from __future__ import annotations

import json as stdlib_json
from unittest.mock import AsyncMock, MagicMock, patch

import httpx
import pytest
from yuxi.channel.common.http import ChannelHttpClient


class TestChannelHttpClientLifecycle:
    async def test_creates_internal_client_when_none_provided(self):
        client = ChannelHttpClient()
        assert client._own_client is True
        assert isinstance(client._client, httpx.AsyncClient)
        await client._client.aclose()

    async def test_internal_client_closed_on_aexit(self):
        client = ChannelHttpClient()
        inner = client._client
        async with client:
            pass
        assert inner.is_closed

    async def test_external_client_not_closed_on_aexit(self):
        external = httpx.AsyncClient()
        client = ChannelHttpClient(client=external)
        assert client._own_client is False
        async with client:
            pass
        assert not external.is_closed
        await external.aclose()

    async def test_aenter_returns_self(self):
        client = ChannelHttpClient()
        async with client as entered:
            assert entered is client


class TestChannelHttpClientRequestJson:
    async def test_request_json_returns_parsed_response(self):
        mock_client = MagicMock()
        mock_response = MagicMock()
        mock_response.json.return_value = {"ok": True}
        mock_response.text = ""
        mock_client.request = AsyncMock(return_value=mock_response)
        client = ChannelHttpClient(client=mock_client)

        result = await client.request_json("GET", "https://example.com/api")

        assert result == {"ok": True}
        mock_client.request.assert_awaited_once_with(
            "GET",
            "https://example.com/api",
            json=None,
            params=None,
            headers=None,
            files=None,
            timeout=60.0,
        )
        mock_response.raise_for_status.assert_called_once()

    async def test_post_json_forwards_arguments(self):
        mock_client = MagicMock()
        mock_response = MagicMock()
        mock_response.json.return_value = {"id": "123"}
        mock_response.text = ""
        mock_client.request = AsyncMock(return_value=mock_response)
        client = ChannelHttpClient(client=mock_client)

        result = await client.post_json(
            "https://example.com/api",
            json={"foo": "bar"},
            params={"k": "v"},
            headers={"Authorization": "Bearer token"},
            files=[("file", b"data")],
            timeout=10.0,
        )

        assert result == {"id": "123"}
        mock_client.request.assert_awaited_once_with(
            "POST",
            "https://example.com/api",
            json={"foo": "bar"},
            params={"k": "v"},
            headers={"Authorization": "Bearer token"},
            files=[("file", b"data")],
            timeout=10.0,
        )

    async def test_get_json_forwards_arguments(self):
        mock_client = MagicMock()
        mock_response = MagicMock()
        mock_response.json.return_value = {"items": []}
        mock_response.text = ""
        mock_client.request = AsyncMock(return_value=mock_response)
        client = ChannelHttpClient(client=mock_client)

        result = await client.get_json(
            "https://example.com/api",
            params={"page": "1"},
            headers={"Accept": "application/json"},
            timeout=5.0,
        )

        assert result == {"items": []}
        mock_client.request.assert_awaited_once_with(
            "GET",
            "https://example.com/api",
            json=None,
            params={"page": "1"},
            headers={"Accept": "application/json"},
            files=None,
            timeout=5.0,
        )

    async def test_request_json_raises_on_http_status_error(self):
        mock_client = MagicMock()
        mock_response = MagicMock()
        mock_response.status_code = 500
        mock_response.text = "internal error"
        mock_client.request = AsyncMock(
            side_effect=httpx.HTTPStatusError("error", request=MagicMock(), response=mock_response)
        )
        client = ChannelHttpClient(client=mock_client)

        with pytest.raises(httpx.HTTPStatusError):
            await client.request_json("GET", "https://example.com/api")

    async def test_request_json_raises_on_request_error(self):
        mock_client = MagicMock()
        mock_client.request = AsyncMock(side_effect=httpx.RequestError("connection refused", request=MagicMock()))
        client = ChannelHttpClient(client=mock_client)

        with pytest.raises(httpx.RequestError):
            await client.request_json("GET", "https://example.com/api")

    async def test_request_json_raises_on_invalid_json(self):
        mock_client = MagicMock()
        mock_response = MagicMock()
        mock_response.json.side_effect = stdlib_json.JSONDecodeError("boom", "not json", 0)
        mock_response.text = "not json"
        mock_client.request = AsyncMock(return_value=mock_response)
        client = ChannelHttpClient(client=mock_client)

        with pytest.raises(stdlib_json.JSONDecodeError):
            await client.request_json("GET", "https://example.com/api", json=stdlib_json)

    async def test_logs_on_http_status_error(self):
        mock_client = MagicMock()
        mock_response = MagicMock()
        mock_response.status_code = 503
        mock_response.text = "service unavailable"
        mock_client.request = AsyncMock(
            side_effect=httpx.HTTPStatusError("error", request=MagicMock(), response=mock_response)
        )
        client = ChannelHttpClient(client=mock_client)

        with patch("yuxi.channel.common.http.logger") as mock_logger:
            with pytest.raises(httpx.HTTPStatusError):
                await client.request_json("POST", "https://example.com/api", json={"k": "v"})

        mock_logger.error.assert_called_once()
        message = mock_logger.error.call_args[0][0]
        assert "Channel HTTP" in message

    async def test_logs_on_request_error(self):
        mock_client = MagicMock()
        mock_client.request = AsyncMock(side_effect=httpx.RequestError("timeout", request=MagicMock()))
        client = ChannelHttpClient(client=mock_client)

        with patch("yuxi.channel.common.http.logger") as mock_logger:
            with pytest.raises(httpx.RequestError):
                await client.request_json("GET", "https://example.com/api")

        mock_logger.error.assert_called_once()

    async def test_logs_on_invalid_json(self):
        mock_client = MagicMock()
        mock_response = MagicMock()
        mock_response.json.side_effect = stdlib_json.JSONDecodeError("boom", "x", 0)
        mock_response.text = "x"
        mock_client.request = AsyncMock(return_value=mock_response)
        client = ChannelHttpClient(client=mock_client)

        with patch("yuxi.channel.common.http.logger") as mock_logger:
            with pytest.raises(stdlib_json.JSONDecodeError):
                await client.request_json("GET", "https://example.com/api", json=stdlib_json)

        mock_logger.error.assert_called_once()