OemSession_v1.xml\">\n")
    metadata_index.write("        <edmx:Include Namespace=\"OemSession\"/>\n")
    metadata_index.write(
        "        <edmx:Include Namespace=\"OemSession.v1_0_0\"/>\n")
    metadata_index.write("    </edmx:Reference>\n")

    metadata_index.write("</edmx:Edmx>\n")

schema_files = {}
for zip_filepath in zip_ref.namelist():
    if zip_filepath.startswith(os.path.join('json-schema/')):
        filename = os.path.basename(zip_filepath)
        filenamesplit = filename.split(".")

        # exclude schemas again to save flash space
        if filenamesplit[0] not in include_list:
            continue

        if len(filenamesplit) == 3:
            thisSchemaVersion = schema_files.get(filenamesplit[0], None)
            if thisSchemaVersion is None:
                schema_files[filenamesplit[0]] = filenamesplit[1]
            else:
                # need to see if we're a newer version.
                if list(map(int, filenamesplit[1][1:].split("_"))) > list(map(
                        int, thisSchemaVersion[1:].split("_"))):
                    schema_files[filenamesplit[0]] = filenamesplit[1]


for schema, version in schema_files.items():
    basename = schema + "." + version + ".json"
    zip_filepath = os.path.join("json-schema", basename)
    schemadir = os.path.join(json_schema_path, schema)
    os.makedirs(schemadir)
    location_json = OrderedDict()
    location_json["Language"] = "en"
    location_json["PublicationUri"] = (
        "http://redfish.dmtf.org/schemas/v1/" + schema + ".json")
    location_json["Uri"] = (
        "/redfish/v1/JsonSchemas/" + schema + "/" + schema + ".json")

    index_json = OrderedDict()
    index_json["@odata.context"] = \
        "/redfish/v1/$metadata#JsonSchemaFile.JsonSchemaFile"
    index_json["@odata.id"] = "/redfish/v1/JsonSchemas/" + schema
    index_json["@odata.type"] = "#JsonSchemaFile.v1_0_2.JsonSchemaFile"
    index_json["Name"] = schema + " Schema File"
    index_json["Schema"] = "#" + schema + "." + schema
    index_json["Description"] = schema + " Schema File Location"
    index_json["Id"] = schema
    index_json["Languages"] = ["en"]
    index_json["Languages@odata.count"] = 1
    index_json["Location"] = [location_json]
    index_json["Location@odata.count"] = 1

    with open(os.path.join(schemadir, "index.json"), 'w') as schema_file:
        json.dump(index_json, schema_file, indent=4)
    with open(os.path.join(schemadir, schema + ".json"), 'wb') as schema_file:
        schema_file.write(zip_ref.read(zip_filepath).replace(b'\r\n', b'\n'))

with open(os.path.join(json_schema_path, "index.json"), 'w') as index_file:
    members = [{"@odata.id": "/redfish/v1/JsonSchemas/" + schema}
               for schema in schema_files]

    members.sort(key=lambda x: x["@odata.id"])

    indexData = OrderedDict()

    indexData["@odata.id"] = "/redfish/v1/JsonSchemas"
    indexData["@odata.context"] = ("/redfish/v1/$metadata"
                                   "#JsonSchemaFileCollection."
                                   "JsonSchemaFileCollection")
    indexData["@odata.type"] = ("#JsonSchemaFileCollection."
                                "JsonSchemaFileCollection")
    indexData["Name"] = "JsonSchemaFile Collection"
    indexData["Description"] = "Collection of JsonSchemaFiles"
    indexData["Members@odata.count"] = len(schema_files)
    indexData["Members"] = members

    json.dump(indexData, index_file, indent=2)

zip_ref.close()