# coding=utf-8
# --------------------------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for license information.
# --------------------------------------------------------------------------------------------
# Nothing in this file should be used outside of service/central

from knack.util import to_snake_case, to_camel_case
from requests import Response
from knack.log import logging

from azure.cli.core.azclierror import (
    AzureResponseError,
    CLIInternalError,
)
from azext_iot import constants
from azext_iot.common import auth

import requests
import uuid
from importlib import import_module
from azext_iot.central.models.enum import ApiVersion
from azure.cli.core.util import should_disable_connection_verify


def make_api_call(
    cmd,
    app_id: str,
    method: str,
    url: str,
    payload,
    token: str,
    api_version: str,
    central_dnx_suffix: str,
) -> dict:

    headers = get_headers(
        token, cmd, has_json_payload=True if payload is not None else False
    )

    # Construct parameters
    query_parameters = {}
    query_parameters["api-version"] = api_version

    response = requests.request(
        url=url,
        method=method.upper(),
        headers=headers,
        params=query_parameters,
        json=payload,
        verify=not should_disable_connection_verify(),
    )
    return try_extract_result(response)


def get_headers(token, cmd, has_json_payload=False):
    if not token:
        aad_token = auth.get_aad_token(cmd.cli_ctx, resource="https://apps.azureiotcentral.com")
        token = "Bearer {}".format(aad_token["accessToken"])

    headers = {
        "Authorization": token,
        "User-Agent": constants.USER_AGENT,
        "x-ms-client-request-id": str(uuid.uuid1()),
    }

    if has_json_payload:
        headers["Content-Type"] = "application/json"
    return headers


def try_extract_result(response: Response):
    # 201 and 204 response codes indicate success
    # with no content, hence attempting to retrieve content will fail
    if response.status_code in [201, 204]:
        return {"result": "success"}

    try:
        body = response.json()
    except Exception:
        raise CLIInternalError("Error parsing response body")

    if "error" in body:
        raise AzureResponseError(body["error"])

    return body


def log_response_debug(response: Response, logger: logging.Logger):
    logger.debug("Response status code: {}".format(response.status_code))
    logger.debug("Response url: {}".format(response.url))
    logger.debug("Response headers: {}".format(response.headers))


# Only latest GA and latest Preview version are supported
def get_object(data: dict, model: str, api_version) -> object:
    try:
        if api_version == ApiVersion.ga.value:
            module = getattr(
                import_module(
                    "azext_iot.central.models.ga_2022_07_31.{}".format(to_snake_case(model))
                ),
                model,
            )
            return module(data)
        else:
            module = getattr(
                import_module(
                    "azext_iot.central.models.v2022_06_30_preview.{}".format(to_snake_case(model))
                ),
                model,
            )
            return module(data)
    except Exception:
        raise CLIInternalError(
            "{} is not available for api version == {}".format(model, api_version)
        )


def to_camel_dict(data: dict) -> dict:
    keys = list(data.keys())
    res = {}
    for key in keys:
        res[to_camel_case(key)] = data[key]

    return res