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# Source code for searx.engines.azure

    # SPDX-License-Identifier: AGPL-3.0-or-later
    """Engine for Azure resources.  This engine mimics the standard search bar in Azure
    Portal (for resources and resource groups).

    Configuration
    =============

    You must `register an application in Microsoft Entra ID`_ and assign it the
    'Reader' role in your subscription.

    To use this engine, add an entry similar to the following to your engine list in
    ``settings.yml``:

    .. code:: yaml

       - name: azure
         engine: azure
         ...
         azure_tenant_id: "your_tenant_id"
         azure_client_id: "your_client_id"
         azure_client_secret: "your_client_secret"
         azure_token_expiration_seconds: 5000

    .. _register an application in Microsoft Entra ID:
        https://learn.microsoft.com/en-us/entra/identity-platform/quickstart-register-app

    """
    import typing as t

    from searx.enginelib import EngineCache
    from searx.network import post as http_post
    from searx.result_types import EngineResults

    if t.TYPE_CHECKING:
        from searx.extended_types import SXNG_Response
        from searx.search.processors import OnlineParams

    engine_type = "online"
    categories = ["it", "cloud"]

    # Default values, should be overridden in settings.yml
    azure_tenant_id = ""
    azure_client_id = ""
    azure_client_secret = ""
    azure_token_expiration_seconds = 5000
    """Time for which an auth token is valid (sec.)"""
    azure_batch_endpoint = "https://management.azure.com/batch?api-version=2020-06-01"

    about = {
        "website": "https://www.portal.azure.com",
        "wikidata_id": "Q725967",
        "official_api_documentation": "https://learn.microsoft.com/en-us/\
        rest/api/azure-resourcegraph/?view=rest-azureresourcegraph-resourcegraph-2024-04-01",
        "use_official_api": True,
        "require_api_key": True,
        "results": "JSON",
    }
    language = "en"

    CACHE: EngineCache
    """Persistent (SQLite) key/value cache that deletes its values after ``expire``
    seconds."""

    def setup(engine_settings: dict[str, t.Any]) -> bool:
        """Initialization of the engine.

        - Instantiate a cache for this engine (:py:obj:`CACHE`).
        - Checks whether the tenant_id, client_id and client_secret are set,
          otherwise the engine is inactive.

        """
        global CACHE  # pylint: disable=global-statement
        CACHE = EngineCache(engine_settings["name"])

        missing_opts: list[str] = []
        for opt in ("azure_tenant_id", "azure_client_id", "azure_client_secret"):
            if not engine_settings.get(opt, ""):
                missing_opts.append(opt)
        if missing_opts:
            logger.error("missing values for options: %s", ", ".join(missing_opts))
            return False
        return True

    def authenticate(t_id: str, c_id: str, c_secret: str) -> str:
        """Authenticates to Azure using Oauth2 Client Credentials Flow and returns
        an access token."""

        url = f"https://login.microsoftonline.com/{t_id}/oauth2/v2.0/token"
        body = {
            "client_id": c_id,
            "client_secret": c_secret,
            "grant_type": "client_credentials",
            "scope": "https://management.azure.com/.default",
        }

        resp: SXNG_Response = http_post(url, body, timeout=5)
        if resp.status_code != 200:
            raise RuntimeError(f"Azure authentication failed (status {resp.status_code}): {resp.text}")
        return resp.json()["access_token"]

    def get_auth_token(t_id: str, c_id: str, c_secret: str) -> str:
        key = f"azure_tenant_id: {t_id:}, azure_client_id: {c_id}, azure_client_secret: {c_secret}"
        token: str | None = CACHE.get(key)
        if token:
            return token
        token = authenticate(t_id, c_id, c_secret)
        CACHE.set(key=key, value=token, expire=azure_token_expiration_seconds)
        return token

    def request(query: str, params: "OnlineParams") -> None:

        token = get_auth_token(azure_tenant_id, azure_client_id, azure_client_secret)

        params["url"] = azure_batch_endpoint
        params["method"] = "POST"
        params["headers"]["Authorization"] = f"Bearer {token}"
        params["headers"]["Content-Type"] = "application/json"
        params["json"] = {
            "requests": [
                {
                    "url": "/providers/Microsoft.ResourceGraph/resources?api-version=2024-04-01",
                    "httpMethod": "POST",
                    "name": "resourceGroups",
                    "requestHeaderDetails": {"commandName": "Microsoft.ResourceGraph"},
                    "content": {
                        "query": (
                            f"ResourceContainers"
                            f" | where (name contains ('{query}'))"
                            f" | where (type =~ ('Microsoft.Resources/subscriptions/resourcegroups'))"
                            f" | project id,name,type,kind,subscriptionId,resourceGroup"
                            f" | extend matchscore = name startswith '{query}'"
                            f" | extend normalizedName = tolower(tostring(name))"
                            f" | sort by matchscore desc, normalizedName asc"
                            f" | take 30"
                        )
                    },
                },
                {
                    "url": "/providers/Microsoft.ResourceGraph/resources?api-version=2024-04-01",
                    "httpMethod": "POST",
                    "name": "resources",
                    "requestHeaderDetails": {
                        "commandName": "Microsoft.ResourceGraph",
                    },
                    "content": {
                        "query": f"Resources | where name contains '{query}' | take 30",
                    },
                },
            ]
        }

    def response(resp: "SXNG_Response") -> EngineResults:
        res = EngineResults()
        json_data = resp.json()

        for result in json_data["responses"]:
            if result["name"] == "resourceGroups":
                for data in result["content"]["data"]:
                    res.add(
                        res.types.MainResult(
                            url=(
                                f"https://portal.azure.com/#@/resource"
                                f"/subscriptions/{data['subscriptionId']}/resourceGroups/{data['name']}/overview"
                            ),
                            title=data["name"],
                            content=f"Resource Group in Subscription: {data['subscriptionId']}",
                        )
                    )
            elif result["name"] == "resources":
                for data in result["content"]["data"]:
                    res.add(
                        res.types.MainResult(
                            url=(
                                f"https://portal.azure.com/#@/resource"
                                f"/subscriptions/{data['subscriptionId']}/resourceGroups/{data['resourceGroup']}"
                                f"/providers/{data['type']}/{data['name']}/overview"
                            ),
                            title=data["name"],
                            content=(
                                f"Resource of type {data['type']} in Subscription:"
                                f" {data['subscriptionId']}, Resource Group: {data['resourceGroup']}"
                            ),
                        )
                    )
        return res