#
# Copyright 2025 Alibaba Group Holding Ltd.
#
# 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
#
#     http://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.
#
from __future__ import annotations

import json

import httpx
import pytest
from opensandbox.config import ConnectionConfig
from opensandbox.exceptions import InvalidArgumentException, SandboxApiException
from opensandbox.models.sandboxes import SandboxEndpoint

from code_interpreter.adapters.code_adapter import CodesAdapter
from code_interpreter.adapters.converter.code_execution_converter import (
    CodeExecutionConverter,
)
from code_interpreter.models.code import CodeContext, SupportedLanguage


class _SseTransport(httpx.AsyncBaseTransport):
    def __init__(self) -> None:
        self.last_request: httpx.Request | None = None

    async def handle_async_request(self, request: httpx.Request) -> httpx.Response:
        self.last_request = request
        body = (
            request.content.decode("utf-8")
            if isinstance(request.content, (bytes, bytearray))
            else ""
        )
        payload = json.loads(body) if body else {}

        if request.url.path == "/code" and payload.get("code") == "print(1)":
            sse = (
                b'data: {"type":"init","text":"exec-1","timestamp":1}\n\n'
                b'data: {"type":"stdout","text":"1\\n","timestamp":2}\n\n'
                b'data: {"type":"execution_complete","timestamp":3,"execution_time":7}\n\n'
            )
            return httpx.Response(
                200,
                headers={"Content-Type": "text/event-stream"},
                content=sse,
                request=request,
            )

        if request.url.path == "/code" and payload.get("code") == "print(2)":
            assert payload["context"]["language"] == "go"
            sse = (
                b'data: {"type":"init","text":"exec-2","timestamp":1}\n\n'
                b'data: {"type":"stdout","text":"2\\n","timestamp":2}\n\n'
                b'data: {"type":"execution_complete","timestamp":3,"execution_time":7}\n\n'
            )
            return httpx.Response(
                200,
                headers={"Content-Type": "text/event-stream"},
                content=sse,
                request=request,
            )

        return httpx.Response(
            400,
            headers={"x-request-id": "req-code-123"},
            content=b"bad",
            request=request,
        )


def test_code_execution_converter_includes_context() -> None:
    ctx = CodeContext(id="c1", language=SupportedLanguage.PYTHON)
    d = CodeExecutionConverter.to_api_run_code_request("print(1)", ctx)
    assert d["code"] == "print(1)"
    assert d["context"]["id"] == "c1"
    assert d["context"]["language"] == "python"


@pytest.mark.asyncio
async def test_run_code_streaming_happy_path_updates_execution() -> None:
    cfg = ConnectionConfig(protocol="http", transport=_SseTransport())
    endpoint = SandboxEndpoint(endpoint="localhost:44772", port=44772)
    adapter = CodesAdapter(endpoint, cfg)

    execution = await adapter.run("print(1)")
    assert execution.id == "exec-1"
    assert execution.logs.stdout[0].text == "1\n"


@pytest.mark.asyncio
async def test_run_code_streaming_merges_endpoint_headers() -> None:
    transport = _SseTransport()
    cfg = ConnectionConfig(
        protocol="http",
        transport=transport,
        headers={"X-Base": "base", "X-Shared": "base"},
    )
    endpoint = SandboxEndpoint(
        endpoint="localhost:44772",
        port=44772,
        headers={"X-Endpoint": "endpoint", "X-Shared": "endpoint"},
    )
    adapter = CodesAdapter(endpoint, cfg)

    execution = await adapter.run("print(1)")

    assert execution.id == "exec-1"
    assert transport.last_request is not None
    assert transport.last_request.headers["X-Base"] == "base"
    assert transport.last_request.headers["X-Endpoint"] == "endpoint"
    assert transport.last_request.headers["X-Shared"] == "endpoint"


@pytest.mark.asyncio
async def test_run_code_can_accept_language_string_without_context() -> None:
    cfg = ConnectionConfig(protocol="http", transport=_SseTransport())
    endpoint = SandboxEndpoint(endpoint="localhost:44772", port=44772)
    adapter = CodesAdapter(endpoint, cfg)

    execution = await adapter.run("print(2)", language=SupportedLanguage.GO)
    assert execution.id == "exec-2"
    assert execution.logs.stdout[0].text == "2\n"


@pytest.mark.asyncio
async def test_run_code_rejects_blank_code() -> None:
    cfg = ConnectionConfig(protocol="http")
    endpoint = SandboxEndpoint(endpoint="localhost:44772", port=44772)
    adapter = CodesAdapter(endpoint, cfg)

    with pytest.raises(InvalidArgumentException):
        await adapter.run("   ")


@pytest.mark.asyncio
async def test_run_code_rejects_mismatched_language_and_context() -> None:
    cfg = ConnectionConfig(protocol="http", transport=_SseTransport())
    endpoint = SandboxEndpoint(endpoint="localhost:44772", port=44772)
    adapter = CodesAdapter(endpoint, cfg)

    with pytest.raises(InvalidArgumentException):
        await adapter.run(
            "print(1)",
            context=CodeContext(language=SupportedLanguage.PYTHON),
            language=SupportedLanguage.GO,
        )


@pytest.mark.asyncio
async def test_run_code_non_200_raises_api_exception() -> None:
    cfg = ConnectionConfig(protocol="http", transport=_SseTransport())
    endpoint = SandboxEndpoint(endpoint="localhost:44772", port=44772)
    adapter = CodesAdapter(endpoint, cfg)

    with pytest.raises(SandboxApiException) as ei:
        await adapter.run("other")
    assert ei.value.request_id == "req-code-123"