from typing import TYPE_CHECKING

import sentry_sdk
from sentry_sdk.consts import OP, SPANDATA
from sentry_sdk.integrations import DidNotEnable, Integration
from sentry_sdk.tracing_utils import (
    add_http_breadcrumb,
    add_http_request_source,
    get_url_attributes,
    has_span_streaming_enabled,
    propagate_trace_headers,
)
from sentry_sdk.utils import (
    SENSITIVE_DATA_SUBSTITUTE,
    capture_internal_exceptions,
    ensure_integration_enabled,
    nullcontext,
    parse_url,
)

if TYPE_CHECKING:
    from typing import Any

    from sentry_sdk._types import Attributes


try:
    from httpx import AsyncClient, Client, Request, Response
except ImportError:
    raise DidNotEnable("httpx is not installed")

__all__ = ["HttpxIntegration"]


class HttpxIntegration(Integration):
    identifier = "httpx"
    origin = f"auto.http.{identifier}"

    @staticmethod
    def setup_once() -> None:
        """
        httpx has its own transport layer and can be customized when needed,
        so patch Client.send and AsyncClient.send to support both synchronous and async interfaces.
        """
        _install_httpx_client()
        _install_httpx_async_client()


def _install_httpx_client() -> None:
    real_send = Client.send

    @ensure_integration_enabled(HttpxIntegration, real_send)
    def send(self: "Client", request: "Request", **kwargs: "Any") -> "Response":
        client = sentry_sdk.get_client()
        is_span_streaming_enabled = has_span_streaming_enabled(client.options)

        parsed_url = None
        with capture_internal_exceptions():
            parsed_url = parse_url(str(request.url), sanitize=False)

        url_attributes: "Attributes" = {}

        if is_span_streaming_enabled:
            if sentry_sdk.traces.get_current_span() is None:
                span_ctx = nullcontext()
            else:
                span_ctx = sentry_sdk.traces.start_span(
                    name="%s %s"
                    % (
                        request.method,
                        parsed_url.url if parsed_url else SENSITIVE_DATA_SUBSTITUTE,
                    ),
                    attributes={
                        "sentry.op": OP.HTTP_CLIENT,
                        "sentry.origin": HttpxIntegration.origin,
                        "http.request.method": request.method,
                    },
                )

            url_attributes = get_url_attributes(client, parsed_url)

            with span_ctx as streamed_span:
                propagate_trace_headers(client, request)

                try:
                    rv = real_send(self, request, **kwargs)

                    if streamed_span is not None:
                        streamed_span.status = (
                            "error" if rv.status_code >= 400 else "ok"
                        )
                        streamed_span.set_attribute(
                            "http.response.status_code", rv.status_code
                        )
                finally:
                    if streamed_span is not None:
                        streamed_span.set_attributes(url_attributes)

                if streamed_span is not None:
                    # Needs to happen within the context manager as we want to attach the
                    # final data before the span finishes and is sent for ingesting.
                    with capture_internal_exceptions():
                        add_http_request_source(streamed_span)

        else:
            with sentry_sdk.start_span(
                op=OP.HTTP_CLIENT,
                name="%s %s"
                % (
                    request.method,
                    parsed_url.url if parsed_url else SENSITIVE_DATA_SUBSTITUTE,
                ),
                origin=HttpxIntegration.origin,
            ) as span:
                span.set_data(SPANDATA.HTTP_METHOD, request.method)
                if parsed_url is not None:
                    span.set_data("url", parsed_url.url)
                    span.set_data(SPANDATA.HTTP_QUERY, parsed_url.query)
                    span.set_data(SPANDATA.HTTP_FRAGMENT, parsed_url.fragment)

                propagate_trace_headers(client, request)

                rv = real_send(self, request, **kwargs)

                span.set_http_status(rv.status_code)
                span.set_data("reason", rv.reason_phrase)

            with capture_internal_exceptions():
                add_http_request_source(span)

        breadcrumb_data = {
            SPANDATA.HTTP_METHOD: request.method,
            SPANDATA.HTTP_STATUS_CODE: rv.status_code,
            "reason": rv.reason_phrase,
        }

        if parsed_url:
            if not is_span_streaming_enabled:
                breadcrumb_data.update(
                    {
                        "url": parsed_url.url,
                        SPANDATA.HTTP_QUERY: parsed_url.query,
                        SPANDATA.HTTP_FRAGMENT: parsed_url.fragment,
                    }
                )
            elif url_attributes:
                breadcrumb_data.update(
                    {
                        "url": url_attributes.get("url.full", ""),
                        SPANDATA.HTTP_QUERY: url_attributes.get("url.query", ""),
                        SPANDATA.HTTP_FRAGMENT: url_attributes.get("url.fragment", ""),
                    }
                )

        add_http_breadcrumb(rv.status_code, breadcrumb_data)

        return rv

    Client.send = send  # type: ignore


def _install_httpx_async_client() -> None:
    real_send = AsyncClient.send

    async def send(
        self: "AsyncClient", request: "Request", **kwargs: "Any"
    ) -> "Response":
        client = sentry_sdk.get_client()
        if client.get_integration(HttpxIntegration) is None:
            return await real_send(self, request, **kwargs)

        is_span_streaming_enabled = has_span_streaming_enabled(client.options)
        parsed_url = None
        with capture_internal_exceptions():
            parsed_url = parse_url(str(request.url), sanitize=False)

        url_attributes: "Attributes" = {}

        if is_span_streaming_enabled:
            if sentry_sdk.traces.get_current_span() is None:
                span_ctx = nullcontext()
            else:
                span_ctx = sentry_sdk.traces.start_span(
                    name="%s %s"
                    % (
                        request.method,
                        parsed_url.url if parsed_url else SENSITIVE_DATA_SUBSTITUTE,
                    ),
                    attributes={
                        "sentry.op": OP.HTTP_CLIENT,
                        "sentry.origin": HttpxIntegration.origin,
                        "http.request.method": request.method,
                    },
                )

            url_attributes = get_url_attributes(client, parsed_url)

            with span_ctx as streamed_span:
                propagate_trace_headers(client, request)

                try:
                    rv = await real_send(self, request, **kwargs)

                    if streamed_span is not None:
                        streamed_span.status = (
                            "error" if rv.status_code >= 400 else "ok"
                        )
                        streamed_span.set_attribute(
                            "http.response.status_code", rv.status_code
                        )
                finally:
                    if streamed_span is not None:
                        streamed_span.set_attributes(url_attributes)

                if streamed_span is not None:
                    # Needs to happen within the context manager as we want to attach the
                    # final data before the span finishes and is sent for ingesting.
                    with capture_internal_exceptions():
                        add_http_request_source(streamed_span)
        else:
            with sentry_sdk.start_span(
                op=OP.HTTP_CLIENT,
                name="%s %s"
                % (
                    request.method,
                    parsed_url.url if parsed_url else SENSITIVE_DATA_SUBSTITUTE,
                ),
                origin=HttpxIntegration.origin,
            ) as span:
                span.set_data(SPANDATA.HTTP_METHOD, request.method)
                if parsed_url is not None:
                    span.set_data("url", parsed_url.url)
                    span.set_data(SPANDATA.HTTP_QUERY, parsed_url.query)
                    span.set_data(SPANDATA.HTTP_FRAGMENT, parsed_url.fragment)

                propagate_trace_headers(client, request)

                rv = await real_send(self, request, **kwargs)

                span.set_http_status(rv.status_code)
                span.set_data("reason", rv.reason_phrase)

            with capture_internal_exceptions():
                add_http_request_source(span)

        breadcrumb_data = {
            SPANDATA.HTTP_METHOD: request.method,
            SPANDATA.HTTP_STATUS_CODE: rv.status_code,
            "reason": rv.reason_phrase,
        }
        if parsed_url:
            if not is_span_streaming_enabled:
                breadcrumb_data.update(
                    {
                        "url": parsed_url.url,
                        SPANDATA.HTTP_QUERY: parsed_url.query,
                        SPANDATA.HTTP_FRAGMENT: parsed_url.fragment,
                    }
                )
            elif url_attributes:
                breadcrumb_data.update(
                    {
                        "url": url_attributes.get("url.full", ""),
                        SPANDATA.HTTP_QUERY: url_attributes.get("url.query", ""),
                        SPANDATA.HTTP_FRAGMENT: url_attributes.get("url.fragment", ""),
                    }
                )

        add_http_breadcrumb(rv.status_code, breadcrumb_data)

        return rv

    AsyncClient.send = send  # type: ignore