import logging
import os
from time import sleep
from typing import Any, Dict, Optional

import requests

from . import api, exceptions
from .version import __version__

log = logging.getLogger(__name__)

LATEST_API_VERSION = 2

CLEARNET_ENDPOINT = "https://api.sporestack.com"
TOR_ENDPOINT = (
    "http://api.spore64i5sofqlfz5gq2ju4msgzojjwifls7rok2cti624zyq3fcelad.onion"
)

API_ENDPOINT = CLEARNET_ENDPOINT

GET_TIMEOUT = 60
POST_TIMEOUT = 90
USE_TOR_PROXY = "auto"


def _get_tor_proxy() -> str:
    """
    This makes testing easier.
    """
    return os.getenv("TOR_PROXY", "socks5h://127.0.0.1:9050")


# For requests module
TOR_PROXY_REQUESTS = {"http": _get_tor_proxy(), "https": _get_tor_proxy()}


def _is_onion_url(url: str) -> bool:
    """
    returns True/False depending on if a URL looks like a Tor hidden service
    (.onion) or not.
    This is designed to false as non-onion just to be on the safe-ish side,
    depending on your view point. It requires URLs like: http://domain.tld/,
    not http://domain.tld or domain.tld/.

    This can be optimized a lot.
    """
    try:
        url_parts = url.split("/")
        domain = url_parts[2]
        tld = domain.split(".")[-1]
        if tld == "onion":
            return True
    except Exception:
        pass
    return False


def _api_request(
    url: str,
    empty_post: bool = False,
    json_params: Optional[Dict[str, Any]] = None,
    retry: bool = False,
) -> Any:
    headers = {"User-Agent": f"sporestack-python/{__version__}"}
    proxies = {}
    if _is_onion_url(url) is True:
        log.debug("Got a .onion API endpoint, using local Tor SOCKS proxy.")
        proxies = TOR_PROXY_REQUESTS

    try:
        if empty_post is True:
            request = requests.post(
                url, timeout=POST_TIMEOUT, proxies=proxies, headers=headers
            )
        elif json_params is None:
            request = requests.get(
                url, timeout=GET_TIMEOUT, proxies=proxies, headers=headers
            )
        else:
            request = requests.post(
                url,
                json=json_params,
                timeout=POST_TIMEOUT,
                proxies=proxies,
                headers=headers,
            )
    except Exception as e:
        if retry is True:
            log.warning(f"Got an error, but retrying: {e}")
            sleep(5)
            # Try again.
            return _api_request(
                url,
                empty_post=empty_post,
                json_params=json_params,
                retry=retry,
            )
        else:
            raise

    status_code_first_digit = request.status_code // 100
    if status_code_first_digit == 2:
        try:
            return request.json()
        except Exception:
            return request.content
    elif status_code_first_digit == 4:
        log.debug("HTTP status code: {request.status_code}")
        raise exceptions.SporeStackUserError(request.content.decode("utf-8"))
    elif status_code_first_digit == 5:
        if retry is True:
            log.warning(request.content.decode("utf-8"))
            log.warning("Got a 500, retrying in 5 seconds...")
            sleep(5)
            # Try again if we get a 500
            return _api_request(
                url,
                empty_post=empty_post,
                json_params=json_params,
                retry=retry,
            )
        else:
            raise exceptions.SporeStackServerError(str(request.content))
    else:
        # Not sure why we'd get this.
        request.raise_for_status()
        raise Exception("Stuff broke strangely. Please contact SporeStack support.")


def launch(
    machine_id: str,
    days: int,
    currency: str,
    flavor: str,
    operating_system: str,
    ssh_key: str,
    api_endpoint: str = API_ENDPOINT,
    region: Optional[str] = None,
    token: Optional[str] = None,
    retry: bool = False,
    affiliate_token: Optional[str] = None,
) -> api.ServerLaunch.Response:
    request = api.ServerLaunch.Request(
        machine_id=machine_id,
        days=days,
        currency=currency,
        settlement_token=token,
        affiliate_token=affiliate_token,
        flavor=flavor,
        region=region,
        operating_system=operating_system,
        ssh_key=ssh_key,
    )
    url = api_endpoint + api.ServerLaunch.url.format(machine_id=machine_id)
    response = _api_request(url=url, json_params=request.dict(), retry=retry)
    response_object = api.ServerLaunch.Response.parse_obj(response)
    assert response_object.machine_id == machine_id
    return response_object


def topup(
    machine_id: str,
    days: int,
    currency: str,
    api_endpoint: str = API_ENDPOINT,
    token: Optional[str] = None,
    retry: bool = False,
    affiliate_token: Optional[str] = None,
) -> api.ServerTopup.Response:
    """
    Topup a server.
    """
    request = api.ServerTopup.Request(
        machine_id=machine_id,
        days=days,
        currency=currency,
        settlement_token=token,
        affiliate_token=affiliate_token,
    )
    url = api_endpoint + api.ServerTopup.url.format(machine_id=machine_id)
    response = _api_request(url=url, json_params=request.dict(), retry=retry)
    response_object = api.ServerTopup.Response.parse_obj(response)
    assert response_object.machine_id == machine_id
    return response_object


def start(machine_id: str, api_endpoint: str = API_ENDPOINT) -> None:
    """
    Boots the server.
    """
    url = api_endpoint + api.ServerStart.url.format(machine_id=machine_id)
    _api_request(url, empty_post=True)


def stop(machine_id: str, api_endpoint: str = API_ENDPOINT) -> None:
    """
    Powers off the server.
    """
    url = api_endpoint + api.ServerStop.url.format(machine_id=machine_id)
    _api_request(url, empty_post=True)


def delete(machine_id: str, api_endpoint: str = API_ENDPOINT) -> None:
    """
    Deletes the server.
    """
    url = api_endpoint + api.ServerDelete.url.format(machine_id=machine_id)
    _api_request(url, empty_post=True)


def rebuild(machine_id: str, api_endpoint: str = API_ENDPOINT) -> None:
    """
    Rebuilds the server with the operating system and SSH key set at launch time.

    Deletes all of the data on the server!
    """
    url = api_endpoint + api.ServerRebuild.url.format(machine_id=machine_id)
    _api_request(url, empty_post=True)


def info(machine_id: str, api_endpoint: str = API_ENDPOINT) -> api.ServerInfo.Response:
    """
    Returns info about the server.
    """
    url = api_endpoint + api.ServerInfo.url.format(machine_id=machine_id)
    response = _api_request(url)
    response_object = api.ServerInfo.Response.parse_obj(response)
    assert response_object.machine_id == machine_id
    return response_object


def token_enable(
    token: str,
    dollars: int,
    currency: str,
    api_endpoint: str = API_ENDPOINT,
    retry: bool = False,
) -> api.TokenEnable.Response:
    request = api.TokenEnable.Request(dollars=dollars, currency=currency)
    url = api_endpoint + api.TokenEnable.url.format(token=token)
    response = _api_request(url=url, json_params=request.dict(), retry=retry)
    response_object = api.TokenEnable.Response.parse_obj(response)
    assert response_object.token == token
    return response_object


def token_add(
    token: str,
    dollars: int,
    currency: str,
    api_endpoint: str = API_ENDPOINT,
    retry: bool = False,
) -> api.TokenAdd.Response:
    request = api.TokenAdd.Request(dollars=dollars, currency=currency)
    url = api_endpoint + api.TokenAdd.url.format(token=token)
    response = _api_request(url=url, json_params=request.dict(), retry=retry)
    response_object = api.TokenAdd.Response.parse_obj(response)
    assert response_object.token == token
    return response_object


def token_balance(
    token: str, api_endpoint: str = API_ENDPOINT
) -> api.TokenBalance.Response:
    url = api_endpoint + api.TokenBalance.url.format(token=token)
    response = _api_request(url=url)
    response_object = api.TokenBalance.Response.parse_obj(response)
    assert response_object.token == token
    return response_object