# Copyright (c) 2020, Moritz E. Beber.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


"""Provide the Structurizr client settings."""


import logging
from getpass import getuser
from pathlib import Path
from socket import getfqdn

from pydantic import UUID4, BaseSettings, DirectoryPath, Field, HttpUrl

from .. import __version__


__all__ = ("StructurizrClientSettings",)


logger = logging.getLogger(__name__)


try:
    USER = getuser()
except ModuleNotFoundError:
    logger.error(
        "Could not determine the username. Please set it manually or provide a "
        "STRUCTURIZR_USER environment variable."
    )
    USER = "anonymous"
hostname = getfqdn()
if hostname:
    USER = f"{USER}@{hostname}"

AGENT = f"structurizr-python/{__version__}"


class StructurizrClientSettings(BaseSettings):
    """
    Define the Structurizr client settings.

    Attributes:
        url (str): The Structurizr API URL.
        workspace_id (int): The Structurizr workspace identifier.
        api_key (str): The Structurizr workspace API key.
        api_secret (str): The Structurizr workspace API secret.
        user (str): A string identifying the user (e.g. an e-mail address or username).
        agent (str): A string identifying the agent (e.g. 'structurizr-java/1.2.0').
        workspace_archive_location (pathlib.Path): A directory for archiving downloaded
            workspaces.

    """

    url: HttpUrl = Field(
        "https://api.structurizr.com",
        env="STRUCTURIZR_URL",
        description="The Structurizr API URL.",
    )
    workspace_id: int = Field(
        ...,
        env="STRUCTURIZR_WORKSPACE_ID",
        description="The Structurizr workspace identifier.",
    )
    api_key: UUID4 = Field(
        ...,
        env="STRUCTURIZR_API_KEY",
        description="The Structurizr workspace API key.",
    )
    api_secret: UUID4 = Field(
        ...,
        env="STRUCTURIZR_API_SECRET",
        description="The Structurizr workspace API secret.",
    )
    user: str = Field(
        USER,
        env="STRUCTURIZR_USER",
        description="A string identifying the user (e.g. an e-mail address or "
        "username).",
    )
    agent: str = Field(
        AGENT,
        env="STRUCTURIZR_AGENT",
        description="A string identifying the agent (e.g. 'structurizr-java/1.2.0').",
    )
    workspace_archive_location: DirectoryPath = Field(
        Path.cwd(),
        env="STRUCTURIZR_WORKSPACE_ARCHIVE_LOCATION",
        description="A directory for archiving downloaded workspaces.",
    )

    class Config:
        """Configure the Structurizr client settings."""

        case_sensitive = True
        env_prefix = "STRUCTURIZR_"
        env_file = ".env"
