import datetime as real_datetime
import json
import os
import sys

import pytest
from fastapi import HTTPException

from litellm.caching.caching import DualCache
from litellm.proxy._types import ProxyErrorTypes
from litellm.proxy.utils import ProxyLogging

sys.path.insert(
    0, os.path.abspath("../../..")
)  # Adds the parent directory to the system path


from unittest.mock import MagicMock

from litellm.proxy.utils import get_custom_url, join_paths


def test_get_custom_url(monkeypatch):
    monkeypatch.setenv("SERVER_ROOT_PATH", "/litellm")
    custom_url = get_custom_url(request_base_url="http://0.0.0.0:4000", route="ui/")
    assert custom_url == "http://0.0.0.0:4000/litellm/ui/"


def test_proxy_only_error_true_for_llm_route():
    proxy_logging_obj = ProxyLogging(user_api_key_cache=DualCache())
    assert proxy_logging_obj._is_proxy_only_llm_api_error(
        original_exception=Exception(),
        error_type=ProxyErrorTypes.auth_error,
        route="/v1/chat/completions",
    )


def test_proxy_only_error_true_for_info_route():
    proxy_logging_obj = ProxyLogging(user_api_key_cache=DualCache())
    assert (
        proxy_logging_obj._is_proxy_only_llm_api_error(
            original_exception=Exception(),
            error_type=ProxyErrorTypes.auth_error,
            route="/key/info",
        )
        is True
    )


def test_proxy_only_error_false_for_non_llm_non_info_route():
    proxy_logging_obj = ProxyLogging(user_api_key_cache=DualCache())
    assert (
        proxy_logging_obj._is_proxy_only_llm_api_error(
            original_exception=Exception(),
            error_type=ProxyErrorTypes.auth_error,
            route="/key/generate",
        )
        is False
    )


def test_proxy_only_error_false_for_other_error_type():
    proxy_logging_obj = ProxyLogging(user_api_key_cache=DualCache())
    assert (
        proxy_logging_obj._is_proxy_only_llm_api_error(
            original_exception=Exception(),
            error_type=None,
            route="/v1/chat/completions",
        )
        is False
    )


@pytest.mark.asyncio
async def test_proxy_only_error_log_marks_no_upstream_llm_call():
    """A proxy-gate error (auth/rate-limit) synthesizes a ``Logging`` object and
    fires ``pre_call`` so the failure is logged — but it must tag the object with
    ``LITELLM_LOGGING_NO_UPSTREAM_LLM_CALL`` so tracing callbacks don't fabricate
    an LLM-call span for a request that never reached a provider (root cause of the
    misplaced gen-AI span on auth failure)."""
    from litellm.constants import LITELLM_LOGGING_NO_UPSTREAM_LLM_CALL
    from litellm.proxy._types import UserAPIKeyAuth

    proxy_logging_obj = ProxyLogging(user_api_key_cache=DualCache())
    captured = {}

    def fake_pre_call(self, *args, **kwargs):
        captured["flag"] = self.model_call_details.get(
            LITELLM_LOGGING_NO_UPSTREAM_LLM_CALL
        )

    from litellm.litellm_core_utils.litellm_logging import Logging

    orig_pre_call = Logging.pre_call
    orig_async_failure = Logging.async_failure_handler
    Logging.pre_call = fake_pre_call

    async def _noop_async_failure(self, *args, **kwargs):
        return None

    Logging.async_failure_handler = _noop_async_failure
    try:
        await proxy_logging_obj._handle_logging_proxy_only_error(
            request_data={
                "model": "gpt-4o",
                "messages": [{"role": "user", "content": "hi"}],
            },
            user_api_key_dict=UserAPIKeyAuth(
                api_key="sk-bad", request_route="/v1/chat/completions"
            ),
            route="/v1/chat/completions",
            original_exception=Exception("bad key"),
        )
    finally:
        Logging.pre_call = orig_pre_call
        Logging.async_failure_handler = orig_async_failure

    assert captured.get("flag") is True


def test_get_model_group_info_order():
    from litellm import Router
    from litellm.proxy.proxy_server import _get_model_group_info

    router = Router(
        model_list=[
            {
                "model_name": "openai/tts-1",
                "litellm_params": {
                    "model": "openai/tts-1",
                    "api_key": "sk-1234",
                },
            },
            {
                "model_name": "openai/gpt-3.5-turbo",
                "litellm_params": {
                    "model": "openai/gpt-3.5-turbo",
                    "api_key": "sk-1234",
                },
            },
        ]
    )
    model_list = _get_model_group_info(
        llm_router=router,
        all_models_str=["openai/tts-1", "openai/gpt-3.5-turbo"],
        model_group=None,
    )

    model_groups = [m.model_group for m in model_list]
    assert model_groups == ["openai/tts-1", "openai/gpt-3.5-turbo"]


def test_join_paths_no_duplication():
    """Test that join_paths doesn't duplicate route when base_path already ends with it"""
    result = join_paths(
        base_path="http://0.0.0.0:4000/my-custom-path/", route="/my-custom-path"
    )
    assert result == "http://0.0.0.0:4000/my-custom-path"


def test_join_paths_normal_join():
    """Test normal path joining"""
    result = join_paths(base_path="http://0.0.0.0:4000", route="/api/v1")
    assert result == "http://0.0.0.0:4000/api/v1"


def test_join_paths_with_trailing_slash():
    """Test path joining with trailing slash on base_path"""
    result = join_paths(base_path="http://0.0.0.0:4000/", route="api/v1")
    assert result == "http://0.0.0.0:4000/api/v1"


def test_join_paths_empty_base():
    """Test path joining with empty base_path"""
    result = join_paths(base_path="", route="api/v1")
    assert result == "/api/v1"


def test_join_paths_empty_route():
    """Test path joining with empty route"""
    result = join_paths(base_path="http://0.0.0.0:4000", route="")
    assert result == "http://0.0.0.0:4000"


def test_join_paths_both_empty():
    """Test path joining with both empty"""
    result = join_paths(base_path="", route="")
    assert result == "/"


def test_join_paths_nested_path():
    """Test path joining with nested paths"""
    result = join_paths(base_path="http://0.0.0.0:4000/v1", route="chat/completions")
    assert result == "http://0.0.0.0:4000/v1/chat/completions"


def _patch_today(monkeypatch, year, month, day):
    class PatchedDate(real_datetime.date):
        @classmethod
        def today(cls):
            return real_datetime.date(year, month, day)

    monkeypatch.setattr("litellm.proxy.utils.date", PatchedDate)


def test_get_projected_spend_over_limit_day_one(monkeypatch):
    from litellm.proxy.utils import _get_projected_spend_over_limit

    _patch_today(monkeypatch, 2026, 1, 1)
    result = _get_projected_spend_over_limit(100.0, 1.0)

    assert result is not None
    projected_spend, projected_exceeded_date = result
    assert projected_spend == 3100.0
    assert projected_exceeded_date == real_datetime.date(2026, 1, 1)


def test_get_projected_spend_over_limit_december(monkeypatch):
    from litellm.proxy.utils import _get_projected_spend_over_limit

    _patch_today(monkeypatch, 2026, 12, 15)
    result = _get_projected_spend_over_limit(100.0, 1.0)

    assert result is not None
    projected_spend, projected_exceeded_date = result
    assert projected_spend == pytest.approx(214.28571428571428)
    assert projected_exceeded_date == real_datetime.date(2026, 12, 15)


def test_get_projected_spend_over_limit_includes_current_spend(monkeypatch):
    from litellm.proxy.utils import _get_projected_spend_over_limit

    _patch_today(monkeypatch, 2026, 4, 11)
    result = _get_projected_spend_over_limit(100.0, 200.0)

    assert result is not None
    projected_spend, projected_exceeded_date = result
    assert projected_spend == 290.0
    assert projected_exceeded_date == real_datetime.date(2026, 4, 21)


# ---------------------------------------------------------------------------
# L2: _enrich_http_exception_with_guardrail_context
# Regression coverage for case 2026-04-10-internal-bedrock-guardrail-streaming-error.
# ---------------------------------------------------------------------------


def test_enrich_http_exception_with_guardrail_context_dict_detail():
    """L2: dict-detail HTTPException is enriched with guardrail_name and mode."""
    from litellm.proxy.utils import _enrich_http_exception_with_guardrail_context

    class StubCallback:
        guardrail_name = "bedrock-pii-guard"
        event_hook = "post_call"

    exc = HTTPException(status_code=400, detail={"error": "Violated guardrail policy"})
    _enrich_http_exception_with_guardrail_context(exc, StubCallback())
    assert exc.detail["guardrail_name"] == "bedrock-pii-guard"
    assert exc.detail["guardrail_mode"] == "post_call"


def test_enrich_http_exception_string_detail_noop():
    """L2: string-detail HTTPException is not mutated (can't add fields to a str)."""
    from litellm.proxy.utils import _enrich_http_exception_with_guardrail_context

    class StubCallback:
        guardrail_name = "x"
        event_hook = "pre_call"

    exc = HTTPException(status_code=400, detail="Content blocked")
    _enrich_http_exception_with_guardrail_context(exc, StubCallback())
    assert exc.detail == "Content blocked"


def test_enrich_http_exception_setdefault_does_not_overwrite():
    """L2: a guardrail that already populates guardrail_name explicitly wins."""
    from litellm.proxy.utils import _enrich_http_exception_with_guardrail_context

    class StubCallback:
        guardrail_name = "inferred-name"
        event_hook = "pre_call"

    exc = HTTPException(
        status_code=400,
        detail={"error": "x", "guardrail_name": "explicit-name"},
    )
    _enrich_http_exception_with_guardrail_context(exc, StubCallback())
    assert exc.detail["guardrail_name"] == "explicit-name"


def test_enrich_http_exception_non_http_exception_noop():
    """L2: non-HTTPException is left alone and the helper does not raise."""
    from litellm.proxy.utils import _enrich_http_exception_with_guardrail_context

    class StubCallback:
        guardrail_name = "x"
        event_hook = "pre_call"

    exc = ValueError("not an HTTPException")
    _enrich_http_exception_with_guardrail_context(exc, StubCallback())
    assert str(exc) == "not an HTTPException"


def test_enrich_http_exception_callback_without_guardrail_name_noop():
    """L2: callback without guardrail_name attribute leaves detail alone."""
    from litellm.proxy.utils import _enrich_http_exception_with_guardrail_context

    class StubCallback:
        pass

    exc = HTTPException(status_code=400, detail={"error": "x"})
    _enrich_http_exception_with_guardrail_context(exc, StubCallback())
    assert exc.detail == {"error": "x"}


class TestPostCallFailureHookLiftsFirstApiCallStartTime:
    """post_call_failure_hook lifts first_api_call_start_time off the
    logging object into request_data (an internal top-level key) before
    the non-serialisable logging object is popped, so failure-path
    callbacks (OTel preprocessing latency) can still read it. It must
    never land in request_data["metadata"] (user request metadata,
    echoed downstream and typed Dict[str, str] in batch objects).
    """

    async def _run(self, request_data):
        from unittest.mock import AsyncMock, patch

        from litellm.proxy._types import UserAPIKeyAuth

        proxy_logging_obj = ProxyLogging(user_api_key_cache=DualCache())
        proxy_logging_obj.alert_types = []  # skip alerting branch
        with patch.object(proxy_logging_obj, "update_request_status", new=AsyncMock()):
            await proxy_logging_obj.post_call_failure_hook(
                request_data=request_data,
                original_exception=Exception("boom"),
                user_api_key_dict=UserAPIKeyAuth(),
            )

    @pytest.mark.asyncio
    async def test_lifts_to_top_level_and_pops_logging_obj(self):
        handoff = real_datetime.datetime(2026, 1, 1, 0, 0, 0)
        logging_obj = MagicMock()
        logging_obj.model_call_details = {"first_api_call_start_time": handoff}
        user_meta = {}
        request_data = {
            "litellm_logging_obj": logging_obj,
            "metadata": user_meta,
        }
        await self._run(request_data)

        assert request_data["first_api_call_start_time"] == handoff
        assert "litellm_logging_obj" not in request_data
        # user metadata is never touched
        assert user_meta == {}
        assert "first_api_call_start_time" not in request_data["metadata"]

    @pytest.mark.asyncio
    async def test_no_logging_obj_is_noop(self):
        request_data = {"metadata": {}}
        await self._run(request_data)
        assert "first_api_call_start_time" not in request_data

    @pytest.mark.asyncio
    async def test_logging_obj_without_anchor_is_noop(self):
        logging_obj = MagicMock()
        logging_obj.model_call_details = {}
        request_data = {"litellm_logging_obj": logging_obj}
        await self._run(request_data)
        assert "first_api_call_start_time" not in request_data
        assert "litellm_logging_obj" not in request_data