# This file was auto-generated by Fern from our API Definition.

import asyncio
import email.utils
import re
import time
import typing
import urllib.parse
from contextlib import asynccontextmanager, contextmanager
from random import random

import httpx

from .file import File, convert_file_dict_to_httpx_tuples
from .jsonable_encoder import jsonable_encoder
from .query_encoder import encode_query
from .remove_none_from_dict import remove_none_from_dict
from .request_options import RequestOptions

INITIAL_RETRY_DELAY_SECONDS = 0.5
MAX_RETRY_DELAY_SECONDS = 10
MAX_RETRY_DELAY_SECONDS_FROM_HEADER = 30


def _parse_retry_after(response_headers: httpx.Headers) -> typing.Optional[float]:
    """
    This function parses the `Retry-After` header in a HTTP response and returns the number of seconds to wait.

    Inspired by the urllib3 retry implementation.
    """
    retry_after_ms = response_headers.get("retry-after-ms")
    if retry_after_ms is not None:
        try:
            return int(retry_after_ms) / 1000 if retry_after_ms > 0 else 0
        except Exception:
            pass

    retry_after = response_headers.get("retry-after")
    if retry_after is None:
        return None

    # Attempt to parse the header as an int.
    if re.match(r"^\s*[0-9]+\s*$", retry_after):
        seconds = float(retry_after)
    # Fallback to parsing it as a date.
    else:
        retry_date_tuple = email.utils.parsedate_tz(retry_after)
        if retry_date_tuple is None:
            return None
        if retry_date_tuple[9] is None:  # Python 2
            # Assume UTC if no timezone was specified
            # On Python2.7, parsedate_tz returns None for a timezone offset
            # instead of 0 if no timezone is given, where mktime_tz treats
            # a None timezone offset as local time.
            retry_date_tuple = retry_date_tuple[:9] + (0,) + retry_date_tuple[10:]

        retry_date = email.utils.mktime_tz(retry_date_tuple)
        seconds = retry_date - time.time()

    if seconds < 0:
        seconds = 0

    return seconds


def _retry_timeout(response: httpx.Response, retries: int) -> float:
    """
    Determine the amount of time to wait before retrying a request.
    This function begins by trying to parse a retry-after header from the response, and then proceeds to use exponential backoff
    with a jitter to determine the number of seconds to wait.
    """

    # If the API asks us to wait a certain amount of time (and it's a reasonable amount), just do what it says.
    retry_after = _parse_retry_after(response.headers)
    if retry_after is not None and retry_after <= MAX_RETRY_DELAY_SECONDS_FROM_HEADER:
        return retry_after

    # Apply exponential backoff, capped at MAX_RETRY_DELAY_SECONDS.
    retry_delay = min(INITIAL_RETRY_DELAY_SECONDS * pow(2.0, retries), MAX_RETRY_DELAY_SECONDS)

    # Add a randomness / jitter to the retry delay to avoid overwhelming the server with retries.
    timeout = retry_delay * (1 - 0.25 * random())
    return timeout if timeout >= 0 else 0


def _should_retry(response: httpx.Response) -> bool:
    retriable_400s = [429, 408, 409]
    return response.status_code >= 500 or response.status_code in retriable_400s


def remove_omit_from_dict(
    original: typing.Dict[str, typing.Optional[typing.Any]], omit: typing.Optional[typing.Any]
) -> typing.Dict[str, typing.Any]:
    if omit is None:
        return original
    new: typing.Dict[str, typing.Any] = {}
    for key, value in original.items():
        if value is not omit:
            new[key] = value
    return new


def maybe_filter_request_body(
    data: typing.Optional[typing.Any],
    request_options: typing.Optional[RequestOptions],
    omit: typing.Optional[typing.Any],
) -> typing.Optional[typing.Any]:
    if data is None:
        return (
            jsonable_encoder(request_options.get("additional_body_parameters", {}))
            if request_options is not None
            else None
        )
    elif not isinstance(data, typing.Mapping):
        data_content = jsonable_encoder(data)
    else:
        data_content = {
            **(jsonable_encoder(remove_omit_from_dict(data, omit))),  # type: ignore
            **(
                jsonable_encoder(request_options.get("additional_body_parameters", {}))
                if request_options is not None
                else {}
            ),
        }
    return data_content


class HttpClient:
    def __init__(
        self,
        *,
        httpx_client: httpx.Client,
        base_timeout: typing.Optional[float],
        base_headers: typing.Dict[str, str],
        base_url: typing.Optional[str] = None,
    ):
        self.base_url = base_url
        self.base_timeout = base_timeout
        self.base_headers = base_headers
        self.httpx_client = httpx_client

    def get_base_url(self, maybe_base_url: typing.Optional[str]) -> str:
        base_url = self.base_url if maybe_base_url is None else maybe_base_url
        if base_url is None:
            raise ValueError("A base_url is required to make this request, please provide one and try again.")
        return base_url

    def request(
        self,
        path: typing.Optional[str] = None,
        *,
        method: str,
        base_url: typing.Optional[str] = None,
        params: typing.Optional[typing.Dict[str, typing.Any]] = None,
        json: typing.Optional[typing.Any] = None,
        data: typing.Optional[typing.Any] = None,
        content: typing.Optional[typing.Union[bytes, typing.Iterator[bytes], typing.AsyncIterator[bytes]]] = None,
        files: typing.Optional[typing.Dict[str, typing.Optional[typing.Union[File, typing.List[File]]]]] = None,
        headers: typing.Optional[typing.Dict[str, typing.Any]] = None,
        request_options: typing.Optional[RequestOptions] = None,
        retries: int = 0,
        omit: typing.Optional[typing.Any] = None,
    ) -> httpx.Response:
        base_url = self.get_base_url(base_url)
        timeout = (
            request_options.get("timeout_in_seconds")
            if request_options is not None and request_options.get("timeout_in_seconds") is not None
            else self.base_timeout
        )

        response = self.httpx_client.request(
            method=method,
            url=urllib.parse.urljoin(f"{base_url}/", path),
            headers=jsonable_encoder(
                remove_none_from_dict(
                    {
                        **self.base_headers,
                        **(headers if headers is not None else {}),
                        **(request_options.get("additional_headers", {}) if request_options is not None else {}),
                    }
                )
            ),
            params=encode_query(
                jsonable_encoder(
                    remove_none_from_dict(
                        remove_omit_from_dict(
                            {
                                **(params if params is not None else {}),
                                **(
                                    request_options.get("additional_query_parameters", {})
                                    if request_options is not None
                                    else {}
                                ),
                            },
                            omit,
                        )
                    )
                )
            ),
            json=maybe_filter_request_body(json, request_options, omit),
            data=maybe_filter_request_body(data, request_options, omit),
            content=content,
            files=convert_file_dict_to_httpx_tuples(remove_none_from_dict(files)) if files is not None else None,
            timeout=timeout,
        )

        max_retries: int = request_options.get("max_retries", 0) if request_options is not None else 0
        if _should_retry(response=response):
            if max_retries > retries:
                time.sleep(_retry_timeout(response=response, retries=retries))
                return self.request(
                    path=path,
                    method=method,
                    base_url=base_url,
                    params=params,
                    json=json,
                    content=content,
                    files=files,
                    headers=headers,
                    request_options=request_options,
                    retries=retries + 1,
                    omit=omit,
                )

        return response

    @contextmanager
    def stream(
        self,
        path: typing.Optional[str] = None,
        *,
        method: str,
        base_url: typing.Optional[str] = None,
        params: typing.Optional[typing.Dict[str, typing.Any]] = None,
        json: typing.Optional[typing.Any] = None,
        data: typing.Optional[typing.Any] = None,
        content: typing.Optional[typing.Union[bytes, typing.Iterator[bytes], typing.AsyncIterator[bytes]]] = None,
        files: typing.Optional[typing.Dict[str, typing.Optional[typing.Union[File, typing.List[File]]]]] = None,
        headers: typing.Optional[typing.Dict[str, typing.Any]] = None,
        request_options: typing.Optional[RequestOptions] = None,
        retries: int = 0,
        omit: typing.Optional[typing.Any] = None,
    ) -> typing.Iterator[httpx.Response]:
        base_url = self.get_base_url(base_url)
        timeout = (
            request_options.get("timeout_in_seconds")
            if request_options is not None and request_options.get("timeout_in_seconds") is not None
            else self.base_timeout
        )

        with self.httpx_client.stream(
            method=method,
            url=urllib.parse.urljoin(f"{base_url}/", path),
            headers=jsonable_encoder(
                remove_none_from_dict(
                    {
                        **self.base_headers,
                        **(headers if headers is not None else {}),
                        **(request_options.get("additional_headers", {}) if request_options is not None else {}),
                    }
                )
            ),
            params=encode_query(
                jsonable_encoder(
                    remove_none_from_dict(
                        remove_omit_from_dict(
                            {
                                **(params if params is not None else {}),
                                **(
                                    request_options.get("additional_query_parameters", {})
                                    if request_options is not None
                                    else {}
                                ),
                            },
                            omit,
                        )
                    )
                )
            ),
            json=maybe_filter_request_body(json, request_options, omit),
            data=maybe_filter_request_body(data, request_options, omit),
            content=content,
            files=convert_file_dict_to_httpx_tuples(remove_none_from_dict(files)) if files is not None else None,
            timeout=timeout,
        ) as stream:
            yield stream


class AsyncHttpClient:
    def __init__(
        self,
        *,
        httpx_client: httpx.AsyncClient,
        base_timeout: typing.Optional[float],
        base_headers: typing.Dict[str, str],
        base_url: typing.Optional[str] = None,
    ):
        self.base_url = base_url
        self.base_timeout = base_timeout
        self.base_headers = base_headers
        self.httpx_client = httpx_client

    def get_base_url(self, maybe_base_url: typing.Optional[str]) -> str:
        base_url = self.base_url if maybe_base_url is None else maybe_base_url
        if base_url is None:
            raise ValueError("A base_url is required to make this request, please provide one and try again.")
        return base_url

    async def request(
        self,
        path: typing.Optional[str] = None,
        *,
        method: str,
        base_url: typing.Optional[str] = None,
        params: typing.Optional[typing.Dict[str, typing.Any]] = None,
        json: typing.Optional[typing.Any] = None,
        data: typing.Optional[typing.Any] = None,
        content: typing.Optional[typing.Union[bytes, typing.Iterator[bytes], typing.AsyncIterator[bytes]]] = None,
        files: typing.Optional[typing.Dict[str, typing.Optional[typing.Union[File, typing.List[File]]]]] = None,
        headers: typing.Optional[typing.Dict[str, typing.Any]] = None,
        request_options: typing.Optional[RequestOptions] = None,
        retries: int = 0,
        omit: typing.Optional[typing.Any] = None,
    ) -> httpx.Response:
        base_url = self.get_base_url(base_url)
        timeout = (
            request_options.get("timeout_in_seconds")
            if request_options is not None and request_options.get("timeout_in_seconds") is not None
            else self.base_timeout
        )

        # Add the input to each of these and do None-safety checks
        response = await self.httpx_client.request(
            method=method,
            url=urllib.parse.urljoin(f"{base_url}/", path),
            headers=jsonable_encoder(
                remove_none_from_dict(
                    {
                        **self.base_headers,
                        **(headers if headers is not None else {}),
                        **(request_options.get("additional_headers", {}) if request_options is not None else {}),
                    }
                )
            ),
            params=encode_query(
                jsonable_encoder(
                    remove_none_from_dict(
                        remove_omit_from_dict(
                            {
                                **(params if params is not None else {}),
                                **(
                                    request_options.get("additional_query_parameters", {})
                                    if request_options is not None
                                    else {}
                                ),
                            },
                            omit,
                        )
                    )
                )
            ),
            json=maybe_filter_request_body(json, request_options, omit),
            data=maybe_filter_request_body(data, request_options, omit),
            content=content,
            files=convert_file_dict_to_httpx_tuples(remove_none_from_dict(files)) if files is not None else None,
            timeout=timeout,
        )

        max_retries: int = request_options.get("max_retries", 0) if request_options is not None else 0
        if _should_retry(response=response):
            if max_retries > retries:
                await asyncio.sleep(_retry_timeout(response=response, retries=retries))
                return await self.request(
                    path=path,
                    method=method,
                    base_url=base_url,
                    params=params,
                    json=json,
                    content=content,
                    files=files,
                    headers=headers,
                    request_options=request_options,
                    retries=retries + 1,
                    omit=omit,
                )
        return response

    @asynccontextmanager
    async def stream(
        self,
        path: typing.Optional[str] = None,
        *,
        method: str,
        base_url: typing.Optional[str] = None,
        params: typing.Optional[typing.Dict[str, typing.Any]] = None,
        json: typing.Optional[typing.Any] = None,
        data: typing.Optional[typing.Any] = None,
        content: typing.Optional[typing.Union[bytes, typing.Iterator[bytes], typing.AsyncIterator[bytes]]] = None,
        files: typing.Optional[typing.Dict[str, typing.Optional[typing.Union[File, typing.List[File]]]]] = None,
        headers: typing.Optional[typing.Dict[str, typing.Any]] = None,
        request_options: typing.Optional[RequestOptions] = None,
        retries: int = 0,
        omit: typing.Optional[typing.Any] = None,
    ) -> typing.AsyncIterator[httpx.Response]:
        base_url = self.get_base_url(base_url)
        timeout = (
            request_options.get("timeout_in_seconds")
            if request_options is not None and request_options.get("timeout_in_seconds") is not None
            else self.base_timeout
        )

        async with self.httpx_client.stream(
            method=method,
            url=urllib.parse.urljoin(f"{base_url}/", path),
            headers=jsonable_encoder(
                remove_none_from_dict(
                    {
                        **self.base_headers,
                        **(headers if headers is not None else {}),
                        **(request_options.get("additional_headers", {}) if request_options is not None else {}),
                    }
                )
            ),
            params=encode_query(
                jsonable_encoder(
                    remove_none_from_dict(
                        remove_omit_from_dict(
                            {
                                **(params if params is not None else {}),
                                **(
                                    request_options.get("additional_query_parameters", {})
                                    if request_options is not None
                                    else {}
                                ),
                            },
                            omit=omit,
                        )
                    )
                )
            ),
            json=maybe_filter_request_body(json, request_options, omit),
            data=maybe_filter_request_body(data, request_options, omit),
            content=content,
            files=convert_file_dict_to_httpx_tuples(remove_none_from_dict(files)) if files is not None else None,
            timeout=timeout,
        ) as stream:
            yield stream
